Burgess J O, Summitt J B
Department of Restorative Dentistry, University of Texas Health Science Center at San Antonio 78284-7890.
Oper Dent. 1991 Mar-Apr;16(2):55-60.
Extracted molar teeth, reduced to a flat surface approximately 3 mm coronal to the cementoenamel junction, were notched and embedded in acrylic. Nine types of pins were tested for retention in dentin and for resistance provided to complex amalgam restorations. Pins of each type were inserted into dentin and removed in tension with a constant load applied by an Instron Testing Machine (six pins per tooth). Minim and PPS pins provided significantly better retention in dentin than the other pins. Pins of each type were inserted into flattened teeth. Amalgam was condensed around the pins, allowed to set, and loaded in compression at 45 degrees. Pure titanium pins and heat-softened stainless steel pins provided significantly less resistance than titanium alloy or stainless steel pins.
将拔除的磨牙牙冠在牙骨质牙釉质界冠方约3毫米处磨平，刻痕后嵌入丙烯酸树脂中。测试了九种类型的桩钉在牙本质中的固位力以及对复合银汞合金修复体的抗力。将每种类型的桩钉插入牙本质中，并用英斯特朗试验机施加恒定载荷进行拉伸拔出（每颗牙六根桩钉）。微型桩和PPS桩在牙本质中的固位力明显优于其他桩钉。将每种类型的桩钉插入磨平的牙齿中。在桩钉周围填入银汞合金，待其凝固后，以45度角进行压缩加载。纯钛桩和热软化不锈钢桩提供的抗力明显低于钛合金桩或不锈钢桩。
