Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “Denture Repair”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 55 records · Page 3Linked to original sources
PubMed1998

Repair of acrylic resin denture base reinforced with glass fiber.

STATEMENT OF PROBLEM: The ultimate goal of any denture repair is to restore the original strength of the denture and to avoid further fracture. PURPOSE: This study investigated the strength and deflection of repaired acrylic resin joints reinforced with various glass fiber concentrations. MATERIAL AND METHODS: Transverse strength, maximum deflection, and modulus of elasticity of glass fiber-reinforced polymethyl methacrylate acrylic resin were studied with a 3-point load test on 54 intact specimens. Six concentrations of type B glass fiber specimens were prepared (n = 9 per each fiber group). Fractured joint margins were rounded, a 2-mm gap was placed between them, and then they were repaired with autopolymerizing acrylic resin and retested. RESULTS: Transverse strength, maximum deflection, and the stiffness of all joints were significantly lower after the repair. Among the groups tested, the units treated with 1% glass fiber displayed the highest transverse strength before and after repair. Modulus of elasticity of the repaired 1% fiber concentration units was enhanced by approximately 25% over those repaired but untreated with glass fiber (0% fiber).

Analysis of Variance↗
PubMed1997

An evaluation of self-cured and visible light-cured denture base materials when used as a denture base repair material.

The aim of this study was to compare some of the physical properties of a heat-cured, a self-cured and a visible light-cured acrylic resin, and to evaluate the suitability of visible light-cured resin as a repair material for dentures made of heat-cured acrylic resin. Transverse strength, surface hardness and impact strength were determined for the three materials and the efficiencies of light-cured and self-cured resins, when used as a repair material, were evaluated by testing the transverse strength of repaired heat-cured specimens 1 hour, 1 week and 1 month after repair. The results showed that the rigidity of specimens repaired with light-cured resin improved with longer water storage. However, their transverse strength reached a maximum after one day and was reduced after 1 month. The rigidity and transverse strength of specimens repaired with self-cured resin were not influenced significantly by water storage and the transverse strength was significantly higher than the light-cured repaired specimens.

Acrylic Resins↗
PubMed1994

Repair of denture base resins using visible light-cured materials.

Specimens of denture base resins were repaired with autopolymerizing and visible light-cured (VLC) repair materials. Flexural properties were measured and revealed that the highest strength and toughness of joint are obtained by the autopolymerizing repair material and are independent on the base resin. The VLC materials exhibited a lower repair strength (22% to 58%) and toughness (9% to 33%) than those of the autopolymerizing resin. No interaction between base and repair material was detected, which was attributed to poor adhesive bonding created at the interface.

Acrylic Resins↗
PubMed1992

Effect of repair surface design, repair material, and processing method on the transverse strength of repaired acrylic denture resin.

The transverse strengths of blocks of denture base acrylic resin repaired with autopolymerizing monomer and polymer and autopolymerizing monomer and heat-cured polymer were measured with a three-point bending test. Three repair joints were studied: butt, round, and 45-degree bevel. Three processing methods were used: bench cure, hydroflask with hot water for 10 minutes, and hydroflask with hot water for 30 minutes. The strengths of repairs made with round and 45-degree bevel joint designs were similar and significantly greater than those with a butt joint design. The strengths of repairs processed in a hydroflask for 10 minutes and 30 minutes were similar and significantly greater than those cured on the bench top. There was no difference in the strength of repairs made with autopolymerizing monomer and polymer and autopolymerizing monomer and heat-cured polymer.

Acrylic Resins↗
PubMed2001

Repair of denture base resins with visible light-polymerized reline material: effect on tensile and shear bond strengths.

STATEMENT OF PROBLEM: Triad visible light-polymerized (VLP) reline resin has the potential to repair denture bases from other resin systems with the elimination of flasking/deflasking procedures. PURPOSE: This study measured the tensile and shear bond strengths of Triad VLP, PMMA, and glass-fiber-reinforced PMMA (GF-PMMA) acrylic resins before and after repair with Triad VLP reline material. MATERIAL AND METHODS: Fifty-six specimens were fabricated from Triad VLP, PMMA, and GF-PMMA denture base resins. Both Triad VLP reline material and autopolymerizing acrylic resins were used to repair identical laboratory fabricated resin joints. Twenty-eight rectangular specimens (in 4 different groups of 7 each) were prepared to study the shear bond strength of Triad reline material used to repair different denture base resin joints. RESULTS: Statistically significant differences (P< .0001) were found between the tensile strengths of specimens repaired with the Triad VLP reline resin used as a repair agent and those repaired with the autopolymerizing resin. The tensile strength of the Triad VLP denture base resin was found to be higher than that of both the PMMA and GF-PMMA acrylic resins. CONCLUSION: The low tensile and shear bond strengths found after the repair of PMMA and GF-PMMA acrylic resins with Triad VLP reline material were attributed to a lack of cohesion/adhesion between the Triad VLP reline material and the interfaces of the treated sites. The use of Triad VLP reline material to repair Triad VLP denture base resin produced the highest strengths.

Acrylic Resins↗
PubMed1993

Microwave processing for denture relines, repairs, and rebases.

The microwave processing procedure has been shown to be an efficient and accurate method of polymerizing poly(methyl methacrylate) resin for the fabrication of dentures. This article describes procedures to expand the uses of the microwave technique. With standard laboratory procedures, the microwave technique can improve and simplify denture relines, repairs, and rebasing of partial dentures.

Denture Rebasing↗
PubMed1990

Adhesion monomers utilized for fixed partial denture (porcelain/metal) repair.

A technique is presented for repair of fatigue-fractured fixed partial dentures with an overlaid, bonded porcelain/metal repair. The repair techniques utilize recent advances in resin-to-metal and resin-to-porcelain adhesion. Clinical procedures are given for adhesion of repair castings to intraoral porcelain or metal surfaces. Metal surface preparation techniques depend on the chemistry of the metal and include intraoral tin plating of noble metals. Direct adhesion of composite resin luting agents is used for base metals.

Adhesives↗
PubMedDate not supplied

Simultaneous repair and rebase of a removable partial denture.

A patient presented a unique dental problem: the evulsion of mandibular canines, and the restoration of anterior alveolar bone associated with periodontal disease. A mandibular removable partial denture, bilaterally supported by the canines, premolars, and molar abutments of blade implants, had been worn for more than ten years. The open clasps in the canine areas were irritating the oral tissues, and the space under the anterior saddle of the denture was retaining food. Both situations needed immediate consideration. The evulsed canines were reproduced in autocured acrylic and secured in the clasps of the denture. The space under the saddle was rebased with autocured acrylic. Since both areas were adjacent to each other, they were splinted together simultaneously. The patient was satisfied with having the old denture repaired without being deprived of the prosthesis for an extended period of time.

Denture Rebasing↗
PubMed2001

Repair of denture base resin using woven metal and glass fiber: effect of methylene chloride pretreatment.

STATEMENT OF PROBLEM: A durable repairing system for denture base fracture is desired to avoid recurrent fracture. Purpose. This study evaluated the strength and modulus of elasticity of repaired acrylic specimens reinforced with various processes. MATERIAL AND METHODS: Transverse strength and modulus of elasticity of repaired acrylic denture base specimens were evaluated with a 3-point bending test and compared with a heat-polymerized control. Autopolymerizing acrylic resin was used with woven metal fiber and glass fiber with and without methylene chloride surface treatment (n = 6 per group). The specimens were cut in half and fixed in a metal mold to obtain a space for placing the repairing resin. A cavity was prepared when metal or glass fiber was used. All specimens were stored in 37 degrees C distilled water for 48 hours before the test. All data were statistically analyzed with 1-way ANOVA, and differences among groups were analyzed with Fisher test (P< or =.05). RESULTS: The mean value of the transverse strength for the control was 87.2 MPa. The specimens repaired by glass fiber with methylene chloride surface treatment exhibited the highest transverse strength (96.8 MPa), which was significantly higher than that of the control (P< or =.05). The elastic modulus of the specimens repaired by glass fiber with methylene chloride surface treatment (4189.3 MPa) was significantly greater than that of the control (2683.7 MPa) at a 95% level of confidence. The values of transverse strength and elastic modulus were highest when the surface treatment was combined with a reinforcing glass fiber. CONCLUSION: Reinforcement with glass fiber and methylene chloride pretreatment produced transverse strength and a modulus of elasticity higher than the control.

Acrylic Resins↗
PubMed2000

Denture satisfaction and clinical performance in a paediatric population.

OBJECTIVES: The objectives of this study were to investigate the clinical performance of partial upper dentures in children and to assess reported denture satisfaction in this young population. DESIGN: This was a retrospective study using patients' dental records in conjunction with a postal questionnaire. SETTING: The Paediatric Dentistry Clinic, School of Clinical Dentistry, Sheffield. SAMPLE AND METHODS: Fifty-eight children (aged 7-17 years) who had been provided with a partial upper denture to replace one or more missing permanent incisors were included in the study. The patients' dental records were examined for the following details: tooth type missing, presence of retained incisor roots, aetiology of tooth absence, age at which the denture was first provided, total time period dentures had been worn, and frequency and type of any denture repairs or replacements. Next a short questionnaire was sent to each child, which sought an evaluation of several parameters of denture satisfaction including: overall attitude towards wearing a denture, denture appearance, ease of eating, comfort and perceived degree of teasing from peers. Visual analogue scales (VAS) were employed to provide a graded response. RESULTS: 70.7% of subjects had a single missing incisor and trauma was the most common cause of tooth loss (77.3%). The mean age at which patients started wearing a denture was 11.6 years and the mean length of time dentures had been worn, at the time of the investigation, was 2.1 years. A 'T-shaped' denture was most commonly employed (77.5% of dentures). Overall, 36.2% of subjects had required at least one denture repair, 28.2% presenting within a year of denture provision. One or more denture replacements had been received by 60.3% of the patients, and 43.6% had required this within a year. Component failure was highest for the denture tooth (40% of repairs) and a change in the patient's dentition necessitated a denture remake in 66% of cases. VAS scores for parameters of denture satisfaction indicated an overall positive evaluation of the dentures, with the most positive response relating to ease of eating. However, the reported degree of teasing was high and increased with time. The only significant difference for denture satisfaction according to gender was for mastication: girls reportedly found eating easier than did boys. CONCLUSION: Children are generally accepting of upper partial dentures, but their poor clinical performance is of concern and there is need for improvement.

Adaptation, Psychological↗
PubMedDate not supplied

Denture treatment needs of an overdenture population.

Cross-sectional and longitudinal studies have identified that persons wearing overdentures require regular care and maintenance of their dentures and their remaining dentition. This paper reports on a longitudinal study of the denture treatment needs of 284 dentures placed in 254 patients seen over a period of 12 years. At placement of the overdentures, baseline measurements and photographs were made by a single examiner. These measurements included evaluation of the restorations, abutment height above the gingival margin, periodontal probing depths, and oral hygiene. Denture status was evaluated by examining stability, retention, the integrity of the denture bases, and the relationship of the teeth in centric occlusion. Denture hygiene was also assessed. Based upon this examination, the subjects' denture treatment needs were determined. The majority of overdentures were well tolerated, and in general the patients were satisfied with their dentures. The most common denture treatment need was cleaning, followed by adjustment of the denture bases. Relining was a more common problem in the mandibular arch than in the maxillae. The need for occlusal adjustment did not seem to be a problem after the fifth year, but this might have been because of replacement of worn teeth or dentures. The majority of denture repairs were necessitated before the sixth year. Patients who received immediate dentures did not have greater treatment needs. Looseness of the dentures was the primary complaint, followed by sore teeth and denture-bearing tissues. In spite of their complaints, the great majority of the patients were satisfied with their overdentures.

Adolescent↗