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https://www.readbyqxmd.com/read/27915125/artificial-neural-networks-as-a-powerful-numerical-tool-to-classify-specific-features-of-a-tooth-based-on-3d-scan-data
#1
Stefan Raith, Eric Per Vogel, Naeema Anees, Christine Keul, Jan-Frederik Güth, Daniel Edelhoff, Horst Fischer
Chairside manufacturing based on digital image acquisition is gainingincreasing importance in dentistry. For the standardized application of these methods, it is paramount to have highly automated digital workflows that can process acquired 3D image data of dental surfaces. Artificial Neural Networks (ANNs) arenumerical methods primarily used to mimic the complex networks of neural connections in the natural brain. Our hypothesis is that an ANNcan be developed that is capable of classifying dental cusps with sufficient accuracy...
November 27, 2016: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/27897182/design-and-development-of-novel-antibacterial-ti-ni-cu-shape-memory-alloys-for-biomedical-application
#2
H F Li, K J Qiu, F Y Zhou, L Li, Y F Zheng
In the case of medical implants, foreign materials are preferential sites for bacterial adhesion and microbial contamination, which can lead to the development of prosthetic infections. Commercially biomedical TiNi shape memory alloys are the most commonly used materials for permanent implants in contact with bone and dental, and the prevention of infections of TiNi biomedical shape memory alloys in clinical cases is therefore a crucial challenge for orthopaedic and dental surgeons. In the present study, copper has been chosen as the alloying element for design and development novel ternary biomedical Ti‒Ni‒Cu shape memory alloys with antibacterial properties...
November 29, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27895348/a-6-year-evaluation-of-223-tapered-dental-implants-and-associated-prosthesis-in-92-patients-at-a-university-hospital
#3
Sana Ehsen Nagi, Farhan Raza Khan, Rabia Ali
The aim of the retrospective study was to assess the clinical and radiographic outcome of the dental implant surgery and prosthetics. It was conducted at the Aga Khan University Hospital, Karachi, and comprised of medical charts and radiographic records of patients visiting between 2010 and 2015. Variables such as implant dimensions, final prosthesis, method of retention, loading protocol and patient factors were analysed. A total of 223 implants (143(64.1%) in maxilla and 80(35.9%) in mandible) were placed in 92 subjects (50(54...
October 2016: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/27895345/a-review-of-the-failed-cases-of-dental-implants-at-a-university-hospital-in-karachi-pakistan
#4
Farhan Raza Khan, Rabia Ali, Sana Ehsan Nagi
The retrospective study was conducted to assess the dental implants that experienced failure. It was conducted at the dental clinic of the Aga Khan University Hospital, Karachi, and comprised record of dental implants from July 2010 to June 2015. Variables such as patient age, gender and systemic status, length and diameter of implants, bone grafting, type of definitive prosthesis (crown or bridge or overdenture), nature of retention (cement versus screw retained), loading strategy (immediate versus delayed loading), etc...
October 2016: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/27892564/zirconia-based-dental-ceramics-structure-mechanical-properties-biocompatibility-and-applications
#5
Chandkiram Gautam, Jarin Joyner, Amarendra Gautam, Jitendra Rao, Robert Vajtai
Zirconia (ZrO2) based dental ceramics have been considered to be advantageous materials with adequate mechanical properties for the manufacturing of medical devices. Due to its very high compression strength of 2000 MPa, ZrO2 can resist differing mechanical environments. During the crack propagation on the application of stress on the surface of ZrO2, a crystalline modification diminishes the propagation of cracks. In addition, zirconia's biocompatibility has been studied in vivo, leading to the observation of no adverse response upon the insertion of ZrO2 samples into the bone or muscle...
November 28, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27891302/epidemiology-of-sj%C3%A3-gren-s-syndrome-from-an-oral-perspective
#6
REVIEW
Anne Isine Bolstad, Kathrine Skarstein
Oral symptoms are among the most distressing manifestations for patients with Sjögren's syndrome (SS). The feeling of dry mouth is unpleasant, and hyposalivation may contribute to difficulty in speaking, chewing and swallowing and reduced quality of life. Reduced salivary flow increases the risk for dental caries and problems with prosthetic replacement. It seems that SS is not as frequently occurring as previously anticipated. Population-based prevalence studies on primary SS in Europe, conducted on large background populations and in accordance with the AECG criteria, reported of a prevalence of 1-9 cases per 10,000 people...
2016: Current Oral Health Reports
https://www.readbyqxmd.com/read/27888049/overdenture-prosthesis-retained-by-mini-dental-implants-a-systematic-review
#7
REVIEW
Cleidiel Aparecido Araujo Lemos, Fellippo Ramos Verri, Victor Eduardo de Souza Batista, Joel Ferreira Santiago Júnior, Caroline Cantieri Mello, Eduardo Piza Pellizzer
OBJECTIVE: The purpose of this systematic review was to evaluate the influence of mini implants to retain overdenture prosthesis in terms of survival rates of mini implants, marginal bone loss, satisfaction, and quality of life. DATA: This report followed the PRISMA Statement and PICO question. This review has been registered at PROSPERO under the number CRD42016036141. SOURCE: Two independent reviewers performed a comprehensive search of studies published until September 2016 and listed in the PubMed/MEDLINE, Embase, and The Cochrane Library databases...
November 22, 2016: Journal of Dentistry
https://www.readbyqxmd.com/read/27881326/minimally-invasive-prosthetic-restoration-of-posterior-tooth-loss-with-resin-bonded-wing-retained-and-inlay-retained-fixed-dental-prostheses-fabricated-from-monolithic-zirconia-a-clinical-report-of-two-patients
#8
Wolfgang Bömicke, Jochen Karl, Peter Rammelsberg
The esthetics and biocompatibility of ceramic resin-bonded fixed dental prostheses (RBFDPs) are regarded as better than those of their metal ceramic counterparts. However, a high incidence of complications in the posterior arches of ceramic RBFDPs initiated a process of continuous and evolving design development. This clinical report describes 2 successful restorations of a missing posterior tooth with monolithic zirconia RBFDPs with 2 different retainer designs: retentively prepared adhesive wings and inlays...
October 27, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27881321/a-digital-approach-integrating-facial-scanning-in-a-cad-cam-workflow-for-complete-mouth-implant-supported-rehabilitation-of-patients-with-edentulism-a-pilot-clinical-study
#9
Bassam Hassan, Beatriz Gimenez Gonzalez, Ali Tahmaseb, Marcus Greven, Daniel Wismeijer
STATEMENT OF PROBLEM: Complete-mouth implant-supported rehabilitations are challenging because of the multiple surgical and prosthetic steps involved in clinical evaluations to assure passive prosthesis fit and optimal esthetic and functional outcomes. As a result, these rehabilitations are usually associated with substantial clinical time, patient discomfort, and high treatment cost. PURPOSE: The purpose of this pilot clinical study was to evaluate a novel digital approach integrating digital intraoral dental and extraoral facial scanning information to design and mill a computer-aided design and computer-aided manufacturing (CAD-CAM) implant-retained prosthesis for patients with complete edentulism...
October 27, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27881318/clinical-characteristics-of-an-allergic-reaction-to-a-polyether-dental-impression-material
#10
Caroline Freitas Rafael, Anja Liebermann
Allergic and hypersensitivity reactions to dental impression materials may occur throughout dental treatment, with diverse manifestations from slight redness to severe pain and a burning mouth with total stomatitis. Patients are often unaware of these allergic reactions, which makes early identification of the cause almost impossible. In addition, symptoms usually begin after 24 hours and mostly in patients with a preexisting history of allergic responses. This report describes a patient with a suspected allergic reaction to a polyether dental impression material during prosthetic rehabilitation associated with a mandibular telescopic denture...
October 27, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27881315/cad-cam-implant-supported-fixed-complete-dental-prosthesis-with-titanium-milled-molars-a-clinical-report
#11
Abdulaziz AlHelal, Bader AlBader, Mathew T Kattadiyil, Antoanela Garbacea, Periklis Proussaefs
Implant-supported fixed complete dental prostheses have been associated with a high implant success rate in long-term studies. However, they have also been associated with a high frequency of prosthetic complications. The most frequent and primary prosthetic complication has been the fracture or wear of the occlusal surface of acrylic resin teeth that are typically attached to a metal framework. The design of the framework in this clinical report involved the incorporation of metal occlusal surfaces for the posterior first molars to the framework...
October 27, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27881314/orientation-of-handle-for-successful-prosthetic-treatment-in-patients-with-an-anatomic-compromise-after-a-maxillectomy
#12
Yuka I Sumita, Mariko Hattori, Mahmoud E Elbashti, Hisashi Taniguchi
This clinical technique provides a key procedure for successful prosthetic treatment in patients with an anatomical compromise after a maxillectomy. When making a preliminary impression, the clinician must keep the handle of the stock tray parallel to the patient's interpupillary line extraorally to maintain the correct position of the tray and to make a record of the inclination of the occlusal plane. This simple consideration during this first step of making a preliminary impression can be an important guide for both dentists and dental technicians...
October 27, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27866699/recording-the-trajectory-of-mouth-opening-and-closing-for-the-fabrication-of-an-occlusal-splint
#13
Jong-Eun Kim, Joo Hyun Kwon, Jee-Hwan Kim, June-Sung Shim
Various attempts have been made to transfer the transverse hinge axis and mandibular movement pattern to the mechanical articulator and to fabricate dental prostheses with the fewest errors. However, the occlusal adjustment of a dental prosthesis is always necessary to ensure a precise intraoral fit even when the facebow transfer technique is used in the cast mounting procedure. This is because the true hinge axis is not obtained when the facebow is applied to a patient who exhibits a variable mandible movement pattern rather than a single rotational axis...
November 17, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27861666/internal-vs-external-connection-single-implants-a-retrospective-study-in-an-italian-population-treated-by-certified-prosthodontists
#14
Paolo Vigolo, Stefano Gracis, Fabio Carboncini, Sabrina Mutinelli
PURPOSE: The design of an implant connection that allows prosthetic suprastructures to be attached to implants has long been debated in the dental literature. The goal of this retrospective study was to evaluate the 5-year clinical results for a large number of single implants restored by certified prosthodontists in an attempt to establish whether different clinical outcomes could be detected for external- or internal-connection implants. MATERIALS AND METHODS: All single implants with internal or external connections inserted in 27 private dental practices from January 1, 2003 to December 31, 2007 were evaluated...
November 2016: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/27861648/fracture-resistance-of-straight-and-angulated-zirconia-implant-abutments-supporting-anterior-three-unit-lithium-disilicate-fixed-dental-prostheses
#15
Samah Saker, Sameh El-Shahat, Mohamed Ghazy
PURPOSE: The purpose of this study was to evaluate fracture resistance of straight and angulated zirconia implant abutments supporting anterior three-unit lithium disilicate fixed dental prostheses (FDPs). MATERIALS AND METHODS: Four different test groups (n = 8) representing anterior three-unit implant-supported all-ceramic FDPs were fabricated to fit an in vitro model with two implants. Groups 1 and 2 simulated a clinical situation with an ideal implant position for maxillary left central and right lateral incisors from a prosthetic point of view, which allowed for the use of a straight, prefabricated zirconia and titanium abutment...
November 2016: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/27859976/fatigue-failure-of-narrow-implants-with-different-implant-abutment-connection-designs
#16
Dimorvan Bordin, Lukasz Witek, Vinícius P Fardin, Estevam A Bonfante, Paulo G Coelho
PURPOSE: To evaluate the reliability of narrow diameter dental implants (NDIs) with similar macrogeometry and 3 implant-abutment connection designs. MATERIALS AND METHODS: Eighty-four NDIs (3.5 × 10 mm) were selected and divided into 4 groups (n = 21/group) according to implant-abutment connection design, as follows: EH - external hexagon, IH - internal hexagon, IC - internal conical, and IC-M - internal conical connected to a monolithic titanium abutment. Identical abutments were torqued to the implants, and standardized maxillary incisor crowns were cemented and subjected to step-stress accelerated life testing (SSALT) in water...
November 18, 2016: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/27857819/osseointegration-of-dental-implants-in-a-patient-with-hajdu-cheney-syndrome
#17
Panagiota Dokou, Ioannis K Karoussis, George Papavasiliou, Phophi Kamposiora, Theophilos P Vrahopoulos, John A Vrotsos
BACKGROUND: Hajdu-Cheney Syndrome (HCS) is a rare hereditary bone metabolism disorder characterized by acro-osteolysis, short stature, craniofacial changes, periodontitis and premature tooth loss. Extensive search of the current literature revealed no reports of implant placement in patients with HCS. CASE REPORT: A 22-year old woman with osteoporosis, generalized advanced chronic periodontitis and premature tooth loss was referred to the Postgraduate Clinic of Periodontology, University of Athens-Greece...
2016: Open Dentistry Journal
https://www.readbyqxmd.com/read/27857817/conservative-socket-regeneration-with-buccal-wall-defect-using-guided-tissue
#18
Mohammed Jasim Al-Juboori
Progressive alveolar bone resorption after tooth extraction may lead to surgical and prosthetic-driven difficulties, especially when deciding to use a dental implant to replace the extracted tooth. This case report discusses an irreparable lower left second premolar tooth with a periodontal lesion on the buccal side. A preservative tooth extraction was performed. Then, the socket was grafted with bovine bone, a collagen membrane was placed between the buccal bone and the attached gingiva, covering the bone dehiscence buccally, and the socket without a flap was raised...
2016: Open Dentistry Journal
https://www.readbyqxmd.com/read/27843652/implant-retained-obturator-for-an-edentulous-patient-with-a-hemimaxillectomy-defect-complicated-with-microstomia
#19
Pravinkumar G Patil, Smita Nimbalkar-Patil
Patient. A 68-year-old man was operated on for squamous cell carcinoma (T3N3M0) of the maxilla creating the hemimaxillary surgical defect on right side. The remaining arch was completely edentulous. There was remarkable limitation in the oral opening with reduced perimeter of the oral cavity due to radiation and surgical scar contracture. This article describes prosthetic rehabilitation by modifying the design of the obturator and achieving the retention with dental implant. Discussion. Severe limitation in the oral opening may occur in clinical situations following the postsurgical management of oral and maxillofacial defects...
2016: Case Reports in Dentistry
https://www.readbyqxmd.com/read/27836142/prosthodontic-planning-in-patients-with-temporomandibular-disorders-and-or-bruxism-a-systematic-review
#20
REVIEW
Daniele Manfredini, Carlo E Poggio
STATEMENT OF PROBLEM: The presence of temporomandibular disorders (TMDs) and/or bruxism signs and symptoms may present multifaceted concerns for the prosthodontist. PURPOSE: The purpose of this systematic review was to evaluate the relationship between prosthetic rehabilitation and TMDs and bruxism. MATERIAL AND METHODS: Three research questions were identified based on different clinical scenarios. Should prosthodontics be used to treat TMD and/or bruxism? Can prosthodontics cause TMDs and/or bruxism? How can prosthodontics be performed (for prosthetic reasons) in patients with TMDs and/or bruxism? A systematic search in the PubMed database was performed to identify all randomized clinical trials (RCTs) comparing the effectiveness of prosthodontics with that of other treatments in the management of TMDs and/or bruxism (question 1); clinical trials reporting the onset of TMDs and/or bruxism after the execution of prosthetic treatments in healthy individuals (question 2); and RCTs comparing the effectiveness of different prosthodontics strategies in the management of the prosthetic needs in patients with TMDs and/or bruxism (question 3)...
November 8, 2016: Journal of Prosthetic Dentistry
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