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At least 73 records · Page 4Linked to original sources
PubMed1994

A randomized clinical trial of two basic removable partial denture designs. Part I: Comparisons of five-year success rates and periodontal health.

A randomized clinical trial was undertaken to compare the effectiveness of two partial denture designs, one with I-bar (bar) and the other with circumferential retainers (circumferential), in 134 patients with Kennedy class I and class II edentulous conditions. A total of 30 partial dentures were considered failures, five because of abutment failures and 25 because of the lack of removable partial denture use for eating. The 5-year success rate of 71.3% for the circumferential design did not differ significantly from the 76.6% for the bar design (p > 0.05). There were no discernible changes in the nine periodontal health components of abutment teeth with either of the two designs after 60 months. The results indicate that the two designs do not differ significantly in terms of success rates, maintenance care, and effects on abutment teeth. A well-constructed removable partial denture of either design, supported by favorable abutments and accompanied by a regular recall program offers a satisfactory treatment modality.

Alveolar Bone Loss↗
PubMed1990

A clinical view of mandibular premolars in removable partial denture design.

Mandibular premolars are used as a model to discuss various strategies for the design of removable partial dentures. Factors that must be taken into consideration as the prosthesis is designed, such as coronal and radicular anatomy of the abutment teeth, the relationship of the abutment teeth to other teeth, and the presence of existing restorations, are also identified.

Bicuspid↗
PubMedDate not supplied

Knowledge-based systems, removable partial denture design and the development of RaPiD.

Knowledge-based systems (KBS), otherwise and formerly known as 'expert systems', are computer programs that contain a representation of knowledge that can be used to solve problems normally requiring human intelligence. This article discusses the contributions such systems can make to medicine and dentistry, indicates the range of existing dental KBSs and gives reasons why removable partial denture (RPD) design has attracted so much attention in this respect. A description is also given of the 'RaPiD' system for designing RPDs at the chairside.

Computer-Aided Design↗
PubMed1997

A randomized clinical trial of two basic removable partial denture designs. Part II: Comparisons of masticatory scores.

STATEMENT OF PROBLEM: There is no known data on the functional efficacy of different removable partial denture designs. PURPOSE: This randomized clinical trial compared the masticatory performance of two commonly used designs in 118 patients who needed a unilateral or bilateral mandibular partial denture. MATERIAL AND METHODS: One half of the patients received a partial denture with distal occlusal rests and cast circumferential clasps and the other half a partial denture with mesial rests and I-bar cast clasps. The left side, right side, and swallowing threshold masticatory tests were made with peanuts and carrots before treatment and 16 weeks after the prosthesis insertion (baseline) and thereafter at 6, 18, 36, and 60 months. RESULTS: Masticatory scores at entry were higher in the circumferential design group, but the only significant (p < 0.05) difference was found in the right side carrot performance. Both groups realized significant improvements (p < 0.001) in all performance scores with partial dentures. Mean improvements of 24.7 with peanuts and 35.8 with carrots in the right side performance scores and 19.0 in the swallowing threshold score with peanuts in the bar design group were significantly higher (p = 0.017) than the respective mean improvements of 15.9, 21.4, and 5.6 in the circumferential design group. However, no significant differences were found between the two groups for any of the 10 performance scores at baseline. CONCLUSIONS: Despite some performance differences at entry, the mean performance scores for the two groups became similar at baseline and at subsequent intervals.

Arachis↗
PubMed1979

Root retention and removable partial denture design.

The position of a retained root for preservation of a ridge requires modification of the design of a distal-extension removable partial denture on the side of the retained root. A model with silicone rubber over the ridges and simulated retained roots was fabricated. A framework with mesial rests, distal proximal plates, and I-bar clasp arms was fitted to it. A pencil lead was attached to the framework to record the arcs of rotation of the I-bar clasp arm. The movements and the fulcrums of the prosthesis were changed by the presence of simulated retained roots posterior to the distal abutment.

Dental Abutments↗
PubMed1982

Rotational path removable partial denture design.

A detailed description of a rotational path of insertion design for removable partial dentures has been presented. By minimizing the use of conventional clasps, this technique offers some advantages. Rotational path designs may minimize adverse periodontal response to a removable partial denture by reducing plaque accumulation and may be applied in esthetically demanding situations. The design concept involves the use of rigid retentive components that gain access to undercut areas through a rotational path of insertion. These rigid components satisfy the basic requirements of conventional direct retained design.

Denture Design↗