Orkin D A, Louw N P
University of Western Cape, School of Dentistry, Cape Town, South Africa.
J Prosthet Dent. 1990 Feb;63(2):144-50. doi: 10.1016/0022-3913(90)90097-v.
Vented parallel-sided, serrated posts cemented into matching precision channels provide excellent retentive strength; however, they do not offer significant resistance to rotational forces. This article explores the effectiveness of using supplementary pins to compensate for this deficiency. A standardized method was used to place combinations of parallel-sided posts and screw-type pins in prepared root canals of extracted human teeth. Standardized composite resin cores were made for the posts. Results indicate that the dentist must take note of the amount of dentin available for pin placement and, with reference to the provided graphs, determine the ideal size and number of pin(s) to be inserted.
插入匹配精密通道并粘固的带通风孔平行侧面锯齿状桩提供了出色的固位强度；然而，它们对旋转力的抵抗力不强。本文探讨使用辅助桩来弥补这一缺陷的有效性。采用标准化方法将平行侧面桩和螺旋式桩组合放置在拔除的人牙预备根管中。为桩制作标准化复合树脂核。结果表明，牙医必须注意可用于放置桩的牙本质量，并参考所提供的图表，确定要插入的桩的理想尺寸和数量。
