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Ankle Joint

Ankle Joint

The ankle is formed by the talocrural joint (crural = leg). It consists of the articulations between the talus bone of the foot and the distal ends of the tibia and fibula of the leg. The superior aspect of the talus bone is square-shaped and has three areas of articulation. The top of the talus articulates with the inferior tibia. This is the portion of the ankle joint that carries the body weight between the leg and foot. The sides of the talus are firmly held in position by the articulations...

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Acetabular coverage after innominate osteotomy.

James R Barnes¹, Simon R Thomas, John Wedge

¹Bristol Royal Hospital for Children, Redland, Bristol, UK. jamesralphbarnes@yahoo.co.uk

Journal of Pediatric Orthopedics

|June 10, 2011

Summary

This summary is machine-generated.

Innominate osteotomy in children younger than 5 did not consistently lead to adult acetabular retroversion. Reduced hip contact area, not retroversion, may predispose to osteoarthritis after this procedure.

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Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach

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Area of Science:

Orthopedic surgery
Hip dysplasia
Osteoarthritis

Background:

Acetabular retroversion is a potential complication of innominate osteotomy.
This may predispose patients to osteoarthritis.
Long-term effects of innominate osteotomy on acetabular version are not well understood.

Purpose of the Study:

To investigate whether innominate osteotomy causes relative acetabular retroversion.
To assess the long-term radiographic outcomes of innominate osteotomy for developmental hip dislocation.

Main Methods:

Retrospective analysis of standing hip radiographs from 36 hips in 30 patients who underwent open reduction and innominate osteotomy at least 40 years prior.
Acetabular coverage, contact area, and version were measured using the Hefti (1995) method.
Comparison groups included contralateral hips and age/sex-matched normal hips.

Main Results:

No significant difference in anterior coverage, posterior coverage, or anteversion was found between operated hips and controls.
A significant difference in contact area (P < 0.001) was observed.
Osteoarthritis obscured landmarks in 10 hips; 26 were readable.

Conclusions:

Innominate osteotomy performed before age 5 did not consistently result in persistent acetabular retroversion into adulthood.
Decreased hip contact area, rather than acetabular retroversion, may be linked to early osteoarthritic changes.
Contralateral hips showed reduced contact area, suggesting occult dysplasia.