Introduction: the patella is a bone located in thickness of the tendon of the quadriceps femoral muscle, being a constituent of the patellofemoral joint. Knowledge of its morphology is important to comprehend better the clinical and surgical conditions that affect this joint. The objective of the present study was to analyze the morphology of patella in human skeletons in a population in Northeastern Brazil. Material and Methods: 59 patella in a population in Northeastern Brazil were analyzed. The quantitative analysis includes measurements of the medial articular facet and the lateral articular facet of the patella. Qualitatively, the parameters observed were the patella shape, the presence of emargination and the type of patella, based on the width of the articular facets (Types I, II or III). Values of p<0,05 were considered significant. Results: the predominance of triangular shape in both sides (52.6%). We have accounted 54.2% emarginated patella, with a higher frequency on the left side (64.5%). There has been a higher amount of Type II (84.8%) patella, in which the medial articular facet is considerably smaller than the lateral one. The mean width of the medial articular facet was 18.20±0.52mm (11.90-24.20mm) on the right side, and 18.71±0.51mm (14.40-26.20mm) on the left side (p=0.48), whereas the lateral articular facet mean width was 24. 49±0.34mm (20.80-27.70mm) on the right side, and 23. 88±0.51mm (17.20-29.60mm) on the left side (p=0.33). Conclusion:For the first time, the morphometry of the patella was observed and registried in a population in Northeastern Brazil. The overall predominance of patella in this population is a triangular shape, with emargination and Type II or B.
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