Total Hip Arthroplasty Using the S-ROM-A Prosthesis for Anatomically Difficult Asian Patients

Table 5

Radiological results according to femoral canal shape and implant positioning.

		Spot welding	Stress shielding (>III)	Bone ingrowth	Bone reaction around the distal part of the stem
Dorr classification
Stove pipe	23	20	5	23	8
Normal	51	46	2	48	11
Champagne-flute	5	0	0	5	0
Postfemoral osteotomy	15	15	0	15	0
Filling rate of the distal part of the canal by the stem
<80	10	7	1	8	4
80–90	40	38	4	40	6
90–100	44	39	2	43	7
Alignment of stem
Neutral	88	79	6	85	15
Varus	6	6	1	6	4
Valgus	0	0	0	0	0