Podshadley A G
Department of Reconstructive Dentistry, University of Louisville, School of Dentistry, Ky.
J Prosthet Dent. 1989 Feb;61(2):169-73. doi: 10.1016/0022-3913(89)90367-3.
The force required to remove three threaded retention pins from composite resin and the pin length for optimum retention were determined. TMS Minuta, TMS Minikin, and TMS Minim pins were tested. Composite resin materials used were representative of large particle, small particle, and microfilled type materials. Results demonstrate that the Minim pin of 2 mm length is the optimum pin for use with large- and small-particle composite resin. However, microfilled composite resin requires a 2.25 mm length of the Minim pin for optimum retention. Minuta and Minikin pins are removed with only a small amount of force and should be used only when clinical prudence requires a small pin. When these tiny pins are used, the strongest possible composite resin should be selected.
测定了从复合树脂中取出三根螺纹固位钉所需的力以及实现最佳固位效果的钉长度。对TMS Minuta、TMS Minikin和TMS Minim钉进行了测试。所使用的复合树脂材料分别代表大颗粒、小颗粒和微填料型材料。结果表明，长度为2毫米的Minim钉是用于大颗粒和小颗粒复合树脂的最佳选择。然而，微填料复合树脂需要2.25毫米长的Minim钉才能实现最佳固位。Minuta和Minikin钉只需很小的力就能取出，只有在临床谨慎需要小尺寸钉时才应使用。当使用这些小尺寸钉时，应选择强度尽可能高的复合树脂。
