The role of femoral neck anteversion in the development of osteoarthritis in dysplastic hips

Abstract

There have been several studies examining the association between the morphological characteristics seen in acetabular dysplasia and the incidence of the osteoarthritis (OA). However, most studies focus mainly on acetabular morphological analysis, and few studies have scrutinised the effect of femoral morphology. In this study we enrolled 36 patients with bilateral acetabular dysplasia and early or mid-stage OA in one hip and no OA in the contralateral hip. CT scans were performed from the iliac crest to 2 cm inferior to the tibial tuberosity, and the morphological characteristics of both acetabulum and femur were studied. In addition, 200 hips in 100 healthy volunteer Chinese adults formed a control group. The results showed that the dysplastic group with OA had a significantly larger femoral neck anteversion and a significantly shorter abductor lever arm than both the dysplastic group without OA and the controls. Femoral neck anteversion had a significant negative correlation with the length of the abductor lever arm and we conclude that it may contribute to the development of OA in dysplastic hips.

Relationship between pelvic incidence and osteoarthritis of the hip

“… 37 - 41 Since Gunnar Wiberg postulated his 1939 thesis, “Studies on Dysplastic Acetabula and Congenital Subluxation of the Hip Joint with Special Reference to the Complication of Osteoarthritis,” there has been an very little to contradict the hypothesis that patients with acetabular dysplasia often have labral tearing and cartilage degeneration at an early age, resulting in premature HOA. 42 - 45 …”

Femoral Version, Neck-Shaft Angle, and Acetabular Anteversion in Chinese Han Population

“…Femoral version and acetabular anteversion should be given full consideration during total hip arthroplasty (THA) to reduce the risk of postoperative dislocation. 1 , 2 Additionally, it is reported that abnormal acetabular anteversion and/or femoral version participate in the etiogenesis of hip osteoarthritis, 3 , 4 developmental dysplasia of the hip (DDH), 5 , 6 and gluteal tendinopathy. 7 Femoral neck-shaft angle, defined as an intersection angle by proximal femoral shaft axis and femoral neck axis, is another clinically significant parameter of proximal femoral geometry (PFG).…”

Osteoarthritis year in review 2015: imaging

“…In an MRI study of community-based adults, increased acetabular depth (a measure of pincer-type FAI) was associated with reduced femoral head cartilage volume and an increased risk of cartilage defects and BMLs 50 . Larger femoral neck anteversion and shorter abductor lever arm assessed from CT were associated with the development of OA in dysplastic hips 51 . Bone shape appears modifiable.…”