Anatomical and radiological correlation of Lequesne's "false profile".

Area of Science:

• Orthopedics
• Radiology
• Anatomy

Background:

• The Lequesne projection is an oblique radiographic view.
• It is used to assess anterior acetabular arthrosis and femoral head coverage.
• Its anatomical accuracy has not been fully established.

Purpose of the Study:

• To determine the anatomical correlation of Lequesne's radiological projection.
• To validate the accuracy of Lequesne's technique for measuring anterior femoral head coverage.

Main Methods:

• Fifteen in vitro hemipelvises were utilized for the study.
• Radiography was performed following Lequesne's projection method.
• Metallic markers and wires were used to identify and measure physical landmarks.

Main Results:

• Geometric analysis revealed a lack of anatomical correlation for the points used in Lequesne's technique.
• The Lequesne projection can diagnose acetabular dysplasia.
• Measurements obtained via Lequesne's method were, on average, 5.5 degrees less than anatomical measurements.

Conclusions:

• Lequesne's projection demonstrates diagnostic utility for acetabular dysplasia.
• The technique exhibits anatomical inaccuracies, leading to potential underestimation of anterior femoral head coverage.