Timothy Alan Bird,Andrew Clive Taylor,Simon Nicholas Collins,Michael Anthony Tuke
申请号：
GB201609942
公开号：
GB2551155A
申请日:
2016.06.07
申请国别(地区):
GB
年份:
2017
代理人:
摘要：
An acetabular cup comprising inner 14 and outer 12 surfaces, defining a rim 16 including a non-sacrificial protruding formation 34, presenting a female engagement formation 18, which is preferably radially inwardly facing. The formation 18 may engage with a liner, preferably a polymeric or EPW (extended posterior wall) liner, or an impaction cap or introducer tool, which may be part of a kit. Surface 14 may transition to rim 16 by a rounded, angled or bevelled shoulder region 44, preferably at an angle of 25°- 60° (for example 50°). The formation 34 may be an extension of surface 12, extending around the circumference of the cup, and have a first surface 40, defining the engagement formation 18, and as second surface 42 terminating in a rounded, bevelled or angled region 46, preferably with an angle of 25°- 60° (for example 50°). The width of the female engagement opening 36 may be 0.2mm-2mm, preferably 0.8mm. The thickness of portion 34 may be 0.2mm-2mm, preferably 0.9mm. There may be a bulge 38, in the order of 0.5mm. There may be formations to prevent liner rotation. The cup may be non-metallic, preferably ceramic, and have a mono-block, homogenous structure.
