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Principles of clasp retention: a review
Author(s) -
Chrystie J. A.
Publication year - 1988
Publication title -
australian dental journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.701
H-Index - 71
eISSN - 1834-7819
pISSN - 0045-0421
DOI - 10.1111/j.1834-7819.1988.tb00648.x
Subject(s) - dentures , component (thermodynamics) , work (physics) , psychology , orthodontics , dentistry , computer science , medicine , engineering , mechanical engineering , physics , thermodynamics
A review is provided of various theories of the ways in which clasps act to retain removable partial dentures. The claimed roles of each component of a clasp‐unit are examined. The use of undercuts, paths of withdrawal, guide planes and the relationship between retentive‐force and work needed to deform the retentive arm are reviewed. Oversimplifications related to ‘classic theories’ are highlighted and the need for reciprocation is questioned.