A novel thin-walled direct-to-bone fixation ceramic cup was tested under critical impact loads simulating lateral fall and car crash scenarios. Three sizes of BIOLOX delta ceramic cups (total hip replacement cup with bearing diameter of 32 mm and two hip resurfacing cups with bearing diameters of 40 and 64mm) were implanted into reamed Sawbones blocks representing acetabulae. Three cups of each size were fully supported by the block and three were implanted with 15° of the cup’s outer diameter unsupported by the block. All testing was conducted with the corresponding bearing diameter heads lateralised by approximately 1 mm to represent worst case subluxed hips and all then subjected to test, replicating a lateral fall impact followed by a car crash impact. All cups passed lateral fall conditions without visible damage, although some movement of the cups was measured and damage to the blocks was observed. Five out of six of each cup size survived the car crash impacts with one fracture per size. In all cases, this was in the fully supported condition representing the highest cup inclination angle. The car crash impact force was equivalent to that reported to fracture the acetabulum and in all simulated cases, the Sawbones block showed signs of damage. Survival of five cups per size suggests the pelvis is much more likely to fracture before the cup. The ability of the cups to withstand these critical impact forces indicates they are unlikely to fracture in normal clinical use and should meet the more challenging demands of active patients likely to receive this device.

在模拟横向坠落和车祸场景的临界冲击载荷下测试了一种新型薄壁直接骨固定陶瓷杯。将三种尺寸的 BIOLOX delta 陶瓷杯（轴承直径为 32 毫米的全髋关节置换杯和轴承直径为 40 和 64 毫米的两个髋关节表面置换杯）植入代表髋臼的铰孔锯骨块中。每个尺寸的三个杯子完全由块支撑，三个被植入，杯子外径的 15° 没有被块支撑。所有测试都是在相应的轴承直径头部侧向大约 1 毫米的情况下进行的，以代表最坏情况下半脱位的臀部，然后所有这些都进行了测试，复制了横向坠落冲击，然后是汽车碰撞冲击。所有杯子都通过了横向坠落条件，没有明显损坏，尽管测量了杯子的一些移动并观察到了块的损坏。每个杯子尺寸的六分之五在车祸冲击中幸存下来，每个尺寸都有一个骨折。在所有情况下，这是在代表最高杯倾角的完全支撑条件下。车祸冲击力相当于报告的髋臼骨折，在所有模拟情况下，锯骨块都显示出损坏迹象。每个尺寸的五个杯子的存活表明骨盆更容易在杯子之前骨折。杯子承受这些临界冲击力的能力表明它们在正常临床使用中不太可能破裂，并且应该满足可能接受该设备的活跃患者的更具挑战性的需求。每个杯子尺寸的六分之五在车祸冲击中幸存下来，每个尺寸都有一个骨折。在所有情况下，这是在代表最高杯倾角的完全支撑条件下。车祸冲击力相当于报告的髋臼骨折，在所有模拟情况下，锯骨块都显示出损坏迹象。每个尺寸的五个杯子的存活表明骨盆更容易在杯子之前骨折。杯子承受这些临界冲击力的能力表明它们在正常临床使用中不太可能破裂，并且应该满足可能接受该设备的活跃患者的更具挑战性的需求。每个杯子尺寸的六分之五在车祸冲击中幸存下来，每个尺寸都有一个骨折。在所有情况下，这是在代表最高杯倾角的完全支撑条件下。车祸冲击力相当于报告的髋臼骨折，在所有模拟情况下，锯骨块都显示出损坏迹象。每个尺寸的五个杯子的存活表明骨盆更容易在杯子之前骨折。杯子承受这些临界冲击力的能力表明它们在正常临床使用中不太可能破裂，并且应该满足可能接受该设备的活跃患者的更具挑战性的需求。车祸冲击力相当于报告的髋臼骨折，在所有模拟情况下，锯骨块都显示出损坏迹象。每个尺寸的五个杯子的存活表明骨盆更容易在杯子之前骨折。杯子承受这些临界冲击力的能力表明它们在正常临床使用中不太可能破裂，并且应该满足可能接受该设备的活跃患者的更具挑战性的需求。车祸冲击力相当于报告的髋臼骨折，在所有模拟情况下，锯骨块都显示出损坏迹象。每个尺寸的五个杯子的存活表明骨盆更容易在杯子之前骨折。杯子承受这些临界冲击力的能力表明它们在正常临床使用中不太可能破裂，并且应该满足可能接受该设备的活跃患者的更具挑战性的需求。