NDLI: Clinical importance of impingement deformities for hip osteoarthritis progression in a Japanese population.

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Clinical importance of impingement deformities for hip osteoarthritis progression in a Japanese population.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Hashimoto, Shingo Fujishiro, Takaaki Hayashi, Shinya Kanzaki, Noriyuki Nishiyama, Takayuki Kurosaka, Masahiro
Spatial Coverage	Japan
Description	Author Affiliation: Hashimoto S ( Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1, Kusunoki-cho, Chuo-ku, Kobe, Hyogo, 650-0017, Japan, shingo1023@theia.ocn.ne.jp.)
Abstract	PURPOSE: Femoroacetabular impingement is a new disease concept for hip disorders in young adults suggested as a major cause of primary hip osteoarthritis in Western countries. However, significant controversy exists regarding the prevalence and contribution of impingement deformities to osteoarthritis in Japan, owing to the higher prevalence of developmental dysplasia of the hip. Therefore, the aims of this study were to: (1) determine the prevalence of structural abnormalities associated with hip disorders in patients undergoing total hip replacement and (2) analyse the contribution of impingement deformities to osteoarthritis. METHODS: We analysed 250 patients from two different medical centres who underwent primary total hip replacement except those which were due to femoral head necrosis, posttraumatic osteoarthritis and systemic inflammatory disease. The average patient age at surgery was 64 years (range, 40-89 years), with 35 men and 215 women. RESULTS: Radiographic abnormality related to developmental dysplasia of the hip was associated with the majority of osteoarthritic hips (62%). Hips with femoroacetabular impingement deformities were present within the cases categorized as unknown etiology. Cam impingement deformity was present in 22% of unknown aetiology cases when cases with reactive osteophytes were excluded from all cam deformity cases (pistol grip deformity and aspherical femoral heads). CONCLUSIONS: The prevalence of femoroacetabular impingement within primary osteoarthritis cases and gender predominance of impingement deformities are relatively similar to those reported previously in Western populations. This finding indicates that femoroacetabular impingement deformities are associated with osteoarthritis in the Japanese population, although it has a lower frequency among all hip failure patients.
File Format	HTM / HTML
ISSN	03412695
e-ISSN	14325195
DOI	10.1007/s00264-014-2393-z
Journal	International Orthopaedics
Issue Number	8
Volume Number	38
Language	English
Publisher	Springer
Publisher Date	2014-08-01
Publisher Place	Germany
Access Restriction	Open
Subject Keyword	Discipline Orthopedics Disease Progression Femoracetabular Impingement Complications Epidemiology Hip Joint Abnormalities Osteoarthritis, Hip Etiology Arthroplasty, Replacement, Hip Femur Head Necrosis Hip Dislocation, Congenital Radiography Sex Factors Western World Comparative Study
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Surgery

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