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Results for “Denture, Partial”

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At least 613 records · Page 34Linked to original sources

PubMed1993

Longitudinal study on torque transmitted from denture base to an abutment tooth of lower distal-extension removable partial dentures with conus crown telescopic system.

The purpose of this study was to make a longitudinal analysis of torque transmitted to a direct abutment tooth of a lower distal-extension removable partial dentures constructed with the conus crown telescopic system. Torque around the vertical and lateral axes of the tooth were measured during chewing of food at the time of insertion of the new dentures to about three months after. The maximal mean value of torque (Max.MT) was calculated from the peak level of all chewing strokes at the minimum of the interocclusal distance. The integration values of torque (I) and time (T) from initiation of chewing to swallowing were obtained, then the average value of torque (Ave.T) was calculated (Ave.T = I/T). The results are summarized as follows: (a) There were no remarkable changes of Max.MT around the both axes; (b) Max.MT around the lateral axis was 7-47 x 10(-3) kgm (mean: 25 x 10(-3) kgm) (1 kgm = 9.8 Nm) in the downward direction and Ave.T around the lateral axis was 6-14 x 10(-3) kgm ss-1 (mean: 10 x 10(-3) kgm ss-1) in the downward direction; (c) There were marked differences of Max.MT and Ave.T around the vertical axis between subjects. Max.MT around the vertical axis was less than 24 x 10(-3) kgm and Ave.T around the vertical axis was less than 6 x 10(-3) kgm ss-1.

Aged↗

PubMed1991

Porcelain-metal pontics for removable partial dentures.

A custom-made porcelain-fused-to-metal ring pontic for a removable partial denture may be color characterized and glazed by use of familiar procedures. The use of this type of pontic on removable partial dentures has the potential of superior esthetic results when replacing isolated maxillary anterior teeth.

Dental Alloys↗

PubMed2002

Future needs for fixed and removable partial dentures in the United States.

STATEMENT OF PROBLEM: Because of the decline in missing teeth among most adults, prosthodontic advanced training programs are concerned about the need for prosthodontics in the future. PURPOSE: An analysis was conducted to project the unmet need for fixed and removable partial dentures in the years 2005, 2010, and 2020. MATERIAL AND METHODS: Unmet need was calculated as follows: Total need equals the number of persons in each age cohort multiplied by the percentage who need a fixed or removable partial denture multiplied by the average procedure time required to provide the service. Total unmet need then equals total need minus the annual supply of prosthodontic services delivered by prosthodontists and general practitioners. RESULTS: Projected results indicate that total unmet need will increase from 488 million hours in 2005 to 517 million hours in 2010 and to 560 million hours in 2020. CONCLUSION: The significance of the results is that unmet prosthodontic need will increase and exceed the supply of services for the foreseeable 20-year future. Practicing dentists will find that a sizable minority of the population will continue to need fixed and removable partial denture services.

Adult↗

PubMed2001

Chairside prefabricated fiber-reinforced resin composite fixed partial dentures.

The introduction of pre-impregnated fiber-reinforced resin composites has provided the dental profession with the opportunity to fabricate and deliver adhesive, esthetic, and metal-free tooth replacements. Utilizing this technology, a prefabricated fiber-reinforced resin composite fixed partial denture prototype that allows rapid, cost-effective, and noninvasive fixed tooth replacement for single anterior teeth has been developed. Ideal situations for this type of service include: a fixed replacement following tooth loss from trauma; a fixed tooth replacement in medically compromised patients who cannot sit for extended periods of time or have local anesthesia; periodontally compromised abutments; a fixed space maintainer following orthodontic movement; and a fixed provisional during the post implant healing phase prior to loading. This article describes the framework construction and placement protocol for the prefabricated fiber-reinforced resin composite fixed partial denture.

Composite Resins↗

PubMed1989

Cast restorations made to existing removable partial dentures.

Procedures for the fabrication of complete cast and ceramometal restorations that support existing removable partial dentures are reviewed. Clinical and laboratory procedures are presented. These techniques allow the patient to continue to function with the existing removable partial denture while the restorations are made.

Acrylic Resins↗

PubMed2001

A review of 243 errors possible during the fabrication of a removable partial denture: part I.

Everyone who participates in any step of the fabrication of a removable partial denture must share in the success or failure of the restoration. Some seemingly innocuous deviations can be accumulative and cause serious problems, so everyone should review the procedures that they use on a regular basis. Parts I through III of this article present a personal and generic (but by no means comprehensive) list of errors that can occur when a removable partial denture is fabricated. Results that can be attributed to these errors are identified, and a possible solution for each error is described. This information is useful to the entire dental team: the dentist, dental assistant, office manager, and dental technician. The articles also include 18 notes that may be beneficial to personnel in the office and/or in the laboratory.

Alginates↗

PubMed2005

Abutment load transfer by removable partial denture obturator frameworks in different acquired maxillary defects.

STATEMENT OF PROBLEM: Excessive stress on abutment teeth adjacent to a maxillary resection defect during loading of partial denture obturator frameworks may shorten the life of the teeth. PURPOSE: The aim of this study was to photoelastically compare the forces exerted on the supporting structures of abutment teeth in 3 differently sized surgical resections with removable partial denture designs used to restore such maxillectomy defects. MATERIAL AND METHODS: Composite photoelastic models were constructed of a human maxilla that had undergone each of 3 maxillectomies: partial, radical, and radical involving the contralateral premaxilla. The abutment teeth included all remaining anterior teeth, the first premolar, and second molar, except the radical maxillectomy, which included the contralateral premaxilla where all remaining teeth were used as abutment teeth. All abutment teeth were restored with complete metal crowns, and removable partial denture frameworks were fabricated. Loading zones were selected according to the resection, and a 10-lb load was applied at each load point. The resulting stresses were observed and recorded photographically in a circular polariscope. The 2 teeth adjacent to the resection were then splinted, and the loading regimens were repeated. RESULTS: Without splinting, loads closer to the defect produced lingual tipping of the teeth adjacent to the resection and a mesial tipping tendency of the second molar. The tipping effects were greatest in the model with the largest resection. Splinting reduced tipping of the teeth adjacent to the resection and produced more uniform stress around these 2 abutment tooth roots for all of the models. CONCLUSION: The results of this in vitro study suggest that splinting the 2 teeth adjacent to a resection defect improves stress distribution around the roots during loading. This could increase the clinical life of the abutment teeth.

Birefringence↗

PubMed1985

The acid-etched fixed partial denture: a two-year report.

A 2-year report on 10 acid-etched fixed partial dentures was presented. Similar to other studies, it indicates that the acid-etched fixed partial denture is a clinically acceptable restoration for properly selected patients.

Acid Etching, Dental↗

PubMed2004

A systematic review of the survival and complication rates of fixed partial dentures (FPDs) after an observation period of at least 5 years.

OBJECTIVES: The objective of this systematic review was to assess the survival of cantilever fixed partial dentures (FPDs) and the incidence of biological and technical complications. METHODS: An electronic MEDLINE search supplemented by manual searching was conducted to identify prospective and retrospective cohort studies on FPDs with a mean follow-up time of at least 5 years. Patients had to have been examined clinically at the follow-up visit. Assessment of the identified studies and data abstraction was performed independently by two reviewers. Failure and complication rates were analyzed using random-effects Poisson regression to obtain summary estimates of 10-year survival proportions. RESULTS: From a yield of 3658 titles and 211 abstracts, 81 articles were selected for full-text analysis, finally resulting in 13 studies that met the inclusion criteria. Meta-analysis of these studies resulted in an estimated survival rate of cantilever FPDs of 81.8% (95 percent confidence interval (95% CI): 78.2-84.9%) and success rate (free of all complications) of 63% (95% CI: 54.7-70.2%) after 10 years. The most common biological complication was loss of pulp vitality (32.6%) followed by caries at abutment teeth (9.1%). After a 10-year observation period 2.6% of the FPDs were lost as a result of dental caries and 1% due to recurrent periodontitis. The most frequent technical complication was loss of retention (16.1%) followed by material fractures (5.9%). The cumulative incidence of fractures of abutment teeth was 2.9% and 2.4% of the FPDs were lost as a result of abutment tooth fracture after an observation period of 10 years. CONCLUSION: This systematic review on cantilever fixed partial dentures indicated that survival and success rates of cantilever fixed partial dentures were lower than those of conventional end-abutment supported FPDs described in a review by Tan et al. (2004) and biological and technical complications were frequent.

Algorithms↗

PubMed1990

[Effect of partial dentures on the residual dentition and the periodontium].

The data of 969 dental arches replaced by partial denture, and 1282 dental arches of the same edentulousness but unreplaced, examined in an unselected population, have been analyzed from the point of view of the occurrence frequency of the gingivitis, the pocket, the movability and the caries. It has been stated that the effect of the prosthesis of the remaining teeth may be evaluated only by comparison with a suitable control group with no dentures. Furthermore, it has been stated that the remaining teeth are not damaged by well planned partial dentures (with metal base plates) while the wrongly planned dentures (with plastic base plates) develop a significant damaging effect.

Denture, Partial, Removable↗

PubMed2003

Removal of a metal-ceramic fixed partial denture with a loose retainer.

In clinical practice, it is necessary to remove a ceramic-veneered fixed partial denture when an abutment becomes loose. When possible, the fixed partial denture is removed in a single piece, allowing recementation when appropriate. A 1-piece removal is challenging, often putting the veneer and abutment teeth at risk for damage. This article describes a technique for fabricating and using a 2-piece matrix that both protects the prosthesis and better directs removal forces along the long axis of the abutments.

Acrylic Resins↗

PubMed1979

Effect of age and removable partial dentures on gingivitis and periodontal disease.

The periodontal disease variables manifested in the individuals with partial dentures were more severe, which suggests that the contribution of denture status is significant. Age, while related to increased bone loss, did not appear to be of significance. Common sense suggests that poor oral hygiene in persons wearing removable partial dentures also is a contributing factor.

Adult↗

PubMed2002

A provisional fixed partial denture that simulates gingival tissue at the pontic-site defect.

A technique is presented for the fabrication of an esthetic, provisional fixed partial denture that compensates for a pontic-site ridge defect. This provisional restoration enables both the dentist and the patient to evaluate whether this prosthetic approach will adequately camouflage the pontic-site defect or whether surgical correction of the pontic site should also be considered.

Acrylic Resins↗

PubMed2006

A new design for all-ceramic inlay-retained fixed partial dentures: a report of 2 cases.

In a previous clinical study, all-ceramic resin-bonded 3-unit inlay-retained fixed partial dentures (IRFPDs) had a significantly worse outcome in the posterior region than did crown-retained 3-unit FPDs made from the same material. Debonding or fractures were causes of failure. To improve the clinical outcome of IRFPDs, a new framework design was developed: (1) The inlay retainers were made out of CAD/CAM-manufactured zirconia ceramic to improve fracture resistance, and additional veneering of the inlays was omitted. (2) The inlay retainers were completed with a shallow occlusal inlay (1-mm minimum thickness) and an oral retainer wing (0.6-mm minimum thickness). The wings were designed to reduce stress on the inlay retainer caused by torsion forces when the FPD is loaded nonaxially and to increase the enamel adhesive surface area. The pontic was circumferentially veneered with feldspathic porcelain. The clinical and laboratory procedures of this new treatment modality are described, and 2 exemplary clinical cases are presented. This new preparation and framework design might improve the clinical outcome of all-ceramic resin-bonded IRFPDs. However, adequate evidence of long-term safety and efficacy is required before this new design can be recommended for general clinical practice.

Adult↗

PubMed1991

The effect of connector design on cement retention in an implant and natural tooth-supported fixed partial denture.

This study investigated the effect of connector design, rigid or nonrigid, on cement retention in a combined implant and natural tooth-supported fixed partial denture. A prepared natural tooth was placed in a Plexiglas block in a manner that it could move approximately the same as a healthy premolar. An endosseous implant was placed in the block so that it was immobile. Joining the prepared tooth and implant was a fixed partial denture that could be made rigid or nonrigid. The natural tooth retainer was cemented to the prepared tooth, and the implant retainer was affixed to the implant fixture with a gold screw. One year of stress was applied to the fixed partial denture by a force simulation machine. Twenty randomly ordered tests were completed, 10 of each connector design. Retentive values for the cemented retainers were recorded and statistically compared by use of Student's independent t test. No significant difference in cement retentive strength between designs was found (p less than 0.05).

Bicuspid↗

PubMed1987

The cantilever fixed partial denture: a 10-year follow-up.

A 10-year study of patients with cantilever fixed partial dentures suggests that these prostheses can be used for both anterior and posterior replacements. Guidelines for cantilever prostheses are described. Fixed cantilever prostheses are favorable alternatives to certain types of unilateral removable partial dentures. Proper oral hygiene is essential.

Adult↗

PubMed1977

Stabilizing a removable partial denture framework on the master cast.

This technique aids the dentist in obtaining stable removable partial dentures. Failure to fill the space between the tissue stops of the retention mesh and the dental cast with cold-cure acrylic resin may result in the distortion and displacement of the removable partial denture framework during processing.

Acrylic Resins↗

PubMed1993

Five-year study of all-porcelain veneer fixed partial dentures.

Improvements in enamel-dentinal bonding systems combined with the introduction of new ceramics have encouraged replacement of missing anterior teeth in specific patients with porcelain veneer fixed partial dentures. Metal substructures are not needed, and more natural tooth structure can be preserved because the preparation of abutments is conservative. Twelve porcelain veneer fixed partial dentures were monitored for 5 years, and fractures attributed to degradation of the gingival margins occurred in the veneer surface of the fixed partial dentures. The success rate of 75% was dependent on rigid patient selection criteria, strength of the major connectors, and precise adjustment of occlusion to prevent overloading. The failing margins were attributed to the degeneration, attrition, and deterioration of the composite resin cements. Despite these limitations, patients were extremely satisfied with the esthetics. Improvement in the mechanical properties of composite resin cement will ameliorate the prognosis with this approach.

Composite Resins↗