Oh I, Sander T W, Treharne R W
Clin Orthop Relat Res. 1985 May(195):304-9.
The design of pods and flanges on the acetabular cup surface was investigated to determine the effects on cement fixation of the total hip arthroplasty (THA) acetabular cup. To a basic cup designed with pods, four different types of flange designs were added: a cup without a flange, a cup having a flange with 12 scallops, a cup having a flange with three scallops, and a cup having a continuous flange. The cups were each inserted, via an MTS machine, into an instrumented simulated acetabulum containing polymerizing polymethylmethacrylate (PMMA). The PMMA intrusion pressure was measured by four pressure transducers, and the cement intrusion depth was measured via three rheometers. Also, three continuous-flange cups were manually inserted into cadaver acetabula in order to study the shape of the cement mantle around the cup. A cup with a continuous flange generated significantly higher cement intrusion pressures and depths when compared with the other three cups. A cup with pods and a continuous flange produced concentric positioning of the cup with a uniform cement thickness around the cup and was well contained within the reamed acetabulum.
研究了髋臼杯表面的凸纹和凸缘设计，以确定其对全髋关节置换术（THA）髋臼杯骨水泥固定的影响。对于一个设计有凸纹的基础杯，添加了四种不同类型的凸缘设计：无凸缘的杯、有12个扇形的凸缘的杯、有三个扇形的凸缘的杯和有连续凸缘的杯。通过MTS机器将每个杯子插入装有正在聚合的聚甲基丙烯酸甲酯（PMMA）的仪器化模拟髋臼中。通过四个压力传感器测量PMMA侵入压力，并通过三个流变仪测量骨水泥侵入深度。此外，将三个有连续凸缘的杯手动插入尸体髋臼中，以研究杯周围骨水泥套的形状。与其他三个杯子相比，有连续凸缘的杯产生的骨水泥侵入压力和深度明显更高。有凸纹和连续凸缘的杯使杯同心定位，杯周围骨水泥厚度均匀，并且很好地容纳在扩锉后的髋臼内。
