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Dental crowns

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https://www.readbyqxmd.com/read/29042724/evaluation-of-bond-strength-between-grooved-titanium-alloy-implant-abutments-and-provisional-veneering-materials-after-surface-treatment-of-the-abutments-an-in-vitro-study
#1
Gowtham Venkat, Murugesan Krishnan, Suganya Srinivasan, Muthukumar Balasubramanian
INTRODUCTION: Titanium has become the material of choice with greater applications in dental implants. The success of the dental implant does not only depend on the integration of the implant to the bone but also on the function and longevity of the superstructure. The clinical condition that demands long-term interim prosthesis is challenging owing to the decreased bond between the abutment and the veneering material. Hence, various surface treatments are done on the abutments to increase the bond strength...
July 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29037415/dental-phenotypic-shape-variation-supports-a-multiple-dispersal-model-for-anatomically-modern-humans-in-southeast-asia
#2
Julien Corny, Manon Galland, Marta Arzarello, Anne-Marie Bacon, Fabrice Demeter, Dominique Grimaud-Hervé, Charles Higham, Hirofumi Matsumura, Lan Cuong Nguyen, Thi Kim Thuy Nguyen, Viet Nguyen, Marc Oxenham, Thongsa Sayavongkhamdy, François Sémah, Laura L Shackelford, Florent Détroit
The population history of anatomically modern humans (AMH) in Southeast Asia (SEA) is a highly debated topic. The impact of sea level variations related to the Last Glacial Maximum (LGM) and the Neolithic diffusion on past population dispersals are two key issues. We have investigated competing AMH dispersal hypotheses in SEA through the analysis of dental phenotype shape variation on the basis of very large archaeological samples employing two complementary approaches. We first explored the structure of between- and within-group shape variation of permanent human molar crowns...
November 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/29033526/complexity-of-comprehensive-care-treatments-in-undergraduate-dental-programs-the-benefits-of-observing-and-assisting-experienced-faculty-members
#3
Moataz Elgezawi, Khalid Hassan, Adel Alagl, Ahmad M Al-Thobity, Basel Al-Mutairi, Thamir Al-Houtan, Shazia Sadaf
OBJECTIVE: To improve the confidence of the final year dental students in completing occlusal and oral rehabilitation of patients, with complexities beyond their scope, based on full analysis of the biomechanical and esthetic considerations of each case. MATERIAL & METHODS: Two comprehensive patient situations presenting with special difficulties including extensive, reduced vertical dimension of occlusion, limited interocclusal space and maxillary alveolar bone for implant insertion necessitating bone augmentation and a sinus lift surgery was managed by two students at our institute...
October 2017: Saudi Dental Journal
https://www.readbyqxmd.com/read/29032814/healthy-dental-pulp-oxygen-saturation-rates-in-subjects-with-homozygous-sickle-cell-anemia-a-cross-sectional-study-nested-in-a-cohort
#4
Soraia de Fátima Carvalho Souza, Erika Bárbara Abreu Fonseca Thomaz, Cyrene Piazera Silva Costa
INTRODUCTION: To compare the percentage of arterial oxygen saturation (SpO2) in healthy teeth with confirmed pulp vitality between individuals with sickle cell anemia (HbSS) and normal hemoglobin A (HbAA). METHODS: This is a cross-sectional study nested within a cohort. Samples (n = 2543) comprised teeth with intact crowns and pulp vitality confirmed by thermal sensitivity tests and no history of caries, periodontal disease, or dental trauma. A total of 728 teeth of 113 individuals with HbSS and 1815 teeth of 246 individuals with HbAA were evaluated...
October 9, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29032313/influence-of-platform-diameter-in-the-reliability-and-failure-mode-of-extra-short-dental-implants
#5
Dimorvan Bordin, Edmara T P Bergamo, Estevam A Bonfante, Vinicius P Fardin, Paulo G Coelho
PURPOSE: To evaluate the influence of implant diameter in the reliability and failure mode of extra-short dental implants. MATERIALS AND METHODS: Sixty-three extra-short implants (5mm-length) were allocated into three groups according to platform diameter: Ø4.0-mm, Ø5.0-mm, and Ø6.0-mm (21 per group). Identical abutments were torqued to the implants and standardized crowns cemented. Three samples of each group were subjected to single-load to failure (SLF) to allow the design of the step-stress profiles, and the remaining 18 were subjected to step-stress accelerated life-testing (SSALT) in water...
September 21, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29028851/peri-implant-crestal-bone-changes-around-zirconia-implants-in-periodontally-healthy-and-compromised-patients
#6
Kristian Kniha, Stefan Milz, Heinz Kniha, Nassim Ayoub, Frank Hölzle, Ali Modabber
PURPOSE: No consensus regarding the efficacy of zirconia implants in maintaining peri-implant hard and soft tissue health has yet been obtained. The aim of this retrospective follow-up study was to gain knowledge about peri-implant bone behavior and about implant survival and success after treatment with zirconia dental implants in patients with normal and compromised soft and hard tissue conditions. MATERIALS AND METHODS: This follow-up study involved 86 patients with 123 zirconia implants (Straumann PURE Ceramic Implant) that were radiographically investigated directly after implant placement (day 0), 3 months after placement, and 1 year after the definitive implant crown placement...
October 13, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29026699/comparison-of-the-clinical-biological-width-with-the-published-standard-histologic-mean-values
#7
Fatme Mouchref Hamasni, Fady El Hajj
AIMS AND OBJECTIVES: Biologic width (BW) as defined by Cohen is the part of the supracrestal gingival tissues that occupy the space between the base of the gingival crevice and the alveolar crest; it includes the junctional epithelium and the connective tissue element. Interactions between dental crowns and the marginal periodontal tissues analyzed in many review papers concluded that the recognition of the BW, in terms of crown margin placement, is beneficial for periodontal health. Therefore, knowledge of the dimensions of the sum of the junctional epithelium and connective tissue attachment as well as the sulcus depth (SD) is of clinical relevance...
September 2017: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/29024303/the-influence-of-crown-to-implant-ratio-on-marginal-bone-levels-around-splinted-short-dental-implants-a-radiological-and-clincial-short-term-analysis
#8
Lukas Hingsammer, Georg Watzek, Bernhard Pommer
BACKGROUND: The amount of marginal bone resorption around dental implants is considered to have a significant impact on implant stability as well as implant survival rates. PURPOSE: The aim of this prospective study was to investigate the influence of prosthetic as well as patient specific factors on marginal bone loss around short dental implants. MATERIALS AND METHODS: Seventy-six implants, which supported splinted crowns were included for investigation...
October 12, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/29023620/analysis-of-morphologic-attributes-in-dental-esthetics-a-new-concept
#9
Aarati Nayak, Nami Rajpoot, Ranganath Nayak, Ramakant Nayak
An interdisciplinary approach to esthetics requires a comprehensive treatment plan formulated through evaluation of several restorative and periodontal parameters that influence the esthetic zone. A total of 25 subjects (13 women and 12 men, with an age range of 18 to 23 years) participated in the study. Parameters such as gingival biotype on the labial aspect, crown width to crown length ratio, and interdental papilla proportion, with respect to the maxillary anterior teeth, were determined. An attempt was made to establish a correlation between these components, and a positive correlation was found...
November 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/29020030/the-first-hyaenodont-from-the-late-oligocene-nsungwe-formation-of-tanzania-paleoecological-insights-into-the-paleogene-neogene-carnivore-transition
#10
Matthew R Borths, Nancy J Stevens
Throughout the Paleogene, most terrestrial carnivore niches in Afro-Arabia were occupied by Hyaenodonta, an extinct lineage of placental mammals. By the end of the Miocene, terrestrial carnivore niches had shifted to members of Carnivora, a clade with Eurasian origins. The transition from a hyaenodont-carnivore fauna to a carnivoran-carnivore fauna coincides with other ecological changes in Afro-Arabia as tectonic conditions in the African Rift System altered climatic conditions and facilitated faunal exchange with Eurasia...
2017: PloS One
https://www.readbyqxmd.com/read/29016588/mesiodens-a-hospital-based-study
#11
Senchhema Limbu, Parajeeta Dikshit, Sujaya Gupta
 Background: A mesiodens, is the most frequent supernumerary tooth present in the maxillary central incisor region. This study is conducted to know the radiographic characteristics and management of mesiodens in children visiting hospital. METHODS: A cross-sectional retrospective data collection was done from hospital dental records of children who visited the institution from December 2015-December 2016. Radiographic characteristic of mesiodens including the number, shape, position, direction of crown and complication caused by mesiodens were recorded...
September 8, 2017: Journal of Nepal Health Research Council
https://www.readbyqxmd.com/read/28987488/post-retained-single-crowns-placed-in-endodontically-treated-teeth-with-more-than-50-of-dental-tissue-remaining-probably-have-a-high-survival-after-7-years
#12
Romina Brignardello-Petersen
No abstract text is available yet for this article.
October 4, 2017: Journal of the American Dental Association
https://www.readbyqxmd.com/read/28983077/regulation-of-root-patterns-in-mammalian-teeth
#13
Hyejin Seo, Jinsun Kim, Jae Joon Hwang, Ho-Gul Jeong, Sang-Sun Han, Wonse Park, Kanghyun Ryu, Hong Seomun, Jae-Young Kim, Eui-Sic Cho, Joo-Cheol Park, Kyung-Seok Hu, Hee-Jin Kim, Dong-Hyun Kim, Sung-Won Cho
Mammalian teeth have diverse pattern of the crown and root. The patterning mechanism of the root position and number is relatively unknown compared to that of the crown. The root number does not always match to the cusp number, which has prevented the complete understanding of root patterning. In the present study, to elucidate the mechanism of root pattern formation, we examined (1) the pattern of cervical tongues, which are tongue-like epithelial processes extending from cervical loops, (2) factors influencing the cervical tongue pattern and (3) the relationship among patterns of cusp, cervical tongue and root in multi-rooted teeth...
October 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28982223/continuous-eruption-of-maxillary-teeth-and-changes-in-clinical-crown-length-a-10-year-longitudinal-study-in-adult-women
#14
Luis Huanca Ghislanzoni, Grethe Jonasson, Stavros Kiliaridis
BACKGROUND: Continuous physiologic eruption of teeth may become a main aesthetic issue for implants inserted in the maxillary anterior region. PURPOSE: To study maxillary tooth vertical changes during a 10 years period by 3-dimensional superimposition of digital dental casts. MATERIAL AND METHODS: Alginate impressions were taken at both baseline and at the 10-year follow-up in a sample of 24 adult Swedish women (average age of 48 years at T0)...
October 5, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28978271/feline-dental-implants-long-term-follow-up-of-two-cases
#15
Rocco E Mele, Anthony Caiafa, Gregori M Kurtzman
Dental implants have become an option for replacement of lost canine teeth in cats. Although cats appear to manage well after a canine extraction, complications such as lip entrapment can occur after maxillary canine tooth extraction. Even cats with a complicated crown fracture of the maxillary canine tooth that have had root canal therapy can develop lip entrapment. This can lead to painful lip ulcers and potential need for further dental treatment. Canine tooth replacement with a dental implant and prosthodontic crown is, in the authors' experience, a predictable option that can be offered to clients who would like to replace a lost canine tooth...
January 1, 2017: Journal of Veterinary Dentistry
https://www.readbyqxmd.com/read/28977132/impact-of-dental-trauma-and-esthetic-impairment-on-the-quality-of-life-of-preschool-children
#16
Bruna Miroski Gonçalves, Loraine Fernandes Dias, Carla da Silva Pereira, Marcos Ximenes Ponte, Andréa Cristina Konrath, Michele da Silva Bolan, Mariane Cardoso
OBJECTIVE: To evaluate the impact of dental trauma and impaired esthetics on the quality of life (QoL) of preschool children and their relatives. METHODS: Study conducted with 192 children aged 2 to 5 years in 11 preschools in Florianópolis, Santa Catarina, South of Brazil. Parents/caregivers completed a questionnaire on quality of life (Brazilian version of the Early Childhood Oral Health Impact Scales - B-ECOHIS), a socioeconomic survey, and then answered specific questions related to dental trauma...
September 21, 2017: Revista Paulista de Pediatria: Orgão Oficial da Sociedade de Pediatria de São Paulo
https://www.readbyqxmd.com/read/28972586/a-survey-of-paediatric-caries-management-teaching-within-dental-therapy-programmes-in-the-uk
#17
J Foley
Objective To assess didactic and clinical skills teaching of conventional and alternative treatment techniques for the management of dental caries in paediatric dentistry in dental therapy schools across the UK.Method A structured online questionnaire was developed using SurveyMonkey. The survey link was emailed to all teaching leads for all 22 dental therapy schools throughout the UK. The survey was open online for three months.Results Data were obtained for 20 schools. Regarding didactic and skills teaching of conventional techniques, the majority of schools taught complete caries removal and plastic restoration...
November 2017: British Dental Journal
https://www.readbyqxmd.com/read/28969914/an-up-to-50-year-follow-up-of-crown-and-veneer-survival-in-a-dental-practice
#18
Ryan C Olley, Manoharan Andiappan, Peter Frost
STATEMENT OF PROBLEM: Indirect restorations are an important treatment in dental practice, but long-term survival studies are lacking. PURPOSE: The purpose of this retrospective study was to report on the outcome of indirect restorations, which were followed up annually for up to 50 years in a dental practice. MATERIAL AND METHODS: A retrospective survival study was undertaken at a mixed National Health Service (NHS)/private dental practice in London, UK...
September 29, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28967399/marginal-adaptation-and-cad-cam-technology-a-systematic-review-of-restorative-material-and-fabrication-techniques
#19
REVIEW
Sofia Papadiochou, Argirios L Pissiotis
STATEMENT OF PROBLEM: The comparative assessment of computer-aided design and computer-aided manufacturing (CAD-CAM) technology and other fabrication techniques pertaining to marginal adaptation should be documented. Limited evidence exists on the effect of restorative material on the performance of a CAD-CAM system relative to marginal adaptation. PURPOSE: The purpose of this systematic review was to investigate whether the marginal adaptation of CAD-CAM single crowns, fixed dental prostheses, and implant-retained fixed dental prostheses or their infrastructures differs from that obtained by other fabrication techniques using a similar restorative material and whether it depends on the type of restorative material...
September 27, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28967395/simplified-cementation-of-lithium-disilicate-crowns-retention-with-various-adhesive-resin-cement-combinations
#20
Glen H Johnson, Xavier Lepe, Amanda Patterson, Oliver Schäfer
STATEMENT OF PROBLEM: A composite resin cement and matching self-etch adhesive was developed to simplify the dependable retention of lithium disilicate crowns. The efficacy of this new system is unknown. PURPOSE: The purpose of this in vitro study was to determine whether lithium disilicate crowns cemented with a new composite resin and adhesive system and 2 other popular systems provide clinically acceptable crown retention after long-term aging with monthly thermocycling...
September 27, 2017: Journal of Prosthetic Dentistry
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