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Dental crowns

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https://www.readbyqxmd.com/read/28081288/short-dental-implants-6-mm-versus-long-dental-implants-11-15-mm-in-combination-with-sinus-floor-elevation-procedures-3-year-results-from-a-multi-center-randomized-controlled-clinical-trial
#1
Veronika Pohl, Daniel S Thoma, Katarzyna Sporniak-Tutak, Abel Garcia-Garcia, Thomas D Taylor, Robert Haas, Christoph H F Hämmerle
AIM: To test whether or not the use of short dental implants (6 mm) results in an implant survival rate similar to that with longer implants (11-15 mm) in combination with sinus grafting. METHODS: This multi-center study enrolled 101 patients with partial edentulism in the posterior maxilla and a remaining bone height of 5-7 mm. Included patients were randomly assigned to receive short implants (6 mm; GS / group short) or long implants (11-15 mm) simultaneously with sinus grafting (GG / group graft)...
January 12, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28076661/impression-techniques-used-for-single-unit-crowns-findings-from-the-national-dental-practice-based-research-network
#2
Michael S McCracken, David R Louis, Mark S Litaker, Helena M Minyé, Thomas Oates, Valeria V Gordan, Don G Marshall, Cyril Meyerowitz, Gregg H Gilbert
PURPOSE: To: (1) determine which impression and gingival displacement techniques practitioners use for single-unit crowns on natural teeth; and (2) test whether certain dentist and practice characteristics are significantly associated with the use of these techniques. MATERIALS AND METHODS: Dentists participating in the National Dental Practice-Based Research Network were eligible for this survey study. The study used a questionnaire developed by clinicians, statisticians, laboratory technicians, and survey experts...
January 11, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28074260/accuracy-and-reproducibility-of-measurements-on-plaster-models-and-digital-models-created-using-an-intraoral-scanner
#3
Leonardo Tavares Camardella, Hero Breuning, Oswaldo de Vasconcellos Vilella
AIM: The purpose of the present study was to evaluate the accuracy and reproducibility of measurements made on digital models created using an intraoral color scanner compared to measurements on dental plaster models. METHODS: This study included impressions of 28 volunteers. Alginate impressions were used to make plaster models, and each volunteers' dentition was scanned with a TRIOS Color intraoral scanner. Two examiners performed measurements on the plaster models using a digital caliper and measured the digital models using Ortho Analyzer software...
January 10, 2017: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/28073636/prognosis-of-double-crown-retained-removable-dental-prostheses-compared-with-clasp-retained-removable-dental-prostheses-a-retrospective-study
#4
Keita Ishida, Toshifumi Nogawa, Yoshiyuki Takayama, Masayasu Saito, Atsuro Yokoyama
PURPOSE: The present study compared the clinical prognosis of double crown-retained removable dental prostheses (D-DRPs) with that of clasp-retained removable dental prostheses (C-RDPs). METHODS: Clinical records of 201 patients who had received 52 D-RDPs with 144 abutment teeth (D-teeth) and 199 C-RDPs with 399 abutment teeth (C-teeth) at the Prosthetic Dentistry Clinic in Hokkaido University Hospital between April 2005 and June 2015 were analyzed. Survival and complication probabilities of the two types of prostheses and abutment teeth were evaluated using the Kaplan-Meier method and compared using the log-rank test...
January 7, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28066993/developing-a-biomimetic-tooth-bud-model
#5
Elizabeth E Smith, Weibo Zhang, Nathan R Schiele, Ali Khademhosseini, Catherine K Kuo, Pamela C Yelick
A long-term goal is to bioengineer, fully functional, living teeth for regenerative medicine and dentistry applications. Biologically based replacement teeth would avoid insufficiencies of the currently used dental implants. Using natural tooth development as a guide, a model was fabricated using post-natal porcine dental epithelial (pDE), porcine dental mesenchymal (pDM) progenitor cells, and human umbilical vein endothelial cells (HUVEC) encapsulated within gelatin methacrylate (GelMA) hydrogels. Previous publications have shown that post-natal DE and DM cells seeded onto synthetic scaffolds exhibited mineralized tooth crowns composed of dentin and enamel...
January 8, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28065967/influence-of-trace-elements-on-dental-enamel-properties-a-review
#6
Zeeshan Qamar, Zubaidah Binti Haji Abdul Rahim, Hooi Pin Chew, Tayyaba Fatima
Dental enamel, an avascular, irreparable, outermost and protective layer of the human clinical crown has a potential to withstand the physico-chemical effects and forces. These properties are being regulated by a unique association among elements occurring in the crystallites setup of human dental enamel. Calcium and phosphate are the major components (hydroxyapatite) in addition to some trace elements which have a profound effect on enamel. The current review was planned to determine the aptitude of various trace elements to substitute and their influence on human dental enamel in terms of physical and chemical properties...
January 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28050519/multidisciplinary-restoration-of-traumatized-and-displaced-maxillary-central-incisor-by-bent-wire-system-a-novel-approach
#7
Shilpa S Sasalawad, Vivek Jogani, Suryakanth M Pai, Rashmi C Chour, Deepti V Balehosur
Management of traumatic injuries to teeth is a challenge to dental practice, as it occurs when dentists are least prepared for it. The direction and the force of the object or the fall significantly affects the diagnosis, treatment plan and therefore the outcome of the treatment. These traumatic injuries may present with different clinical situations which demand immediate attention and assessment by the clinician. The maxillary central incisor crown fractures are the most common variant of trauma, because of the anterior and protrusive positioning...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28044248/the-opinion-of-children-and-their-parents-about-four-different-types-of-dental-restorations-in-a-public-health-service-in-brazil
#8
R Maciel, D Salvador, K Azoubel, R Redivivo, C Maciel, C da Franca, E Amerongen, V Colares
AIM: To investigate the opinion of children and their parents of four different types of restoration placed in primary molars. METHODS: A mixed method study in which both children and their parents were involved. In the quantitative study, children and parents gave their opinion using a face scale about four different types of restoration immediately after placement, evaluating how satisfied they were. In the qualitative part, children and their parents were interviewed to report their preference among the four types of restoration using dental models and photos...
January 2, 2017: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/28032199/does-dental-trauma-in-the-primary-dentition-increases-the-likelihood-of-trauma-in-the-permanent-dentition-a-longitudinal-study
#9
Marília Leão Goettems, Letícia Coutinho Brancher, Catiara Terra da Costa, Maria Laura Menezes Bonow, Ana Regina Romano
OBJECTIVES: The aim of this longitudinal study was to assess the likelihood of children suffering traumatic dental injuries in the permanent dentition subsequent to traumatic dental injuries in their primary dentition. MATERIALS AND METHODS: A longitudinal study was conducted in Pelotas, Brazil. Children were assessed in 2007, when they were aged 2-5 years, and in 2013, at which time, they were aged 8-11 years. Data collection included interviews with parents and clinical oral examination for dental trauma and occlusion...
December 28, 2016: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28024874/dental-and-temporomandibular-joint-pathology-of-the-california-mountain-lion-puma-concolor-couguar
#10
A Aghashani, A S Kim, P H Kass, F J M Verstraete
Skulls from 91 California mountain lions (Puma concolor couguar) were examined macroscopically and radiographically. The majority of the skulls were from young adult animals (57.1%). The skull specimens were from 42 male (46.1%) and 34 female (37.4%) animals, while the gender was unknown for the remainder. The majority (94.5%) of teeth were present for examination. Only 11 teeth were identified as absent congenitally; five of these teeth were maxillary first molar teeth and three were maxillary second premolar teeth...
December 23, 2016: Journal of Comparative Pathology
https://www.readbyqxmd.com/read/28024819/randomized-controlled-within-subject-evaluation-of-digital-and-conventional-workflows-for-the-fabrication-of-lithium-disilicate-single-crowns-part-ii-cad-cam-versus-conventional-laboratory%C3%A2-procedures
#11
Irena Sailer, Goran I Benic, Vincent Fehmer, Christoph H F Hämmerle, Sven Mühlemann
STATEMENT OF PROBLEM: Clinical studies are needed to evaluate the entire digital and conventional workflows in prosthetic dentistry. PURPOSE: The purpose of the second part of this clinical study was to compare the laboratory production time for tooth-supported single crowns made with 4 different digital workflows and 1 conventional workflow and to compare these crowns clinically. MATERIAL AND METHODS: For each of 10 participants, a monolithic crown was fabricated in lithium disilicate-reinforced glass ceramic (IPS e...
December 23, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28004377/die-koronektomie-eine-behandlungsoption-f%C3%A3-r-weisheitsz%C3%A3-hne-im-unterkiefer-bei-sehr-naher-lagebeziehung-zum-n-alveolaris-inferior
#12
Daniel Wolf, Tara Renton
Extractions of mandibular third molars are a common procedure in dental practice. In cases where a close anatomical relationship of the root and the inferior alveolar nerve exists, the risk of transient or even permanent nerve injury increases. Nerve injury is difficult to manage and symptoms may cause severe patient discomfort, i.e. lifelong dysesthesia, i.e. painful sensation of the lower lip and chin area on the affected side. An alternative surgical procedure is coronectomy, which has first been described 25 year ago...
2016: Swiss Dental Journal
https://www.readbyqxmd.com/read/28001242/effect-of-the-time-point-of-acid-etching-on-the-persistence-of-sealer-residues-after-using-different-dental-cleaning-protocols
#13
Keren Cristina Fagundes Jordão-Basso, Milton Carlos Kuga, Matheus Coêlho Bandéca, Marco Antonio Hungaro Duarte, Flávia Angélica Guiotti
Endodontic sealer residues remaining within the pulp chamber dentin after root canal obturation and cleaning with various solvents may compromise the appearance and the durability of dental restorations. Acid etching is routinely performed prior to application of dentine adhesive systems, but is effect on residual sealer material and the optimal time-point for performing etching, are unknown. Here, we evaluated the effect of acid etching on the dentin surface when performed either immediately or 7 days after removal of the endodontic sealer with two solvents, i...
December 22, 2016: Brazilian Oral Research
https://www.readbyqxmd.com/read/28000274/digital-technology-in-fixed-implant-prosthodontics
#14
REVIEW
Tim Joda, Marco Ferrari, German O Gallucci, Julia-Gabriela Wittneben, Urs Brägger
Digital protocols are increasingly influencing prosthodontic treatment concepts. Implant-supported single-unit and short-span reconstructions will benefit mostly from the present digital trends. In these protocols, monolithic implant crowns connected to prefabricated titanium abutments, which are created based on data obtained from an intraoral scan followed by virtual design and production, without the need of a physical master cast, have to be considered in lieu of conventional manufacturing techniques for posterior implant restorations...
February 2017: Periodontology 2000
https://www.readbyqxmd.com/read/27995137/biomechanical-consequences-of-the-elastic-properties-of-dental-implant-alloys-on-the-supporting-bone-finite-element-analysis
#15
Esteban Pérez-Pevida, Aritza Brizuela-Velasco, David Chávarri-Prado, Antonio Jiménez-Garrudo, Fernando Sánchez-Lasheras, Eneko Solaberrieta-Méndez, Markel Diéguez-Pereira, Felipe J Fernández-González, Borja Dehesa-Ibarra, Francesca Monticelli
The objective of the present study is to evaluate how the elastic properties of the fabrication material of dental implants influence peri-implant bone load transfer in terms of the magnitude and distribution of stress and deformation. A three-dimensional (3D) finite element analysis was performed; the model used was a section of mandibular bone with a single implant containing a cemented ceramic-metal crown on a titanium abutment. The following three alloys were compared: rigid (Y-TZP), conventional (Ti-6Al-4V), and hyperelastic (Ti-Nb-Zr)...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27990505/clinical-evaluation-of-a-novel-dental-implant-system-as-single-implants-under-immediate-loading-conditions-4-month-post-loading-results-from-a-multicentre-randomised-controlled-trial
#16
Marco Esposito, Anna Trullenque-Eriksson, Rodolfo Blasone, Giuliano Malaguti, Cristiano Gaffuri, Marco Caneva, Armando Minciarelli, Giuseppe Luongo
PURPOSE: To evaluate the safety and clinical effectiveness of a novel dental implant system (GENESIS Implant System, Keystone Dental, Massachusetts, USA) using another dental implant system by the same manufacturer as a control (PRIMA Implant System, Keystone Dental). MATERIALS AND METHODS: A total of 53 patients requiring at least two single crowns had their sites randomised according to a split-mouth design to receive both implant systems at six centres. If implants could be placed with a torque superior to 40 Ncm they were to be loaded immediately with provisional crowns, otherwise after 3 months of submerged healing...
2016: European Journal of Oral Implantology
https://www.readbyqxmd.com/read/27989583/collaborative-management-of-combined-periodontal-endodontic-lesions-with-a-palatogingival-groove-a-case-series
#17
Young-Dan Cho, Jung-Eun Lee, Yoonjin Chung, Woo-Cheol Lee, Yang-Jo Seol, Yong-Moo Lee, In-Chul Rhyu, Young Ku
INTRODUCTION: This article reports 3 representative cases of interdisciplinary management of a palatogingival groove in maxillary lateral incisors. The development, pathology, and effectiveness of management approaches in cases involving a combined periodontal-endodontic lesion with a palatogingival groove are discussed. METHODS: We describe 3 patients with a noncontributory medical history presenting with a chief complaint related to a maxillary incisor and diagnosed with a combined periodontal-endodontic lesion with a palatogingival groove at Seoul National University Dental Hospital, Seoul, Korea...
December 15, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/27989366/dental-and-temporomandibular-joint-pathology-of%C3%A2-the-american-black-bear-ursus-americanus
#18
E J Clark, S R Chesnutt, J N Winer, P H Kass, F J M Verstraete
Museum specimens (maxillae and/or mandibles) from 371 American black bears (Ursus americanus) acquired between 1889 and 2006 were examined macroscopically according to predefined criteria, and 348 were included in this study. Of the 348 specimens, 126 (36.2%) were from male animals, 106 (30.5%) were from female animals and 116 (33.3%) were from animals of unknown sex. Specimen ages ranged from young adult (n = 63, 18.1%) to adult (n = 285, 81.9%), with juveniles excluded from the study. The number of teeth available for examination was 12,019 (82...
December 15, 2016: Journal of Comparative Pathology
https://www.readbyqxmd.com/read/27987717/effect-of-different-types-of-prosthetic-platforms-on-stress-distribution-in-dental-implant-supported-prostheses
#19
Lurian Minatel, Fellippo Ramos Verri, Guilherme Abu Halawa Kudo, Daniel Augusto de Faria Almeida, Victor Eduardo de Souza Batista, Cleidiel Aparecido Araujo Lemos, Eduardo Piza Pellizzer, Joel Ferreira Santiago
A biomechanical analysis of different types of implant connections is relevant to clinical practice because it may impact the longevity of the rehabilitation treatment. Therefore, the objective of this study is to evaluate the Morse taper connections and the stress distribution of structures associated with the platform switching (PSW) concept. It will do this by obtaining data on the biomechanical behavior of the main structure in relation to the dental implant using the 3-dimensional finite element methodology...
February 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27984088/ten-year-survival-and-complication-rates-of-lithium-disilicate-empress-2-tooth-supported-crowns-implant-supported-crowns-and-fixed-dental-prostheses
#20
Maren Teichmann, Fabian Göckler, Volker Weber, Murat Yildirim, Stefan Wolfart, Daniel Edelhoff
OBJECTIVES: To prospectively evaluate the clinical long-term outcome of tooth-supported crowns (SCs), implant-supported crowns (ISCs), and fixed dental prostheses (FDPs) made of a lithium-disilicate glass-ceramic framework material (IPS Empress 2). MATERIALS AND METHODS: Between 1997 and 1999, a total of 184 restorations (106 SCs, 32 ISCs, 33 FDPs, and 13 diverse restorations) were placed in 73 patients. Kaplan-Meier estimation was applied for survival and chipping-free rates...
January 2017: Journal of Dentistry
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