The size of occlusal rest seats prepared for removable partial dentures

Culwick, P.; Howell, Peter; Faigenblum, M J

doi:10.1038/sj.bdj.4800757a

Cited by 8 publications

(16 citation statements)

References 12 publications

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“…Evaluation: A minimum buccolingual width of 2.0 to 2.5 mm 7,10,14 and maximum buccolingual width of one‐third of the crown 12 or half the distance between the cusp tips 9,11,13 have been suggested (preparatory stage).…”

Section: Evaluation Of the Occlusal Rest Sizementioning

confidence: 99%

“…Evaluation: The recommended mesiodistal length is one‐third to one‐half of the crown 11–13 (preparatory stage).…”

Section: Evaluation Of the Occlusal Rest Sizementioning

confidence: 99%

“…Evaluation: Occlusal rest seats are expected to be saucer‐ 12,13 or spoon‐shaped 7–9,11,14,15 depressions (preparatory stage).…”

Section: Evaluation Of the Occlusal Rest Shapementioning

confidence: 99%

“…There are four factors that determine support and retention of the occlusal rest: (1) fit, 1 (2) size, 7–14 (3) shape, 7–9,11–16 and (4) location of the occlusal rest seat 3 . In this article, we will discuss methods to clinically evaluate each of these four factors and suggest procedures to correct the support function of RPDs.…”

mentioning

confidence: 99%

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Systematic Clinical Evaluation and Correction Procedures for Support of Removable Partial Dentures

Sato

Shimodaira

Kitagawa

2007

Journal of Prosthodontics

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Support, retention, and bracing are the three main functions of a direct retainer in removable partial dentures (RPDs). RPDs must have sufficient supporting ability for proper occlusal rehabilitation. Support ability depends on the fit, size, shape, and location of the occlusal rest. Support cannot be adjusted chairside in most cases. The purpose of this article is to present systematic evaluation criteria for support in an RPD and to describe methods for adjusting cast clasps with improper support. Appropriate design of RPDs and preparation of abutments are also described.

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Section: Evaluation Of the Occlusal Rest Sizementioning

confidence: 99%

“…Evaluation: The recommended mesiodistal length is one‐third to one‐half of the crown 11–13 (preparatory stage).…”

Section: Evaluation Of the Occlusal Rest Sizementioning

confidence: 99%

“…Evaluation: Occlusal rest seats are expected to be saucer‐ 12,13 or spoon‐shaped 7–9,11,14,15 depressions (preparatory stage).…”

Section: Evaluation Of the Occlusal Rest Shapementioning

confidence: 99%

mentioning

confidence: 99%

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Systematic Clinical Evaluation and Correction Procedures for Support of Removable Partial Dentures

Sato

Shimodaira

Kitagawa

2007

Journal of Prosthodontics

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“…There have been some, albeit limited, studies and descriptions on the size and shape of occlusal rests. Based on the available literature, rests should be of spoon or saucer shape (14, 15) with some descriptions that they should at the minimum be 2–2·5 mm wide bucco‐lingually, with a maximum width of ⅓ of the tooth crown; mesio‐distally they should be between ⅓ and ½ of the crown and should be of a thickness between 1 and 1·5 mm (16). Another study (17) concluded that rests of 2 mm length and 1 mm width should be at least 1·46 mm thick; however, if the width of the rest is increased to 2 mm, then the thickness can be reduced to 1·03 mm (Fig.…”

Section: Introductionmentioning

confidence: 99%

Tooth preparation for rest seats for cobalt-chromium removable partial dentures completed by general dental practitioners

Rice

Lynch

McAndrew

et al. 2010

Journal of Oral Rehabilitation

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The aim of this project was to examine tooth preparations made by general dental practitioners (GDPs) for occlusal and cingulum rest seats for cobalt-chromium removable partial dentures (RPDs). Master casts and prescribed denture designs for cobalt-chromium RPDs produced by a commercial dental laboratory from impressions made by 45 GDPs across Wales were evaluated over a period of 5 months. Rest seats and associated interocclusal clearances were assessed using pre-determined criteria. A total of 68 casts were examined. Of these, 33 did not have rest seats included in their prescription. Of the remaining 35 casts, 81 rests had been prescribed of which only 24 (30%) had signs of tooth preparations for these rest seats. Using pre-determined criteria, 60% of rest seats were under-prepared in the mesio-distal plane and 30% were over-prepared in the bucco-lingual plane. In 17 cases where natural teeth opposed the rest seat, the mean interocclusal clearance was 1·5 mm (range 0·6-3·5 mm) with 6 of the 17 rests (35%) being less than the recommended thickness. In total, 18 of the 24 rests prepared did not meet the criteria, and 11 of the 21 rests prescribed had no obvious preparation and insufficient occlusal clearance. Where prescribed, the majority of rests did not meet the identified criteria. The rest seat preparations varied greatly in all planes including the interocclusal clearance. Further emphasis should be given to aspects of denture design in undergraduate and continuing education programmes for dentists.

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Evaluation of Occlusal Rest Seats With 3D Technology in Dental Education

Sampaio-Fernandes

Fonseca

et al. 2015

Journal of Dental Education

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The preparation of rest seats must comply with speciic sizes and shapes. Various technological systems such as Kavo PrepAssistant have been used as an auxiliary method to evaluate preclinical preparations more objectively. The aims of this study were to establish an alternative system for evaluating occlusal rest seats and to compare different types of assessment. Seventysix undergraduate students at Oporto University Faculty of Dental Medicine in Portugal were selected as a convenience sample to prepare two occlusal rest seats in Kavo teeth #45 and #46 (FDI World Dental Federation ISO-3950) and were randomly assigned to two groups. Bearing in mind the ideal characteristics of rest seats, the investigators deined ten assessment parameters, and their evaluation weights were independently estimated by three evaluators. Four of these parameters were measured in Kavo PrepAssistant. The results of the different evaluation methods and evaluators varied considerably. The classical evaluation presented inal results worse than those of the evaluations using parameters. In this study, carrying out the assessment with Kavo PrepAssistant helped to achieve a more objective and less evaluator-dependent inal evaluation.Dr. Manuel Sampaio-Fernandes is an MSc student,

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The size of occlusal rest seats prepared for removable partial dentures

Cited by 8 publications

References 12 publications

Systematic Clinical Evaluation and Correction Procedures for Support of Removable Partial Dentures

Systematic Clinical Evaluation and Correction Procedures for Support of Removable Partial Dentures

Tooth preparation for rest seats for cobalt-chromium removable partial dentures completed by general dental practitioners

Evaluation of Occlusal Rest Seats With 3D Technology in Dental Education

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