Abstract / Summary
Abstract Purpose Precontoured anatomical clavicle plates are designed predominantly from Western morphometric data, and ethnic variation in clavicular anatomy may compromise plate-to-bone congruency in Indian patients. This study evaluated the congruency of a precontoured anatomical clavicle plate in an Indian population using computed tomography (CT)-based mathematical modelling and the Clavicle Congruence Score (CCS). Methods In this hospital-based observational study conducted at a tertiary care hospital in South India between May 2024 and October 2025, adult patients undergoing CT of the thorax or neck were included after applying predefined eligibility criteria. Three-dimensional reconstructions were used to derive clavicular morphometric parameters, and a commercially available anatomical clavicle plate was virtually superimposed on each reconstruction to measure vertical plate-to-bone gap and anterior and posterior overhang. Plate fit was graded by the CCS as anatomical, good or poor. Results Twenty-two clavicles from 22 participants (mean age 44.6 ± 16.3 years; 63.6% male) were analysed. Mean clavicular length was 143.6 ± 10.8 mm. Mean vertical plate-to-bone gap was 2.4 ± 1.6 mm, with mean anterior and posterior overhang of 1.8 ± 1.4 mm and 2.0 ± 1.5 mm, respectively. CCS grading showed anatomical fit in 27.3%, good fit in 45.4% and poor fit in 27.3% of clavicles. Conclusion Considerable morphological variability was observed, and the evaluated plate did not achieve anatomical fit in a substantial proportion of Indian clavicles, supporting preoperative anatomical assessment and population-specific implant design. Level of Evidence: Level IV, observational study.