Abstract
Background
Normal changes in acetabular version over the course of skeletal development have not been well characterized. Knowledge of normal version development is important because acetabular retroversion has been implicated in several pathologic hip processes.
Questions/purposes
The purpose of this study was to characterize the orientation of the acetabulum by measuring (1) acetabular version and (2) acetabular sector angles in pediatric patients during development. We also sought to determine whether these parameters vary by sex in the developing child.
Methods
We evaluated CT images of 200 hips in 100 asymptomatic pediatric patients (45 boys, 55 girls; mean age, 13.5 years; range, 9–18 years) stratified by the status of the triradiate physis and sex. We determined the acetabular anteversion angle at various levels in the axial plane as well as acetabular sector angles at five radial planes around the acetabulum.
Results
For both genders, anteversion angle was greater for the closed physis group throughout all levels (p < 0.001) and both open and closed physis groups were more anteverted as the cut moved caudally away from the acetabular roof (p < 0.001). At the center of the femoral head, the mean anteversion angle (± SD) in girls was 15° ± 3° in the open group and 19° ± 5° in the closed group (p < 0.001). In boys, the mean anteversion angle increased from 14° ± 4° in the open group to 19° ± 4° in the closed group (p = 0.003). In the superior, posterosuperior, and posterior planes, the acetabular sector angles were greater in the closed compared with the open physis group for both boys and girls with the largest increase occurring in the male posterosuperior plane (approximately 20°) (all p < 0.05).
Conclusions
This study demonstrates that acetabular anteversion and acetabular sector angles in both male and female subjects increase with skeletal maturity as a result of growth of the posterior wall. This suggests that radiographic appearance of acetabular retroversion may not be attributable to overgrowth of the anterior wall but rather insufficient growth of the posterior wall, which has clinical treatment implications for pincer-type impingement.
Level of Evidence
Level IV diagnostic study.
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References
Anda S, Svenningsen S, Dale LG, Benum P. The acetabular sector angle of the adult hip determined by computed tomography. Acta Radiol. 1986;27:443–447.
Anda S, Terjesen T, Kvistad KA. Computed tomography measurements of the acetabulum in adult dysplastic hips: which level is appropriate? Skeletal Radiol. 1991;20:267–271.
Dandachli W, Islam SU, Liu M, Richards R, Hall-Craggs M, Witt J. Three-dimensional CT analysis to determine acetabular retroversion and the implications for the management of femoro-acetabular impingement. J Bone Joint Surg Br. 2009;91:1031–1036.
Dwek JR, Monazzam S, Chung CB. Radiologic analysis of femoral acetabular impingement: from radiography to MRI. Pediatr Radiol. 2013;43(Suppl 1):S61–70.
Fabricant PD, Hirsch BP, Holmes I, Kelly BT, Lorich DG, Helfet DL, Bogner EA, Green DW. A radiographic study of the ossification of the posterior wall of the acetabulum: implications for the diagnosis of pediatric and adolescent hip disorders. J Bone Joint Surg Am. 2013;95:230–236.
Fujii M, Nakashima Y, Yamamoto T, Mawatari T, Motomura G, Matsushita A, Matsuda S, Jingushi S, Iwamoto Y. Acetabular retroversion in developmental dysplasia of the hip. J Bone Joint Surg Am. 2010;92:895–903.
Ganz R, Parvizi J, Beck M, Leunig M, Notzli H, Siebenrock KA. Femoroacetabular impingement: a cause for osteoarthritis of the hip. Clin Orthop Relat Res. 2003;417:112–120.
Giori NJ, Trousdale RT. Acetabular retroversion is associated with osteoarthritis of the hip. Clin Orthop Relat Res. 2003;417:263–269.
Ito K, Minka MA 2nd, Leunig M, Werlen S, Ganz R. Femoroacetabular impingement and the cam-effect. A MRI-based quantitative anatomical study of the femoral head-neck offset. J Bone Joint Surg Br. 2001;83:171–176.
Jamali AA, Mladenov K, Meyer DC, Martinez A, Beck M, Ganz R, Leunig M. Anteroposterior pelvic radiographs to assess acetabular retroversion: high validity of the ‘cross-over-sign.’ J Orthop Res. 2007;25:758–765.
Kang AC, Gooding AJ, Coates MH, Goh TD, Armour P, Rietveld J. Computed tomography assessment of hip joints in asymptomatic individuals in relation to femoroacetabular impingement. Am J Sports Med. 2010;38:1160–1165.
Lang P, Genant HK, Jergesen HE, Murray WR. Imaging of the hip joint. Computed tomography versus magnetic resonance imaging. Clin Orthop Relat Res. 1992;274:135–153.
Liporace FA, Ong B, Mohaideen A, Ong A, Koval KJ. Development and injury of the triradiate cartilage with its effects on acetabular development: review of the literature. J Trauma. 2003;54:1245–1249.
Meena S, Kishanpuria T, Gangari SK, Sharma P. Traumatic posterior hip dislocation in a 16-month-old child: a case report and review of literature. Chinese J Traumatol. 2012;15:382–384.
Monazzam S, Bomar JD, Dwek JR, Hosalkar HS, Pennock AT. Development and prevalence of femoroacetabular impingement-associated morphology in a paediatric and adolescent population: a CT study of 225 patients. Bone Joint J. 2013;95:598–604.
Murtha PE, Hafez MA, Jaramaz B, DiGioia AM 3rd. Variations in acetabular anatomy with reference to total hip replacement. J Bone Joint Surg Br. 2008;90:308–313.
Notzli HP, Wyss TF, Stoecklin CH, Schmid MR, Treiber K, Hodler J. The contour of the femoral head-neck junction as a predictor for the risk of anterior impingement. J Bone Joint Surg Br. 2002;84:556–560.
Ponseti IV. Growth and development of the acetabulum in the normal child. Anatomical, histological, and roentgenographic studies. J Bone Joint Surg Am. 1978;60:575–585.
Reikeras O, Bjerkreim I, Kolbenstvedt A. Anteversion of the acetabulum in patients with idiopathic increased anteversion of the femoral neck. Acta Orthop Scand. 1982;53:847–852.
Reynolds D, Lucas J, Klaue K. Retroversion of the acetabulum. A cause of hip pain. J Bone Joint Surg Br. 1999;81:281–288.
Rubel IF, Kloen P, Potter HG, Helfet DL. MRI assessment of the posterior acetabular wall fracture in traumatic dislocation of the hip in children. Pediatr Radiol. 2002;32:435–439.
Stasikelis PJ, Sullivan CM, Phillips WA, Polard JA. Slipped capital femoral epiphysis. Prediction of contralateral involvement. J Bone Joint Surg Am. 1996;78:1149–1155.
Steppacher SD, Albers CE, Siebenrock KA, Tannast M, Ganz R. Femoroacetabular impingement predisposes to traumatic posterior hip dislocation. Clin Orthop Relat Res. 2013;471:1937–1943.
Strayer LM Jr. Embryology of the human hip joint. Clin Orthop Relat Res. 1971;74:221–240.
Tönnis D, Heinecke A. Acetabular and femoral anteversion: relationship with osteoarthritis of the hip. J Bone Joint Surg Am. 1999;81:1747–1770.
Visser JD, Jonkers A, Hillen B. Hip joint measurements with computerized tomography. J Pediatr Orthop. 1982;2:143–146.
Wassilew GI, Heller MO, Diederichs G, Janz V, Wenzl M, Perka C. Standardized AP radiographs do not provide reliable diagnostic measures for the assessment of acetabular retroversion. J Orthop Res. 2012;30:1369–1376.
Watts HG. Fractures of the pelvis in children. Orthop Clin North Am. 1976;7:615–624.
Weiner LS, Kelley MA, Ulin RI, Wallach D. Development of the acetabulum and hip: computed tomography analysis of the axial plane. J Pediatr Orthop. 1993;13:421–425.
Zaltz I, Kelly BT, Hetsroni I, Bedi A. The crossover sign overestimates acetabular retroversion. Clin Orthop Relat Res. 2013;471:2463–2470.
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This work was performed at the Children’s Hospital Boston, Boston, MA, USA.
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Hingsammer, A.M., Bixby, S., Zurakowski, D. et al. How Do Acetabular Version and Femoral Head Coverage Change With Skeletal Maturity?. Clin Orthop Relat Res 473, 1224–1233 (2015). https://doi.org/10.1007/s11999-014-4014-y
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DOI: https://doi.org/10.1007/s11999-014-4014-y