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removable denture failure

Ken-Ichi Mizuno, Kazuya Takahashi, Kentaro Tominaga, Yuki Nishigaki, Hiroki Sato, Satoshi Ikarashi, Kazunao Hayashi, Takashi Yamamoto, Yutaka Honda, Satoru Hashimoto, Kenya Kamimura, Manabu Takeuchi, Junji Yokoyama, Yuichi Sato, Masaaki Kobayashi, Shuji Terai
Background. Dentures and dental instruments are frequently encountered ingested foreign bodies. The aim of the present study was to assess the safety and efficacy of endoscopically removing ingested dental objects. Methods. Twenty-nine consecutive patients with 29 dental objects who were treated at the Niigata University Medical and Dental Hospital from August 2009 to December 2015 were retrospectively reviewed. Characteristics of the patients and the ingested dental objects, the clinical features and findings of radiological imaging tests, and outcomes of endoscopic removal were analyzed...
2016: Gastroenterology Research and Practice
Prajna P Shetty, Makam Gangaiah, Ramesh Chowdhary
INTRODUCTION: Every patient needs a comprehensive treatment planning. Dentists must consider the advantages and disadvantages of the available implant prosthetic options and match them to patient's expectations. Hybrid denture prosthesis is one, i.e., fabricated and retained by screw threaded into implant abutments, most of the time on four implants. Sometimes due to failure of an implant, the prosthesis needs to be replaced with a newer casting to accommodate the existing implants. Clinical consideration: This article presents a novel technique, wherein the existing framework of the fixed prosthesis can be used to convert the fixed prosthesis to removable prosthesis on the existing implants, without recasting...
September 1, 2016: Journal of Contemporary Dental Practice
Amália Moreno, Marcela Filié Haddad, Marcelo Coelho Goiato, Eduardo Passos Rocha, Wirley Gonçalves Assunção, Humberto Gennari Filho, Emerson Gomes Dos Santos, Mariana Vilela Sonego, Daniela Micheline Dos Santos
INTRODUCTION: The use of removable partial denture (RPD) is considered as low-cost and common treatment option to rehabilitate edentulous areas. AIM: This study aimed to investigate the epidemiological data of patients rehabilitated with removable partial denture (RPD) in order to assess treatment survival rate and failures. MATERIALS AND METHODS: Epidemiological data and medical records of patients treated with RPD between 2007 and 2012 at the RPD discipline of a Brazilian University (Aracatuba Dental School- UNESP) were evaluated as well as dental records of patients who underwent RPD treatments (fabrication or repairs) between 2000 and 2010...
May 2016: Journal of Clinical and Diagnostic Research: JCDR
Sudhir Bhandari
INTRODUCTION: In the era of implant supported restorations, conventional complete denture (CD) for isolated edentulous maxilla still remains the first choice of treatment despite being its frequent mechanical failures. STATEMENT OF PROBLEM: Edentulous maxillary arch restored with polymethyl methacrylate (PMMA) based CDs when opposed by natural and/or restored dentition is biomechanically and functionally a compromised rehabilitation. MATERIALS AND METHODS: Seven patients (4 males, 3 females) in the age range of 55-75 years were treated for their frequent fracture of the single maxillary denture...
January 2016: Journal of Indian Prosthodontic Society
Nathan E Robison, Daranee Tantbirojn, Antheunis Versluis, David R Cagna
STATEMENT OF PROBLEM: Denture tooth fracture or debonding remains a common problem in removable prosthodontics. PURPOSE: The purpose of this in vitro study was to explore factors determining failure strengths for combinations of different denture tooth designs (shape, materials) and injection or compression molded denture base resins. MATERIAL AND METHODS: Three central incisor denture tooth designs were tested: nanohybrid composite (NHC; Ivoclar Phonares II), interpenetrating network (IPN; Dentsply Portrait), and microfiller reinforced polyacrylic (MRP; VITA Physiodens)...
August 2016: Journal of Prosthetic Dentistry
Yiran An, Danyang Li, Nima Roohpour, Julien E Gautrot, Asa H Barber
OBJECTIVE: The mechanical properties of bio adhesives in oral care application are expected to be critical in defining the stability and release of devices such as dentures from the oral tissue. A multiscale experimental mechanical approach is used to evaluate the performance of denture adhesive materials. METHODS: The inherent mechanical behavior of denture fixatives was examined by separating adhesive material from a representative polymethyl methacrylate (PMMA) surface using atomic force microscopy (AFM) approaches and compared to macroscopic mechanical testing...
May 2016: Dental Materials: Official Publication of the Academy of Dental Materials
Alan G T Payne, Andrew Tawse-Smith, Daniel Wismeijer, Rohana K De Silva, Sunyoung Ma
OBJECTIVE: To determine implant survival and prosthodontic maintenance of implant-assisted mandibular removable partial dentures in a multicentre prospective study up to 10 years. MATERIALS AND METHODS: Forty-eight participants with mandibular distal extension partial dentures were selected. A control group of 12 New Zealand participants had new conventional mandibular partial dentures made. Three test groups of 36 participants in New Zealand (n = 12), the Netherlands (n = 12) and Colombia (n = 12) had bilateral distal implants placed...
January 22, 2016: Clinical Oral Implants Research
Osvaldo D Moráguez, Francesca Vailati, Urs C Belser
This two-part case presentation describes the prosthetic challenge of managing complications in a 50-year-old female patient after inadequate esthetic risk assessment, treatment planning, and implant placement in the anterior maxilla. In Part I, the clinical situation was described, and different restorative solutions were proposed to correct the extreme facial inclination of the implants, excluding major surgical procedures, namely implant removal. In Part II, different prosthetic options are discussed, and the final treatment is revealed...
2015: International Journal of Esthetic Dentistry
Amanda Ouzer
Implant-supported, full-arch hybrid prostheses have developed from cast-metal frameworks with acrylic or porcelain to all-ceramic zirconia frameworks. CAD/CAM manufacturing removed the inaccuracies seen with casting and made use of zirconia possible. The materials and processes for prosthodontic fabrication are explained. Zirconia is highly opaque and versatile. However, porcelain-veneered zirconia frameworks have shown higher enamel wear, among other problems. Lithium disilicate has been shown to be more translucent than zirconia...
November 2015: New York State Dental Journal
Peter Rehmann, Anke Podhorsky, Bernd Wöstmann
PURPOSE: This retrospective clinical study evaluated the long-term outcomes of cantilever fixed partial dentures (CFPDs) and the factors influencing their survival probability. MATERIALS AND METHODS: The study is based on a convenience sample of 57 patients who received 71 CFPDs on a total of 176 vital abutment teeth. The mean survival time of the CFPDs was calculated using a Kaplan-Meier estimate. The following variables were analyzed as covariates of the survival function (logrank test, P < ...
November 2015: International Journal of Prosthodontics
Bradley A Purcell, Edwin A McGlumphy, Burak Yilmaz, Julie A Holloway, Frank M Beck
PURPOSE: The purpose of this retrospective study was to investigate the relationship of specific prosthetic complications in patients with a maxillary complete removable dental prosthesis (CRDP) opposing a mandibular metal-resin implant-fixed complete dental prosthesis (MRIFCDP) with respect to anteroposterior (AP) spread and cantilever length. MATERIALS AND METHODS: Of the 46 patients contacted for this study, 23 patients responded. All patients had been treated with a maxillary CRDP and a mandibular MRIFCDP...
September 2015: International Journal of Prosthodontics
Kamal Bali, Richard W McCalden, Douglas D R Naudie, Steven J MacDonald, Matthew G Teeter
BACKGROUND: Although it is understood that backside damage occurs in polyethylene acetabular liners, the effect of highly crosslinked polyethylene, which has completely replaced conventional polyethylene, has yet to be examined. QUESTIONS/PURPOSES: The purpose of this study was to answer the following questions: (1) With conventional polyethylene (CPE), did the acetabular design make a difference in backside wear? (2) Is there a difference in backside damage between CPE and crosslinked polyethylene (XLPE) liners? (3) With XLPE, is the difference in backside wear between designs still present? (4) Is there any difference in backside damage in various zones on backside of individual liners? METHODS: This single-institution retrieval analysis involved visual damage scoring on the backside of 233 polyethylene liners implanted between 2002 and 2011...
February 2016: Clinical Orthopaedics and related Research
Barry S Rubel, Edward E Hill
When a patient presents with an implant with the internal threads damaged (or cross-threaded), a definitive restorative challenge may be faced. By having a difference in hardness between an abutment screw and the implant to which it is to be attached, there is potential for internal thread damage to the implant if the opposing threads do not interface properly. As such, the operator must use care when positioning the abutment and engaging the threads to prevent possible misalignment and damage to the internal aspect of the implant body...
April 2015: New York State Dental Journal
Kinji Noda, Hikaru Arakawa, Aya Kimura-Ono, Seiya Yamazaki, Emilio Satoshi Hara, Wataru Sonoyama, Kenji Maekawa, Kazuo Okura, Ayumi Shintani, Yoshizo Matsuka, Takuo Kuboki
PURPOSE: Many studies have identified risk factors for dental implant failure, although few have investigated the correlation among implant fixtures within single patients. A better analytical method may include repeated measures analysis including generalized estimating equations (GEE). This retrospective cohort study aimed to (1) identify the risk factors for failure of dental implantation and (2) evaluate an analytical method using GEE analysis. METHODS: We analyzed data on early and late implant failures in 296 patients providing 721 rough surface dental implants (2...
July 2015: Journal of Prosthodontic Research
Martin Rosentritt, Felix Heidtkamp, Helmut Hösl, Sebastian Hahnel, Verena Preis
OBJECTIVES: Removable dentures with different denture teeth may provide different performance and resistance in implant and gingival situations, or anterior and posterior applications. MATERIALS AND METHODS: Two situations of removable dentures were investigated: gingiva (flexible) and implant (rigid) bearing. For simulating the gingiva/jaw situation, the dentures were supported with flexible lining material. For the implant situation, implants (d = 4.1 mm) were screwed into polymethylenmethacrylate (PMMA) resin...
March 2016: Clinical Oral Investigations
Giuseppe Luongo, Eriberto Bressan, Maria Gabriella Grusovin, Ferdinando d'Avenia, Konrad Neumann, Luca Sbricoli, Marco Esposito
PURPOSE: To evaluate the influence of at least three abutment changes against the placement of a definitive abutment, which was no longer removed, on hard and soft tissue changes, and to compare the clinical outcomes of immediate non-occlusal loading versus conventional loading. MATERIALS AND METHODS: Eighty patients requiring one single crown or one fixed partial prosthesis supported by a maximum of three implants were randomised, after implants were placed with more than 35 Ncm, according to a parallel group design to receive definitive abutments which were loaded immediately (definitive abutment or immediate loading group) or transmucosal abutments which experienced delayed loading after 3 months and were removed at least three times: 1) during the making of the impression (3 months after implant placement); 2) when checking the zirconium core of titanium abutments at single crowns or the fitting of the metal structure at prostheses supported by multiple implants; 3) at delivery of the definitive prostheses (repeated disconnection or conventional loading group)...
2015: European Journal of Oral Implantology
Enrico F Gherlone, Paolo Capparé, Simona Tecco, Elisabetta Polizzi, Giuseppe Pantaleo, Giorgio Gastaldi, Maria Gabriella Grusovin
PURPOSE: The clinical trial aimed to evaluate the survival of implant-prosthetic rehabilitation in controlled HIV-positive patients. MATERIALS AND METHODS: This mono-centric study included HIV patients with a stable disease, requiring implant rehabilitation, with good oral hygiene. Each patient received at least one dental implant. After 90 days in the upper jaw and 60 days in the lower jaw, the appropriate prosthesis was delivered.Primary outcome measures were prosthetic failures, implant failures, peri-implant marginal bone level changes (MBLCs), and biological complications (peri-implantitis, pus, pain, paresthesia)...
August 2016: Clinical Implant Dentistry and related Research
Stefanie Kappel, Nikolaos Nikitas Giannakopoulos, Lydia Eberhard, Peter Rammelsberg, Constantin Eiffler
PURPOSE: The study aims to evaluate survival and incidence of complications for pairs of implants placed in the front region of edentulous mandibles and immediately loaded with either bar or Locator attachments. MATERIALS AND METHODS: Forty-six patients with edentulous mandibles (mean age 69.4 years at inclusion in the study; 73.9% male) received two implants in the interforaminal area of the symphysis. Dolder bar or Locator attachments, allocated randomly, were then attached immediately, and both clips and a framework were fastened to the denture by the dental technician within 72 hours...
August 2016: Clinical Implant Dentistry and related Research
Shawn T Joseph, Krishnakumar Thankappan, Rahul Buggaveeti, Mohit Sharma, Jimmy Mathew, Subramania Iyer
PURPOSE: Bilateral maxillectomy defects, if not adequately reconstructed, can result in grave esthetic and functional problems. The purpose of this study was to investigate the outcome of reconstruction of such defects. MATERIALS AND METHODS: This is a retrospective case series. The defects were analyzed for their components and the flaps used for reconstruction. Outcomes for flap loss and functional indices, including oral diet, speech, and dental rehabilitation, also were evaluated...
February 2015: Journal of Oral and Maxillofacial Surgery
C Fingerhut, H J Schindler, K Schweizerhof, B Kordass, J Lenz
OBJECTIVES: The primary goal of the present finite element (FE) analysis of a special removable prosthesis, the conical telescopic crown (CTC), was to validate established results based on a rigid model of the CTC and to analyze its characteristic features as a function of the essential material and geometric parameters. Furthermore, the effectiveness of a new element, the composite stop (CS), was investigated. MATERIALS AND METHODS: The study used an axisymmetric FE model containing the inner and outer crown including resin or ceramic veneer, the CS, the cement layer between the interior crown and the tooth, and the upper part of the tooth itself...
2014: International Journal of Computerized Dentistry
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