PubMed · 6928198
Self-threading pin penetration into dentin.
Abstract
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.
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T A Garman, P P Binon, D Averette, R G Talman. 1980. Self-threading pin penetration into dentin.. https://doi.org/10.1016/0022-3913(80)90405-9
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