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Patellar tilting (P = 0.015) and congruence angle (P = 0.018) significantly improved postoperatively.
Both the patellar tilting angle (P = 0.015) and the congruence angle (P = 0.018) significantly improved postoperatively.
The congruence angle measured the position of the patella in relation to the center of the trochlea groove.
The authors found that pain and function in WOMAC and McCarroll scores were significantly improved, but the Insall-Salvati index and congruence angle decreased compared with the preoperative index.
Radiological evaluation demonstrated a definite correction of the congruence angle.
The following parameters were assessed: Caton index, sulcus angle, congruence angle, and patellofemoral angle.
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Moreover, Masri and McCormack (1995) reported that patellar congruence angles are not influenced by quadriceps contractions.
The mean preoperative patellofemoral congruence angles were 12.6° (range, 1°-39°) in group A and 11.5° (range, 2°-38°) in group B. There was no statistical significance (p = 0.716).
After Poncelet discovered that Desargues's theorem could be more simply formulated in projective space, other theorems followed within this framework that could be stated more simply in terms of only intersections of lines and collinearity of points, with no need for reference to measures of distance, angle, congruence, or similarity.
Radiographs taken before and after surgery in anteroposterior (AP), lateral and "merchant view" projections were used to determine the Insall-Salvati index of patellar height, the congruence and the sulcus angle, being indicative of the shape of the patella and the femoral groove, as an index of subluxation.
Patellofemoral congruence was measured using the Merchant angle (Merchant et al. 1974) and the sulcus angle of Brattström (1964).
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