Evaluation of photoelastic stress patterns produced by various designs of bilateral distal-extension removable partial dentures

The results of this study showed that: 1. The design of a retainer with a mesial rest in conjunction with a buccal I-bar or a wrought-wire and cast lingual arm exhibited the most favorable distribution of vertically applied forces. 2. Retainer designs with a distal rest tend to move the clinical cro...

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Bibliographic Details
Published in:	The Journal of prosthetic dentistry Vol. 38; no. 3; p. 261
Main Authors:	Thompson, W D, Kratochvil, F J, Caputo, A A
Format:	Journal Article
Language:	English
Published:	United States 01-09-1977
Subjects:	Chromium Alloys Dental Abutments Dental Stress Analysis Denture Bases Denture Design Denture, Partial, Removable Humans Models, Anatomic Models, Biological Periodontium - anatomy & histology Periodontium - physiology Plastics
Online Access:	Get more information
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Summary:	The results of this study showed that: 1. The design of a retainer with a mesial rest in conjunction with a buccal I-bar or a wrought-wire and cast lingual arm exhibited the most favorable distribution of vertically applied forces. 2. Retainer designs with a distal rest tend to move the clinical crown distally and the root mesially at the apex, resulting in horizontal forces in the bone. 3. Placing rests of distal-extension removable partial dentures more anteriorly provides an axis of rotation that directs applied forces in a more vertical direction. 4. The distal rest in conjunction with circumferential retainers developed greater horizontal forces within the supporting structures.
ISSN:	0022-3913
DOI:	10.1016/0022-3913(77)90303-1