Ehrl P A, Reuther J, Frenkel G
Int J Oral Surg. 1981;10(Suppl 1):93-8.
A screw implant and a blade-vent implant were developed for the alloplastic substitution of teeth. Forty implants were observed for 18 months in five beagles; these implants were under maximal functional mastication. No implant was lost. The screw implant showed a tight attachment of bone over the whole implant surface. With the blade-vent implant we observed a partial interposition of connective tissue. This difference seems to depend on the different insertion techniques. Photoelastic studies showed a good stress distribution through enlarged and rounded off attachment surfaces. The described insertion techniques allowed a primary tight attachment of the implant surface and bone support, which led to an immediate stability of position. In the screw implant the physiologic mobility of teeth was imitated by means of a resilient element. Data from 30 cases were gained in a clinical 3-year follow-up. One case failed. For conclusive judgement, a longer period of time and more clinical cases are necessary, but existing data are encouraging.
为进行牙齿的异体替代，研发了一种螺旋种植体和一种叶状孔种植体。在五只比格犬身上对40颗种植体进行了18个月的观察；这些种植体处于最大功能咀嚼状态。没有种植体丢失。螺旋种植体在整个种植体表面显示出骨紧密附着。对于叶状孔种植体，我们观察到结缔组织部分介入。这种差异似乎取决于不同的植入技术。光弹性研究表明，通过扩大和倒圆附着表面可实现良好的应力分布。所描述的植入技术可使种植体表面与骨支持实现初步紧密附着，从而实现位置的即时稳定。在螺旋种植体中，借助弹性元件模拟了牙齿的生理移动性。在一项为期3年的临床随访中获得了30例病例的数据。有1例失败。为得出结论性判断，需要更长的时间和更多的临床病例，但现有数据令人鼓舞。
