Total hip replacement: a study of customized prostheses.
The majority of widely used hip prostheses offer a limited range of offset sizes, including 35, 37, 40, 44 and 45mm. These sizes are provided to match the mean population offset which has been reported as 43.0mm (Noble et al 1988). The variability of proximal femoral geometry in terms of offset is consistent with the theory that the geometry of the femur is determined by a large number of genetic and environmental factors (Ericksen 1979). This paper suggests that the range in offset sizes offered by off-the-shelf hip protheses is not sufficient to match the extremes of anatomical offset variability of the Northern Ireland sample studied and that a custom stem that matches more accurately key femoral dimensions such as offset, may be more desirable.
O'Brien
S
S
James
P
P
Engela
D
D
Beverland
D
D
Kernohan
G
G
D015400:Clinical Nursing Research; D006622:Hip Prosthesis / Q000451:nursing*; D006801:Humans; D009660:Northern Ireland; D009730:Nursing Assessment; D011474:Prosthesis Design