Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_

Poster
Topic: General Orthopaedics
Abstract number: 25207
A MULTI-INSTITUTIONAL STUDY REGARDING OSTEOARTHRITIS OF THE HIP
IN JAPAN -THE INVOLVEMENT OF ACETABULAR DYSPLASIA-
Seiya JINGUSHI 1 , Muroto SOFUE 2 , Yoshio HIROTA 3 , Moritoshi ITOMAN 4 , Tadami
MATSUMOTO 5 , Hiroyuki SHINDO 6 , Yoshiki HAMADA 7 , Yoshio TAKATORI 8 , Haruki
YAMADA 9 , Yuji YASUNAGA 10 , Hiroshi ITO 11 , Satoshi MORI 12 , Ichiro OWAN 13 , Genji
FUJII 14
1 Kyushu Rosai Hospital of Japan Labour Health and Welfare Organization,
Kitakyushu (JAPAN), 2 Nakajo Central Hospital, Kitakambara Gun (JAPAN), 3 Osaka
City University Graduate School of Medicine, Osaka (JAPAN), 4 School of Medicine,
Kitasato University, Sagamihara (JAPAN), 5 Kanazawa Medical University, Kawakitagun
(JAPAN), 6 Graduate School of Medicine, Nagasaki University, Nagasaki
(JAPAN), 7 Mitsuwadai General Hospital, Chiba (JAPAN), 8 Graduate School of
Medicine, The University of Tokyo, Tokyo (JAPAN), 9 Fujita Health University,
Toyoake (JAPAN), 10 Graduate School of Biomedical Sciences, Hiroshima University,
Hiroshima (JAPAN), 11 Asahikawa Medical College, Asahikawa (JAPAN), 12 Seirei
Hamamatsu General Hospital, Hamamatsu (JAPAN), 13 School of Medicine,
University of the Ryukyus, Chuto-gun (JAPAN), 14 Tohoku Hip Joint Center, Matuda
Hospital, Sendai (JAPAN)
Objective - Coxarthrosis is a major disease that affects the healthy life span of a
population. It is necessary to fully understand the patents condition before systematic
treatment can be applied. This study investigated the current status of coxarthrosis
with a particular focus on the involvement of acetabular dysplasia. Methods - Data
were collected from adult coxarthrosis patients in the orthopaedic outpatient office of
15 institution five different areas of Japan for 9 months. Data were also collected
from patients with hip osteonecrosis as controls. The collected data from each patient
included the sex, age, treatment history for DDH, and clinical score of the hip joints.
Etiology was determined from the 17 disease options. The roentgenographic stages
of coxarthrosis, as well the indexes of acetabular dysplasia were assessed in each
coxarthrosis joint. Results - There was a substantially larger number of female
patients than male patients. This difference regarding gender was found in every
generation. The peak age at presentation was for patients in their 50’s. The etiology
was assessed to be acetabular dysplasia in most of the patients. The measurements
of the indexes of acetabular dysplasia also showed the similar rate. The Sharp angle
and the acetabular oblique angle of the coxarthrosis joints were significantly larger
than those of the non-coxarthrosis joints or those of the osteonecrosis hip joints. The
AHI was significantly smaller. Conclusions - The patients with hip osteoarthritis in
Japan were unique in regard to age distribution, gender heterogeneity and disease
etiology. Acetabular dysplasia is still main etiology.
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