PubMed · 13220654
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L MOLNAR. 1954. [Prostheses for the deciduous teeth].. https://pubmed.ncbi.nlm.nih.gov/13220654/
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All practitioners wish for success in their restorative work mainly due to their desire to do the best for their patients, but increasingly the achievement of success, ie the avoidance of failure, is felt to be necessary to avoid the spectre of litigation. The number of patient-led litigation cases is on the increase and the majority involve crown and bridge work.
Theoretical and clinical studies of resistance form are reviewed, supporting the basic prosthodontic principle that resistance form is an essential element in preparation design. Concepts of the"on-off" nature of resistance form, its application in guidelines for minimally acceptable preparation taper, and the controversy over whether there is a relationship with clinical success or failure are discussed. It is more challenging to obtain resistive molar preparations than resistive anterior preparations, and uneven preparation margins can make parallel 0 degree taper preparations lack resistance form. The usefulness of grooves, especially in molar preparations with uneven margins, is illustrated. The Lewis and Zuckerman techniques for evaluating resistive areas of a preparation are shown to be consistent with each other but not with the Weed method.
Endodontically treated teeth have lost substantial tooth structure as a result of previous restorations, dental caries, and the access preparation for the endodontic therapy. The topic of restoring these teeth is complex and controversial, and their long-term prognosis is directly connected to the quality of the final restoration. This article describes contemporary knowledge of the biomechanical principles related to the restoration of pulpless teeth and provides a critical review of currently available materials and methods.