Anatomical Study of the Clavicle: Implications for Clinical Practice

Background/Objectives: The aim of this study is to describe clavicular morphometric parameters and key bony landmarks relevant to plate-and-screw fixation and ligamentous reconstruction procedures. Methods: Morphometric measurements were performed on 179 adult human clavicles: 84 right and 95 left. Linear measurements were obtained using a Mitutoyo digital caliper (0.01 mm precision). Angular measurements were conducted using ImageJ software (LOCI, University of Wisconsin, Madison, USA). Results: The mean distance between the sternal articular surface and the midpoint of the sternoclavicular curvature was 49.23 ± 8.86 mm. The mean distance between the midpoints of the sternoclavicular and acromioclavicular curvatures was 65.16 ± 12.17 mm. The mean distance between the midpoint of the acromioclavicular curvature and the acromial articular surface was 41.58 ± 4.85 mm. The mean sternoclavicular angle was 153.31 ± 9.53° and the mean acromioclavicular angle was 119.95 ± 10.92°. The average thickness of the narrowest middle part of the clavicle was 11.61 ± 1.77 mm. The mean projection distance from the middle part of the clavicle to the most prominent point of the conoid tubercle was 43.81 ± 6.33 mm. The distances from the middle part of the clavicle to the medial trapezoid line and to the lateral impression of the costoclavicular ligament were 50.10 ± 6.31 mm and 42.29 ± 5.88 mm, respectively. The mean projected clavicular length was 142.76 ± 12.29 mm. Conclusions: In conclusion, these findings offer an anatomical reference that may assist radiological evaluation of clavicular shortening and support orthopaedic surgeons in implant selection and planning of ligament reconstruction procedures.