Technical note for intraoperative determination of proper acetabular cup size in primary total hip arthroplasty

Table 1 Mean values of acetabular templating, acetabular size indicator reamer and implanted cup size

Mean value templating	Mean value ‘fine reamer’	Mean value cup implanted
50 (48-56) mm	52 (50-54) mm	52 (48-56) mm

Table 2 Percentage accuracy of preoperative and intraoperative measurements in comparison with final acetabular component’s size

	Pre-operative templated cup size, %	Intra-operative reamer measurement, %
Percentage of accurately prediction	73.8	92.8
Percentage of discrepancy > 1 size	21.1	7.1
Percentage of discrepancy > 2 size	5.1	0.1