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Włodzimierz Więckiewicz, Marcin Kasiak, Natalia Grychowska, Joanna Smardz, Mariusz Pryliński
BACKGROUND: The reduction of dental and alveolar undercuts on plaster models is an important issue in the process of planning partial and complete prostheses. In recent years, new materials such as methacrylate resins that can be used to reduce undercuts have emerged. Their great advantage is high temperature insensitivity and relatively high ease of use. OBJECTIVES: The study aimed at determining the factors that affect the shear bond strength, and which material can be better used at the laboratory stage of preparing the plaster model to facilitate the denture bearing area and reduce the traumatizing impact of the prosthesis...
March 19, 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
Manabu Kanazawa, Maiko Iwaki, Toshio Arakida, Shunsuke Minakuchi
PURPOSE: This article describes the protocol of a digital impression technique to make an impression and recording of the jaw relationship of edentulous patients for the fabrication of CAD/CAM custom tray using computer-aided design and manufacturing (CAD/CAM) technology. METHODS: Scan the maxillary and mandibular edentulous jaws using an intraoral scanner. Scan the silicone jig with the maxillary and mandibular jaws while keeping the jig between the jaws. Import the standard tessellation language data of the maxillary and mandibular jaws and jig to make a jaw relation record and fabricate custom trays (CAD/CAM trays) using a rapid prototyping system...
March 16, 2018: Journal of Prosthodontic Research
Katarzyna Świder, Jacek Matys
After a stroke, patients frequently show compromised swallowing, mastication, and speech, as well as unfavorable motion and deviation of the tongue and mandible. The dentist can improve the oral rehabilitation of a patient with deteriorated facial and oral muscles after a stroke by incorporating orofacial myofunctional therapy. This report describes a method for tongue exercises and correction of mandible deviation in an edentulous patient after a stroke by using a pearl on a wire in the anteriomedian palatal part of the maxillary denture...
March 15, 2018: Journal of Prosthetic Dentistry
Vladimir Ovchinnik, Berfin Karatas, Burak Yilmaz, Edwin A McGlumphy
This clinical report describes the prosthetic and surgical management of a patient with a restricted oral orifice due to a perioral burn. Complete oral rehabilitation was achieved with maxillary and mandibular implant-supported fixed prostheses using a combination of digital and conventional impressions, design, and processing techniques.
March 15, 2018: Journal of Prosthetic Dentistry
Keitaro Kubo, Takashi Koike, Takayuki Ueda, Kaoru Sakurai
STATEMENT OF PROBLEM: Information is lacking about the selection criteria for silicone resilient denture liners applied as a matrix material for attachments on overdentures. PURPOSE: The purpose of this in vitro study was to investigate the mechanical properties of silicone resilient denture liners and their influence on the initial retention force of overdenture attachments and the reduction in retention force over time. MATERIAL AND METHODS: Nine types of silicone resilient denture liner were injected and fixed to the matrix section of an experimental denture base...
March 15, 2018: Journal of Prosthetic Dentistry
Jody L Clements, Daranee Tantbirojn, Antheunis Versluis, David R Cagna
STATEMENT OF PROBLEM: Denture tooth fracture may limit the longevity of dental prostheses. Whether the strength of the denture tooth material is affected by the denture processing technique is unclear. PURPOSE: The purpose of this in vitro study was to investigate whether the denture processing technique affects the mechanical properties of denture tooth materials. MATERIAL AND METHODS: Two denture processing techniques, injection and compression molding, were tested for 3 types of denture teeth: nanohybrid composite (NHC), interpenetrating network (IPN), and microfiller-reinforced polyacrylic (MRP)...
March 15, 2018: Journal of Prosthetic Dentistry
Hamad S AlRumaih, Abdulaziz AlHelal, Nadim Z Baba, Charles J Goodacre, Ali Al-Qahtani
STATEMENT OF PROBLEM: Clinical studies have identified advantages of digital complete denture technology including patient satisfaction, improved mastication, increased retention, and technique efficiency. However, studies that focusing on the effect of denture adhesive on the retention of milled and heat-activated denture bases are lacking. PURPOSE: The purpose of this clinical study was to evaluate the effectiveness of denture adhesive on the retention of milled and heat-activated denture bases...
March 15, 2018: Journal of Prosthetic Dentistry
Korbinian Benz, Carla Kozmacs, Andree Piwowarczyk, Jochen Jackowski
A female patient, now aged 17 years, was diagnosed with rhabdomyosarcoma (RMS) in the right pterygopalatine fossa when she was 3 years old. The RMS was successfully treated by excision, but the subsequent radiation and polychemotherapy resulted in the complete anesthesia of the distribution area of the right trigeminal nerve and loss of vision in the right eye. The patient also experienced pain in the mandibular joints and masticatory muscles. Panoramic radiographs displayed a multiple agenesia of the permanent teeth and underdeveloped apices...
March 15, 2018: Journal of Prosthetic Dentistry
Saori Yamamoto, Hiroshi Shiga
PURPOSE: To clarify the relationship between masticatory performance and oral health-related quality of life (OHRQoL) before and after complete denture treatment. METHODS: Thirty patients wearing complete dentures were asked to chew a gummy jelly on their habitual chewing side, and the amount of glucose extraction during chewing was measured as the parameter of masticatory performance. Subjects were asked to answer the Oral Health Impact Profile (OHIP-J49) questionnaire, which consists of 49 questions related to oral problems...
March 13, 2018: Journal of Prosthodontic Research
Bruno Tochetto Primo, Leonardo Marcos Mezzari, Luís Carlos da Fontoura Frasca, Raquel Linderman, Elken Gomes Rivaldo
PURPOSE: To evaluate and compare the clinical and radiographic outcomes of mandibular rehabilitation with fixed prostheses on three implants with immediate versus delayed loading. MATERIALS AND METHODS: The sample comprised 21 patients who underwent treatment with immediate loading and 23 who received delayed loading. All had worn their prostheses for at least 18 months. Radiographic evaluation of bone loss was carried out in Adobe Photoshop CS5 by a single calibrated examiner using digitized panoramic radiographs...
March 15, 2018: International Journal of Oral & Maxillofacial Implants
Eduardo José Pereira Oliveira, Vinício Felipe Brasil Rocha, Denismar Alves Nogueira, Alessandro Aparecido Pereira
This research aimed to assess the oral health related to quality of life among hypertensive and diabetic patients in the city of Alfenas, Brazil. This was a domiciliary-based, descriptive-analytical, cross-sectional research with a random, systematic sample stratified by the Family Health Team, consisting of 218 individuals. The following indexes were applied: DMFT, T-Health, FS-T, SiC index, use and need of prosthesis and OHIP-14. Most of the patients (56.42%) had only high blood pressure, were females (67...
March 2018: Ciência & Saúde Coletiva
Toshihito Takahashi, Tomoya Gonda, Akiko Tomita, Yoshinobu Maeda
PURPOSE: Palateless maxillary implant overdentures are often used for patients experiencing problems with a full-palate denture. However, palateless overdentures are reported to be a risk factor for implant complications. The purpose of this study was to examine the strain on implants beneath palateless overdentures with unsplinted attachments under various implant distributions. MATERIALS AND METHODS: A maxillary edentulous model with implants and an experimental palateless overdenture were fabricated...
March 2018: International Journal of Oral & Maxillofacial Implants
Severine L. Staub, Eckart Teubner, Nicola U. Zitzmann
The aim of this retrospective study was to investigate the clinical outcome of Dalbo®-Rotex® retention elements in a private practice. The majority of the retention elements was fixed with self-adhesive composite cement, and in almost 40% the exposed root surface was additionally covered with composite. The success rate of 96.3% after 24 months in a total of 50 included patients (response rate 48.5%) demonstrated that a simple and cost-effective fixation of removable dentures using prefabricated, chair-side inserted retention elements is feasible...
March 12, 2018: Swiss Dental Journal
Yuka Tanaka, Hiroshi Shiga
PURPOSE: To clarify whether the occlusal state affects the masticatory performance of elderly adults. METHODS: Elderly women were asked to chew a gummy jelly, and the amount of glucose extraction was measured as the parameter for masticatory performance. Subjects were divided into five groups depending on occlusal support on the habitual chewing side (G1: no occlusal support of posterior teeth, G2: occlusal support of first premolar, G3: occlusal support of premolars, G4: occlusal support from first premolar to first molar, and G5: occlusal support from first premolar to second molar)...
March 9, 2018: Journal of Prosthodontic Research
Yiqin Fang, Jing-Huan Fang, Seung-Mi Jeong, Byung-Ho Choi
Few studies have reported the application of digital technology for the process of impression and interocclusal recordings in edentulous patients. This article describes a digitizing system for generating digital edentulous models with a jaw relationship by taking direct digital impressions and a virtual bite registration using intraoral digital scanning. A specialized scan retractor was used to make digital impressions of edentulous jaws in patients' mouths using an intraoral scanner. Virtual bite registration was obtained with optical scanning of the buccal surfaces of both jaws at the occlusal vertical dimension...
March 9, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
M Lawrence, K Fan
No abstract text is available yet for this article.
March 9, 2018: British Dental Journal
Brian J Goodacre, Charles J Goodacre
The newest impression techniques use intraoral scanners to capture both the hard and soft tissues. However, with edentulous patients, the accuracy of an intraoral scanner to capture an acceptable impression for the fabrication of a complete denture needs to be evaluated. Therefore, the purpose of this report of two patient treatments is to describe a technique that used intraoral scanning to record mucosal morphology and fabricate computer-aided design/computer-assisted manufacture (CAD/CAM) complete dentures...
March 2018: International Journal of Prosthodontics
Matshediso Mothopi-Peri, C Peter Owen
PURPOSE: To compare the influence of abutment teeth guide planes and guiding surfaces on retention of a removable partial denture (RPD). MATERIALS AND METHODS: Extracted teeth embedded into a maxillary cast in the first premolar and second molar positions simulated two bounded saddles. Acrylic resin RPDs were made with no guide planes, then with guide planes, then with guiding surfaces added to directly contact the guide planes. The maximum loads on removal from the cast were recorded...
March 2018: International Journal of Prosthodontics
Otto Steinmassl, Vincent Offermanns, Wolfgang Stöckl, Herbert Dumfahrt, Ingrid Grunert, Patricia-Anca Steinmassl
Computer-aided design and computer-aided manufacturing (CAD/CAM) denture base manufacturers claim to produce their resin pucks under high heat and pressure. Therefore, CAD/CAM dentures are assumed to have enhanced mechanical properties and, as a result, are often produced with lower denture base thicknesses than conventional, manually fabricated dentures. The aim of this study was to investigate if commercially available CAD/CAM denture base resins have more favourable mechanical properties than conventionally processed denture base resins...
March 8, 2018: Materials
N Hussain, H Jabbar, M Hayati, J Wu, T P Hyde
OBJECTIVES: The 3 objectives are to assess current preferences for impressions for complete dentures, audit practice and compare practice to current UK teaching. METHODS: Three surveys where undertaken; a survey of GDPs preferences, an audit of practice and a survey of teaching in UK dental schools. RESULTS: UK Universities advocate border moulded custom trays. In stated preferences, 99% of practitioners used custom trays for private practice; 67% for NHS work...
March 8, 2018: European Journal of Prosthodontics and Restorative Dentistry
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