Academic literature on the topic 'Dental Prosthesis, Implant-Supported'
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Journal articles on the topic "Dental Prosthesis, Implant-Supported"
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Dixit, Dr Santosh. "All-On-4 Implant with Hybrid Prosthesis Opposing Implant Supported Overdenture- A Case Report." Journal of Medical Science and clinical Research 12, no. 04 (April 30, 2024): 90–96. http://dx.doi.org/10.18535/jmscr/v12i04.14.
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Implant-supported prosthetic solutions have revolutionized the field of dental rehabilitation, particularly for patients with extensive edentulism or failing dentition. Among these, the All-on-4 implant technique has gained popularity due to its ability to provide and aesthetic restoration with fewer implants and reduced surgical complexity. However, challenges such as insufficient bone volume or poor bone quality in the edentulous maxilla or mandible may necessitate alternative approaches to ensure long-term success and patient satisfaction. One such approach involves the integration of a hybrid prosthesis with All-on-4 implant concept opposing an implant-supported overdenture. This hybrid solution combines the stability and support of dental implants with the comfort and versatility of removable prostheses, offering a balance between fixed and removable options. Key aspects covered include the selection of appropriate candidates for this treatment modality, diagnostic imaging techniques for precise implant placement, surgical protocols for achieving optimal osseointegration and soft tissue management, prosthetic fabrication processes including material selection and occlusal considerations, postoperative care and maintenance strategies to ensure long-term success. Through a comprehensive examination of current literature, clinical case studies, and expert opinions, this case report aims to provide clinicians with valuable insights into the rationale, planning, execution, and outcomes of utilizing a hybrid prosthesis with All-on-4 implant concept opposing an implant-supported overdenture. By understanding the indications, advantages, limitations, and clinical nuances of this treatment approach, dental professionals can effectively address the diverse needs and preferences of edentulous or near-edentulous patients, ultimately improving their quality of life and oral health outcomes. Keywords: All-on-4 implants, hybrid prosthesis, implant-supported overdenture, prosthetic rehabilitation, bone quality, patient satisfaction.
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Rahajoeningsih, Poedji, and Rosida Manurung. "Jenis-jenis gigitiruan dukungan implan Implant-supported dentures." Journal of Dentomaxillofacial Science 12, no. 1 (February 28, 2013): 44. http://dx.doi.org/10.15562/jdmfs.v12i1.348.
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Dental implants, or completely said as dental implant bodies, function as analogues of tooth roots, achieving aunion directly with jawbone following their insertion into a prepared socket in the bone. Implant system have threebasic components, namely the dental implant body that is lying in the jawbone, abutment that lies on the jawboneand the prosthesis. Dental implants may stabilize a removable prosthesis, complete or partial overdentures, and orsupport and stabilize a fixed prosthesis. In designing implant-supported removable prostheses, there are three formsof anchorage frequently used, namely bar/sleeve (clip) joints which links two or more implants, ball/cap anchoragesapplied individually to two or more isolated implants, and magnets/magnetic keepers. Implant-supported fixedprosthesis is either screwed to or cemented on to the abutment.
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ALMEIDA, Híttalo Carlos Rodrigues de, Ellane Talita Silvano de SANTANA, Nikácio Adnner Tavares dos SANTOS, Patrícia Karla Macedo de MORAES, Yasmin Rafaelle Furtado de ARAÚJO, and Marleny Elizabeth Marquez de Martinez GERBI. "Clinical aspects in the treatment planning for rehabilitation with overdenture and protocol-type prosthesis." RGO - Revista Gaúcha de Odontologia 63, no. 3 (September 2015): 271–76. http://dx.doi.org/10.1590/1981-863720150003000032920.
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Objective: The aim of this study was to criticaly review the published literature regarding the clinical aspects involved in the rehabilitation of edentulous patients using Branemark protocol and overdenture prostheses. Methods: An active search was conducted in the LILACS, MEDLINE, PubMed, and SciELO databases using the descriptors: "Coating for dentures" (Overlay Prosthesis and Overdenture) and "Implant-supported fixed dental prosthesis" (Protesis dental de suporte implantado, Dental prosthesis, and Implant Supported Prosthesis) in Portuguese, English, and Spanish between January 2000 and October 2014. Results: The following parameters should be considered when selecting between Branemark protocol and overdenture prostheses: bone support, lip support, lip-line, upper lip length, oral mucosa conditions and size, alveolar ridge contour, crown-bone ratio, interarch space, and speaking space. Overdenture rehabilitation can provide many benefits to patients, such as prosthetic retention, stability, comfort, and improved aesthetics. Conclusions: This study highlights the need for a thorough individualized treatment planning to ensure that fixed prostheses and overdentures have an excellent prognosis when used appropriately in suitable patients at the appropriate time.
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Bonnet, Anne Sophie, Marwan Daas, Michel Postaire, and Paul Lipiński. "Numerical Simulations of the Global Behaviour of Implant Supported or Retained Dental Prostheses." Materials Science Forum 638-642 (January 2010): 518–23. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.518.
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In spite of the recent efforts concerning prevention and treatment of dental diseases, total edentulism remains an important world health problem, even in industrialized countries. Different solutions to mandibular total edentulism are available from the classical removable denture to the implant supported prostheses. The aim of the present work is to compare, through finite element simulations, two distinct types of prosthetic solutions. The first one is an implant-supported prosthesis (ISP) using a “All-On-Four” base and the second one is a mandibular implant-retained overdenture (IRO) using two implants. A foodstuff situated on molar is modelled to simulate the mastication force. An orthotropic behaviour is assumed inside the symphyseal area. The results of the simulations show a strong influence of the prosthetic solution type on the stress and strain repartition in the implant and peri-implant bone. This can be explained by the difference of load transfer to bone between those two configurations. Indeed, in the implant-supported prosthesis, the totality of the mastication force is directly transmitted to peri-implant bone whereas the implant-retained solution benefits from a large participation of mucosa to the global load transfer from overdenture to bone.
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Toti, Paolo, Simone Marconcini, Giammarinaro Enrica, Giorgio Pedretti, Antonio Barone, and Ugo Covani. "The Influence of Prosthesis Design on the Outcomes of Tooth Implants Immediately Placed and Loaded by Means of One-Piece Titanium Machined Restoration." Journal of Oral Implantology 44, no. 2 (April 1, 2018): 87–93. http://dx.doi.org/10.1563/aaid-joi-d-17-00152.
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Our purpose was to evaluate the occurrence of complications and the degree of bone loss in a cohort of patients treated with fixed prostheses supported by immediately loaded dental implants. The primary aim was to compare partial versus full-arch fixed dental prostheses. We then tested the effect of sinus lifting. In the present retrospective cohort study, the patients had their implants restored with fixed dental prostheses supported by dental implants positioned in the posterior maxilla and mandible. When necessary, the maxillary sinuses were grafted with particulate autogenous bone. Patients were then ranked according to the following predictors: length of prosthesis, crown-to-implant ratio, number of crowns to number of implants ratio, and presence of sinus lifting. Outcomes were evaluated for up to 2 years regarding the peri-implant marginal bone loss and implant/prosthesis survival rates. Fifty-eight subjects (209 implants) were rehabilitated with 25 fixed full-arch prostheses and 33 partial fixed dental implant bridges (16 supported by implants placed in grafted sinus). The mean marginal bone loss for implants supporting partial fixed dental prostheses amounted to 0.81 mm, whereas that for implants within the group of full-arch fixed dental prostheses was 1.21 mm; the comparison of the levels in the 2 groups showed a significant difference (P = .0055). A statistically significant difference (P = .0006) was found between the bone loss around maxillary implants (1.53 mm) and the bone loss around mandibular implants (1.10 mm). Two implants and 4 prostheses failed; 2-year survival rates of partial and of full-arch fixed dental prostheses, respectively, were 94.1% and 96%. Bone loss in full-arch prostheses appeared to be higher than in that of partial prosthesis. Implant-supported prostheses in the maxillae exhibited a bone loss higher than that registered in mandibles.
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Parasrampuria, Nikita, Saurav Banerjee, Dolanchanpa Dasgupta, and Dipankar Pal. "Follow-up study of implant-tooth supported fixed dental prosthesis versus free-standing implant supported fixed dental prosthesis: A systematic review and meta-analysis." IP Annals of Prosthodontics and Restorative Dentistry 9, no. 4 (December 15, 2023): 196–205. http://dx.doi.org/10.18231/j.aprd.2023.038.
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This systematic review and meta-analysis was conducted to identify studies which compared tooth implant supported fixed dental prosthesis and exclusively implant supported fixed dental prosthesis for assessments of implant failure, prosthesis failure, abutment tooth failure and other biological and mechanical failuresA cumulative electronic and manual search were performed, and one hundred and forty-three articles published before May/June 2021 were identified. Out of these ninety-six were excluded and finally seven articles that met the inclusion criteria was included in the review.A database was established into which information extracted from each paper was tabulated. For the parameter of prosthetic stability. Overall relative risk calculated was 1.0328 with confidence interval of 0.9747 to 1.0987. p-value was 0.2623 and it was not significant. ANOVA test was run on the results which yielded f-ratio value of 0.49412 and accordingly the p-value is 0.49. Although marginal bone loss was less in tooth implant group, but the results were not significant at p < .05. Many authors were not clear about the implant failure in treatment groups. Overall, 20 implants failed in the study. 7 patients had some sort of sensory disturbance in mental region in Gunne’s and Olssun’s study.Within the limitations of the current meta-analysis and systematic review, it is suggested that implant tooth supported fixed dental prosthesis can be an alternative and viable treatment option for the replacement of partially edentulous patient since no significant difference was observed in two designs of the prostheses.
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Pradeep, Philip. "Restoration of Hybrid Prosthesis for Misplaced Implants – A Case Report." Clinical and Medical Research and Studies 1, no. 1 (August 3, 2022): 1–3. http://dx.doi.org/10.59468/2836-8525/001.
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An implant-supported hybrid prosthesis is an acrylic resin complete fixed dental prosthesis and supported by implants might be a solution in extreme cases that the need of the restoration for esthetics, function, lip support, and speech. This clinical report aims to present the esthetic and functional prosthetic rehabilitation of a borderline case with implant-supported hybrid prostheses. A 31yrs old female patient was referred to the department of prosthodontics for rehabilitation of angulated implants. The intra-arch dimension of the patient was excessive and an insufficient peri-oral soft tissue support was observed. The clinical and radiologic examinations showed satisfactory implant health. After 3 years of follow-up, no functional, phonetic, or esthetic problems with the restorations were noted. This case reports suggest that implant-supported hybrid prostheses can be a reliable alternative treatment procedure when a porcelain-fused metal fixed restoration does not satisfy a patient's requirements for esthetics, phonetics, oral hygiene, and oral comfort.
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Mai, Hai Yen, Jae-Min Seo, Jae-Kwang Jung, and Du-Hyeong Lee. "Strategic Use of CAD-CAM Interim Restoration for the Recovery of the Vertical Dimension of Occlusion in the Posterior Partially Edentulous Jaw." Applied Sciences 10, no. 21 (October 31, 2020): 7735. http://dx.doi.org/10.3390/app10217735.
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Occlusal contact loss occasionally occurs following the placement of implant-supported fixed dental prostheses in the posterior region. This complication is caused by the change in the vertical dimension of occlusion after the recovery of mastication. The change is probably related to the prosthesis sinking phenomenon and previous mandibular dislocation. The use of interim prostheses could help re-establish the vertical dimension of occlusion. The definitive prostheses can then be accurately fabricated using digital techniques in the newly established vertical dimension. In this case report, we introduce a protocol incorporating a computer-aided design and computer-aided manufacturing (CAD-CAM) interim prosthesis and digital techniques to minimize the occurrence of unexpected initial occlusal changes in the prosthetic treatment of implant-supported prostheses in the posterior region.
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Probst, Livia Fernandes, Tazio Vanni, Denise De Fátima Barros Cavalcante, Erica Tatiane da Silva, Yuri Wanderley Cavalcanti, Luis Augusto Passeri, and Antonio Carlos Pereira. "Cost-effectiveness of implant-supported dental prosthesis compared to conventional dental prosthesis." Revista de Saúde Pública 53 (February 7, 2019): 69. http://dx.doi.org/10.11606/s1518-8787.2019053001066.
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OBJECTIVE: To conduct a cost-effectiveness analysis of alternatives for rehabilitation treatment of mandibular edentulism in the context of the Brazilian Unified Health System (implantsupported total dental prosthesis versus conventional total dental prosthesis). METHODS: A Markov model was developed to capture long-term clinical and economic outcomes. The model’s population was comprised of a hypothetical cohort of 1,000,000 patients, aged 55 years, with total mandibular edentulism and without medical contraindications for performing surgical procedures. The adopted analysis perspective was that of the Brazilian Unified Health System. Based on the proposed model, we calculated cost – in BRL, and effectiveness – measured by quality-adjusted prosthesis year (QAPY). The time horizon of the analysis was 20 years. RESULTS: Considering a 5% discount in costs and effects, the incremental cost-effectiveness ratio of implant-supported total dental prostheses compared to conventional total dental prosthesis (BRL 464.22/QAPY) was lower than the willingness to pay threshold adopted in the model (BRL 3,050.00/QAPY). CONCLUSIONS: The results of this economic analysis showed that the rehabilitation of mandibular edentulous patients by implant-supported total prosthesis is very cost-effective when compared to conventional complete prosthesis, considering the cost-effectiveness limits employed.
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Venezia, Pietro, Ferruccio Torsello, Vincenzo Santomauro, Vittorio Dibello, and Raffaele Cavalcanti. "Full Digital Workflow for the Treatment of an Edentulous Patient with Guided Surgery, Immediate Loading and 3D-Printed Hybrid Prosthesis: The BARI Technique 2.0. A Case Report." International Journal of Environmental Research and Public Health 16, no. 24 (December 17, 2019): 5160. http://dx.doi.org/10.3390/ijerph16245160.
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Purpose: To describe a technique intended to transfer of the intermaxillary and occlusal relationships in a fully digital environment from a complete denture to an implant-supported 3D-printed hybrid prosthesis (an acrylic resin complete fixed dental prosthesis supported by implants). Methods: In edentulous cases, the physiological mandibular position should be determined before the immediate loading procedures. In some cases, the use of interim removable prostheses for a few weeks could be useful to test the new occlusion in centric relation and to verify the prosthetic project. When the correct intermaxillary relationships are achieved, it is difficult to transfer them from the provisional to the final prostheses, as impressions or scans of edentulous arches do not have reference points for intermaxillary records. This paper presents a complex case and the technique used to transfer information from a complete denture to an implant-supported prosthesis with a digital workflow. A prosthetic stent has been used to scan the edentulous mandibular arch and to record the intermaxillary relation. Results: The delivery of the hybrid implant-supported prostheses was carried out with no problems and minimal occlusal adjustments. The patient was extremely satisfied with the treatment and the situation remained stable at the 1-year follow up. Conclusions: The approach described in the present article predictably maintains prosthetic information and allows the delivery of a final implant-supported restoration with the same occlusal relationship as the one tested with the provisional diagnostic dentures.
Dissertations / Theses on the topic "Dental Prosthesis, Implant-Supported"
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Butignon, Luís Eduardo. "Influência do tipo de pilar de resistência mecânica pré-ciclagem, quantidade de toque retido e desajuste vertical pré e pós-ciclagem, com análise estrutural em MEV /." Araraquara : [s.n.], 2011. http://hdl.handle.net/11449/105498.
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Orientador: João Neudenir Arioli FilhoBanca: Rafael Leonardo Xediek Consani
Banca: Luiz Fernando Pegoraro
Banca: Ana Carolina Pero
Banca: Regnata Garcia Fonseca
Resumo: Problemática: De ocorrência clínica comum, o afrouxamento dos parafusos que compõe uma prótese sobre implante é uma complicação que traz transtornos tanto para o profissional quanto para o paciente. Entre os fatores que interferem na estabilidade da união parafusada destaca-se a pré-carga gerada durante o torque do parafuso, as formas como as forças se dissipam através do conjunto implante/pilar/parafuso e as características dos componentes utilizados. Proposição: O objetivo deste estudo foi analisar comparativamente três tipos de pilares sobre implantes, quanto a resistência mecânica previamente ao ensaio de carga cíclica; a porcentagem de torque retido na união parafusada e os níveis de desajuste vertical entre o pilar e o implante antes e após ciclagem; e alterações estruturais na base de assentamento dos pilares através de microscopia eletrônica de varredura (MEV). Material e método: Quarenta e cinco implantes, com conexão tipo hexágono externo foram incluídos em cilindros de PVC utilizando-se resina epóxica com módulo de elasticidade semelhante à estrutura óssea. Os grupos foram estabelecidos de acordo com o tipo de pilar utilizado (n=15): Titânio (pré-fabricado), Ouro (com cinta metálica pré-fabricada e sobre fundido) e Zircônia (pré-fabricado). Cinco pilares de cada grupo foram submetidos a teste de resistência estática para estabelecimento do valor da força a ser utilizada no ensaio de carga cíclica. Os outros 10 pilares de cada grupo foram fixados sobre os respectivos implantes através de parafuso de titânio, sob torque e retorque de 32 Ncm (pilares metálicos) e 20 Ncm (pilar de zircônia). Os corpos de prova foram submetidos à aferição do torque retido (précarga) e dos níveis de desajuste vertical... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Purpose: The aim of this study was to evaluate comparatively three type of abutment in regard to mechanical resistance before cyclic loading, the maintenance of the applied torque and vertical misfit in abutment/implant interface before and after cyclic loading, and damage surface by SEM. Material and Method: Forty five external hex implants were embedded in an epoxy resin and received your respective abutments, randomly divided in three experimental groups (n=15): (A) machined titanium (Ti) abutments; (B) premachined gold (Au) abutments and (C) machined zirconia (ZrO2) abutments. For all groups, only one type of screw was used. The abutment screws were tightened according to the manufacture's recommended torque. Initially, a static bending test was performed using 5 specimens of each group to determine the load applied in the cyclic loading test. Thus, 10 specimens of each group were used to measure the reverse torque value (preload) of the abutment screw and vertical gap between the abutments and implant, before and after loading. The tests were performed according to ISO norm 14801. A cyclic loading (0,5 x 106 cycles; 15 Hz) between 11 - 211 N was applied at an angle of 30 degrees to the long axis of the implants. Group means were compared using ANOVA and Tukey test. Result: The mechanical strength test showed that the UFL mean for Au abutments was significantly higher than the mean of the other abutments (p<0.001). The analysis of reverse torque (preload) before cyclic loading showed no significant differences among abutment groups. After cyclic loading the lowest decrease in preload was observed in group Ti, whereas the highest was observed in group ZrO2, with significant differences between them. The group Au showed an intermediate decrease, with no significant difference to the other groups. In relation to the vertical misfit... (Complete abstract click electronic access below)
Doutor
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Esfandiari, Shahrokh. "Oral health technology assessment : study of mandibular 2-implant overdentures." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115892.
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There is little evidence that Health Technology Assessment (HTA) is much used in dentistry. Dental implant technology is an example of innovative oral health technology. The objectives of this research were to gather the evidence needed for the assessment of overdenture implant treatment so that both patients and dental practitioners can make informed decisions about this technology. These objectives included 1) investigating what types of dental clinicians adopt and provide dental implants 2) determining the effect of the clinicians' experience in the provision of implant supported prostheses and 3) measuring the patients' preference in provision of mandibular 2-implants overdenture technology.For the first part, a cross-sectional survey was sent to all licensed Canadian Dentists to measure the adoption and provision of implant technology. For the second part, we used the data on the first 140 edentulous elders who were enrolled in a randomized controlled clinical trial to compare the effects of mandibular conventional (CD) and 2-implant overdentures (IOD) on nutrition. The change in patient ratings of satisfaction after treatment, laboratory costs and the number of unscheduled visits were compared. For the last part, edentulous elders (N=36) who were wearing maxillary dentures and either a mandibular conventional denture (CD, n=13) or a two-implant overdenture (IOD, n=23) participated in this study. Participants' preference was measured during a 20-minute interview.
Multivariate regression analysis on the data from the first part of the study shows that the Dentist's gender, province of practice, specialty, and whether they practice alone or in association with other practitioners, are significantly associated with the adoption of implant technology (p<0.05). It is also shown that there was no difference in satisfaction scores for either prosthesis between the groups treated by experienced specialists or new dentists. Furthermore, it is shown that IOD wearers were willing to pay three times more than the current cost of conventional dentures for implant prostheses (p<0.05).
Overall, the results of this study 1) inform decision makers on what types of clinicians provide implant technology and 2) suggest that, with minimal training, all dental clinicians irrespective of their specialty, can provide successful implant overdenture prostheses that edentulous patients are willing to pay for.
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Ribeiro, Lívia Forster 1978. "Avaliação biomecânica de próteses parciais fixas implantossuportadas na região anterior da maxila = Biomechanical evaluation of implant-supported fixed partial prosthesis in the maxilla anterior region." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287946.
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Orientador: Altair Antoninha Del Bel CuryTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: A reabilitação com próteses fixas implantossuportadas na maxila é uma das melhores opções, quando indicada, sendo consagrada na literatura. Entretanto, devido à alta exigência estética nesta região, a reabilitação com implantes, unitária ou múltipla, é bastante desafiadora tanto para o profissional como para o paciente. Nesse sentido, não somente a estética, mas também os fatores mecânicos atuantes nessas reabilitações, são de extrema importância para a longevidade do tratamento. Dessa forma, o posicionamento e o número dos implantes a serem instalados na maxila anterior têm sido fatores decisivos no planejamento do caso, tanto sob o ponto de vista estético quanto mecânico. Nesse estudo foi avaliada a influência da quantidade e disposição dos implantes na distribuição de tensões nos implantes, componentes e reabilitação protética em diferentes disposições de implantes (04 implantes (4I), 02 implantes na região dos incisivos centrais (CS), 02 implantes sendo um no incisivo central e um no incisivo lateral oposto (CSLS), 02 implantes na região dos incisivos laterais (LS)) na região anterior da maxila, por meio do método tridimensional (3D) de elementos finitos (MEF). Foram obtidos quatro modelos 3D compostos pelas seguintes estruturas: região anterior da maxila (porção cortical e trabecular), implantes cilíndricos em titânio (3.75x11mm) de interface protética do tipo cone Morse, mini-pilares em titânio, infraestrutura em zircônia e coroas cerâmicas. O tecido ósseo e as coroas foram obtidas por meio de imagem tomográfica cone Beam. Os implantes, pilares e infraestrutura protética foram criados a partir do programa CAD (Computer Aided Design) SolidWorks®. Posteriormente os modelos foram exportados para o programa computacional de análises numéricas ANSYS Workbench® para análise e obtenção dos resultados. Foi utilizado um carregamento de 150N, distribuídos nas faces palatinas das coroas protéticas, a 45° em relação ao longo eixo das coroas. Os dados obtidos mostraram a distribuição de tensões e os maiores e menores valores de tensões equivalentes de von Mises (MPa) de cada modelo. O número de implantes revelou uma importante influência no comportamento mecânico das reabilitações e demais componentes, justificados pelos menores valores de tensão encontrados no modelo 4I, em todos os seus componentes (112MPa/Implantes, 93MPa/Pilares, 61MPa/Infraestrutura e 53 MPa/coroas cerâmicas). Todavia, quando o número diminuiu para dois implantes, como visto no modelo LS, constatou-se uma maior concentração de tensão em todas as estruturas avaliadas (654MPa/Implantes, 716 MPa/Pilares, 200 MPa/Infraestrutura e 182 MPa/coroas cerâmicas). O modelo CS, e o modelo CSLS mostraram comportamento mecânico semelhantes entre si, porém com valores de tensão menores que o modelo LS e maiores que o modelo 4I (295 e 412 MPa/Implantes, 174 e 228 MPa/Pilares, 195 e 80 MPa/Infraestrutura e 121.17 e 107 MPa/coroas cerâmicas respectivamente). Conclui-se que um número maior de implantes para suportar próteses parciais fixas, distribui as tensões incididas nos implantes e componentes, de maneira mais uniforme e em menores quantidades, o que pode sugerir, que do ponto de vista mecânico, uma maior longevidade do tratamento reabilitador da região anterior da maxila
Abstract: : The oral rehabilitation with implant-supported fixed prosthesis in the maxilla is the most suitable option and is widely enshrined in the literature. Due to the high requirement aesthetics in this area, the rehabilitation with implants, single or multiple, is a big challenge for both the professional and the patient. In this sense, not only the aesthetics but also the mechanical factors acting in these rehabilitations are very important to the longevity of treatment. Thus, the positioning and the number of the implants to be installed in the anterior maxilla have been decisive factors in the planning of the case, both from the aesthetic and mechanical point of view. In this study was evaluated the influence of the number and the arrangement of the implants in stress distribution in the implants, components and prosthetic rehabilitation in different arrangements (04 implants (4I), 02 implants in the region of the central incisors (CS), 02 implants being one the central incisor and the opposite lateral incisor (CSLS) implants 02 in the region of the lateral incisors (LS)) in the anterior maxillary area by means of the method three-dimensional (3D) finite element method (FEM). The 3D models were obtained and they contained the following structures: anterior maxillary region (cortical and trabecular bone), cylindrical titanium implants (3.75x11mm) prosthetic interface type Morse taper, abutments in titanium alloy, zirconium framework and ceramic crowns. Bone tissue and the crowns were obtained by tomographic cone Beam image. The implants, abutments and prosthetic framework were created from the CAD computer software (Computer Aided Design) SolidWorks®. Subsequently the models have been exported to the computer software of numerical analysis ANSYS Workbench® for analysis and achievement of results. The magnitude of the force applied on each unit was 37,5N distributed on the palatine faces of the prosthetic crown, at a 45° angle to the long axis of each crowns, i.e. the total load applied to the prosthesis was 150N. The data obtained emphasized the stress distribution and the higher stress values the equivalent von Mises (MPa) of each model. The number of implants revealed a significant influence on the mechanical behavior of rehabilitation and other structures, justified by the lower stress values found in the model 4I, in all its components (112 MPa/Implants, 93 MPa/Abutments, 61MPa/Framework and 53 MPa/Ceramic crowns). However, when the number has decreased to two implants, as seen in the LS model, there was a higher concentration of tension in all the evaluated structures (654MPa/Implants, 716 MPa/Abutments, 200 MPa/Framework and 182 MPa/Ceramic crowns). The CS and the CSLS models showed similar mechanical behavior to each other, but with lower stress values that the LS model and larger than the 4I model (295 and 412 MPa/Implants, 174 and 228 MPa/Abutments, 195 and 80 MPa/Framework and 121.17 and 107 MPa/Ceramic crowns respectively). It was concluded that a larger number of implants to support a FPPs, distributed the stresses on the implants and in the structures more evenly and in a smaller amounts, which might suggest the greater longevity of the rehabilitation of treatment especially under the mechanical point of view
Doutorado
Protese Dental
Doutora em Clínica Odontológica
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Luthi, Leonardo Flores 1984. "Desajuste marginal e influencia na pre-carga de parafusos e nas tensões induzidas as fixações de pilares metaloplasticos sobre-fundidos." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289179.
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Orientador: Guilherme Elias Pessanha HenriquesDissertação (mestrado) - Universidade Estadual de Campinas. Faculdade de Odontologia de Piracicaba
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Resumo: Pilares tipo UCLA calcináveis são de ampla aplicabilidade na Implantodontia, pois permitem a manipulação em laboratório a custo reduzido e a individualização das próteses em função de cada paciente. Entretanto, apresentam piores resultados de adaptação marginal que os pilares pré-fabricados, embora estes agreguem custos significativamente superiores. Pilares UCLA metaloplásticos para sobre-fundição surgiram neste interstício, com prerrogativas de menores custos que os pré-fabricados e melhor adaptação que os calcináveis. Atualmente encontram-se, predominantemente, com base em liga de Ni-Cr-Ti ou Co-Cr. Todavia, não há dados relativos ao seu desempenho após a sobre-fundição, tão pouco, diante das ofertas, qual seria a melhor escolha. O objetivo neste estudo foi avaliar os desajustes marginais e a influência na indução de tensão e no destorque de parafusos protéticos de próteses confeccionadas com pilares UCLA metaloplásticos confrontando seus resultados com pilares UCLA calcináveis. Foram confeccionadas quarenta infraestruturas metálicas simulando próteses parciais fixas de três elementos retidas por dois implantes osseointegrados, obtidas por fundição a partir de transferências realizadas no modelo mestre. As estruturas foram separadas em quatro grupos (n=10) : G1, cilíndros protéticos tipo UCLA metaloplásticos com base em Co-Cr; G2, cilíndros protéticos tipo do UCLA calcináveis e fundidos em liga de Co-Cr; G3, por cilíndros protéticos tipo UCLA metaloplásticos com base em Ni-Cr-Ti; e G4, por cilíndros protéticos tipo do UCLA calcináveis e fundidos em liga de Ni-Cr-Ti. Para mensuração dos valores de desajuste marginal foi utilizada a técnica do parafuso único, o método de extensometria foi usado para análise das tensões, e os valores de pré-carga dos parafusos, após a ciclagem mecânica, foram obtidos por meio de torquímetro eletrônico digital. Os dados de desajuste marginal e tensão foram verificados antes e após a ciclagem mecânica, já os valores de pré-carga foram obtidos em intervalos de 100 mil ciclos. Os dados foram submetidos à análise variância (Três Fatores), seguidos de teste de Tukey (p=0,05) e a presença de correlação foi verificada por meio do teste de Pearson. Não foi encontrada diferença significativa entre os tipos de pilares para o desajuste, tensão e pré-carga. Os valores médios para desajuste (µm) foram G1 (3608,7 ± 1429,6) G2 (7918,3 ± 5055,9) G3 (4577,3 4017,2) G4 (9824,2 ± 1100,6). Os valores médios para tensão (gf) foram G1 (7918,3 ± 5208,8) G2 (3608,8 ± 2335,9) G3 (9824,3 ± 4125,5) G4 (4577,3 ± 15510,3). Os valores médios de pré-carga (Ncm) dentre os ciclos 0 (11,7 ± 3,8), 100 mil (9,7 ± 3,4), 200 mil (8,9 ± 3,7), 300 mil (9,3 ± 3,2), 400 mil (9,7 ± 3,4), 500 mil (10,6 ± 4). O uso de pilares metáloplasticos não reduziu os valores de desajuste marginal e tensão quando comparados aos calcináveis. A liga de Co-Cr apresentou os menores valores de desajuste marginal. O tipo de pilar e a liga utilizada influenciaram negativamente na perda de pré-carga. Não existe correlação entre tensão, desajuste marginal e pré-carga.
Abstract: Castable UCLA abutments are of wide applicability in dental implants, because they allow the manipulation in the laboratory at low cost and individualization of abutments for each patient. However, they show the worse results of marginal adaptation then the fabricated, although these aggregate costs significantly higher. UCLA premachined abutments for casting came in this interstice, with those of a lower cost than pre-made and better adaptation of the abutment. Nowadays, they are manufactured predominantly based on Ni-Cr-Ti or Co-Cr alloys. However, there is no data on its performance after the overcasting, and little is known about which one would be the best choice. Thus, the aim of this study was to analyze the marginal misfit and its influence on tension induction and in preload values of prosthetic screws in prostheses made with premachined UCLA abutmens. Forty frameworks were prepared simulating three-element metal fixed partial dentures retained by two osseointegrated implants, which were obtained through casting of acrylic resin frameworks waxed in a master model. The structures were distributed into four groups (n = 10): Group 1- premachined Co-Cr UCLA abutment; Group 2- casted Co-Cr UCLA abtument (control group 1); Group 3- premachined Ni-Cr-Ti UCLA abutment and Group 4- casted Ni-Cr-Ti UCLA abutment (control group 2). To measure the values of marginal misfit the single screw technique was used. The method of strain gage was used to analyze the stresses; and the values of preload of the bolts after cycling mechanics, were obtained by means of digital electronic torque meter. The data of marginal misfit and strain were obtained before and after of the mechanical cycling, but the values of pre-load were obtained at intervals of 100 thousand cycles. The data were submitted to variance analysis (Three-Way), followed by Tukey test (p=0.05) and the presence of correlation was verified by means of the Pearson correlation. The average values for marginal misfit (µm) were, G1 (3608.7 ± 1429.6), G2 (7918.3 ± 5055.9), G3( 4577.3 ± 4017.2), G4 (9824,2 ± 1100.6). The average values for tension (gf) were: G1 (7918,3 ± 5208.8), G2 (3608.8 ± 2335.9), G3 (9824.3 ± 4125.5) and G4 (4577.3 ± 15510.3). The averages values of preload (Ncm) among the phases: 0 (11.7 ± 3.8), 100 thousand (9.7 ± 3.4), 200 thousand (8.9 ± 3.7) 300 thousand (9.3 ± 3.2), 400 thousand (9.7 ± 3.4), 500 thousand (10.6 ± 4). The use of premachined UCLA abutment did not reduce the values of marginal misfit and strain when compared with the plastic UCLA abutments. The alloy of Co-Cr showed the lowest values of marginal misfit. The kind of abutmetns and alloy used influenced the values of preload. There was no correlation between strain, marginal misfit and preload.
Mestrado
Protese Dental
Mestre em Clínica Odontológica
5
Rodrigues, Mariana Agustinho 1987. "Avaliação da precisão de diferentes técnicas para obtenção de modelos de trabalho de próteses implantorretidas." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289177.
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Orientador: Guilherme Elias Pessanha HenriquesDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O intuito deste trabalho foi comparar diferentes técnicas de preenchimento do molde com gesso e verificar uma metodologia que fosse precisa o bastante para o julgamento das técnicas. Foram obtidos 40 modelos de gesso a partir de uma matriz metálica simulando uma situação clinica de prótese fixa implantorretida de três elementos. Os 40 modelos foram confeccionados segundo quatro técnicas de preenchimento do molde com gesso tipo IV (n=10), sendo assim foram obtidos os seguintes grupos: Grupo 1- 10 modelos de trabalho a partir do preenchimento do molde com gesso em porção única; Grupo 2- 10 modelos de trabalho obtidos a partir do preenchimento do molde com gesso em duas porções; Grupo 3- 10 modelos de trabalho obtidos segundo a técnica do manguito; Grupo 4- 10 modelos de trabalho obtidos a partir do preenchimento do molde com gesso realizando-se a união prévia dos análogos com haste metálica. Foi confeccionada estrutura metálica em titânio utilizada para mensurar os dejasustes marginais e tensão. Os desajustes verticais foram avaliados por meio de observação de desajuste marginal em microscópio com aumento de 120X e 0,1?m de precisão segundo protocolo do parafuso único para teste de passividade em estruturas implantorretidas. A análise de tensão ocorrida sobre a barra metálica foi avaliada por extensometria pela adaptação de dois strain gauges. Os dados foram submetidos à análise variância (ANOVA-1 fator), seguidos de teste de Tukey (?=0,05) para comparação entre os grupos. Foi avaliado presença de correlação entre tensão e desajuste vertical utilizando-se teste de Pearson. Não houve diferença estatística entre as técnicas de preenchimento do molde avaliadas quando comparados os valores de desajuste marginal (p=0,979), entretanto, quando se compara os valores médios de tensão sobre a barra, foi observado diferença estatística significante entre as técnicas do manguito e da união rígida dos análogos de implante (p=0,027). Desta forma, a técnica de união rígida dos análogos previamente a moldagem apresentou resultados similares à técnica convencional e uma técnica adequada para obtenção de modelos de trabalho. A utilização de strain gauges mostrou-se adequada para a avaliação de tensões ocorridas sobre a barra e comparação entre as técnicas de obtenção de modelos de gesso. Não houve correlação entre desajuste marginal e tensão ocorrida na barra
Abstract: The aim of this study was to evaluate the precision of four different mold filling techniques and verify an accurate methodology to evaluate these techniques. It was obtained 40 casts using four from a metallic matrix simulating three unit implant retained prosthesis. The molds were filled using four different techniques (n=10) following the four groups (n=10): Group 1- casts obtained with a single portion filling technique; Group 2- by using a two-step filling technique; Group 3- by using the latex cylinder technique; Group 4- by joining the implant analogues previously to the mold filling. A titanium framework was obtained used as reference to evaluate the marginal misfit and tension forces in each cast. The vertical misfit was measured with an optical microscope with an increase of 120 times following the single screw test protocol. The strain was quantified using strain gauges. Data were analyzed by ANOVA- 1 way and Tukey test (?=0,05). The correlation presence between strain and vertical misfit was evaluated by Pearson test. The misfit values did not present statistic difference (p=0,979). The strain results showed statistic difference between groups 3 and 4 (p=0,027). The splinting technique was considered as efficient as the conventional technique. The strain gauges methodology was accurate on strain measurements and cast distortion evaluation. There was no correlation between strains and marginal misfit
Mestrado
Protese Dental
Mestre em Clínica Odontológica
6
Filho, Hilmo Barreto Leite Falcão. "Análise da força de retenção de cimentos resinosos em modelo representativo da técnica de cimentação passiva para implantes osseointegráveis." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/58/58131/tde-26032010-144643/.
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O objetivo deste estudo foi analisar a força de retenção de dois cimentos resinosos utilizados na técnica de cimentação passiva para implantes osseointegráveis, Panavia F e RelyX U100, avaliando essa propriedade na sua aplicação em espécimes de três tipos de diferentes metais, NiCr (Verabond 2, Aalba Dental), NiCrTi (Tilite Ômega, Talladium) e Titânio (Ti c.p., grau 2, Realum), submetidos ou não à termociclagem. Noventa e seis cilindros calcináveis (Conexão Sistemas de Próteses) foram encerados de forma padronizada, fundidos (32 cilindros em cada tipo de liga) e cimentados sobre cilindros de titânio (Conexão Sistemas de Próteses). Os corpos-de-prova foram distribuídos em 12 grupos (n = 8) de acordo com o tipo de liga, cimento e ciclagem térmica. Todos os espécimes foram submetidos a imersão em água destilada a 37º C por 24 horas, entretanto apenas metade deles a um ensaio de termociclagem em uma máquina de simulação de ciclos térmicos MSCT-3 por 5000 ciclos durante 30 dias. Todos os corpos-de-prova foram submetidos a ensaios de tração em uma máquina de ensaios mecânicos EMIC-DL2000 (velocidade = 5mm / min e célula de carga = 500 Kgf ). A análise estatística evidenciou resistência de união à tração do cimento RelyX U100 superior ao cimento Panavia F, independente do tipo de metal utilizado, com médias de até 71,18 Kgf e 55,08 Kgf respectivamente. O ensaio de termociclagem não exibiu interferência na resistência de união de ambos cimentos.The aim of this study was to analyze the bond strength of two resin cements used in the passive cementation technique for osseointegrated implants, Panavia F and RelyX U100, evaluating this property on its application in specimens of three different metal types, NiCr (Verabond 2, Dental Aalba), NiCrTi (Tilite Omega, Talladium) and Titanium (Ti c.p., degree 2, Realum), submitted or not to termocycling assay. Ninety six calcined cylinders (Conexão Sistemas de Próteses) had been waxed of standardized form, casted (32 in each type of league) and cemented on titanium cylinders (Conexão Sistemas de Próteses). The specimens were distributed enter 12 groups (n = 8) in accordance with the type of metal, cement and thermocycling. All specimens were submitted to an immersion in distilled water at 37ºC for 24 hours, however only half of them to a termocycling assay in a simulation thermal cycles machine MSCT-3 for 5000 cycles during 30 days. All specimens were submitted to a tensile test in a mechanical test machine EMIC-DL2000 (speed = 5mm/min and cell load = 500Kgf). The statistics analysis evidenced tensile strength of the RelyX U100 cement greater than Panavia F cement independent of the metal league type used with averages until 71,18 Kgf and 55,08 Kgf respectively. The termocycling assay did not show interference in the tensile strength of both cements.
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Santiago, Junior Joel Ferreira [UNESP]. "Avaliação da influência de diferentes materiais oclusais na confecção de próteses fixas implantossuportadas unitárias com diferentes diâmetros dos implantes osseointegrados: estudo pelo método dos elementos finitos tridimensionais." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/93588.
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A literatura científica ainda é escassa em relação à influência de diferentes materiais na confecção de próteses fixas implantossuportadas unitárias em relação aos diferentes diâmetros dos implantes osseointegrados na distribuição das tensões; as suas manifestações e repercussões na prática clínica ainda não estão totalmente esclarecidas, sendo a fundamentação científica indispensável. Assim, o objetivo desta dissertação foi avaliar a influência do material de revestimento oclusal na confecção de prótese fixa implantossuportada unitária com diferentes diâmetros de implantes osseointegrados. Para o estudo foram elaborados 08 modelos, representando cada qual uma secção de osso mandibular (osso esponjoso e cortical), com a presença apenas de um implante (Conexão Master Screw, Sistemas de Próteses, São Paulo, Brasil) do tipo hexágono externo de 3.75 mm x 10 mm (4 modelos) e de 5.00 mm x 10 mm (4 modelos) com coroas de porcelana feldspática, ou de resina acrílica, ou de resina composta ou coroa liga de NiCr. Para confecção dos modelos foram utilizados os programas de desenho assistido: Rhinoceros® 3D 4.0 (NURBS Modeling for Windows, EUA) e SolidWorks® 2006 (SolidWorks Corp, Massachusetts, USA). Os desenhos tridimensionais foram exportados para o programa de elementos finitos NEI Nastran® 9.0 (Noran Engineering, Inc, EUA), para geração da malha, aplicação da carga e análise. Os resultados foram visualizados através dos mapas de tensão von Mises de cada modelo proposto, a fim de avaliar as variações individuais da distribuição das tensões no implante e na coroa; no osso os resultados foram visualizados através dos mapas de tensão máxima principal. Na carga axial (200 N), o osso cortical não mostrou grandes diferenças entre todos os modelos e o osso trabecular sofreu um aumento das tensões por tração...
The scientific literature is still scarce about the influence of different veneering materials used in fabricating superstructures for implant-retained fixed prostheses in relation to different implant diameters on stress distribution, and the manifestations and implications in clinical practice were not clarified. The aim of this dissertation was to evaluate the influence of occlusal material for single implant-supported fixed prostheses with different implant diameters. For this study were simulated 8 models, representing a section of the mandibular bone (trabecular and cortical bone) with a single external hexagonal implant (Master Screw, Conexão Sistema de Prótese ltda., Sao Paulo, Brazil) of 3.75 x 10 mm (4 models) and 5.00 mm x10 mm (4 models) with a crown with different occlusal materials: feldspathic porcelain crowns, or acrylic resin or composite resin crown or NiCr alloy. The models were designed using computer-aided design softwares : Rhinoceros® 3D 4.0 (NURBS Modeling for Windows, USA) and SolidWorks® 2006 (SolidWorks Corp., Massachusetts, USA). The three-dimensional designs were exported to the finite element program NEI Nastran® 9.0 (Noran Engineering, Inc, USA) for mesh generation, load application and analysis. The results were visualized through von Mises stress maps of each model, to assess individual variations of the stress distribution on the implant and crown; bone results were visualized through maps of maximum principal stress. In axial loading (200 N), cortical bone showed no significant differences in all models,on the trabecular bone the tensile stress increased, with regular implant diameter. For non-axial loads (100 N), the cortical bone, the tensile stress increased significantly on the side common the load application, when it reduced the implant diameter; in the trabecular bone showed seemed stress patterns, although more... (Complete abstract click electronic access below)
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Bacchi, Ataís 1986. "Influência do material de infraestrutura e do desajuste vertical de próteses parciais fixas implantossuportadas nas tensões transmitidas às estruturas protéticas e ao tecido ósseo peri-implantar." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288548.
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Orientador: Rafael Leonardo Xediek ConsaniDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O objetivo neste estudo foi avaliar a influência do material de infraestrutura e diferentes níves de desajuste vertical na concentração de tensões em prótese parcial fixa implantossuportada (infraestrutura e porcelana de cobertura), parafuso de retenção e tecido ósseo peri-implantar durante o assentamento protético e frente à aplicação de carga oclusal. Um modelo tridimensional de elementos finitos de uma porção posterior de mandíbula contendo dois implantes osseointegrados nas posições de segundo pré-molar e segundo molar, suportando uma prótese parcial fixa foi construído utilizando software específico de modelagem (SolidWorks 2010). Modelos de elementos finitos foram obtidos pela importação do modelo sólido ao software de simulação mecânica (ANSYS Workbench 11). Os modelos foram separados em grupos de acordo com o material de infraestrutura (liga de ouro tipo IV, liga de prata-paládio, titânio comercialmente puro, liga de cobalto-cromo ou zircônia) e o nível de desajuste vertical (10 ?m, 50 ?m e 100 ?m) criado na interface prótese-implante do segundo pré-molar. A concentração de tensões foi avaliada nas seguintes condições: (1) assentamento protético; e (2) cargas oclusais simultâneas de 110 N vertical e 15 N horizontal em cada dente. Os resultados obtidos mostraram que as infraestruturas mais rígidas apresentam maior concentração de tensões internas; entretanto, promoveram menores concentrações de tensão sobre a porcelana de recobrimento, em ambas condições avaliadas. Na análise do assentamento protético, materiais mais rígidos para infraestruturas aumentaram os valores de tensão no parafuso de retenção e não causaram diferença relevante nas tensões no tecido ósseo peri-implantar. Quando a carga foi aplicada, o uso de infraestruturas mais rígidas promoveu redução de tensões no parafuso de retenção e no tecido ósseo peri-implantar. Em ambas condições avaliadas um considerável aumento na concentração de tensões foi obsevado em todas as estruturas com a amplificação do desajuste. Nas diferentes simulações, o material de infraestrutura exerceu considerável influência nas tensões transmitidas às estruturas avaliadas, exceto ao tecido ósseo peri-implantar em condições de assentamento. Aumento de tensões em todas as estruturas pode ser observado com o aumento do desajuste
Abstract: The aim in this study was to evaluate the influence of the framework material and vertical misfit on the stresses created in an implant-supported partial prosthesis (framework and porcelain veneer), retention screw and peri-implant bone tissue during the settlement of the prosthesis and under load conditions. A 3-D Finite Element model of a posterior part of a jaw with two osseointegrated implants at the place of the right second pre-molar and second molar supporting an implant-supported fixed partial prosthesis was constructed using specific modeling software (SolidWorks 2010). Finite element models were obtained by importing the solid model into mechanical simulation software (ANSYS Workbench 11). The models were divided into groups according to the framework material (type IV gold alloy, silver-palladium alloy, commercially pure titanium, cobalt-chromium alloy or zirconia) and vertical misfit level (10 ?m, 50 ?m and 100 ?m) created at the second pre-molar implant-prosthesis interface. The stress concentration was evaluated in the following conditions: (1) settlement of the prosthesis; and (2) simultaneous loads of 110 N vertical and 15 N horizontal in each tooth. The obtained results showed that stiffer frameworks presented higher stress concentrations in it and led to lower stresses in the porcelain veneer, in both conditions. In the analysis of settlement of the prosthesis, stiffer framework materials increased the stress values in the retention screw and did not cause a relevant difference in the stresses values in peri-implant bone tissue. When the load was applied, the use of more stiffness frameworks led to lower stresses in the retention screw, and peri-implant bone tissue. In both conditions evaluated, considerable raise of stress concentration was observed in all the structures within misfit amplification. Comparing the results of the different simulations, the framework materials presented a considerable influence on the stress concentration in the structures evaluated, except on the peri-implant bone tissue during the settlement of the prosthesis, while a considerable increase of the stress in all the structures was observed with the increase of the misfit
Mestrado
Protese Dental
Mestre em Clínica Odontológica
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Silva, Isabela Rodrigues Teixeira da. "Efeito do parafuso cônico na simulação da mastigação sobre a interface implante/pilar em diferentes relações coroa/implante." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/23/23150/tde-05082016-151221/.
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Este estudo tem como objetivo avaliar 2 diferentes desenhos de parafusos de pilares, o parafuso de cabeça quadrada (PCQ) e o parafuso de cabeça cônica (PCC), verificando se em diferentes relações coroa/implante (RCI) haverá mudança no contra-torque após a ciclagem mecânica. Inicialmente a área superficial do PCQ e do PCC foi mensurada através da análise digital das imagens dos parafusos no software de projeto 3D SolidWorks. Foram utilizados 40 conjuntos Implante/Parafuso/Pilar, os conjuntos foram divididos em 4 grupos: GRUPO A: 10 conjuntos com pilares medindo 9,8mm de altura, simulando uma RCI>1, fixados com PCQ; GRUPO B: 10 conjuntos com pilares medindo 6,0mm de altura, simulando uma RCI<1, fixados com PCQ; GRUPO C: 10 conjuntos com pilares medindo 9,8mm de altura, simulando uma RCI>1, fixados com PCC e GRUPO D: 10 conjuntos com pilares medindo 6,0mm de altura, simulando uma RCI<1, fixados com PCC. Os 40 conjuntos foram fixados em resina acrílica a uma angulação de 30º em relação ao longo eixo. Os pilares foram fixados aos implantes aplicando um torque de aperto de 35Ncm. Os conjuntos foram posicionados na máquina de ensaios de simulação de mastigação que opera com cargas de 100Ncm e cada grupo foi ciclado até atingir 1.0x106 ciclos. Os contra-torques dos parafusos foram aferidos em torquímetro digital para todos os grupos em 2 momentos (pré-ciclagem mecânica e pós-ciclagem mecânica). Para analisar os resultados a metodologia estatística de ANOVA (nível de significância de p <= 0,05) foi utilizada, seguida de comparações múltiplas de Tukey. Na mensuração da área superficial dos parafusos verificou-se que o PCC apresenta maior área de contato entre a interface pilar/parafuso (4,16 mm²) do que o PCQ (1,76 mm²). Avaliando os fatores testados e os p-valores observou-se que o PCQ é diferente estatisticamente do PCC (p-valor <0,0001), independente do momento de avaliação, sendo que a porcentagem de contra-torque é maior para PCC (90,6%) do que para PCQ (80,9%); a RCI>1 não difere estatisticamente da RCI<1 (p-valor 0,1203), apesar da porcentagem de contra-torque ser menor para RCI>1 (84,6%) do que para RCI<1 (86,8%) e o momento pré-ciclagem mecânica diferente estatisticamente do momento pós-ciclagem mecânica (p-valor <0,0001), sendo que na pré-ciclagem a média de porcentagem do contra-torque é maior (92,5%) do que na pós-ciclagem (78,9%). Baseado nos resultados e dentro das limitações do presente estudo, podemos concluir que o PCC apresenta desempenho superior ao PCQ, no que se diz respeito a afrouxamento, o que caracteriza o PCC como uma possibilidade de melhoria em sistemas de implantes de conexão hexagonal externa. Foi possível concluir também que o desenho cônico do PCC influencia no contra-torque após a ciclagem mecânica, sendo indicado sobretudo em uma situação de RCI>1, onde o parafuso é mais requisitado.The aims of this study is to evaluate two different abutment screws designs, a flat head screw (FHS) and a conical head screw (CHS), making sure if different crown/implant ratio (CIR) result changes in the removal torque after mechanical cycling. Initially, the surface area of the FHS and a CHS was measured by digital image analysis of the screws in 3D SolidWorks Software. Forty sets implant/screw/abutment were used, the sets were divided into 4 groups: GROUP A: 10 sets with abutments 9,8mm height, simulating a CIR>1, fixed with FHS; GROUP B: 10 sets with abutments 6,0mm height, simulating a CIR<1, fixed with FHS; GROUP C: 10 sets with abutments 9,8mm height, simulating a CIR>1, fixed with CHS and GROUP D: 10 sets with abutments 6,0mm height, simulating a CIR<1, fixed with CHS. The sets were fixed in acrylic resin angled 30 ° to the long axis. The abutments were fixed to the implants by applying a torque of 35Ncm. The sets were mechanically loaded. The peak load was 100Ncm vertical force and each group was performed for 1,0x106 cycles. The preload and the postload reverse toque was measured with the digital torque meter and recorded. To analyze the results the methodology of ANOVA (significance level of p <= 0, 05) was used followed by Tukey multiple comparisons. In measuring the surface area of the screws, we found that CHS has greater contact area in the abutment/screw interface (4,16mm²) compared to FHS (1,76mm²). Evaluating the factors tested and p-values we have statistically difference between FHS and CHS (p- value < 0,0001), regardless the time of evaluation, the percentage of CHS reverse torque (90,6 %) is higher than FHS reverse torque (80,9%); CIR>1 and CIR<1 does not differ statistically (p-value 0,1203), although the percentage of reverse torque CIR>1 (84,6 %) is smaller than the percentage of reverse torque CIR<1 (86,8%) and the mechanical preload time differ statistically mechanical postloading time (p-value<0,0001 ), whereas the reversal torque in preload time (92,5%) is largest than reversal torque in postloading time (78,9 %). Based on the results and within the limitations of this study, we can conclude that the CHS outperform the FHS, as regards loosening, which features the CHS as a possible improvement in external-hex implants connections. It was also possible to conclude that the CHS design influences the reverse torque after the mechanical loading, being particularly suitable in a situation CIR>1, where the screw is most required.
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Suedam, Valdey. "Avaliação da deformação gerada nos componentes intermediários de prótese fixa implanto-suportada com diferentes alturas, com a utilização de extensômetros lineares elétricos." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/25/25135/tde-07022007-143314/.
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Em prótese total fixa implanto-suportada as diferentes alturas dos intermediários traduzem-se em diferentes braços de alavanca aos quais os implantes são submetidos levando a um efeito de deformação dos componentes que até o momento é desconhecido. O objetivo deste trabalho foi verificar a deformação gerada em diferentes alturas de componentes intermediários de prótese total fixa mandibular implanto-suportada. Para isto foi utilizado um modelo mestre de forma circular confeccionado em aço comum (Aço 1010/20) com cinco perfurações onde foram adaptadas as réplicas de fixação de 3,75mm de diâmetro, nas quais foram fixados os intermediários. O trabalho apresentou dois grupos de três corpos de prova cada, divididos de acordo com o tipo de liga das infra-estruturas(CoCr ou PdAg) e altura dos intermediários (4,0 mm, 5,5 mm e 7,0 mm), respectivamente. Foi aplicada uma força de 100N, em um ponto de referência pré-determinado na extremidade livre, a uma distância de 15mm do centro da réplica de fixação terminal e realizadas leituras das deformações geradas na mesial e na distal de cada intermediário, com o uso de extensômetros lineares elétricos. Os resultados do estudo demonstraram que o aumento da deformação captada no intermediário adjacente ao cantilever é promovido pelo aumento da altura dos intermediários e também pela utilização de uma liga de alto módulo de elasticidade.In implant-supported prosthesis the different heights of abutments represent different lever arms to which the implants are submitted, leading to a deformation of the components that is not completely understood. The objective of this study was to assess the deformation ocurring in different heights of abutments of mandibular implant-supported fixed prosthesis. A circular master cast made of steel (Steel 1010/20) was used with five perforations containing implant replicas of 3,75mm of diameter in which the abutments were seated. The specimens were divided in two groups of three specimens each, according to the type of alloy of the framework (CoCr or PdAg) and the abutment's height (4,0 mm, 5,5 mm and 7,0 mm), respectively. A force of 100N was applied at a point 15mm distal to the center of the terminal abutment. Readings of the deformations generated on the mesial and distal aspects of the abutment were obtained with the use of strain gauges. The results of this study demonstrated that the deformation observed in the abutments adjacent to the cantilever arm is proportional to the increase of the abutment's height and elastic modulous of the alloy.
Books on the topic "Dental Prosthesis, Implant-Supported"
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Pedro, Torroba Laviña, ed. Implant-supported prostheses: Occlusion, clinical cases, and laboratory procedures. Chicago: Quintessence Pub., 1995.
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Wismeijer, D. Loading protocols in implant dentistry: Edentulous patients. Berlin: Quintessence Publishing, 2010.
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Pascetta, Romeo. Atlas of dental rehabilitation techniques. Chicago: Quintessence Publishing, 2012.
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Bergkvist, Göran. Immediate loading of implants in the edentulous maxilla. Malmö, Sweden: Malmö University, Department of Prosthetic Dentistry and Department of Oral Radiology, Faculty of Odontology, 2008.
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Tealdo, Tiziano. Columbus bridge protocol: Surgical and prosthetic guidelines for an immediately loaded, implant-supported prothesis in the endentulous maxilla / Tiziano Tealdo, Marco Bevilacqua, Paolo Pera ; translation by Genni Anna Genobbio. Milan: Quintessenza Edizioni, 2012.
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author, Daas Marwan 1968, and Maló Paulo 1961 author, eds. Esthetic implant restoration in the edentulous maxilla: A simplified protocol. Chicago: Quintessence Publishing Co Inc, 2014.
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1938-, Zarb George A., Bolender Charles L, and Eckert Steven E, eds. Prosthodontic treatment for edentulous patients: Complete dentures and implant-supported prostheses. St. Louis: Mosby, 2004.
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Jimenez-Lopez, V. Oral Rehabilitation With Implant-supported Prostheses. QUINTESSENCE, 1999.
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Clinical and laboratory manual of implant overdentures. Ames, Iowa: Blackwell Munksgaard, 2007.
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Shafie, Hamid R. Clinical and Laboratory Manual of Implant Overdentures. Wiley & Sons, Incorporated, John, 2013.
Find full textBook chapters on the topic "Dental Prosthesis, Implant-Supported"
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Limmer, Bryan, Anne E. Sanders, Glenn Reside, and Lyndon F. Cooper. "Complications and Patient-Centered Outcomes with an Implant-Supported Monolithic Zirconia Fixed Dental Prosthesis: 1 Year Results." In Journal of Prosthodontics on Dental Implants, 166–76. Hoboken, New Jersey: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119115397.ch18.
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Hooper, S. M., T. Westcott, P. L. L. Evans, A. P. Bocca, and D. C. Jagger. "Implant-Supported Facial Prostheses Provided by a Maxillofacial Unit in A U.K. Regional Hospital: Longevity and Patient Opinions." In Journal of Prosthodontics on Dental Implants, 183–91. Hoboken, New Jersey: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119115397.ch20.
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Takaba, Masayuki, Shinpei Tanaka, Yuichi Ishiura, and Kazuyoshi Baba. "Implant-Supported Fixed Dental Prostheses With CAD/CAM-Fabricated Porcelain Crown and Zirconia-Based Framework." In Journal of Prosthodontics on Complex Restorations, 225–31. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119274605.ch30.
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Kim, DDS MS PhD, Jinhwan. "Controlling the Implant Supported Occlusion Utilizing the T-Scan System." In Advances in Medical Technologies and Clinical Practice, 996–1055. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-5225-9254-9.ch014.
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The relative occlusal force and real-time occlusal contact timing data provided by the T-Scan technology can be used to manage the insertion occlusal force design of implant prostheses, as their long-term survivability is tied directly to their installed occlusal function. This chapter discusses how in daily dental practice, clinicians spend a great deal of time making corrective occlusal adjustments using solely articulating paper as their intended guide. However, current research shows that articulating paper markings do not measure occlusal force, and that dentists poorly Subjectively Interpret the appearance characteristics of the markings, such that implant occlusal force control is highly compromised, leading to peri-implant tissue loss, de-osseointegration, and elevated frequency rates of breakage of implant restorative components. However, by using the T-Scan technology, the clinician eliminates the subjectivity involved in using articulating paper. This ensures the occlusal design of newly-installed implant prostheses are optimal, ensuring prosthesis longevity. Case examples are presented of how occlusal adjustments that employ T-Scan force and timing data with simultaneously-recorded EMG data aid in implant restoration occlusal force control by not only lessening masticatory muscle hyperactivity, but also by improving the muscle tone and length of the face, head, and neck musculature.
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Misch, Carl E. "Occlusal Considerations for Implant-Supported Prostheses." In Dental Implant Prosthetics, 874–912. Elsevier, 2015. http://dx.doi.org/10.1016/b978-0-323-07845-0.00031-2.
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Ćelić, Robert, Hrvoje Pezo, Stanislava Senzel, and Gracia Ćelić. "The Relationship between Dental Occlusion and “Prosthetic Occlusion” of Prosthetic Restorations Supported by Natural Teeth and Osseointegrated Dental Implants." In Dentistry. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.109941.
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The concept of human dental occlusion represents much more than the mere physical contact of the biting surfaces of opposing teeth. It is not a static, unchanging, structural relationship, but rather a dynamic, real, physiological relationship between different tissue systems. It is best defined as the functional relationship between the components of the masticatory system, which includes the teeth, the periodontium, the neuromuscular system, the temporomandibular joints and the craniofacial skeleton. Biologically, occlusion represents a coordinated functional interaction between different cell populations of the masticatory tissue systems that differentiate, model, remodel, destroy and regenerate. When the functional balance of the masticatory system is disturbed or when occlusion is restored by various types of prosthetic restorations, specific goals of occlusal treatment become important, especially today with the rapid insertion of dental implants. The aim of this chapter is to highlight the characteristics of dental occlusion in relation to the characteristics and requirements of ‘prosthetic occlusion’ for different types of prosthetic restorations supported by natural teeth, gingiva, alveolar ridges and dental implants. A particular focus in writing the chapter is the analysis of the scientific literature on the interrelationship between the so-called occlusion concepts and the biomechanical aspects of different types of implant prosthetic restorations.
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Al Jaghsi, Ahmad. "Strategic Implants under Existing Partial Removable Dentures, Why, How Many, and Which Type?" In Dentistry. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.100191.
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Inserting strategic implants under existing removable partial dentures requires a comprehensive understanding of removable prosthodontic basics and possible designs, as well as a thorough understanding of implant therapy. Prior to the widespread adoption of implants as standard prosthetic therapy, remaining roots were preserved and used to minimize bone resorption under the removable denture. Root-supported overdentures become less common after the overwhelming clinical studies that emphasize dental implants’ reliability and high success and survival rate. Fixed prostheses cannot be used to treat a severely decreased dentition unless a significant number of implants can be inserted, sufficient bone quantity and quality are available, and the patients can afford the treatment. On the other hand, using strategic implants under existing RPD upgrades the design to a more favorable support type. It improves patient satisfaction with the RPD in speaking, chewing, retention, stability, and RPD support. This improvement could be reached earlier if the patient received immediate loading. Strategic implants can also improve chewing ability, stabilize the occlusion, increase bite force and improve patient oral health-related quality of life. Moreover, better distribution of occlusal forces that may reduce bone resorption may be gained. Furthermore, strategic implants can improve comfort, confidence, and esthetics by reducing the RPD size and removing the retainers from the esthetic zone.
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Sierpińska, Teresa. "The Management of Advanced Tooth Wear Using the T-Scan/BioEMG Synchronization Module." In Handbook of Research on Computerized Occlusal Analysis Technology Applications in Dental Medicine, 467–521. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-6587-3.ch010.
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Tooth wear is considered a normal, age dependent, physiological process that leads to the loss of enamel and dentine. However, in some cases the process is so progressive that it may be pathologic. The focus of this chapter is to present the consequences of advanced tooth wear resultant from parafunction, excessive masticatory forces, imbalanced occlusal contacts, and hyperactive masticatory muscles. This chapter also outlines preventative strategies that can predictably reduce the progression of pathologic wear, which employ the T-Scan 8/BioEMG synchronization module. These two objective companion technologies assess the occlusion before, during, and after dental treatment, as well as predictably control the long-term stability of newly installed fixed, implant-supported, or removable prostheses. Their synchronization correlates muscle activity level information directly to occlusal contact force and time-sequencing information, which when applied together in the wear patient can be instrumental in tempering and eliminating pathologic occlusal wear.
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Sierpińska, MD PhD, Teresa. "Tooth Wear." In Advances in Medical Technologies and Clinical Practice, 879–943. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-5225-9254-9.ch012.
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Tooth wear is considered a normal, age-dependent, physiological process that leads to the loss of enamel and dentine. However, in some cases the process is so progressive that it may be regarded as severe or pathological. The focus of this chapter is to present the consequences of tooth wear resultant from mechanical reasons, such as parafunction, excessive masticatory forces, imbalanced occlusal contacts, and hyperactive masticatory muscles. This chapter will also outline preventative strategies that can predictably reduce the progression of pathologic wear, which employ the T-Scan 8/BioEMG synchronization module. These two objective companion technologies assess the occlusion before, during, and after dental treatment, as well as predictably control the long-term stability of newly-installed fixed, implant-supported, or removable prostheses. Their synchronization correlates muscle activity level information directly to occlusal contact force and time-sequencing information, which when applied together in the wear patient, can be instrumental in tempering and eliminating pathologic occlusal wear.
Conference papers on the topic "Dental Prosthesis, Implant-Supported"
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Kasra, Mehran, and James D. Anderson. "Framework Design for an Orofacial Implant-Supported Prosthesis." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0335.
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Abstract Loss of the entire midface leaves few options available for support of the dentition. Total loss of the maxilla bilaterally means that none of the traditional support areas are even partially useful. Surgical reconstruction of the midface is aggressive, and yet problems of support and retention for a dental prosthesis, as well as the facial prosthesis, remain. Osseointegrated implants can provide support and retention utilizing the remaining bones, but the distribution of occlusal forces becomes a concern, given their unfavourable location relative to the opposing dentition. Considerable attention has been given to framework design for intraoral implant-supported prostheses (1) but designs for extraoral framework typically have not been engineered with a view to controlling forces on the individual implants. This work describes the design procedure of such an extraoral framework which was fabricated for an individual. To minimize the possibility of unintentional overloads, consideration of the forces on each of the implants was prominent in design planning.
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Prabhu, Ajit A., and John B. Brunski. "An Overload Failure of a Dental Prosthesis: A 3D Finite Element Nonlinear Contact Analysis." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0268.
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Abstract Dental implants are extensively used to treat fully and partially edentulous patients. However, the success rates of clinical cases involving partially edentulous patients is lower than the fully edentulous cases.1 In one partially edentulous case that we have been examining, a prosthesis was supported by two screw-shaped, 3.75mm diameter Branemark implants as shown in Figure 1. The implants were separated by 7mm and were located in the molar region of the mandible. After the insertion of the implants and a healing period of 6 months, the prosthesis was put into function. After 3 months of loading, there was significant bone loss near the mesial implant which eventually lead to its mechanical failure. We have previously made a biomechanical analysis of this failed implant case using analytical2 and 3D finite element (FE) analysis.3 In the previous 3D FE study, the interface between the implant and the bone was assumed to be fully bonded. In this current investigation, the assumption of bonding vs no bonding is further investigated using 3D contact analysis. Surface to surface contact is a phenomenon that occurs between two contacting surfaces which are close to each other and might be in contact or separated depending on the interfacial stresses between the two surfaces. In this study the contact analysis is used to capture the bonding and non bonding between the bone and the implant interface.
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Ahmadian, Mohammad Taghi, Keikhosrow Firoozbakhsh, Golsa Ghanati, and Parsa Ghanati. "The Nonlinear Finite Element Analysis of a Novel Dental Implant With an Interposed Internal Layer Imitating Periodontal Ligament’s Function." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-64841.
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Osseointegrated dental implants are deficient in natural periodontal ligaments. It may therefore, disrupts the natural function of implant and leads to excessive stress and strain in jaw bone. Our new proposed implant has the nonlinear internal component which imitates periodontal ligaments function. A nonlinear finite element analysis developed to investigate the efficiency of utilizing this nonlinear internal layer for three conditions of bone implant interface conditions under vertical and horizontal loading conditions. Our results so far indicate that the use of a class of material exhibiting incompressible hyperelastic behaviour as a internal layer can reduce the peak stress deduced from different loads. The mobility of implant supported prosthesis is similar to that of natural tooth and micromotion at the bone-implant interface is decreased for both delayed and immediately loading treatment.
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Sadler, J. P., L. Wang, and L. C. Breeding. "Force Transfer Characteristics for a Double-Fastener Dental Implant." In ASME 1996 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/imece1996-1111.
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Abstract The replacement of missing teeth with an implant-supported prostheses eliminates the necessity of preparing the adjacent teeth to support and retain a conventional fixed partial denture, and may be similar in expense to the patient in many situations. Unfortunately, the implant-supported denture presents a biomechanical design problem. Screw loosening is perhaps the most common cause of structural failure. It occurs under repeated loading at stress levels below the ultimate strength of the material. With an increased understanding of the mechanical principles related to screw tightening, various mechanical explanations and assumptions have been made (Fig. 1). However, little information has been published with regard to a general model that can be used to predict the screw joint tightening and force transformation.
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Hasan, Md Abu, and Panos S. Shiakolas. "3D Finite Element Stress Analysis of an Implant Supported Overdenture Under Bruxism and Lingualized Loading Conditions." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-51688.
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Bruxism is a nonfunctional motor activity that is characterized by grinding and clenching of the teeth. It has been postulated that bruxism causes excessive occlusal load on the dental implant and its superstructures leading to biological and biomechanical complications. While many researchers suggest that grinding/clenching causes early implant complications and accelerated bone loss, others indicate that the long term effects are still unclear. The goal of this study is to analyze the effect of bruxism loading condition on the stress distribution of an implant supported overdenture (ISO) using finite element analysis (FEA) and compare the results with one of the most functionally efficient occlusion schemes in the clinical dentistry — lingualized occlusion. A high fidelity solid model of a mandibular denture encompassing lingual and buccal cusps, mesial and distal fossae supported by four implants and a connecting titanium prosthetic bar, resting on alveolar bone were modeled in SolidWorks 2013 following proper clinical guidelines and imported to ANSYS 15.0 for stress analysis. The results of the study demonstrate that the stress distribution in the implant prostheses and surrounding bone is significantly affected due to bruxism as compared to the lingualized loading. While the location of the maximum stress concentration was the same (neck of the posterior implants) for both loading conditions, there was an increase of approximately 115% von-Mises stress for bruxism loading condition as compared to the lingualized occlusion. The maximum principal stress in the cortical bone surpassed the ultimate tensile strength limit of the jaw bone implying possibility of bone resorption in the peri-implant area.