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KMID : 0350519930460020573
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Journal of Catholic Medical College
1993 Volume.46 No. 2 p.573 ~ p.582
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Effect of Regional Excision of Acetabular Limbus on Growing Hip Joint of Rabbits
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Abstract
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There are several obstacles which prevent the concentric reduction of the femoral head in the acetabulum. One of hem is inverted acetabular limbs. Inverted had been excised by Somerville and Scott(1957) during open reduction of the congenital hip
dislocation. There have been controversies in the acetabular development particularly with regard to limbus preservation and sacrifice.
The purpose of this study is to clarify the acetabular growth, changes of the hip joint and regeneration of limbus after regional excision of the acetabular limbus.
Twenty-eight growing rabbits, weighing average 530 g, were divided into 4 groups. The anterosuperior part of the right limbus was excised in group Ⅰ, anteroinferior part in groupⅡ, posterosuperior part in group Ⅲ and posteroinferior part in
groupⅣ.
The left hip joint was used for control in each group. The acetabular growth and changes of the hip joint were investigated by the serial X-ray in 4, 8, 12 weeks after excision of the limbus. The histological changes of hip joints were observed
at
the
12 weeks after excision of the limbus.
@ES The results were as follows :
@EN 1. In respect of acetabular angle and width, the growth of hip joints were significantly retarded in groupⅠ, Ⅲ, Ⅳ.There were no significant changes of the acetabular depth in all groups.
2. There were 3 subluxations in groupⅠ, only 1 subluxation in group Ⅱ, 3 subluxations and 2 dislocations in group Ⅲ, 5 subluxations and 2 dislocations in groupⅣ.
3. The regenerated acetabular limbus of well located cases in groupⅠ and group Ⅱ were relatively similar to the normal. The regenerated acetabular limbus of the subluxated and dislocated cases in group Ⅲ and Ⅳ were inverted and hypertrophied
in
fibrous tissue component.
These results suggest that the excision of the posterosuperir and posteroinferior part of limbus influenced acetabular growth and stability of the hip joint. Therefore, the excision of those part of the limbus should be preserved to maintain the
normal
cephalo-cotyloid development and to avoid subsequent luxation of the hip.
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