Risk factor analysis for early femoral failure in metal-on-metal hip resurfacing arthroplasty: the effect of bone density and body mass index

Table 1 Detailed information of early femoral component failures.

Time after surgery (Months)	Reason of Failure	Femoral Fixation	T Score	Femoral Size (mm)	Primary Diagnosis	Sex	Body mass index (kg/m²)	Age (yrs)
1	Femoral Neck Fracture	Fully porous coated	-1.9	52	OA	Male	35	59
1.4	Femoral Neck Fracture	Fully porous coated	-0.3	44	OA	Female	24	61
3.1	Femoral Neck Fracture	Cemented	-1.6	46	OA	Female	29	43
10	Femoral Loosening	Fully porous coated	-0.5	54	Dysplasia	Male	34	50
17.8*	Femoral Loosening	Cemented	-2.1	52	AVN	Male	31	31

* The primary indication of hip resurfacing was avascular necrosis for this young gentleman. The symptom of severe pain due to avascular necrosis into femoral component was found 17.8 months post-operatively with visual analog scale pain score of 9/10. The patient waited to revise to total hip arthroplasty 27.6 months after surgery.

ISSN: 1749-799X