The anterior tilt of the acromion: radiographic evaluation and correlation with shoulder diseases
| Autor: | Lorenzo E. Derchi, A. Franconeri, G. B. Ravera, N. Prato, G. Tegaldo, D. Peloso, Enzo Silvestri |
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| Jazyk: | angličtina |
| Rok vydání: | 1998 |
| Předmět: |
Adult
Joint Instability Male medicine.medical_specialty Shoulders Radiography Sensitivity and Specificity Rotator Cuff Injuries Rotator Cuff medicine Fluoroscopy Humans Radiology Nuclear Medicine and imaging Acromion Ultrasonography Observer Variation Rupture medicine.diagnostic_test business.industry Shoulder Joint Rotator cuff injury Ultrasound Calcific tendinitis Calcinosis Reproducibility of Results General Medicine Humerus Middle Aged medicine.disease medicine.anatomical_structure Tilt (optics) Shoulder Impingement Syndrome Chronic Disease Tendinopathy Female Radiology Joint Diseases Shoulder Injuries business |
| Popis: | The aim of this study was to test whether the anterior tilt of the acromion can be objectively evaluated on lateral radiographs, and whether there is a relation between this anatomical feature and the most common shoulder diseases. Lateral radiographs of 15 dried scapulas were performed in neutral position and with 5 degrees of caudal, cranial, anterior and posterior angulations. Two hundred and forty-three shoulders, both asymptomatic and affected by chronic and post-traumatic impingement, calcific tendinitis and instability, were examined by conventional radiography. The presence of rotator-cuff tears was investigated by sonography. A method was elaborated to obtain reproducible lateral radiographs and to determine the acromial tilt angle. Inter- and intraobserver and inter- and intraoperator variations in measurements were evaluated. Variations in tube angulation produced changes in tilt-angle values on dried scapulas. The average tilt angle for the chronic impingement and the instability groups were significantly different from the post-traumatic, calcific tendinitis and control groups. Rotator-cuff tears were significantly more frequent in the chronic impingement group and related to a more acute tilt angle. The inter- and intraobserver variability coefficients were 0.95 and 0.98, whereas the inter- and intraoperator variability coefficients were 0.94 and 0.96, respectively. Conventional radiography using fluoroscopy for positioning is a well-reproducible method for the evaluation of acromial tilt. There is a significant difference in tilt-angle values between some groups of subjects examined, but the lack of specificity limits the clinical importance of such measurement. |
| Databáze: | OpenAIRE |
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