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Oliveira, Simone Helena Gonçalves, Lilian Costa Anami, Tânia Mara Silva, Rodrigo Simões Oliveira, Ana Luisa Leme Simões Sales, and Alberto Alvarenga Oliveira. "Intracanal reinforcement in anterior teeth to prevent fractures." Brazilian Dental Science 17, no. 3 (2014): 98. http://dx.doi.org/10.14295/bds.2014.v17i3.973.
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<p>The fracture of anterior teeth after root canal treatment is a real and multifactorial possibility. This is due to the weakening of the root due to lost of the remaining tooth added to oblique-existing occlusal forces. This fracture in addition to causing a masticatory dysfunction, will also influence the aesthetics of the patient. In prevention, one of the treatments used and widely accepted, is the use of intraradicular. These can be made of metal, carbon fiber, fiberglass and ceramics. The pins of metal and carbon fiber are very efficient but don't favor the aesthetic, as the pins fiberglass and ceramics are very resistant and favor aesthetics. Reinforcing with these biomaterials is beneficial and leads to a favorable prognosis. This study shows a case which the building could have prevented the intracanal fracture of an devitalized upper anterior tooth and makes a brief discussion about the available options for this type of rehabilitation. The use of reinforced glass fiber as reinforcement of the structure of devitalized teeth is indicated for the prevention of dental fractures. Cast ceramic cores are indicated for the insufficient coronary remaining to support the filling material.<strong></strong></p>
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Nikolaychuk, Evgeny A., Andrei K. Iordanishvili, and Evgeny Kh Barinov. "Case of dental restoration by materials not permitted for use in medical practice." Russian Journal of Forensic Medicine 7, no. 1 (2021): 48–50. http://dx.doi.org/10.17816/fm338.
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Introduction: In recent years, endodontic dental treatment associated with periodontal inflammation in the provision of emergency and planned dental care is not provided with the appropriate standard and quality. Clinical case: Clinical observation is done to a patient suffering from exacerbation of chronic periodontitis, who underwent restoration of 2.6 teeth with light-cured filling material 15 years ago, and intraroot pins of which are made of materials that are not approved for medical practice use. Conclusion: The use of inappropriate material in medical practice for tooth restoration gives the patient the right to seek for material and moral compensation for bodily harm.
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Nesterov, Alexander M., Mukatdes I. Sadykov, and Vladislav V. Matrosov. "Analysis of orthopedic treatment of patients with stump pins inserts with artificial crown in significant destruction of the clinical dental crown: the data of archival materials of the dental clinic." Aspirantskiy Vestnik Povolzhiya 20, no. 1-2 (2020): 96–101. http://dx.doi.org/10.17816/2072-2354.2020.20.1.96-101.
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The aim of the article is to analyze the orthopedic treatment of patients with a lack of clinical tooth crowns by means of stump pin inserts with an artificial crown presented in the archival materials from the dental clinic of Samara.
 Research methods. Health records of dental patients and the orthopaedic work orders of the Dental Clinic No. 2 of the city of Samara over the period of 20152019 were analyzed.
 Results. Of the total number of patients (142,394 people), 5370 patients underwent a stump pin insert to restore a missing tooth crown. A total of 5802 pin stump tabs were made for these patients. 524 patients (10.09%) had complications. Most complications were observed in the lateral group of patients with prosthetic teeth (62.18%). Discementation of crowns from stump pin inserts was the main complication (53.32%). Ceramic crown chipping from metal-ceramic crowns was observed in 6.46% of all complications.
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Galo, Rodrigo, Marta Maria Martins Giamatei Contente, and Maria Cristina Borsatto. "Wear of two pit and fissure sealants in contact with primary teeth." European Journal of Dentistry 08, no. 02 (2014): 241–48. http://dx.doi.org/10.4103/1305-7456.130619.
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ABSTRACT Objectives: Wear simulations may provide an indication of the clinical performance of pit-and-fissure sealants when associated with primary teeth as counterbody, restricting the involved variables. The aim of this study was to evaluate wear of dental materials used as pit-and-fissure sealants in contact with primary teeth. Materials and Methods: A resinous sealant (Fluroshield®) and a resin-modified glass ionomer cement (Vitremer®) were selected in a post-plate design, using as counterbody primary tooth pins (4 × 4 × 2 mm) at 3 and 10 N vertical load, 1 Hz frequency, 900 wear cycles in artificial saliva (n = 15). Attrition coefficient values were obtained and the material and primary tooth volumes were analyzed. Data were analyzed statistically by ANOVA and Duncan's test (P < 0.05). Results: Fluroshield® presented the highest attrition coefficient values for the 3 N but these values decreased significantly for the 10 N load. The means for volume loss (3 mm) of the different samples after the wear test were not statistically different for the materials. The volume loss values for the primary teeth were statistically different and there was an increase in volume loss with the increase of the load applied in the wear tests. Conclusions: Differences were also observed with regard to the surface deformation characteristics. The wear rates of primary tooth enamel vary according to the type of material and the load applied during mastication.
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Smith, Margaret A., Sangeeta Rao, and Jennifer E. Rawlinson. "Dental Pathology of the Domestic Pig (Sus Scrofa Domesticus)." Journal of Veterinary Dentistry 37, no. 4 (2020): 192–200. http://dx.doi.org/10.1177/0898756421989097.
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Antemortem domestic pig (Sus scrofa domesticus) dental pathology literature is sparse. This observational descriptive study evaluated 23 client-owned pigs that while sedated/anesthetized for routine annual care had intraoral dental radiographs and an oral examination performed. Age, gender, weight, and breed for each pig were recorded. Oral examination and radiographic findings were reviewed to create a comprehensive list of dental abnormalities identified. Descriptive statistics were performed to summarize the data. The study population included 14 castrated males and 20 Vietnamese pot-bellied mini-pigs. The median age was 3 years (range 2-12 years), and the median weight was 39 kg (range 11-140 kg). The most common finding was missing teeth (21/23 pigs); the first premolar tooth was the most likely to be absent (64/106 missing teeth). Periodontal disease was common (20/23 pigs). Advanced stages primarily affected the first molar teeth frequently in the form of a mucogingival defect. Supernumerary roots were discovered on the maxillary canine teeth in female pigs only (10/25 teeth with supernumerary roots). The most common persistent deciduous tooth was the maxillary second incisor (15/19 persistent deciduous teeth). Non-age or gender related open apices were most likely associated with mandibular first and second incisor teeth (26/96 teeth with open apices). Tooth resorption was also identified (7/23 pigs). The study findings prove that pet pigs commonly have dental pathology; therefore, thorough oral examinations with intraoral radiographs should be included in porcine routine health care regimens.
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Kuo, Tzong-Fu, Shi-Yuan Sheu, Ching-Chuan Jiang, et al. "TOOTH REGENERATION WITH DENTAL STEM CELL RESEARCH IN MINIATURE PIG MODEL." Taiwan Veterinary Journal 41, no. 03 (2015): 197–203. http://dx.doi.org/10.1142/s1682648515500109.
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To develop a cell-based approach to tooth regeneration, we isolated dental stem cells from tooth buds of mini pigs and culture-expanded them for about three weeks. Flow cytometry revealed that the majority of the proliferating cells were positive for stem cell surface markers, including CD105, CD29, CD44, CD71. These dental stem cells were then seeded in biodegradable agarose gel for autograft in various areas of the jaw bone. Mini pigs with tooth buds removed without transplantation of dental stem cells served as control. After one year, well differentiated tooth crown and root sheath were formed in mini pigs in the experimental group. The tooth formed by dental stem cells transplanted in alveolar bone was similar in size to original tooth crown (approximately 2 cm × 2 cm × 2 cm). The teeth formed by dental stem cells transplanted under the roots of the anterior teeth and in the cortical bone area were smaller. In the control group, the space where the tooth bud was extracted without cell transplantation was seen to be closed by forward movement of the posterior teeth. Histological analysis showed the structures of enamel, dentin and pulp in the regenerated tooth crown. Immunohistochemical analysis of amelogenin, type I collagen and bone sialoprotein confirmed enamel and dentin formation. Enamel and dentin structures on the regenerated tooth were also identified using scanning electron microscopy. These findings demonstrate a successful model of tooth regeneration from dental stem cells in mini pigs. In addition, local environment and available space also significantly affect the extent of tissue regeneration. Our study demonstrates the feasibility of using dental stem cells for tooth regeneration in clinical applications.
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Zhang, W., B. Vazquez, D. Oreadi, and P. C. Yelick. "Decellularized Tooth Bud Scaffolds for Tooth Regeneration." Journal of Dental Research 96, no. 5 (2017): 516–23. http://dx.doi.org/10.1177/0022034516689082.
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Whole tooth regeneration approaches currently are limited by our inability to bioengineer full-sized, living replacement teeth. Recently, decellularized organ scaffolds have shown promise for applications in regenerative medicine by providing a natural extracellular matrix environment that promotes cell attachment and tissue-specific differentiation leading to full-sized organ regeneration. We hypothesize that decellularized tooth buds (dTBs) created from unerupted porcine tooth buds (TBs) can be used to guide reseeded dental cell differentiation to form whole bioengineered teeth, thereby providing a potential off-the-shelf scaffold for whole tooth regeneration. Porcine TBs were harvested from discarded 6-mo-old pig jaws, and decellularized by successive sodium dodecyl sulfate/Triton-X cycles. Four types of replicate implants were used in this study: 1) acellular dTBs; 2) recellularized dTBs seeded with porcine dental epithelial cells, human dental pulp cells, and human umbilical vein endothelial cells (recell-dTBs); 3) dTBs seeded with bone morphogenetic protein (BMP)-2 (dTB-BMPs); and 4) freshly isolated nondecellularized natural TBs (nTBs). Replicate samples were implanted into the mandibles of host Yucatan mini-pigs and grown for 3 or 6 mo. Harvested mandibles with implanted TB constructs were fixed in formalin, decalcified, embedded in paraffin, sectioned, and analyzed via histological methods. Micro-computed tomography (CT) analysis was performed on harvested 6-mo samples prior to decalcification. All harvested constructs exhibited a high degree of cellularity. Significant production of organized dentin and enamel-like tissues was observed in dTB-recell and nTB implants, but not in dTB or dTB-BMP implants. Micro-CT analyses of 6-mo implants showed the formation of organized, bioengineered teeth of comparable size to natural teeth. To our knowledge, these results are the first to describe the potential use of dTBs for functional whole tooth regeneration.
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Clarke, CMH, RM Dzieciolowski, D. Batcheler, and CM Frampton. "A Comparison of Tooth Eruption and Wear and Dental Cementum Techniques in Age Determination of New Zealand Feral Pigs." Wildlife Research 19, no. 6 (1992): 769. http://dx.doi.org/10.1071/wr9920769.
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This study evaluates dental ageing techniques for feral pigs in northern South I., New Zealand. Ages of pigs were estimated by three techniques: tooth eruption and replacement on criteria calibrated from pen-reared American-bred European wild pigs; tooth eruption, development, and wear calibrated from known-age feral pigs from the study area; and annular growth in cementum of molariform teeth. All age estimations showed strong agreement with each other and with known ages. The eruption and replacement criteria were most useful for ageing pigs less than 30 months old, whereas the other two criteria were more suited to ageing pigs more than 30 months old. All permanent teeth of New Zealand feral pigs erupted 1-2 months earlier than in European and Malayan wild pigs, and permanent premolars erupted up to 4 months earlier than in Japanese wild pigs. Earlier eruption may reflect early onset of maturity in New Zealand pigs. The clarity of annuli observed varied between animals, but generally increased with age. Pigs from unforested habitat had a higher percentage of clearly defined annuli than those from forested habitat. This may be explained by a climatic or dietary factor.
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Aborisade, A., J. Abdurrazaq, and J. Adeoye. "Concurrent presentation of dental lamina cysts of the new born and natal tooth in a child: a case report and literature review." African Journal of Oral Health 9, no. 1 (2019): 1–4. http://dx.doi.org/10.4314/ajoh.v9i1.1.
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Dental lamina cysts and natal/neonatal teeth are rare findings in a neonate with the dental lamina cysts presenting as white or pink small nodules, often multiple, approximately 1 to 3mm in diameter. They are usually located on the alveolar mucosa of both maxilla and mandible and also on the midpalatine raphe; the whitish colored lamina cysts found on the alveolar mucosa can be confused clinically with neonatal teeth. Neonatal teeth are teeth found in infants within the first 30 days of life, and they present a social stigma to the parent. They have been reported to be a component of the full complement of teeth in 90-95% of cases. Apart from the social stigmata, they can also induce trauma to surrounding soft tissues and / or to the mother’s breast (Riga-Fede phenomenon). While the dental lamina cysts usually resolve spontaneously within few weeks to months, there are indications that might preclude extraction of a natal/neonatal tooth.Keywords: Dental lamina cyst, Epstein’s pearls, Mucosal cyst, natal/neonatal tooth
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PAPADIMITRIOU (Σ. ΠΑΠΑΔΗΜΗΤΡΙΟΥ), S., A. THOMAS (Α. ΘΩΜΑΣ), and M. KOUKI (Μ. ΚΟΥΚΗ). "Dental problems in rabbits and rodents." Journal of the Hellenic Veterinary Medical Society 59, no. 3 (2017): 225. http://dx.doi.org/10.12681/jhvms.14960.
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As the number of pet rabbits and rodents has raised lately, veterinarians have to cope with various medical conditions that affect them and especially those concerning their teeth in everyday practice. Rabbits', guinea pigs and chinchillas whole dentition and the incisors of the rest of the rodents are known as elodont teeth. Malocclusion, which is the most common dental condition seen in those animals occurs due to a combination of several factors and inappropriate diets. The owners frequently fail to recognize their pets' dental disease in time. Consequently, when they are finally presented to the vet, their condition is difficult to be treated and their life is in danger. The examination of the oral cavity should preferably be made under general anaesthesia. Radiological assessment is also essential in order to acquire valuable information about the teeth, roots and facial bones. As mentioned before, malocclusion is the most common dental problem that rabbits and small rodents experience whereas cheekteeth malocclusion is the most frequently recognized problem in guinea pigs and chinchillas. The common factors that contribute are: genetic predisposition (prognathism or brachygnathism), trauma and metabolic disorders. The symptoms vary from difficulty in mastication, bad breath, lesions of the tongue and oral mucosa to facial swelling, abscesses, fistulisation, ocular disease etc. Usually there are also symptoms regarding the animal's general health such as lack of appetite, emaciation and alternation of the feaces' composition. Treatment is both surgical and pharmaceutical. Occlusal equilibration may be accomplished by burring. If this is not possible, the extraction of all the incisors is recommended. In case of an abscess, debridement and extraction of the responsible tooth (usually affecting cheek teeth) is advised. Moreover, antibiotics and analgesics-antinflammatory drugs are of great help. The selection of the appropriate antibiotic should be based on aerobic and anaerobic culture and sensitivity, especially in case of an abscess. The most common antibiotics prescribed are enrofloxacin, Oxytetracycline, doxycycline, amicasin and metronidazole. The most common analgesics are opioids (e.g. fentanyl, buprenorphine, butorphanol) and NSAIDs (e.g. carprofen, meloxicam). Small mamals who are suffering from dental disease have to be treated very cautiously because of their being sensitive by nature. Especially rabbits and guinea pigs are very sensitive to the protracted loss of appetite. The preanaesthetic management is also critical. The complete blood count and serum biochemical analysis, especially in dehydrated and undernourished patients is imperative to be measured, as the iv administration of normal saline or dextrose serum and electrolytes is often needed. There is a positive correlation between feeding the animals on balanced diets (especially in calcium) and avoidance of dental problems. Therefore, prevention could be managed via the combination of appropriate diets and proper advising of the owners. The diet should consist of hay, straws and small quantities of cereals. The veterinarian should inform the owners about proper management of their pet, feeding and periodical examinations that should be done in order to prevent these pathological conditions.
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Nithya karpagam G, Bhagya Lakshmi T, and Dinesh Prabhu. "Radiographic evaluation of permanent second molar development based on nollas stage of tooth development in 9-11-year-old male children." International Journal of Research in Pharmaceutical Sciences 11, SPL3 (2020): 469–74. http://dx.doi.org/10.26452/ijrps.v11ispl3.2968.
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The aim of this study is to radiographically evaluate the second molar development based on the NOLLAS stage of tooth development in 9-11-year-old male children. For this, a total of 400 orthopantomography (OPG) images were collected from the database record of Saveetha dental college. Of these 40 OPGs were selected based on the age group between 9 to 11 years old male children. The dental age of the 2nd molar was calculated based on the NOLLAS loss stage of tooth development. After data collection, statistical analysis was done in the SPSS software. Among the study population, 33.90% were nine years old, 33.90% was ten years old, and 32.20% were 11 years old. Considering the distribution of teeth assessed majority were lower left second molar - 37 (32.20%) and least were upper left second molar-27(16.95%). Majority of the teeth attained maximum development at stage 9 (pink)-25.42%, least maturation assessed at stage 7-6.78%. The association between nollas stage and age was statistically significant (P-value of 0.000, p < 0.05). The association between nollas stage and tooth number was statistically not significant (P value of 0.106, p > 0.05). Majority of the children in the age group of 9 years had 'crown almost completed' in second molar (Stage 5), majority of 10-year-old children had 'two-third root completed' in second molar (Stage 8) and majority of 11-year-old children had ' root completed with open apex' in second molar (Stage 9).
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Bains, Rhythm, Aseem P. Tikku, and Promila Verma. "Occurrence of internal root resorption defects in anterior teeth with a history of concussion injury: A cross-sectional study among select adult North Indian dental patients." Asian Journal of Oral Health and Allied Sciences 10 (August 17, 2020): 7. http://dx.doi.org/10.25259/ajohas_5_2020.
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Objectives: The aim of this study was to assess the frequency of internal resorption (IR) defects in select adult North Indian population with a history of concussion injury to their anterior teeth. Material and Methods: The study population consisted of patients reporting with a history of concussion injury to their anterior teeth. At least two intraoral periapical radiographs, one at central and other at a 20° horizontal angulation, were taken for each of the affected teeth to check for any IR defect. The radiographs were inspected after placing them over a viewing box using magnifying glasses. Percentage of IR defects and their occurrence on the basis of tooth type, duration of trauma, gender, and side was assessed. Results: A total of 1507 patients reported with a history of a traumatic dental injury (TDI) to their anterior teeth. About 37.1% (560/1507) patients and 602 teeth with TDI had a history concussion injury. The percentage of patients with concussion injuries resulting in IR defect was 3.3% (19/560), and the percentage of teeth with IR defect was 3.16% (19/602). About 68.42% (13/19) were in males, and 31.58% (6/19) were in females; however, the difference was not statistically significant (χ2 = 1.05, P = 0.590). Most of the patients reported with a history of TDI within 0–5 years back, and the median age at the time of presentation was 20 years. Maxillary left central incisor was most affected, 4.84% (9/186) followed by maxillary right central incisor 3.5% (7/200) mandibular left lateral incisor 3.85% (1/26), mandibular left central incisor 3.57% (1/28), and maxillary lateral incisor 1.52% (1/66). Out of the 19 IR defects, 15 (78.9%) were located in the root, four were located coronally (21.05%), out of which 2 had a pink-colored crown. Conclusion: Silent injuries such as concussion and subsequent IR can potentially weaken the tooth; therefore, follow-up of patients with a history of TDIs is vital to rule out any developing but obscure resorptive defects.
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Popovic-Bajic, Marijana, Vesna Danilovic, Branislav Prokic, Bogomir Prokic, Milica Manojlovic, and Slavoljub Zivkovic. "Histological effects of enamel matrix derivative on exposed dental pulp." Srpski arhiv za celokupno lekarstvo 143, no. 7-8 (2015): 397–403. http://dx.doi.org/10.2298/sarh1508397p.
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Introduction. Direct pulp capping procedure is a therapeutic application of a drug on exposed tooth pulp in order to ensure the closure of the pulp chamber and to allow the healing process to take place. Objective. The aim of this study was to examine the histological effects of Emdogain? on exposed tooth pulp of a Vietnamese pig (Sus scrofa verus). Methods. The study comprised 20 teeth of a Vietnamese pig. After class V preparation on the buccal surfaces of incisors, canines and first premolars, pulp was exposed. In the experimental group, the perforations were capped with Emdogain? (Straumann, Basel, Switzerland), while in the control group pulp capping was performed with MTA? (Dentsply Tulsa Dental, Johnson City, TN, USA). All cavities were restored with glass-ionomer cement (GC Fuji VIII, GC Corporation, Tokyo, Japan). The observational period was 28 days, after which the animal was sacrificed and histological preparations were made. A light microscope was used to analyze dentin bridge formation, tissue reorganization and inflammation, and the presence of bacteria in the pulp. Results. The formation of dentin bridge was observed in the experimental and control groups. Inflammation of the pulp was mild to moderate in both groups. Angiogenesis and many odontoblast-like cells, responsible for dentin bridge formation, were observed. Necrosis was not observed in any case, nor were bacteria present in the pulp. Conclusion. Histological analysis indicated a favorable therapeutic effect of Emdogain? Gel in direct pulp capping of Vietnamese pigs. Pulp reaction was similar to that of MTA?.
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Winkler, Daniela E., Thomas Tütken, Ellen Schulz-Kornas, et al. "Shape, size, and quantity of ingested external abrasives influence dental microwear texture formation in guinea pigs." Proceedings of the National Academy of Sciences 117, no. 36 (2020): 22264–73. http://dx.doi.org/10.1073/pnas.2008149117.
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Food processing wears down teeth, thus affecting tooth functionality and evolutionary success. Other than intrinsic silica phytoliths, extrinsic mineral dust/grit adhering to plants causes tooth wear in mammalian herbivores. Dental microwear texture analysis (DMTA) is widely applied to infer diet from microscopic dental wear traces. The relationship between external abrasives and dental microwear texture (DMT) formation remains elusive. Feeding experiments with sheep have shown negligible effects of dust-laden grass and browse, suggesting that intrinsic properties of plants are more important. Here, we explore the effect of clay- to sand-sized mineral abrasives (quartz, volcanic ash, loess, kaolin) on DMT in a controlled feeding experiment with guinea pigs. By adding 1, 4, 5, or 8% mineral abrasives to a pelleted base diet, we test for the effect of particle size, shape, and amount on DMT. Wear by fine-grained quartz (>5/<50 µm), loess, and kaolin is not significantly different from the abrasive-free control diet. Fine silt-sized quartz (∼5 µm) results in higher surface anisotropy and lower roughness (polishing effect). Coarse-grained volcanic ash leads to significantly higher complexity, while fine sands (130 to 166 µm) result in significantly higher roughness. Complexity and roughness values exceed those from feeding experiments with guinea pigs who received plants with different phytolith content. Our results highlight that large (>95-µm) external silicate abrasives lead to distinct microscopic wear with higher roughness and complexity than caused by mineral abrasive-free herbivorous diets. Hence, high loads of mineral dust and grit in natural diets might be identified by DMTA, also in the fossil record.
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Kallistová, Anna, Roman Skála, Ivan Horáček, Nobuyoshi Miyajima, and Radana Malíková. "Influence of sample preparation on the microstructure of tooth enamel apatite." Journal of Applied Crystallography 48, no. 3 (2015): 763–68. http://dx.doi.org/10.1107/s1600576715005208.
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X-ray powder diffraction and transmission electron microscopy are widely used for determination of the basic characteristics of the biological apatite structure. Many different techniques have been adopted for separation of the enamel part of the tooth for use in these analytical methods, but their influence on the sample itself has not yet been studied. In this paper, six different preparation techniques have been applied on pigs' teeth to see their effect on the microstructure of dental hydroxyapatite. Although the only inorganic component of the tooth is the hydroxyapatite, new phases, such as calcite, aragonite, calcium hydrogen phosphate and calcium carbonate hydroxide, appeared when a drilling technique or deproteination of the sample was used. In addition, the crystallite size (especially in thec-axis direction) varies within a wide range (330–700 Å) depending on the preparation technique. Thus, the results indicate a strong effect of the enamel separation on the phase composition and crystallite size. The method providing results most consistent with previous studies is manual disintegration.
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Martin, Louise F., Daniela Winkler, Thomas Tütken, et al. "The way wear goes: phytolith-based wear on the dentine–enamel system in guinea pigs ( Cavia porcellus )." Proceedings of the Royal Society B: Biological Sciences 286, no. 1912 (2019): 20191921. http://dx.doi.org/10.1098/rspb.2019.1921.
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The effect of phytoliths on tooth wear and function has been contested in studies of animal–plant interactions. For herbivores whose occlusal chewing surface consists of enamel ridges and dentine tissue, the phytoliths might particularly erode the softer dentine, exposing the enamel ridges to different occlusal forces and thus contributing to enamel wear. To test this hypothesis, we fed guinea pigs ( Cavia porcellus ; n = 36 in six groups) for three weeks exclusively on dry or fresh forage of low (lucerne), moderate (fresh timothy grass) or very high (bamboo leaves) silica content representing corresponding levels of phytoliths. We quantified the effect of these treatments with measurements from micro-computed tomography scans. Tooth height indicated extreme wear due to the bamboo diet that apparently brought maxillary incisors and molars close to the minimum required for functionality. There were negative relationships between a cheek tooth's height and the depth of its dentine basin, corroborating the hypothesis that dentine erosion plays an important role in herbivore tooth wear. In spite of lower body mass, bamboo-fed animals paradoxically had longer cheek tooth rows and larger occlusal surfaces. Because ever-growing teeth can only change in shape from the base upwards, this is a strong indication that failure to compensate for wear by dental height-growth additionally triggered general expansive growth of the tooth bases. The results suggest that enamel wear may intensify after enamel has been exposed due to a faster wear of the surrounding dentine tissue (and not the other way around), and illustrate a surprising plasticity in the reactivity of this rodent's system that adjusts tooth growth to wear.
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Earar, Kamel, Ioan Sirbu, Ctristian Onisor, and Elena Luca. "Oral Rehabilitation on Implants and Introduction of Pathogenic Mechanisms in Relation to Oral Implants - Sugar Diabetes." Revista de Chimie 70, no. 10 (2019): 3750–52. http://dx.doi.org/10.37358/rc.19.10.7639.
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Dental implants are made of medical titanium and perfectly fit into human bone tissue; the dental implant can last a lifetime. Not beeing living organic structures, there are no nerve endings, neither at the implant level nor at the artificial crown level. The use of quality implants by an experienced implantologist, assisted by advanced technology, transforms the treatment with dental implants into the medical-surgical act with the highest success rate among dental and even medical treatments.Through the complete replacement of the tooth, including the root, can artificially reproduce the function of the natural tooth, with a strong and stable base. The implant crown, made of aesthetic materials (porcelain, zirconium) and anchored to it by means of the prosthetic abutment, will be surrounded by a healthy and aesthetic gum. Especially if the prosthetic abutment (the connecting element between the implant itself and the artificial crown) will be made of zirconium - natural light will cross ceramic layers, similar to enamel and dentine, offering a white of envy and glitter to the smile. Around the porcelain crowns (whole ceramics or zirconia ceramics) the gingiva will conform healthily, without the slightest sign of inflammation. These elements, the white of the teeth and the pink of the gums define the concept of dental aesthetics. The main problems that diabetic patients may encounter, are gingival inflammation and periodontal disease, dental mobility and tooth loss. When a dental implant is influenced by the type of diabetes, its failure rate is higher in patients with type 1 diabetes than in patients with type 2 diabetes. The study included a number of 56 patients, who presented themselves for performing an implant. Of these, 7 patients did not perform an implant. Diabetes mellitus defines a chronic metabolic disorder, which may have multiple etiopathogenesis, characterized by changes in carbohydrate, lipid and protein metabolism. Stability of the implant in the bone, immediately after implantation is crucial for the success of the treatment; this immediate stability is called primary stability and is purely mechanical in nature.
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Mavely, Arun V., Akanksha Mittal, Suman Basavaraju, Paras Mull Gehlot, and Vinutha Manjunath. "Interdisciplinary Management of Gummy Smile and Fluorosis – A Case Report." Journal of Evolution of Medical and Dental Sciences 10, no. 9 (2021): 645–48. http://dx.doi.org/10.14260/jemds/2021/137.
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An unpleasant smile can have a psychosocial effect leading to lack of self-esteem and a challenge in social relations. A perfect smile is a balance among 3 parameters: the white (teeth), the pink (gum) and the lips. A predictable smile correction warrants a multidisciplinary approach and good treatment planning. We planned for a minimally invasive interdisciplinary treatment approach for the restoration of a gummy smile with dental fluorosis in a young female patient. An interdisciplinary management of smile correction is crucial for successful results. Lasers for soft tissue management and minimal tooth preparation for direct composite veneer restorations being minimally invasive periodontal and restorative approaches were the key to success with exceptional patient satisfaction. Minimally invasive procedures in interdisciplinary dentistry should be embraced in the management of procedures requiring correction of both hard and soft tissues, for successful outcomes. Pre-treatment mock-up can build patients' confidence in dentistry and are useful tools for planning treatments with a predictable outcome. A beautiful smile is the fruit of a coordinated and balanced interplay between teeth, gingiva and lips. A compromise in any of these cornerstones can impair the beauty of a smile. Thorough knowledge and understanding about the various elements involved and their harmonious synchronisation makes smile makeovers a challenging task. One such challenge is the treatment of gummy smile. A gummy smile is a clinical condition that has gained tremendous focus and attention recently. Gummy smile is the excessive gingival display when a person smiles. It has been defined as a nonpathological condition causing aesthetic disharmony in which more than 3 mm of gingival tissue is exposed while smiling.1 Aetiology of a gummy smile can be multifactorial and the main factors being altered passive eruption (APE), vertical maxillary excess and upper lip hypermobility. The diagnosis must be accurate to deliver the appropriate line of treatment. Based on the complexity of the underlying aetiological factors involved, the treatment modalities also change from conservative approaches like aesthetic restorations and orthodontic tooth movements to periodontal and maxillofacial surgical procedures.2 Altered passive eruption (APE) also knows as “impaired passive eruption” is a clinical condition characterised by the coronally positioned marginal gingiva in relation to the cementoenamel junction (CEJ). Passive eruption is a physiological phase involved in the process of tooth eruption. As the teeth meet the occlusal plane, the soft tissue covering the teeth migrates apically till the CEJ is reached. Retardation in this process causes failure of the gingiva to migrate apically, resulting in short clinical crowns and excessive soft tissue exposure while smiling. This is visualised as a gummy smile.
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Zhyvotovskyi, I. V., Yu I. Sylenko, and M. V. Khrebor. "COMPARATIVE CHARACTERISTICS OF THE EFFECTIVENESS OF DIRECT AND INDIRECT RESTORATIONS ON TEETH WITH DISCOLORATION." Ukrainian Dental Almanac, no. 3 (September 6, 2019): 27–33. http://dx.doi.org/10.31718/2409-0255.3.2019.05.
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The rapid development of dental industry and constant improvement of technologies in production of basic dental materials contribute to the increase of the quality of rendering dental care with the obligatory consideration not only of functional but also aesthetic parameters during a patient's rehabilitation. However, there is still no precise indication for the use of metal-free structures for the qualitative and durable aesthetic restoration of the frontal group of teeth, white-pink aesthetics and prosthetic rehabilitation, taking into account changes in the parameter of biological width of the tooth and aesthetic criteria.
 The aim of the research is to improve the effectiveness of treatment of frontal group teeth with discoloration using direct and indirect restorations by evaluating and comparing the quality of restorations.
 Research materials and methods. For clinical substantiation and comparison of direct and indirect ceramic restorations with classical fixation and the proposed method of fixation on the heated composite, 90 patients with discoloration and defects of the crown of the front teeth, aged 18 to 65 years, were examined and treated. A comparative evaluation was carried out one year after the restoration was completed.
 The distribution of patients into clinical groups was as follows: the first group – patients who were treated by direct restorations, performed with light- polymer restorative material Estet X HD (Dentsply) (50 patients, 125 restorations); the second group embraced patients, treated with indirect ceramic restorations manufactured by the method of pressing high temperature ceramics (IPS Emax). The latter group was in turn divided into two subgroups, depending on the treatment method: 2A – patients with indirect fixation by conventional methods on the Dentsply dual-cure composite of Calibra production (20 patients, 70 veneers) and 2B - patients with fixation treated on the heated composite Gradia Direct by GC production (20 patients, 55 veneers).
 In order to evaluate the quality of prosthetics in patients with direct and indirect ceramic restorations (veneers) it has been determined the status of these restorations using the modified USPHS (United States Public Health Service; Ryge, G., 1980, 1981) criteria for the frontal teeth group. The obtained results were processed by the method of variational statistics using Student's test.
 Research results. During the clinical evaluation of direct restorations using the modified USPHS criteria for the frontal teeth group, the following complications were identified: tooth sensitivity was present in 5.6% of teeth, fractures, cracks, chips – in 20 restorations (16%); discrepancy between the color of restoration and the color of natural teeth – in 30 restorations (24%); the presence of defects in the texture of the surface – 30 teeth (24%). Impaired marginal adaptation was in 32 restorations, which amounted to 25.6%; loss of restoration gloss – in 66,4%, the presence of secondary caries – in 17 teeth (13,6%); deficiency of occlusal contact –in 13 restorations (10.4%), of approximate contact – in 17 restorations (3.6%). A detailed analysis of the condition of indirect restorations and clinical complications in the second group showed that the most common defects are impairment of marginal adaptation – 16 veneers (12.8%), impairment of the integrity of veneers due to fractures, cracks, chips – 6 (4.8%), inconsistency of color – 13 veneers (10.4%), the presence of surface texture defects – 0, secondary caries – 3 teeth (2.4%), the position of fixing cement – 4 veneers (3.2%). Impaired occlusal contact was observed in 1 tooth (8.8%). No changes in approximate contacts were detected. The total number of complications was 17%, which indicates the need to find the optimization approaches to treatment with these structures.
 Comparison of the status of indirect restorations, depending on the method of fixation by subgroups showed that the impaired integrity of veneers due to fractures, cracks, chips in subgroup 2A was detected in 4 teeth (5.7%), and in the subgroup 2B – in 2 teeth (3.6%). Color change in group 2A was observed in 12 teeth (17.1%), in group 2B – in 3 teeth (5.5%). Disorders of marginal adaptation in group 2A were observed in 12 teeth (17.1%), in group 2B – in 4 teeth (6.6%). Secondary caries was observed on 2 teeth (2.9%) in group 2A and in one patient in group 2B (1.8%). According to the criteria for evaluating the state of indirect ceramic restorations and recommended follow-up professional actions, the following estimates were established: 28% of restorations in the first group, 55.7% of restorations in group 2A, 85.5% of restorations in group 2B received an “excellent” rating; 33.6% of restorations in the first group, 25.7% in group 2A, 5.5% in group 2B received a “good” rating; a “satisfactory” rating was obtained by 11.2% of restorations in the first group, 11.7% in group 2A, 5.4% in group 2B. In the first group, 27.2% of restorations needed immediate replacement, 11.4% – in the second and 3.6% – in the third group.
 The total score for the first group was 3.87±0.07, for 2A – 4.26±0.12, p.05, for group 2B – 4.73±0,1, p1˂p,05, p2˂0,05.
 Conclusion. Thus, our studies of direct and indirect restorations after one year of use showed that the highest level of quality was observed in the group where indirect restorations (veneers) were manufactured, which were fixed on the heated Gradia Direct composite by GC production. The obtained results are confirmed by the statistical analysis.
 To evaluate the quality and duration of using direct and indirect structures with different types of fixation, it is advisable to carry out a long-term monitoring for up to 10 years.
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Robo, Ilma, Saimir Heta, Geriona Lasku, and Vera Ostreni. "Prevalence of Chronic Periodontitis: A Retrospective Cross-sectional Study." SciMedicine Journal 3, no. 1 (2021): 35–43. http://dx.doi.org/10.28991/scimedj-2021-0301-5.
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Introduction: The characteristic appearance of chronic periodontitis with the absence of bacterial plaque or with minimal amounts of it, but with the presence of gingival health, expressed in the specific pink color of the gingiva, is associated with active stages of the disease and its inactive stages. The aim of this study is to compare cross-sectional and retrograde data on the prevalence of chronic periodontitis in the two respective groups of patients, evaluated according to specific periodontal diagnostic tools. Materials and Methods: The study was applied in two groups of patients: the first group of patients presented at the dental clinic in the period October 2019 - January 2020 and the second group; in the period October-November in the annual interval 2010-2018. In these patients, periodontal status was assessed based on probing values, bacterial plaque index, bleeding index, and amount of gingival fluid in specific dentures. The number of natural teeth and the number of teeth replaced with fixed prosthetics were recorded. Results: For both cross-sectional and retrograde data, chronic periodontitis is a disease that affects young people, with a higher prevalence in females. This data is expressed with high ratios of tooth loss for periodontal reasons. The highest dental care for replacement with fixed prosthetics, again belongs to the female sex, but with a high bacterial plaque index. The high index of gingival hemorrhage with reduced bacterial plaque index, are data with high percentages both for the group of patients cross-sectional data and for the group of patients with retrograde data. Conclusions: The high prevalence of chronic periodontitis at a young age indicates a poor prognosis of this disease at older ages. Gingival recession associated with loss of attachment for patients with chronic periodontitis have higher values at age intervals 31-50 years, intervals where systemic pathologies are in the stages of development and stabilization in the human body. Doi: 10.28991/SciMedJ-2021-0301-5 Full Text: PDF
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Matsumura, Atsushi, Tamaki Nakano, Shinji Ono, Akihiro Kaminaka, Hirofumi Yatani, and Daijiro Kabata. "Multivariate analysis of causal factors influencing accuracy of guided implant surgery for partial edentulism: a retrospective clinical study." International Journal of Implant Dentistry 7, no. 1 (2021). http://dx.doi.org/10.1186/s40729-021-00313-2.
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Abstract Background In dental implant treatment, the placement position of the implant body is important. The hypothesis is that there are factors that have a greater impact than the factors that have been studied so far. Material and Methods The deviation between planned and actually placed implants was measured three-dimensionally by modified treatment evaluation method in 110 patients who underwent implant placement with guided surgery for partial edentulism. Ten factors that seemed to affect errors in placement were selected: the type of tooth, type of edentulism, distance from the remaining teeth, the type of implant, implant length, number of implants, method of guidance, the number of teeth supporting the surgical guide, number of anchor pins, and presence or absence of a reinforcement structure. The effect of each factor that corrected each confounding was calculated using multivariate analysis. Results In this study, 188 implant bodies were set to target, and the errors measurement data of the implant position were as follows: average Angle, 2.5 ± 1.6° (95% CI 2.25–2.69); Base, 0.67 ± 0.37 mm (95% CI 0.62–0.72); and Apex, 0.92 ± 0.47 mm (95% CI 0.86–0.98). As the result of multivariate analysis, larger errors were present in the partially guided group than the fully guided group. The number of teeth supporting the surgical guide significantly influenced the error in placement position. The error caused by the number of anchor pins was significantly different for the Angle. Similarly, the presence of the reinforcement structure influenced the error significantly for the Angle. Conclusions It was suggested that the smaller errors could be present by performing guided surgery with full guidance and devising the design of the guide such as the number of teeth supporting the surgical guide, the setting of the anchor pin, and the reinforcement structure.
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Vlahova, Angelina, Viktor Hadzhigaev, Christo Kissov, Rada Kazakova, and Tanya Bozhkova. "OPTIMAL PREPARATION JUNCTIONS FOR ALL-CERAMIC FIXED RESTORATIONS MADE BY CAM 5 – S 2 IMPRESSION, VHF." European Medical, Health and Pharmaceutical Journal 8, no. 2 (2015). http://dx.doi.org/10.12955/emhpj.v8i2.689.
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Introduction: The type of the preparation junction is determined by a number of factors that need to be taken in consideration with CAD/CAM Fixed Prosthodontics: the material of which the construction will be made; the type and condition of the retainer teeth, of their periodontium and the occlusion; the design software, the CAM setting and the type of drills; the working protocol; the type of the cement and the method of cementation.Purpose: The aim of this publication is to describe the optimal preparation junctions for all-ceramic crown and bridge restorations made by CAM 5 - S 2 Impression, VHF.Materials and methods: Suitable are chamfer and shoulder preparation junction with rounded inner angle (width 1 - 1, 5 mm). Trimming of 1.5 – 2 mm dental tissues is necessary on the occlusal surface. The homothetic reduction of teeth is optimal.Results and discussion: The width depends on the size and vitality of the tooth. In stained teeth and those built with metal pins the removal of more tissues provides a greater volume needed to disguise the dark color. Vestibular preparation under the level of the gingiva is preferable to ensure optimal aesthetics. Preparation junction is determined also by the CAD/CAM technology - the type of drills and protocol of impression taking (classical or digital). The creation of a working model with TRIOS, 3Shape intraoral scanner is greatly facilitated by preparation junctions made above the gingival margin.Conclusion: Knowledge about the criteria for selection the preparation junctions is essential for fabrication accurate and aesthetic CAD/CAM restorations.
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Winkler, Daniela E., Marcus Clauss, Maximilian Rölle, et al. "Dental microwear texture gradients in guinea pigs reveal that material properties of the diet affect chewing behaviour." Journal of Experimental Biology 224, no. 13 (2021). http://dx.doi.org/10.1242/jeb.242446.
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ABSTRACT Dental microwear texture analysis (DMTA) is widely used for diet inferences in extant and extinct vertebrates. Often, a reference tooth position is analysed in extant specimens, while isolated teeth are lumped together in fossil datasets. It is therefore important to test whether dental microwear texture (DMT) is tooth position specific and, if so, what causes the differences in wear. Here, we present results from controlled feeding experiments with 72 guinea pigs, which received either fresh or dried natural plant diets of different phytolith content (lucerne, grass, bamboo) or pelleted diets with and without mineral abrasives (frequently encountered by herbivorous mammals in natural habitats). We tested for gradients in dental microwear texture along the upper cheek tooth row. Regardless of abrasive content, guinea pigs on pelleted diets displayed an increase in surface roughness along the tooth row, indicating that posterior tooth positions experience more wear compared with anterior teeth. Guinea pigs feedings on plants of low phytolith content and low abrasiveness (fresh and dry lucerne, fresh grass) showed almost no DMT differences between tooth positions, while individuals feeding on more abrasive plants (dry grass, fresh and dry bamboo) showed a gradient of decreasing surface roughness along the tooth row. We suggest that plant feeding involves continuous intake and comminution by grinding, resulting in posterior tooth positions mainly processing food already partly comminuted and moistened. Pelleted diets require crushing, which exerts higher loads, especially on posterior tooth positions, where bite forces are highest. These differences in chewing behaviour result in opposing wear gradients for plant versus pelleted diets.
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Shetty, Gaurav, Amruta U. Naniwadekar, Dipika K. Mitra, Rohit Shah, and Ankit Desai. "ARE YOUR GUMS IN THE PINK OF HEALTH?" Journal of Indian Dental Association, January 24, 2020. http://dx.doi.org/10.33882/jida.14.25448.
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Introduction The presence of healthy attached tissue at the tooth and implant soft tissue interface correlates with long-term success and stability in function and esthetics and requires conversion of unfavorable soft tissue traits to more favorable ones. Several soft tissue grafting procedures have been developed to improve both the volume of keratinized tissue and the soft tissue contour around implants and the tooth. Objectives This study therefore aims at determining the knowledge , attitude , and perception of Periodontists and implantologists in private practice towards soft tissue grafting around implants and teeth . Methodology Approximately 100 periodontists and dental practioners from Mumbai were provided with a questionnaire to evaluate their knowledge about soft tissue grafting around implants and teeth .The questionnaire consists questions regarding different techniques involved in soft tissue grafting , the materials used for it , the complications faced during the procedure and the preferred method . Results: The results show that very few practioners are practicing soft tissue grafting around natural teeth and implants in their private practice. Conclusion : Thus, keeping in mind the results of the study it is essential to create more awareness about soft tissue augmentation and its importance and also conduct programmes to train dentists for the same. Key Words : Teeth Replacement, awareness, attitude, patients, missing teeth, socioeconomic status.
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Kihara, Mariana Tiai, Thiado André Salvitti De Sá Rocha, Caio Cesar Carmo Santos, et al. "Anatomorradiographic Description of the Capybara´s Teeth (Hydrochoerus hydrochaeris)." Acta Scientiae Veterinariae 47, no. 1 (2018). http://dx.doi.org/10.22456/1679-9216.89415.
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Background: The capybara (Hydrochoerus hydrochaeris) is the largest South American rodent species alive, and it preferentially inhabits floodable environments. Currently, capybara populations have been increasing owing to lack of predators and increased availability of food. This favors reemergence of Rocky Mountain spotted fever in the state of São Paulo, as these animals can play host to the Cayenne tick (Amblyomma cajennense), a vector of the bacteria that transmit this disease. The objective of this work was to perform anatomical and radiographic analyses on the teeth of capybaras to broaden knowledge on the morphology of this species, as scientific interest on capybaras has been growing owing to reemergence of Rocky Mountain spotted fever.Materials, Methods & Results: Six capybara carcasses from the state of São Paulo, Brazil, were taken to the Laboratory for Animal Anatomy of the School of Agricultural Sciences and Veterinary Medicine of UNESP - Jaboticabal for obtainment of heads by disarticulation of the cervical region. The heads were frozen at -18°C, and then sectioned medially with a band saw to avoid tissue overlap in radiographs. The head halves were radiographed in the Diagnostic Imaging Section at the Veterinary Hospital of UNESP-Jaboticabal in laterolateral projection. After taking the radiographs, the teeth were extracted from the dental arches using anatomical forceps and pliers, placed in 0.1% thymol, and kept at 4°C for up to 30 days. The teeth were dried using an air jet produced by a compressor, and placed in molds made of aluminum foil. The specimens were embedded in alternating layers of clear polymethylmethacrylate and liquid polymerization catalyst until each tooth was completely covered. After 24 h, the molds were removed, and the blocks were sectioned using a band saw. Transversal and longitudinal calcified tooth sections with a thickness of 1.5 mm were prepared. The sections were sanded using an automotive sander with 80-grit sandpaper, and then sanded by hand until a thickness of 0.12 mm was reached. The tooth fragments were removed from the resin, dehydrated in ethanol, clarified in xylene, and placed in a Petri dish containing glycerin for evaluation using a mesoscope and a negatoscope. Capybaras were found to have one incisor, one premolar, and three molar teeth in each dental hemiarch (superior and inferior). All teeth contained large, open roots. The root of the superior incisor is rostral to the root of the premolar tooth, and the root of the inferior incisor lies between the roots of the premolar and the first molar teeth. The inferior incisors are much larger than their superior counterparts, and their ends are chisel-shaped. The pulp cavity extends from the apical region to up to two-thirds of the longitudinal length of the tooth, and the enamel is arranged in layers. The roots of the four molar teeth are large and resemble several aggregated laminae arranged longitudinally - five laminae in the inferior molars, four laminae in the premolar, first and second molars, and 13 or 14 laminae in the third superior molar.Discussion: The dental formula of capybaras is similar to that of guinea pigs, chinchillas, and pacas, but different from that of agoutis. All teeth are aradicular as in guinea pigs and chinchillas because of the great tooth wear owing to feeding. In chinchillas and guinea pigs, the apex of the mandibular incisor tooth is located between the second and the third molar; in capybaras, it is located between the premolar and the first molar. The premolar and molar teeth of capybaras are similar to their counterparts in the paca and to the molars of elephants because they exhibit parallel internal laminae. The teeth of capybaras are similar to those of guinea pigs in terms of number and type of teeth, and similar to those of pacas and elephants regarding external morphology.
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"Oral Rehabilitation on Implants and Introduction of Pathogenic Mechanisms in Relation to Oral Implants - Sugar Diabetes." Revista de Chimie 70, no. 10 (2019): 3750–52. http://dx.doi.org/10.37358/rc.19.10.3750.
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Dental implants are made of medical titanium and perfectly fit into human bone tissue; the dental implant can last a lifetime. Not beeing living organic structures, there are no nerve endings, neither at the implant level nor at the artificial crown level. The use of quality implants by an experienced implantologist, assisted by advanced technology, transforms the treatment with dental implants into the medical-surgical act with the highest success rate among dental and even medical treatments.Through the complete replacement of the tooth, including the root, can artificially reproduce the function of the natural tooth, with a strong and stable base. The implant crown, made of aesthetic materials (porcelain, zirconium) and anchored to it by means of the prosthetic abutment, will be surrounded by a healthy and aesthetic gum. Especially if the prosthetic abutment (the connecting element between the implant itself and the artificial crown) will be made of zirconium - natural light will cross ceramic layers, similar to enamel and dentine, offering a white of envy and glitter to the smile. Around the porcelain crowns (whole ceramics or zirconia ceramics) the gingiva will conform healthily, without the slightest sign of inflammation. These elements, the white of the teeth and the pink of the gums define the concept of dental aesthetics. The main problems that diabetic patients may encounter, are gingival inflammation and periodontal disease, dental mobility and tooth loss. When a dental implant is influenced by the type of diabetes, its failure rate is higher in patients with type 1 diabetes than in patients with type 2 diabetes. The study included a number of 56 patients, who presented themselves for performing an implant. Of these, 7 patients did not perform an implant. Diabetes mellitus defines a chronic metabolic disorder, which may have multiple etiopathogenesis, characterized by changes in carbohydrate, lipid and protein metabolism. Stability of the implant in the bone, immediately after implantation is crucial for the success of the treatment; this immediate stability is called primary stability and is purely mechanical in nature. Keywords: Dental implants, dental treatments, diabetes, failure rate
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Abreu, Amara, Jimmy Londono, Aram Torosian, Jack Yu, and Daniel Levy-Bercowski. "Aesthetic Concepts and Interdisciplinary Approach in a Patient With Bilateral Cleft Lip and Palate and Missing Premaxilla: A Case Report." Cleft Palate-Craniofacial Journal, November 28, 2020, 105566562096929. http://dx.doi.org/10.1177/1055665620969290.
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The smile is an important part of the individual’s facial expression, it allows the communication of emotions and ideas. However, its aesthetics can be severely compromised in patients with cleft lip and palate due to multiple missing, malformed and malposed teeth, abnormal soft tissue morphology, upper lip scar tissue, and altered anatomy in the lower third of the face. This clinical case reports the interdisciplinary treatment approach of a young male patient with complete bilateral cleft lip and palate and missing premaxilla. Prosthodontic rehabilitation included a zirconia-based fixed dental prosthesis, with pink porcelain to camouflage the bony defect and restore the facial and dental aesthetics. Maxillary second premolars received lithium disilicate crowns to obtain a more harmonious smile line and adequate occlusion. A resin-bonded fixed partial denture restored a missing mandibular central incisor. Tooth proportions, gingival contours and facial ratios routinely used in noncleft patients, were used to achieve a consonant smile. The final restorations satisfied the patient’s expectations, restored an aesthetically pleasant smile, and provided an adequate occlusion.
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Brunetto, Juliana Lujan, Marcio Campaner, Caroline de Freitas Jorge, et al. "Reabilitação estética anterior associando prótese metalocerâmica e prótese fixa metal-free: relato de caso." ARCHIVES OF HEALTH INVESTIGATION 8, no. 1 (2019). http://dx.doi.org/10.21270/archi.v8i1.3249.
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Devido a evolução dos sistemas cerâmicos, atualmente, são permitidas inúmeras associações de materiais restauradores. Entretanto, mimetizar as características visuais das próteses livres de metal com próteses metalocerâmica permanece um desafio. Assim, o objetivo deste trabalho foi relatar o caso clínico de substituição de próteses desadaptadas, homogeneizando próteses parciais fixas livres de metal e metalocerâmicas dento e implantossuportadas, após cirurgia periodontal. O paciente de 55 anos, gênero masculino, compareceu à Clínica de Prótese Parcial Fixa, da Faculdade de Odontologia de Araçatuba – FOA/UNESP em 2017 queixando-se dos seus dentes anteriores estarem “feios” e com a “raiz aparecendo”. No exame clínico foi constatada recessão gengival nos elementos 11 e 13, os quais continham uma prótese parcial fixa de três elementos metalocerâmicas desadaptada, prótese sobre implante nos elementos 21 e 22, que apresentavam-se desadaptadas e com estética desfavorável. No exame radiográfico pôde-se observar a presença de um núcleo metálico fundido nos elementos 11 e 13. Foi proposto, então, a confecção de coroas totais livres de metal nos elementos anteriores superiores (13, 12, 11, 21 e 23) e coroa metalocerâmica para o elemento 22. Para isso, foi realizado enceramento diagnóstico inicial e, após o consentimento do paciente, foi efetuada a remoção das próteses antigas. Com a remoção, visualizamos uma depressão na vestibular do rebordo na área do 12 (ausente), solucionado com um enxerto gengival subepitelial. Após a realização dos preparos dentários e moldagem com silicone de adição as peças foram confeccionadas com sistema e.max Ceram (Ivoclar Vivadent). Após a prova estética e ajustes oclusais iniciais, as peças foram preparadas para cimentação resinosa com o sistema Variolink® N (Ivoclar Vivadent). O cimento transparente foi selecionado previamente por meio de provas com o kit Try-In. Conclui-se que, apesar da disparidade dos materiais, é possível mimetizá-los e oferecer resultados reabilitadores suficientemente estéticos e satisfatórios.Descritores: Implantação Dentária; Estética Dentária; Materiais Dentários.ReferênciasCardenas AFM, Mora CAP, Siqueira FSF, Parreiras SO, Gomes JC. Restabelecimento estético de um sorriso envelhecido: Caso clínico. Revista APCD de Estética. 2015;3(1):42-52.Strasding M, Fehmer V, Pjetursson BE, Sailer I. Extending the service life of existing dental restorations with esthetic and functional limitations. J Prosthet Dent. 2018;119(6):893-96.Koidou VP, Rosenstiel SF, Rashid RG. Celebrity smile esthetics assessment: Smile angulation. J Prosthet Dent, 2017;117(5):636-41.Levin, EI. Dental esthetics and the golden proportion. J Prosthet Dent. 1978;40(3):244-52.Flores-Mir C, Silva E, Barriga MI, Lagravere MO, Major PW. Lay person's perception of smile aesthetics in dental and facial views. 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