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Self-threading pin penetration into dentin. 1980

T A Garman, and P P Binon, and D Averette, and R G Talman

A laboratory study has shown that the first-half of self-shearing 2-in-1 self-threading pins, sizes 0.031 inch and 0.024 inch, fail to reach full channel depth when placed with either a hand wrench or an Auto Klutch handpiece. The average discrepancy of penetration is about 0.75 mm. This discrepancy in seating results in a significant excess pin length extending into the tooth preparation, which compromises the strength characteristics of the amalgam restoration.

UI MeSH Term Description Entries
D003723 Dental Amalgam An alloy used in restorative dentistry that contains mercury, silver, tin, copper, and possibly zinc. Amalgam, Dental,Amalgams, Dental,Dental Amalgams
D003737 Dental Cavity Preparation An operation in which carious material is removed from teeth and biomechanically correct forms are established in the teeth to receive and retain restorations. A constant requirement is provision for prevention of failure of the restoration through recurrence of decay or inadequate resistance to applied stresses. (Boucher's Clinical Dental Terminology, 4th ed, p239-40) Cavity Preparation, Dental,Cavity Preparations, Dental,Dental Cavity Preparations,Preparation, Dental Cavity,Preparations, Dental Cavity
D003772 Dental Pins Small cylindrical pieces of metal used to enhance retention. Dental Pegs,Dental Peg,Dental Pin,Peg, Dental,Pegs, Dental,Pin, Dental,Pins, Dental
D003799 Dental Stress Analysis The description and measurement of the various factors that produce physical stress upon dental restorations, prostheses, or appliances, materials associated with them, or the natural oral structures. Analyses, Dental Stress,Analysis, Dental Stress,Stress Analyses, Dental,Stress Analysis, Dental,Dental Stress Analyses
D003804 Dentin The hard portion of the tooth surrounding the pulp, covered by enamel on the crown and cementum on the root, which is harder and denser than bone but softer than enamel, and is thus readily abraded when left unprotected. (From Jablonski, Dictionary of Dentistry, 1992) Dentine,Dentines,Dentins
D013499 Surface Properties Characteristics or attributes of the outer boundaries of objects, including molecules. Properties, Surface,Property, Surface,Surface Property

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