Résumé
Introduction: Morphometric study of spinoglenoid notch, coracoacromial arch, and another measurement of the scapulae are required to understand the reason for spasms of common muscle due to supraspinatus tendinitis, nerve compression over the spinoglenoid notch. Therefore, the aim of this study was to discuss the subcoracoacromial arch, deviation of the spinous process, and measurement of the spinoglenoid notch. Materials and Methods: This study was conducted at the Department of Anatomy, Sri Venkateshwaraa Medical College Hospital & Research Centre, Chennai, Tamil Nadu, India on 70 scapulae that include 58 non-articulated scapulae and 12 articulated scapulae. All the measurements were performed with a vernier caliper and the alignment of the spinous process of the scapula was measured with a goniometer. All the measurements are compared on both sides. Results: All the measurements were performed and presented as mean with standard deviation. We found the variation of diameter between the left and right sides. Spinoglenoid notch diameters were noted as anterior to posterior right 2.97 ± 0.37 cm, left 3.06 ± 0.56 cm and medial to lateral right 1.36 ± 0.14 cm, left 1.4 ± 0.08 cm. Subcoracoacromial arch was observed as right 1.85 ± 0.23 cm and left 1.92 ± 0.4 cm. The direction of the spinous process of the scapula was noted as right 21.50º ± 8.50 and left 18.8º ± 7.89. Conclusion: The present morphometric study findings may give a different approach to supraspinatous tendinits, shoulder instability, and dislocation cases due to morphometric changes present in the spinous process, acromion process, glenoid cavity, and spinoglenoid notch of the scapula. These morphometric studies on scapula can help radiologists, orthopedicians, and physiotherapists to plan patient management.
Résumé
Purpose: There is a paucity of data which reflected the relationship between morphology and incidence of shoulder disorders with respect to the ethnic Chinese population. We used anteroposterior radiographs to measure the Acromion Index (AI) and Acromioglenoid Angle (AA) of Chinese patients. The baseline was defined as the line that connected the superior and inferior osseous margins of the glenoid cavity. In order to calculate the AI, the distance from the baseline to the lateral margin of the acromion was measured and then divided by the distance from the baseline to the lateral aspect of the humeral head. The AA was defined as the angle formed by the intersecting line drawn tangent to the sclerotic line of the acromion undersurface and the baseline point. The AI and AA were determined in three groups: 165 patients (average age, 60.2 years) with chronic shoulder symptoms; in an age and gender-matched acute injury group of 61 patients (average age, 44.3 years); and in an age and gender-matched control group of 63 volunteers (average age, 37.3 years).The average AI and standard deviation was 0.72 +/- 0.06 in shoulders with subacromial impingement syndrome, 0.59 +/- 0.06 in those with acute injury, and 0.66 ± 0.06 in normal shoulders. The average AA and standard deviation was 76.8°+/-7.02 in shoulders with subacromial impingement syndrome, 84.2°+/-7.81 in those with acute injury, and 80.0°+/- 7.33 in normal shoulders. The AI and AA varied between patients with acute and chronic shoulder problems.
Hay escasez de datos que reflejen la relación entre la morfología y la incidencia de los trastornos de hombro con respecto a la población de origen chino. Se utilizó radiografías anteroposteriores para medir el índice acromial (IA) y ángulo acromioglenoido (AA) de los pacientes chinos. La línea de base se define como la que conecta los márgenes óseos superior e inferior de la cavidad glenoidea. Con el fin de calcular el IA, se midió la distancia desde la línea base hasta el margen lateral del acromion y luego se dividió por la distancia desde la línea base hasta la cara lateral de la cabeza humeral. El AA se define como el ángulo formado por la línea de intersección dibujada tangente a la línea esclerótica de la superficie inferior del acromion y el punto de línea base. El AI y AA se determinaron en tres grupos: 165 pacientes (edad media, 60,2 años) con síntomas crónicos en el hombro; en un grupo de 61 pacientes (edad media, 44,3 años) con herida aguda, y en un grupo control de 63 voluntarios (edad media, 37,3 años). La IA promedio fue de 0,72 +/- 0,06 en los hombros con el síndrome de pinzamiento subacromial, 0,59 +/- 0,06 en los pacientes con lesión aguda, y 0,66 +/- 0,06 en los hombros normales. El AA promedio fue de 76,8 ° +/- 7,02 en los hombros con el síndrome de pinzamiento subacromial, 84,2 ° +/- 7,81 en los pacientes con lesión aguda, y 80,0 ° +/- 7,33 en los hombros normales. La IA y AA variaron entre los pacientes con problemas en el hombro agudos y crónicos.