Impact of triple pelvic osteotomy on contact stress pressure distribution in the hip joint

Purpose We studied changes of contact stress distribution in the hip joint after Tonnis triple pelvic osteotomy applied in the treatment of dysplasia and hip joint incongruence in adolescents. Methods In a group of 75 patients, 54 (72 %) female, who underwent surgery by triple pelvic osteotomy in ad...

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Bibliographic Details
Published in:International orthopaedics 2013-01, Vol.37 (1), p.95-98
Main Authors: Vukasinovic, Zoran, Spasovski, Dusko, Kralj-Iglic, Veronika, Marinkovic-Eric, Jelena, Seslija, Igor, Zivkovic, Zorica, Spasovski, Vesna
Format: Article
Language:English
Subjects:
Adolescent
Analysis of Variance
Biomechanical Phenomena
Female
Femur Head Necrosis - diagnostic imaging
Femur Head Necrosis - physiopathology
Femur Head Necrosis - surgery
Hip Dislocation, Congenital - diagnostic imaging
Hip Dislocation, Congenital - physiopathology
Hip Dislocation, Congenital - surgery
Hip Joint - diagnostic imaging
Hip Joint - physiopathology
Hip Joint - surgery
Humans
Male
Medicine
Medicine & Public Health
Original Paper
Orthopedics
Osteotomy - methods
Pressure
Radiography
Statistics, Nonparametric
Stress, Mechanical
Treatment Outcome
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Summary:Purpose We studied changes of contact stress distribution in the hip joint after Tonnis triple pelvic osteotomy applied in the treatment of dysplasia and hip joint incongruence in adolescents. Methods In a group of 75 patients, 54 (72 %) female, who underwent surgery by triple pelvic osteotomy in adolescence for developmental disorder of the hip and avascular necrosis of the femoral head, a three-dimensional hip joint model was used based on the radiography of the pelvis with hips. The following biomechanical parameters were calculated: resultant hip force normalised to body weight (R/Wb), inclination of the resultant hip force (θ−R), the position of the stress pole (θ), peak contact hip stress (Pmax), and peak contact hip stress normalised to body weight (Pmax/Wb). Gait quality was also assessed. Results After surgery the Wiberg CE angle was increased by 17.85° (114 %), resultant hip force normalised to body weight (R/Wb) was decreased by 0.107 (3.3 %), the position of the stress pole was shifted medially by 27.59° (63.5 %), and peak contact hip stress normalised to body weight (Pmax/Wb) was decreased by 2249.74 (55.9 %). Waddling gait was reduced from 17 (23.9 %) to four cases (5.6 %). All changes were statistically highly significant ( p
ISSN:0341-2695
1432-5195
DOI:10.1007/s00264-012-1727-y