Abstract:
Background: Ankylosing spondylitis (AS) is a chronic inflammatory disease of unknown etiology which primarily affects the sacroiliac joints, spine, hips and, less commonly, the knee joints, resulting in severe deformities and in combination with a stiff spine, leads to further deterioration in function. Cementless total hip replacement (THR) provides long-term pain relief in a large percentage of (AS) patients. The range of hip movement is significantly increased leading to a marked improvement in their overall walking ability. The percentage of clinically significant Heterotopic Ossification (HO) and re-ankylosis rates is low.
Aim of the study: To evaluate the short-term results of cementless total hip replacement (THR) in patients with (AS).
Subjects and methods: A retrospective analysis of 12 Ankylosing Spondylitis patients with hips involvement in 15 hips. The right hip was affected in 4 cases, the left in 5 cases and bilateral in 3 cases treated by cementless. The patients were assed clinically by Harris hip score preoperatively & postoperatively. Anteroposterior (AP) both hips X-ray was taken pre-operatively, immediate post-operative period and at follow-up.
Results: This results showed highly significant improvement in total hip score points from average 25.47 ± 4.67 points (17-32) preoperatively to average 84.47±5.84 points (71- 93) postoperatively.
Conclusion: The results of cementless THR in patients with bony ankylosis are encouraging with risk of intraoperative complications needing great care and good perioperative management. Patients were satisfied with the functional outcome. So, the stable ingrowth postoperatively in our research recommends cementless implants in AS patients.