Academic literature on the topic 'Implant connection'
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Journal articles on the topic "Implant connection"
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Kim, Jung-Ju, Jae-Hyun Lee, Jeong Chan Kim, Jun-Beom Lee, and In-Sung Luke Yeo. "Biological Responses to the Transitional Area of Dental Implants: Material- and Structure-Dependent Responses of Peri-Implant Tissue to Abutments." Materials 13, no. 1 (December 22, 2019): 72. http://dx.doi.org/10.3390/ma13010072.
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The stability of peri-implant tissue is essential for the long-term success of dental implants. Although various types of implant connections are used, little is known about the effects of the physical mechanisms of dental implants on the stability of peri-implant tissue. This review summarizes the relevant literature to establish guidelines regarding the effects of connection type between abutments and implants in soft and hard tissues. Soft tissue seals can affect soft tissue around implants. In external connections, micromobility between the abutment and the hex component of the implant, resulting from machining tolerance, can destroy the soft tissue seal, potentially leading to microbial invasion. Internal friction connection implants induce strain on the surrounding bone via implant wall expansion that translates into masticatory force. This strain is advantageous because it increases the amount and quality of peri-implant bone. The comparison of internal and external connections, the two most commonly used connection types, reveals that internal friction has a positive influence on both soft and hard tissues.
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DUBOVA, Lyubov, Andrey Shlyk, Natalia Romankova, Maria Sokolova, and Georgiy Maximov. "ANALYSIS OF THE CONDITION OF THE FIXING SCREW FOR DIFFERENT TYPES OF IMPLANT AND ABUTMENT CONNECTIONS." Actual problems in dentistry 17, no. 4 (February 4, 2022): 13–17. http://dx.doi.org/10.18481/2077-7566-21-17-4-13-17.
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Subject. The design of the implant-suprastructure connection is one of the key factors influencing the success of implant-supported prosthetic treatment.
Different types of connection have their own biological and mechanical characteristics, on the knowledge of which the success of the patient's rehabilitation directly depends.
Implants are permanently exposed to a cyclic chewing load, which spreads through the prosthetic structure to the internal connection, including the implant itself, the suprastructure and the fixing screw.
The retaining screw is the weakest link in the internal connection of the implantation system.
A clear understanding of the biomechanics of the implantation system allows you to optimize individual treatment planning and reduce the risk of complications.
Objectives. Analysis and search for patterns of occurrence of biomechanical complications in various types of connections between the implant, screw and abutment. Determination of the advantages and disadvantages of using implant systems with different types of connection in orthopedic treatment based on implants, in order to improve the quality of planning and orthopedic treatment.
Methods. Literature review was carried out to assess the state of the fixing screw of an implant in various types of implant connections. To write the article, more than 90 local and foreign sources were analyzed on electronic resources PubMed, Medline, Cochrane, Elibrary, Cyberleninka for keywords.
Results. The literature review describes the current understanding of the causes of biomechanical complications arising in the connection of a dental implant, abutment and fixing screw.
Conclusions. The results of our analysis allow us to conclude that the patterns of the occurrence of biomechanical complications in various types of connections between the implant, screw and abutment are being actively studied, however, the effect of the type of connection on the fixing screw requires additional study.
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Pereira, Paulo Henrique de Souza, Marina Amaral, Kusai Baroudi, Rafael Pino Vitti, Mohammad Zakaria Nassani, and Laís Regiane da Silva-Concílio. "Effect of Implant Platform Connection and Abutment Material on Removal Torque and Implant Hexagon Plastic Deformation." European Journal of Dentistry 13, no. 03 (July 2019): 349–53. http://dx.doi.org/10.1055/s-0039-1700662.
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Abstract Objectives The aim of this study was to evaluate the plastic deformation of the hexagonal connection, and the removal torque of the implant-abutment joint of two dental implants combined with internal or external hexagonal connection implants after mechanical cycling. Materials and Methods Twenty-four dental implants were used in the study. Half of the implants had internal hexagonal connections (IH; Titamax II Plus) and the other half had external hexagonal connections (EH; Titamax Ti Ex). Four groups of two types of dental implant abutments (titanium: Ti, UCLA II Plus and zirconia: Zr, fabricated by CAD/CAM; n = 6) were investigated. The abutments received a metallic crown and the settings were submitted to mechanical cycling (MC; 106 cycles, axial load, 120N). The connection surface area was measured by scanning electron microscope (SEM) images. The removal torque was evaluated and the plastic deformation of the hexagonal surface of the implant was measured by comparing the images before and after MC. Statistical Analysis Paired-t test was used to analyze the data statistically at a significance level of α = 0.05. Results The torque values decreased for all groups after MC, and the hexagonal surface area decreased due to plastic deformation for IH and EH associated with Zr abutments. Conclusions Zirconia abutments showed the worst plastic deformation of the implant connection surface and torque loosening when associated with IH implant.
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Ramoglu, Serhat, Simge Tasar, Selim Gunsoy, Oguz Ozan, and Gokce Meric. "Tooth-Implant Connection: A Review." ISRN Biomaterials 2013 (October 21, 2013): 1–7. http://dx.doi.org/10.5402/2013/921645.
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Connecting teeth to osseointegrated implants presents a biomechanical challenge. This is due to the implant being rigidly fixed to the bone and the tooth being attached to the bone with a periodontal ligament. In order to overcome this problem, various connection types such as rigid and nonrigid have been proposed. However, the mechanism of attachment and the perceived problem of the differential support provided by the implant and the tooth have been discussed by many authors, and the ideal connection type is still controversial. The aim of this study was to carry out a review of all available literature addressing the tooth-implant connection and evidence-based understanding of the management of tooth-implant-retained restorations.
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Shetty, Manoj, Krishna Prasad D., Naresh H. G. Shetty, and Raghavendra Jaiman. "IMPLANT ABUTMENT CONNECTION: BIOMECHANICAL PERSPECTIVES." Journal of Health and Allied Sciences NU 04, no. 02 (June 2014): 047–53. http://dx.doi.org/10.1055/s-0040-1703763.
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Abstract:Dental implant therapy is a fast growing and brightest prospect in the rehabilitation of completely and partially edentulous arches. Study of implants has become indispensable and so is the biomechanics related to dental implant therapy. Implant abutment connection is a crucial synapse between the implant and the abutment. It is an important determinant of the strength and stability of an implant supported restoration, and play a major role in the success of the implant. The review describes the biomechanics of this crucial connection.
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Min-Hsuan Lin, Min-Hsuan Lin, 馮已榕 Min-Hsuan Lin, 陳俊榮 I-Jung Feng, and 毛念平 Chun-Jung Chen. "Evaluation of Peri-implant Bone Change and its Risk Factors in Patients Presenting to a Medical Center: A 7-year Cross-sectional Study." Journal of Periodontics and Implant Dentistry 5, no. 2 (September 2022): 081–87. http://dx.doi.org/10.53106/261634032022090502001.
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<p>Abstract: Objective: To evaluate the amount of peri-implant bone loss detected on digital panoramic radiographs in patient presenting to Chi-Mei medical center and to determine the factors associated with peri-implant bone loss. Materials and Methods: The panoramic radiographs of patient who presenting to Chi-Mei medical center (CMH) form year of 2008 to 2014 were screened. Those with at least one dental implant were selected and further evaluated. Submerged implants, implants with healing cap, failure implants, and implants with blurred vision were excluded. For patient level, sex, age and number of implants were recorded. For each implant obscured on the radiographs, location, type of implant-abutment connection, type of prosthesis, implant placed at CMH or non-CMH were recorded. The amount of peri-implant bone loss (PIBL) was assessed at the mesial and distal aspect using magnifying option. Clinical features of patients and implants were separately presented by descriptive statistics. Two multiple logistic regression models were also performed. Results: A total of 34.83% (650/1866) implants with detectable bone loss were identified. According to the result of chi-square test, age, implant-abutment connections and type of prosthesis were separately shown a significant influence on PIBL. Patients older than 25 years old have greater than 2.5 times risk of developing bone loss than younger patients. Comparing to the bone level with butt-joint connections, tissue level and bone level with platform switch connection separately significantly decrease 93.5% and 59.2% risk of bone loss. For the type of prosthesis evaluation, fix partial denture, overdenture and full mouth fix complete denture increased 1.97, 2.39 and 1.53 times risk of bone loss. Conclusion: Among these patients presenting to CMH with implants, the prevalence rate of peri-implant bone loss was 34.83% in implant level. Age, different implant-abutment connection designs and type of prosthesis could play a major role in peri-implant bone loss.</p> <p> </p>
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M. Cobo Vázquez, Carlos. "Management of Fixed Rehabilitation of Single Implants in the Aesthetic Sector: A Systematic Review." Corpus Journal of Surgery (CJS) 1, no. 1 (January 19, 2022): 1–7. http://dx.doi.org/10.54026/cjs/1001.
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Introduction When dental implants are installed and subjected to functional loads, marginal bone resorption is frequent, also in sites not affected by peri-implantitis, and it can be a critical factor that will affect the aesthetics and longevity of the implant because it is associated with an increased risk of peri-implantitis and soft tissue collapse. Objective To assess the peri-implant marginal bone loss and the survival percentage of implant restorations that present internal and external prosthetic connections. Material and methods A systematic review of the literature was carried out. Various information sources were consulted such as PubMed, Embase, Ovid, Scopus databases. For the search process, the methodology approved by the PRISMA Guide was followed. Results 5 articles were found that met the established criteria. In these articles, 2,866 patients rehabilitated by means of 6,455 implants were registered, of which 3,057 were restored with an external hexagonal prosthetic connection and 3,398 with an internal connection of the hexagonal or conometric type. The 3,057 implants prosthetized by connection to an external hexagon showed a mean peri-implant marginal bone loss of 0.986 ± 0.58mm. The 3,398 implants prosthetized by means of an internal hexagon or conometric type connection highlighted a mean peri-implant marginal bone loss of 0.86 + - 0.43mm. Conclusion Taking into consideration the individual characteristics of each patient and each situation, the literature seems to indicate that on the intensity of the mechanical stress and the tensions emitted to the peri-implant region, the conical connection and the cylindrical design of the implant transmit less stress to the cortical bone. Bone with respect to the external hexagonal connection and the conical design of the implant, which transmit less stress and tension to the trabecular bone and more to the cortical bone.
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Angeles Maslucan, Romy, and John Alexis Dominguez. "A Finite Element Stress Analysis of a Concical Triangular Connection in Implants: A New Proposal." Materials 15, no. 10 (May 20, 2022): 3680. http://dx.doi.org/10.3390/ma15103680.
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Conical implant–abutment connections are popular for their stability; however, in other conditions, such as excessive force, implants and abutments can absorb all the stress. Some connections with three points of support can resist more than conical connections. In recent years, different studies has shown that the design of a connection affects its stability. The aim of this study was to analyze and compare the stresses in finite elements (FEs) in a newly proposed conical triangular connection in implants with hexagonal and conical connections. A nonlinear 3D FE parametric model was developed using SOLIDWORKS 2017®. All the connections, i.e., external and internal hexagons, morse taper, conical connection, and the new conical triangular proposal were compared when axial forces of 150, 250, and 350 N were applied to the occlusal. The maximum stress was found in the external hexagon. The maximum stress was concentrated at the level of the neck of the abutment, implant, and bone, except for the morse taper; at the level of the crown and abutment, the lowest stress occurred in the new proposal. Conclusions: The new conical triangular (CT) connection and the conical connection (CC) generate similar stress in the implant, abutment, and crown. However, the CT connection improves the CC by reducing stress at the bone level, adding an advantage to having three retention points.
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Mobarek, Salma, Hala Kamal Abdel Gaber, Mohamed Samy Zaki, and Mohamed Bissar. "Clinical and radiographic assessment of peri-implant tissue changes using two different implant connections with immediate implant placement and loading." Brazilian Journal of Implantology and Health Sciences 4, no. 2 (March 14, 2022): 04–17. http://dx.doi.org/10.36557/2674-8169.2022v4n2p04-17.
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Aim: Radiographic assessment of dimensional changes of peri implant tissues in immediately placed implants with non-functional loading in maxillary esthetic zone with Internal Hex (IH) and Conical Tapered (CT) connections
Materials and Methods: 20 immediately placed implant with immediate loading were inserted in the maxillary esthetic zone, patients meeting the inclusion criteria were allocated into one of the two groups: Internal Hex or Conical tapered connection.
Results: Pink Esthetic Scores(PES) of the CT connection showed significantly higher values than IH. It was shown that the IH group showed statistically significant higher mean value than the CT connection in the values of crestal bone loss using CBCT.
Conclusion: CT connection has proved to result in better clinical, radiographic and volumetric outcomes than IH.
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Szpak, Piotr, and Jolanta Szymanska. "The survival of dental implants with different implant-abutment connection systems." Current Issues in Pharmacy and Medical Sciences 29, no. 1 (April 1, 2016): 11–13. http://dx.doi.org/10.1515/cipms-2016-0003.
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Abstract The aim of the study was to evaluate the survival of implants with different implant-abutment connection systems, in patients who had two kinds of implants implanted. In total, 240 implants were implanted - 91 implants with conical abutment Morse connection, and 149 with an internal hexagonal connection. During the follow-up period of 3 years and 10 months, the percentage of lost implants with a conical implant-abutment connection was 1.1%. Regarding the implants with hexagonal implant-abutment connection, this figure was 0.7%. Our work shows that there is a need for further research on the survival of dental implants. In this, the influence of other factors should be explored that are related both to the specific implant treatment, as well as to socio-demographic factors
Dissertations / Theses on the topic "Implant connection"
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ALBERTI, ALICE. "CLINICAL AND PRECLINICAL STUDIES OF IMPLANTS WITH A MORSE-TAPER IMPLANT-ABUTMENT CONNECTION." Doctoral thesis, Università degli Studi di Milano, 2021. http://hdl.handle.net/2434/888934.
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The project focused on the application of the Morse-taper connection in implant dentistry, which was investigated both through laboratory and through clinical examination.
Mechanical laboratory study
Among the complications that can occur at dental implants, the fracture of any implant component is a relatively infrequent but clinically significant problem. Small diameter implants are at higher risk of such complication. The aim of this laboratory study was to compare the mechanical behavior of a 2.9 mm and a 3.3 mm diameter implant with a conical connection under standard static and dynamic conditions, following the ISO 14801:2017. Finite element analysis was performed to compare the stress distribution on the tested implant systems under a 300 N, 30° inclined force. Static tests were performed with a load cell of 2 kN; force was applied on the experimental samples at 30° with respect to the implant-abutment axis, with an arm of 5.5 mm. Fatigue tests were performed with decreasing loads, at 2 Hz frequency, until three specimens survived without any damage after 2 million cycles. The emergence profile of the abutment resulted the most stressed area in finite element analysis, with a maximum stress of 5829 MPa and 5480 MPa for 2.9 mm and 3.3 mm diameter implant complex respectively. The mean maximum load resulted 360 N for 2.9 mm diameter and 370 N for 3.3 mm diameter implants. The fatigue limit was recorded to be 220 N and 240 N respectively. Despite the more favorable results of 3.3 mm diameter implants, the difference between the tested implants could be considered clinically negligible. This is probably due to the conical design of the connection, which has been reported to present low stress values in the implant neck region, thus increasing the fracture resistance.
Microbiological in vitro test
Tissue inflammation around implants could be due to microbial colonization of the implant-abutment interface (IAI). The aim of the present in vitro study was to evaluate bacterial microleakage at the IAI in Morse-taper implant-abutment connections.
A bacterial suspension containing A. actinomycetemcomitans, F. nucleatum, and P. gingivalis was inoculated into the internal cavity of ten implant-abutment samples with a Morse-taper internal connection. The samples were assembled using a calibrated beater, totally immersed individually into culture tubes, and incubated at 37°C. Turbidity analysis, real-Time PCR, and horizontal electrophoresis were performed at 24, 48 and 72 h. Performed tests were negative for every specimen, except two of them because of contamination during the manipulation of the components.
Morse-taper implants rely on a frictional connection, which results in a very narrow implant-abutment space. This can account for the sealing capability of conical connections against bacterial microleakage. Although in literature no connection type was able to provide a complete bacterial seal at the IAI, Morse-taper connection implants showed less microleakage in comparison with other connection types. The present in vitro evaluation confirmed the sealing capability of Morse-taper connections in static conditions.
Clinical study
The third part of the project is a clinical observational prospective single-arm study on Morse-taper connection implants. The main objective of the study was be to evaluate the survival rate and the clinical and radiographic success of Morse taper connection implants, used for single-tooth and partial rehabilitations, and to assess the incidence of technical and biological complications. The following data were collected:
• implant-related factors: implant type, length, and diameter
• patient-related factors: age, gender, smoking status, systemic diseases, medications, history of periodontal disease, bruxism
• cause of the initial tooth loss: aplasia, unerupted tooth, traumatic injuries, caries, periapical periodontitis, marginal periodontitis
• site-related factors: implant position, bone quantity / quality following the Lekholm and Zarb classification (Lekholm and Zarb 1985)
• prosthesis-related factors: prosthetic restoration extension (single crown, partial fixed denture), prosthetic restoration material (all-ceramic, metal-ceramic, resin).
To evaluate the clinical and radiographic success of the implants used, the following parameters were recorded during follow-up visits, 3, 6, 18, 12 and 24 months after surgery:
• Full-mouth plaque score % (FMPS%)
• Full-mouth bleeding score % (FMBS%)
• probing depth (PD) on the mesial, distal, buccal and palatal/lingual surfaces of the implants. The higher PD and the mean PD, measured as the average of four measured values, was considered for each implant.
• Bleeding scores, assessed on the basis of this scale: 0) no bleeding; 1) bleeding on probing without redness and swallowing; 2) bleeding on probing with redness and swallowing; 3) spontaneous bleeding.
• Plaque scores, assessed on the basis of this scale: 0) no plaque accumulation; 1) plaque accumulation revealed using a probe; 2) moderate accumulation of visible plaque/calculus; 3) high accumulation of visible plaque/calculus.
• distance from the implant crown margin to the coronal border of the peri-implant mucosa (DIM)
• width of keratinized mucosa (KM)
• radiographic distance between the implant shoulder and the first crestal bone-implant contact (DIB), measured on intraoral peri-apical radiographs taken a Rinn alignment system
• radiographic presence of continuous peri-implant radiolucency, measured on intraoral peri-apical radiographs taken a Rinn alignment system
• Prosthesis function
• Technical complications: implant fracture; abutment fracture; screw fracture; veneer fracture or chipping; metal framework fracture; abutment loosening; screw loosening; loss of access hole restoration.
A total of 13 patients were treated with 41 implants. At the time of the last evaluation no implants failed, and all were successful. As for complications, no technical complication occurred. None of the implants showed signs of peri-implantitis, but a diagnosis of peri-implant mucositis was formulated in 3 patients, for a total of 8 implants. Bone resorption was consistent with the phisiological bone remodelling that occurs in the first year after loading. The regression analysis did not reveal any significant effect of any of the parameters on bone resorption, except for the history of periodontitis, which had a small but significant negative effect (p=0.47).
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Kabbash, Salma Mohamed Khalifa. "An In vitro Study of Bacterial Leakage of a Novel Implant Abutment Interface." University of the Western Cape, 2020. http://hdl.handle.net/11394/7534.
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Magister Scientiae Dentium - MSc(Dent)Background: The two-stage implant system has proven to be a successful technique in replacing missing teeth (Nascimento et al., 2008). Nevertheless, the presence of micro-gaps that could entrap microbes at the implant-abutment interface (IAI) is unavoidable. This microbial leakage has been considered as one of the causes of peri-implant infection and bone loss (Scarano et al., 2005). Several companies have attempted to manufacture an implant with a connection design that provides hermetic sealing against bacterial leakage. Studies indicated that implants with internal connection, in particular the conical (Morse taper) design, have better sealing capacity in the implant abutment interface than the external design (Koutouzis et al., 2011, Jaworski et al., 2012). An internal conical implant system with a novel connection design, known as the Grand Morse (GM) connection, is reported to offer secure connection against micro-leakage (Neodent® Implant Systems Inc., 2018). Aims: The aim of this study was to test the sealing ability against bacterial leakage in the implant-abutment interface provided by an implant with a novel deep internal conical (GM) connection design.
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Hooi, Ken. "Clinically rationalising oral implant connection design. A critical review and proposal of a clinical research tool." Thesis, Faculty of Dentistry, 2009. http://hdl.handle.net/2123/5401.
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Ramos, Marcelo Barbosa. "Avaliação da capacidade de selamento de intermediários UCLA em um sistema de implante de hexágono externo." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/25/25146/tde-11112013-153728/.
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Objetivo. Avaliar a capacidade de selamento e a adaptação de intermediários UCLA, com ou sem uma cinta de cobalto-cromo (CoCr), em um sistema de implante de hexágono externo. Materiais e métodos. 120 implantes hexágono externo (Sistema de Implante Nacional - SIN, SP, Brazil) foram dividos em dois grupos (n=60) para receber intermediários UCLA de 6 fabricantes (n=10), com ou sem cinta pré-fabricada de CoCr (n=60). Os intermediários foram fundidos e subdivididos em 12 grupos da seguinte forma: M (Microplant), I (Impladen), S (SIN), Sv (Signo Vinces), T (TitaniumFix), and B (Bionnovation). A capacidade de selamento foi determinada pela colocação de 0.7 μL de azul de toluidina, 0.1% (TB) no espaço interno dos implantes antes do torque nos intermediários. Os espécimes implante-intemediários foram colocados dentro de tubos de 2.0 mL, contendo 0.7 mL de água destilada, a fim de manter a interface implante-intemediário submersa. Amostras de 100 μl foram coletadas após 1, 3, 6, 24, 48, 72, 96 e 144 horas de incubação para medição da absorbância em um espectofotômetro e devolvidos para medidas subsequentes. Para análise estatística, foram empregados o teste ANOVA a dois critérios (p < 0.05) e o teste de Tukey. Microscopia eletrônica de varredura (MEV) foi usado para visualização da adaptação da interface implante-intermediário. Resultados. Os grupos M, Sv, e T sem cinta CoCr apresentaram completa liberação de corante (TB) em 1 h, enquanto que nos grupos I, S, e B, a liberação do corante ocorreu em 3, 24 e 96 h, respectivamente. Para os intermediários com cinta préfabricada, a completa liberação de corante ocorreu em 6 h para o grupo S, em 24 h para os grupos Sv, T e B, e em 72 h para os grupos M e I. Foram observados desajustes na interface implante/intermediário em todos os grupos. Os desajustes mais evidentes foram observados para os grupos M e T, sem cinta de CoCr. Conclusões. A completa liberação de corante foi observada em diferentes períodos de tempo para todos intermediários UCLA, independentemente, da presença ou não da cinta CoCr. Foram observados espaços ou desajustes na interface implante/intermediário em todos os grupos.To evaluate the effect of the presence of a prefabricated cobalt-chromium (CoCr) margin in a universal castable long abutment (UCLA) in the sealing capability and fit of the implant-abutment mating zone. Materials andmethods. One-hundred and twenty external hexagon implants (SIN, SP, Brazil) were divided in two groups (n=60 each) to receive UCLA abutments from 6 manufacturers (n=10 each) either with or without a CoCr margin (n=60 each). Abutments were cast and 12 groups were formed and named as: M (Microplant), I (Impladen), S (SIN), Sv (Signo Vinces), T (TitaniumFix), and B (Bionnovation). Sealing was determined by placing 0.7 μL of 0.1% toluidine blue (TB) in the implant wells before abutment torquing. Implant-abutment samples were placed into 2.0 mL vials containing 0.7 mL of distilled water to maintain the implant-abutment interface submerged. Aliquots of 100 μl of water were retrieved at 1, 3, 6, 24, 48, 72, 96 and 144 hours incubation times for absorbance measurement in a spectrophotometer, and returned for repeated measurements. Two-way ANOVA (p < 0.05) and Tukey\'s test were used. Scanning electron microscopy (SEM) was used for observation of the implant-abutment fit. Results. Groups M, Sv, and T without the CoCr margin resulted in complete release of TB at 1 h, whereas I, S, and B did at 3, 24 and 96 h, respectively. Complete leakage in abutments with the prefabricated marginoccurredat 6 h for S, 24 h for Sv, T and B, and 72 h for M and I. Implant/abutment gaps were observed in all groups. A poorer fit was depicted for groups M and T without the CoCr margin. Conclusions. Complete leakage was observed for all UCLA abutments regardless of the presence of the CoCrmargin. Implant-abutment gaps was observed for all groups.
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Rama, Glauber Macedo. "Próteses parciais fixas apoiadas sobre conexão dente-implante rígida: análise do comportamento biomecânico antes e após ciclagem mecânica." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/58/58131/tde-12122014-103741/.
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A associação entre dente e implante em uma prótese parcial fixa (PPF) vêm sido questionada há muitos anos devido a suas implicações clínicas, incluindo a seleção do melhor tipo de união dos elementos protéticos (conexão rígida ou semi-rígida). Este estudo avaliou próteses dento-implanto-suportadas de conexão rígida do tipo cimentada sobre 3 tipos de conexão protética (hexágono externo - HE, hexágono interno - HI e cone morse - CM) e sua relação com o desajuste vertical e falhas na prótese antes e após ciclagem mecânica, além da análise fotoelástica destas situações. Foram confeccionados 21 corpos de prova (7 HE, 7 HI e 7 CM) sobre um modelo mestre que simulou a perda dentária dos elementos 46 e 47, sendo um implante posicionado na área do 47 e um dente preparado com ligamento periodontal simulado em poliéter na área do 45. Sobre este modelo foram confeccionadas PPFs metalocerâmicas de 3 elementos rígidas cimentadas sobre dente e implante (munhão universal). Os corpos de prova foram preparados e submetidos ao ensaio de ciclagem mecânica com uma carga de 120N por 1.000.000 de ciclos, simulando o uso clínico da prótese por 2 anos. Análises do desajuste vertical foram realizadas por meio de microscopia óptica (40x) em todos os períodos de confecção das PPFs (antes da solda, após solda, após aplicação da cerâmica e após ciclagem). O percentual de falhas nas próteses após ciclagem também foi avaliado (trincas/fraturas/decimentações), além da execução do ensaio fotoelástico (carga pontual dental, bipontual nos pilares e oclusal simultânea). Os resultados obtidos para o desajuste vertical indicaram um aumento significante dos níveis de desajuste para todas as etapas de confecção tanto para dente quanto implante (p<0,0001), porém não significante entre os grupos (p>0,059). Para o percentual de falhas na prótese, encontrou-se um índice decrescente na ordem CM>HI>HE. Para análise fotoelástica, encontrou-se um índice de concentração de tensões crescente na ordem CM<HI<HE. Baseado nos resultados encontrados, dentro das limitações do estudo foi possível concluir que: os níveis de desajuste vertical tendem a aumentar nas etapas de confecção da prótese para todas as conexões protéticas; a fadiga mecânica tende a interferir no grau de desajuste vertical a longo prazo pela deformação da estrutura a depender de sua espessura; o aumento no percentual de falhas da prótese tende a ser proporcional ao aumento da rigidez da conexão protética; apesar da redução da rigidez da conexão protética favorecer a longevidade da PPF, esta também tende a aumentar as tensões nos elementos pilares e stress no osso circundante; a utilização da conexão Morse subcrestal para união dente-implante rígida tende a ser preferível pela preservação dos elementos pilares devido a menor concentração de tensões em detrimento da longevidade da PPF, entretanto esta pode ser substituída caso a falha seja irreversível.The association between tooth and implant in fixed partial dentures (FPD′s) have been questioned for many years due to its clinical implications, including selecting the best kind of connection design (rigid or semi-rigid connection). This study assessed cemented toothimplant supported rigid connected FPD′s on 3 types of implant connections (external hexagon - EH, internal hexagon - IH and morse taper - MT) and its relationship to the vertical misfit and FPD failure before and after mechanical cycling plus the photoelastic analysis of those situations. 21 specimens (7 EH, 7 IH and 7 MT) were fabricated on a master model that simulated tooth loss of elements 46 and 47, with an implant placed on the 47 area and a prepared tooth with simulated periodontal ligament in polyether on the 45 area. On this model, three-element metalloceramic rigid FPD′s were made, cemented to tooth and implant (universal post). The specimens were prepared and subjected to mechanical cycling with a 120N load under 1,000,000 cycles, simulating a 2-year clinical use of the prosthesis. Analyses of vertical misfit were performed by optical microscopy (40x) in all periods of FPD′s fabrication (before welding, after welding, after application of ceramic and after cycling). The FPD failure percentage after cycling was also evaluated (cracks/fractures/loss of cementation), and photoelastic test was performed (dental load only, simultaneous abutment load and occlusal load). The results for vertical misfit indicated a significant increase in the levels of misfit for all stages of fabrication for both tooth and implant (p<0.0001) but not significant between groups (p>0.059). For the FPD failure percentage, we found a decreasing rate in the order MT>IH>EH. The photoelastic test indicated a major amount of tension increase in the order MT<IH<EH. Based on these results, within the limitations of the study it was concluded that: the levels of vertical misfit tend to increase in the prosthesis fabrication steps for all implant connections; mechanical fatigue tends to interfere on vertical misfit in long term due to deformation of the framework depending on its thickness; the FPD failure percentage tends to be proportional to the rigidity increase of the implant connection; despite the decrease of rigidity of the implant connection favors the longevity of the FPD, this also tends to increase tensions on the abutments and stress on the surrounding bone; the use of subcrestal morse taper connection on rigid tooth-implant FPD′s tends to be preferable for the preservation of the abutments due to the lower abutment stress concentration at the expense of longevity of FPD, though this can be replaced if the failure is irreversible.
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SANTANA, Washington Macedo de. "Avaliação da infiltração microbiana na interface implante-abutment em conexões tipo hexágono interno e cone-morse de implantes osseointegráveis." Universidade Federal de Goiás, 2007. http://repositorio.bc.ufg.br/tede/handle/tde/1378.
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Previous issue date: 2007-09-28The scientific literature has reported that dental implants can be affected by the oral microorganisms through the formation of a bacterial biofilm. The region most affected is the connection between the implant platform and the prosthetic abutment, particularly in implants with an external connection. Therefore, the region of the implant/abutment connection can participate in the development of peri-mucositis or peri-implantitis. They propose that these implant/abutment connections known as morse taper provide an effective seal against microorganisms. Thus the objective of this research was to evaluate the microleakage on the implant/abutment interface of internal hex and morse taper prosthetic connections. Thirty five (35) implants were selected and divided into seven (7) groups (5 groups of implants from Brazilian manufacturers and 2 groups of implants manufactured abroad). The tested implants were Straumann (Straumann AG® / Switzerland), Ankylos (Dentsply-Friadent® / Germany), AR Morse (Conexão/Sistema de Prótese® São Paulo-SP), Titamax CM (Neodent® /Curitiba-PR), Titamax II Plus (Neodent®/Curitiba-PR), Stronger (Sin/Sistema Nacional de Implante® São Paulo - SP) e Titanium Fix CM (AS Technology / São José dos Campos-SP). For the microbiological test the bacterium Enterococus faecalis (ATCC 29212) was selected. This bacterium was inoculated in the interior aspect of the implant followed by immediate installation and final torque (N/cm) of the prosthetic abutment. The implant/abutment set up was then placed in a Brain Heart Infusion broth (BHI) and incubated in this broth for 14 days. During this period, the cloudiness of the broth was evaluated at days 7 and 14. The data were statistically analyzed by the Kruskal Wallis method. The results demonstrated that all samples from both Ankylos and Neodent CM groups did not present microleakage. Although 20% of samples from Conexao AR Morse group presented microleakage, there was no significant statistical difference when compared to the former two groups. Furthermore, all samples from Straumann,Titanium Fix CM, Neodent Titamax II Plus, and SIN Strong groups presented microleakage after 14 days of culture (p=0.05), though correlation analysis among these samples did not reveal significant statistical differences.
A literatura tem ressaltado que os implantes osseointegráveis podem ser afetados por transtornos decorrentes da formação de biofilme bacteriano em sua superfície. A região acometida envolve principalmente a conexão entre a plataforma do implante e o abutment, situação evidenciada especialmente nos implantes de conexões externas. Assim, tal situação pode culminar na formação de mucosites ou até mesmo perimplantites. Alguns tipos de conexões têm sido colocados no mercado pelos fabricantes de implantes com proposta de melhor selamento microbiológico. Baseada nesta consideração, esta pesquisa teve como propósito avaliar a microinfiltração na interface implante-abutment das conexões protéticas de alguns sistemas de hexágono interno e das conexões internas conemorse, que propõem capacidade efetiva de vedamento microbiológico. Para sua execução foram selecionados 35 implantes divididos em 7 grupos (5 grupos de implantes de procedência de empresas nacionais e 2 grupos advindos de empresas importadas). Os implantes analizados foram Straumann (Straumann AG® / Switzerland) e Ankylos (Dentsply-Friadent® / Germany), AR Morse (Conexão/Sistema de Prótese® São Paulo-SP), Titamax CM (Neodent® /Curitiba-PR), Titamax II Plus (Neodent®/Curitiba-PR), Stronger (Sin/Sistema Nacional de Implante® São Paulo - SP) e Titanium Fix CM (AS Technology / São José dos Campos-SP). Para os testes de contaminação, foi selecionada a bactéria Enterococcus faecalis (ATCC 29212), sendo esta inoculada no interior do implante com a imediata instalação e torque (N/cm) do respectivo abutment (pilar protético). Posteriormente, o conjunto pilar/implante inoculado foi colocado em meio de cultura caldo infusão de cérebro e coração (BHI) e mantido neste meio por um período de 14 dias. Durante este período, o controle da contaminação indicando microinfiltração foi feito pelo turvamento do meio de cultura, avaliado aos 7 dias e aos 14 dias após inoculação. Após a coleta dos dados, foi aplicado teste estatístico pelo método não paramétrico de Kruskal- Wallis e os resultados demonstraram que todas as amostras do grupo Ankylos e Neodent CM não apresentaram microinfiltração, sendo que 20% do grupo Conexão AR Morse apresentaram microinfiltração, contudo sem apresentar diferenças estatísticas significativas quando comparados com os grupos anteriores. Ainda, as amostras dos grupos Straumann, Titanium-Fix CM, Neodent Titamax II Plus e SIN Strong apresentaram todas as amostras infiltradas após 14 dias do estudo (nível de significância alfa=0,05) e na avaliação da correlação entre estas amostras, constatou-se que não houve diferenças estatísticas significativas entre si.
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Pessoa, Roberto Sales e. [UNESP]. "Influência do tipo de conexão protética, do platform-switching e do designe do implante no ambiente biomecânico de implantes imediatos com carga imediata." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/104182.
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pessoa_rs_dr_arafo.pdf: 1780565 bytes, checksum: 78498002897f7571851e27403dd44a72 (MD5)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
O objetivo do presente trabalho de pesquisa foi avaliar a influencia do tipo de conexao protetica, do platform-switching, e do design do implante no ambiente biomec.nico de implantes imediatos com carga imediata. Para tanto, um modelo de alveolo de extraçao de um incisivo central superior foi constru.do baseado em tomografia computadorizada. Implantes inseridos no alveolo de extra..o foram avaliados por meio de analises em elementos finitos. Uma Analise de Variancia (α=0.05) foi utilizada para interpretar os dados do pico de deformaçao equivalente no osso, do pico de tens.es equivalentes no parafuso do abutment, do deslocamento relativo osso-implante e do gap do abutment. A maior influ.ncia do tipo de conexao protetica e do platform-switching foi observado na tensao do parafuso e no gap do abutment. Por sua vez, o design do implante afetou consideravelmente as deformaçoes no osso e o deslocamento relativo entre o osso e o implante. Nao obstante, evitar a sobrecarga do implante e garantir uma alta estabilidade inicial sao os fatores mais importantes na previsibilidade de implantes imediatos com carga imediata
The aim of the present research work was to evaluate the influence of different connection type, platform switching and implant designs on the biomechanical environment of immediately placed implants. A CT-based model of an upper central incisor extraction socket was constructed. The immediately placed implants were evaluated by finite element analysis. An Analysis of Variance was used to interpret the data for the peak equivalent strain in the bone, peak Von Mises stress in the abutment screw, bone-to-implant relative displacement and abutment gap. The largest influence of the connection type and platformswitching was seen on the peak equivalent stress in the abutment screw and implant-abutment gap. On contrary, the implant design considerably affects the biomechanical environment of immediately placed implants. However, avoiding implant overloading and ensuring a high implant initial stability are the most important factors for the predictability of implants in this protocol
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Pessoa, Roberto Sales e. "Influência do tipo de conexão protética, do platform-switching e do designe do implante no ambiente biomecânico de implantes imediatos com carga imediata /." Araraquara : [s.n.], 2010. http://hdl.handle.net/11449/104182.
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Resumo: O objetivo do presente trabalho de pesquisa foi avaliar a influencia do tipo de conexao protetica, do platform-switching, e do design do implante no ambiente biomec.nico de implantes imediatos com carga imediata. Para tanto, um modelo de alveolo de extraçao de um incisivo central superior foi constru.do baseado em tomografia computadorizada. Implantes inseridos no alveolo de extra..o foram avaliados por meio de analises em elementos finitos. Uma Analise de Variancia (α=0.05) foi utilizada para interpretar os dados do pico de deformaçao equivalente no osso, do pico de tens.es equivalentes no parafuso do abutment, do deslocamento relativo osso-implante e do gap do abutment. A maior influ.ncia do tipo de conexao protetica e do platform-switching foi observado na tensao do parafuso e no gap do abutment. Por sua vez, o design do implante afetou consideravelmente as deformaçoes no osso e o deslocamento relativo entre o osso e o implante. Nao obstante, evitar a sobrecarga do implante e garantir uma alta estabilidade inicial sao os fatores mais importantes na previsibilidade de implantes imediatos com carga imediataAbstract: The aim of the present research work was to evaluate the influence of different connection type, platform switching and implant designs on the biomechanical environment of immediately placed implants. A CT-based model of an upper central incisor extraction socket was constructed. The immediately placed implants were evaluated by finite element analysis. An Analysis of Variance was used to interpret the data for the peak equivalent strain in the bone, peak Von Mises stress in the abutment screw, bone-to-implant relative displacement and abutment gap. The largest influence of the connection type and platformswitching was seen on the peak equivalent stress in the abutment screw and implant-abutment gap. On contrary, the implant design considerably affects the biomechanical environment of immediately placed implants. However, avoiding implant overloading and ensuring a high implant initial stability are the most important factors for the predictability of implants in this protocol
Orientador: Luis Geraldo Vaz
Coorientador: Elcio Marcantonio Junior
Coorientador: Sonia Aparecia Goulart de Oliveira
Banca: José Maurício dos Santos Reis Nunes
Banca: Rogério Margonar
Banca: Pedro Yoshito Noritomi
Banca: Flávio Domingues das Neves
Doutor
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Broccaioli, E. A. "CONNESSIONI IMPIANTO-ABUTMENT VALUTAZIONE DEL RIASSORBIMENTO OSSEO PERIMPLANTARE IN DUE SISTEMATICHE A CONFRONTO." Doctoral thesis, Università degli Studi di Milano, 2012. http://hdl.handle.net/2434/173984.
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Implant-abutment connection evaluation of bone loss for two different implants.
Introduction: Peri-implant bone resorption around implant-abutment connection induces dental Implant companies to improve quality production and implant design to better clinical outcome.
Moreover there is a growing interest in scientific community as it is shown by the greater and greater numbers of articles that treat thisargument.
Purpose: the aim of this study was to analyse perimplant bone loss and investigate the negative aspects that interfere with osseointegration process. Bone loss is due to biological, mechanical and traumatic causes.
Materials and Methods: We have analized two different implants
(produced by the same Company) that mostly differ from one another in
the implant-abutment connection. The first has an internal connection
and a coronal machined neck, the second has an external connection and
an all treated surface. Radiographs have been taken at baseline and after 4 years and have been compared. The results have been analyzed statistically.
Result: We found a mean bone loss of 1,359 mm and 0,739 mm for the external and internal connection respectively. There is a significant difference P < 0,0001.
We assume that micro-gap, micro-motion and stress distribution at the
connections of implants, as well as the biological width at the implant surface and the microbiological enviroment at the implant sulcus work all together sinergically and impair the result.
Conclusion: The implant-abutment connection influences the biomechanical and biological enviroment of perimplant bone. The external connection is followed by a significant reduction of crestal bone levels. However we think that more studies with larger samples are needed to confirm the findings obtained.
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Magnusson, Emelie. "FE analysis and design of the mechanical connection in an osseointegrated prosthesis system." Thesis, Linköpings universitet, Mekanik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-69402.
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In this master thesis the connection between the two major parts of an osseointegrated prosthesis system for lower limb amputees has been investigated by finite element (FE) analysis. The prosthesis system is developed by Integrum and the current design consists of a fixture, which is integrated in the residual bone, an abutment that penetrates the skin and an abutment screw that holds the parts together. The connection between the fixture and the abutment has a hexagonal section and a press-fit section that together form the connection. Due to wear and fracture problems it is desired to improve the connection. A tapered connection could be an alternative and three different taper angles, the effect of the length of the taper and the smoothness of the outer edge of a tapered fixture have been investigated. The results show that the taper has potential to function well and that a longer connection will give lower stresses in the system, but further investigations are needed.
Books on the topic "Implant connection"
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J, Doherty P., and European Society for Biomaterials, eds. Biomaterial-tissue interfaces: Proceedings of the Ninth European Conference on Biomaterials, Chester, U.K., September 9-11, 1991. Amsterdam: Elsevier, 1992.
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Regenerative medicine and biomaterials for the repair of connective tissues. Oxford: Woodhead Pub., 2010.
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Dix, Alan, Steve Gill, Devina Ramduny-Ellis, and Jo Hare. TouchIT. Oxford University PressOxford, 2022. http://dx.doi.org/10.1093/oso/9780198718581.001.0001.
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Abstract The physical world is increasingly filled with digital products to the extent that the boundaries of digital and physical reality become blurred. From mundane devices such as mobile phones and washing machines, to esoteric research including tangible computation and body implants, we continually bridge two worlds, literally touching buttons and dials and metaphorically touching the bits beyond. The connection between pure thought and abstract information is through solid keyboard and mouse, but likewise the material world of buildings, cars, and running shoes is suffused with computation through sensors, displays, and flashing LEDs. How do people understand this world and how can designers create usable hybrid physical–digital products? This book brings together experience from human–computer interaction and industrial design, exploring these themes under four main headings: human body and mind; objects and things; space; and computation and information. In considering each it looks at the underlying physical processes, our human understanding of them, and then the way these inform and are informed by digital design. The final part of the book draws together the theoretical and practical implications of this for design. This includes practical advice, potential tools, and philosophical underpinnings. Digital technology is fundamentally altering the world we live in but can only be truly understood in relation to the physical world we all inhabit. The most successful future products and policies will be those that take this rich digital/physical ecology seriously.
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Glannon, Walter. Neural Prosthetics. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198813910.001.0001.
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Neural prosthetics (neuroprostheses, neural prostheses) are devices or systems that influence the input and output of information in the brain. They modulate, bypass, supplement, or replace regions of the brain and its connections to the body that are damaged, dysfunctional, or lost from brain injury, congenital conditions, limb loss, or neurodegenerative disease. Neural prosthetics can generate, improve, or restore sensory, motor, and cognitive functions. Some prosthetics are implanted in the brain. Others are connected to it in brain–computer interfacing. This book describes auditory and visual prosthetics, deep brain and responsive neurostimulation, brain–computer interfaces, brain-to-brain interfaces, optogenetics, and memory prosthetics and discusses some of their neuroscientific and philosophical implications. The neuroscientific discussion focuses on how neural prosthetics can restore brain and bodily functions. The philosophical discussion focuses on how people with these prosthetics can benefit from or be harmed by them. It also focuses on how these devices and systems can lead to a better understanding of or change our attitudes about the brain–mind relation, identity, mental causation, and agency. The book considers the therapeutic, rehabilitative, and restorative potential of neural prosthetics in improving functional independence and quality of life for millions of people with disabling conditions.
Book chapters on the topic "Implant connection"
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Hanaoka, Marcia, Sergio Alexandre Gehrke, Fabio Mardegan, César Roberto Gennari, Silvio Taschieri, Massimo Del Fabbro, and Stefano Corbella. "Influence of Implant/Abutment Connection on Stress Distribution to Implant-Surrounding Bone: A Finite Element Analysis." In Journal of Prosthodontics on Dental Implants, 205–14. Hoboken, New Jersey: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119115397.ch23.
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Shafie, Hamid R., and Bryan A. White. "Different Implant-Abutment Connections." In Clinical and Laboratory Manual of Dental Implant Abutments, 33–46. Oxford, UK: John Wiley & Sons, Ltd, 2014. http://dx.doi.org/10.1002/9781118928547.ch4.
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Waguespack, Dennis E., and Brian C. Butler. "Implant naturalization: restoring osseointegrated dental implants with damaged platforms and connections." In Dental Implant Complications, 145–52. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119140474.ch7.
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Lemons, Jack E. "Studies of Modular Connections for Surgical Implant Devices." In Modularity and Tapers in Total Joint Replacement Devices, 379–95. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2015. http://dx.doi.org/10.1520/stp159120140119.
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Embery, G., R. J. Waddington, and K. S. Last. "The Interaction between Connective Tissues and Implant Materials." In Proceedings of the First International Conference on Interfaces in Medicine and Mechanics, 120–31. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-011-7477-0_12.
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Kang, Hyun-Guy. "Patient Case 22: Segmental Femur and Implant-Bone Connector." In Clinical Atlas of 3D Printing Bone Reconstruction, 271–86. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-2043-0_22.
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Kang, Hyun-Guy. "Patient Case 32: Radius & Ulna and Implant-Bone Connector." In Clinical Atlas of 3D Printing Bone Reconstruction, 409–19. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-2043-0_32.
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Albosefi, Abdalah, Matthew Finkelman, and Roya Zandparsa. "An in Vitro Comparison of Fracture Load of Zirconia Custom Abutments with Internal Connection and Different Angulations and Thickness: Part I." In Journal of Prosthodontics on Dental Implants, 215–20. Hoboken, New Jersey: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119115397.ch24.
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Kraft, S., W. Semper, K. Nelson, and Timo Krüger. "Analytical approach to determine the rotational freedom of dental implant-abutment connections." In IFMBE Proceedings, 1484–87. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-89208-3_352.
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Jasik, Anna, and Magdalena Jabłońska. "Mutual Connections Between Mechanical and Material Factors, and the Biological Processes of Implants Adaptation." In Advances in Bio-Mechanical Systems and Materials, 139–46. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-00479-2_11.
Full textConference papers on the topic "Implant connection"
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Trappey, Amy J. C., Charles V. Trappey, Hsin-Yi Peng, and Tong-Mei Wang. "Ontology-based dental implant connection patent analysis." In 2013 IEEE 17th International Conference on Computer Supported Cooperative Work in Design (CSCWD). IEEE, 2013. http://dx.doi.org/10.1109/cscwd.2013.6580972.
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Vlaisavljevich, Eli, Logan P. Janka, Keat G. Ong, and Rupak M. Rajachar. "Magnetoelastic Materials as Novel Bioactive Coatings for Bone Anchored Prostheses." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-206406.
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Enhanced fibroblast activity at the implant-soft tissue interface is a key concern to the long-term success of many implanted biomaterials. Uncontrolled fibrosis has been shown to dramatically decrease the stability, function, and lifespan of biomedical implants. Fibrosis, defined as the overgrowth of various tissues about the implant, is caused by the excess synthesis of extracellular matrix components, primarily collagen, and often leads to walling off and hardening (calcification) of tissues at the biomaterial interface (1). Fibrosis is currently a major deterrent to stable bone anchored prostheses. These bone anchored mounting systems are designed to surgically attach a prosthesis mounting post directly into a patient’s bone. The attached post protrudes from the bone through the overlying soft tissue of the amputated limb providing an external connection point for the prosthetic. Although the bone anchoring system dramatically improves prosthetic limb mechanical stability, uncontrolled fibrosis at the soft tissue-mounting post interface is a significant problem (2). The fibrosis caused from aberrant cellular growth leads to the formation of irregular skin folds that prevent proper sealing to the bone anchoring post and also serves as a site for opportunistic infection and failure of the prosthetic system.
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Xu, Ming, James Yang, Isador H. Lieberman, and Ram Haddas. "Comparison of Fatigue Behaviors of Spinal Implants Under Physiological Spinal Loads: A Finite Element Pilot Study." In ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/detc2017-67783.
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The fusion surgery is a standard treatment for scoliosis. Fatigue-related failure is one common cause for the fusion surgery implant. Due to the high cost of revision surgery, it is of clinical value to study the fatigue behaviors of the spinal implants under physiological spinal loads. In the literature, biomechanical tests and finite element (FE) methods have been used to study the fatigue of the spinal implants. Compared with biomechanical tests, FE analysis has the advantage of low cost and high efficiency. Due to the high computational cost, no FE study has been modeled the exact geometry of the pedicle screw (including the thread) in the screw-bone connection within the multi-level spine FE model. This study introduced a feasible FE-based method to predict the fatigue behaviors of the spinal implants with exact geometry of pedicle screw. One previously-validated FE spine model was utilized to provide physiological spinal loads and was bilaterally fused with pedicle screws and rods at L3-L4 spine levels. The exact geometry of the pedicle screw was simulated in this study for accurate stress prediction. The fused spine FE model was subjected to six loading directions (flexion/extension, left/right lateral bending, and left/right axial rotation). For each loading direction, a pure bending moment of 10 Nm was tested. First, FE analysis was performed for one loading cycle. Range of motion, maximum von Mises stress values of the spinal implants were recorded and compared for the six tested loading conditions. Then, based on the stress/strain history of the spinal implants for one loading cycle provided by the FE simulation, fatigue life cycles of the spinal implants were calculated using strain-based Smith-Watson-Topper equation. Flexion produced the largest range of motion at the adjacent level. Axial rotation produced the largest von Mises stress in the spinal implants. Except for lateral bending, the von Mises stress predicted in the screws fused at the superior vertebra was larger than that in the screws fused at inferior vertebra. The method introduced in this study will be used to study different screw fixation methods in the future work.
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Gomez, Mark A., and J. Marcus Hollis. "Evaluation of Spinal Arthrodesis Implant Designs: A Biomedicial-Legal Perspective." In ASME 2010 5th Frontiers in Biomedical Devices Conference. American Society of Mechanical Engineers, 2010. http://dx.doi.org/10.1115/biomed2010-32080.
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A successful spinal implant design requires that it perform consistently under a known set of loading conditions. Specifically, the loading conditions experienced in the activities of everyday living must be accounted for in both the design and testing of spinal arthrodesis implants. Knowledge of these loading conditions and, in particular, those which produce implant failure, must be addressed continuously during the design, testing and even during the actual clinical use of the implant. The goals of this presentation are: 1) to provide an understanding of typical spinal implant test procedures and, 2) to understand how to utilize real world failure data to optimize the test loading conditions which would predict failure of a spinal implant. For the first goal, ASTM standards for testing of spinal implants will be described and, for the second goal, data from a clinical case with failure of a pedicle screw connector will be utilized. This will include data from the patient’s medical records, structural and material properties of the implant material, and accident reconstruction analyses. The combined data will provide a most probable cause of implant failure and failure load.
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McGilvray, Kirk, Hilmi Volkan Demir, Emre Unal, and Christian Puttlitz. "A Novel Bio-Microelectromechanical System for In Vivo Diagnostic Monitoring of Fracture Healing." In ASME 2013 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/sbc2013-14139.
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The ability to detect a normal from aberrant bone healing cascade during the acute fracture fixation period (1–3 weeks post trauma) is critically important to insure a favorable clinical outcome for many complex fracture cases. Radiographic evaluations do not have the inherent fidelity to make qualitative predictions during the acute healing phase. Early detection of an atypical healing profile would allow for revision strategies to be employed without the need for expensive and undesirable follow-up surgeries. In an effort to address the critical need to diagnose the course of bone fracture healing in the vitally important early healing phase, our research group has developed a radio frequency (RF) strain sensor that takes advantages of the recent advances in meta-materials and micro-electo-mechanical systems (MEMS) technology. Our MEMS sensor is biocompatible (bioMEMS), inductively powered and monitors the surface strains on implanted hardware [1, 2]. Another novel feature of this new sensor is that it does not require an internal-external physical connection to sense and transmit in vivo biological data. The essence of the sensor’s design is that straining the integrated RF bioMEMS circuit results in a shift in its resonant frequency (ResF). Through telemetric detection of this ResF shift, it is possible to longitudinally monitor the temporal changes in hardware strain. It is well understood that that as proper fracture healing progresses (i.e. increasingly stable tissue(s) stabilizing the fracture sight) that the load/strain born by orthopaedic implant diminishes. Therefore, telemetric measurements of our bioMEMS system (i.e. hardware load/strain) provide direct insight into the degree of fracture stabilization and healing.
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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.
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de Vries, Charlotte M., and Matthew B. Parkinson. "Modeling the Variability of Glenoid Geometry in Intact Shoulders." In ASME 2016 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/detc2016-59934.
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The objective of this research is to model the geometric variability of the glenoid (the “socket” component of the “ball and socket” connection of the shoulder joint) of the scapula. The model must capture the observed variability with sufficient resolution such that it informs operative and design decisions. This required the quantification of variability in landmark locations and relevant bone geometry. Landmarks were placed on the existing glenoid meshes, such that they provided enough information to represent the geometry, while being consistent across each glenoid. Additionally, the surface geometry of the glenoid vault was modeled. This required the application of existing mathematical and statistical modeling approaches, including geometric fitting, radial basis functions, and principal component analysis. The landmark identification process represented the glenoid in new manner. The work was validated against existing approaches and CT scans from 42 patients. A range of information on shoulder geometries can assist with preoperative planning, as well as implant design, for Total Shoulder Arthroplasty (TSA). Principal component analysis (PCA) was used to quantify the variability of shape across the glenoid landmarks, and synthesize new glenoid models. The process of creation of these shoulder geometries may possibly be useful for the study of other joints. The models created will help surgeons and engineers to understand the effects of osteoarthritis on bone geometry, as well as the range of variability present in healthy shoulders.
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Chui, Benjamin W., Thomas W. Kenny, H. Jonathon Mamin, Bruce D. Terris, and Daniel Rugar. "A Novel Dual-Axial AFM Cantilever With Independent Piezoresistive Sensors for Simultaneous Detection of Lateral and Vertical Forces." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0939.
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Abstract This paper describes a novel dual-axial AFM cantilever with independent piezoresistive sensors for simultaneous detection of lateral and vertical forces. The cantilever consists of a flat, triangular probe with a vertical direction of compliance, implanted with a piezoresistive layer to form a vertical deflection sensor. This probe is connected to the base by tall, narrow “ribs” that give the structure lateral compliance. Embedded on the side-walls of some of the ribs are a second set of piezoresistors that form a lateral deflection sensor. A special ion implant at approximately 45 degrees to the vertical is used to create the piezoresistive sensors and electrical connections. Both the vertical and the lateral deflection sensors exhibit measured piezoresistive sensitivities ΔR/R on the order of 5 × 10−7 per Å. The cantilever was successfully used to obtain AFM images of a known sample, yielding correlated z-signal and x-signal images of the sample topography.
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Ishak, Muhammad Ikman, Aisyah Ahmad Shafi, M. U. Rosli, C. Y. Khor, M. S. Zakaria, Wan Mohd Faizal Wan Abd Rahim, and Mohd Riduan Jamalludin. "Biomechanical evaluation of different abutment-implant connections – A nonlinear finite element analysis." In 3RD ELECTRONIC AND GREEN MATERIALS INTERNATIONAL CONFERENCE 2017 (EGM 2017). Author(s), 2017. http://dx.doi.org/10.1063/1.5002258.
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Donaldson, Finn E., and James C. Coburn. "Stochastic Simulation of Modular Connections in Total Hip Replacement." In ASME 2013 Conference on Frontiers in Medical Devices: Applications of Computer Modeling and Simulation. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/fmd2013-16078.
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Several modern Total Hip Arthroplasty (THA) implants have been associated with increased release of metallic debris through combined mechanical fretting wear and chemical corrosion. These particles can lead to painful Adverse Reaction to Metallic Debris, often requiring early revision [1]. While much research has focused on improving the performance of bearing surfaces, the key parameters driving release of metallic debris at modular junctions remains unclear.
Reports on the topic "Implant connection"
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Vélez, Rómulo Andrés, Alejandro Fereño Caceres, Wilson Daniel Bravo Torres, Daniela Astudillo Rubio, and Jacinto José Alvarado Cordero. Primary stability with the osseodensification drilling technique for dental implants in low density bone in humans: a systematic review. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, September 2022. http://dx.doi.org/10.37766/inplasy2022.9.0066.
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Review question / Objective: - Does the osseodensification drilling technique increase primary stability in low-density bone? - The aim of the present investigation was to evaluate primary stability in dental implants in people with low density bone using the osseodensification technique. Condition being studied: The replacement of missing teeth through dental implants is currently the most practiced in dental clinics. The main criterion for determining the success of an implant is osseointegration, which is a direct structural and functional connection between vital bone and the prosthetic load-bearing surface of an implant. In the same way, primary stability must be obtained for a good lasting clinical result of the implant and to achieve this purpose, the bone density must be evaluated where the dental implant is to be placed. Salah Huwais in 2013 introduced a new osteotomy procedure (Oseodensification) for site preparation without removal and bone preservation. The Osseodensification process produces an autograft layer around the implant with the osteotomy surface, the autologous bone comes into contact through an endosteal device that accelerates osseointegration due to the nucleation of osteoblasts in the instrumented bone adjacent to the implant and has a greater primary stability due to contact between the device and the bone.
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SAINI, RAVINDER, AbdulKhaliq Alshadid, and Lujain Aldosari. Investigation on the application of artificial intelligence in prosthodontics. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, December 2022. http://dx.doi.org/10.37766/inplasy2022.12.0096.
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Review question / Objective: 1. Which artificial intelligence techniques are practiced in dentistry? 2. How AI is improving the diagnosis, clinical decision making, and outcome of dental treatment? 3. What are the current clinical applications and diagnostic performance of AI in the field of prosthodontics? Condition being studied: Procedures for desktop designing and fabrication Computer-aided design (CAD/CAM) in particular have made their way into routine healthcare and laboratory practice.Based on flat imagery, artificial intelligence may also be utilized to forecast the debonding of dental repairs. Dental arches in detachable prosthodontics may be categorized using Convolutional neural networks (CNN). By properly positioning the teeth, machine learning in CAD/CAM software can reestablish healthy inter-maxillary connections. AI may assist with accurate color matching in challenging cosmetic scenarios that include a single central incisor or many front teeth. Intraoral detectors can identify implant placements in implant prosthodontics and instantly input them into CAD software. The design and execution of dental implants could potentially be improved by utilizing AI.