Measurement of warping angle in human rib graft; Experimental study

To determine the warping angle of the costal cartilage in vivo. A nasal framework reconstruction with a rib graft was performed in a total of 130 patients. After the cartilage specimens were prepared, the remaining grafts were used for the experimental study. The angle of warping in all grafts was measured at 0, 30, and 60 minutes, after 24 hours and after one week. In this study, 8 subgroups of graft thicknesses from central and peripheral groups, which were determined according to the perichondral distance of the grafts, were evaluated, and the warping angles of a total of 48 osteochondral and chondral grafts were individually measured. Three-way analysis of variance was used to compare the change in warping over time to detect differences in the grafts. Significant differences were not observed in the 1-3 mm thick grafts of peripheral and central origin before 30 minutes(P>0.05), although significant differences were observed in these groups for all time periods after 30 minutes(P0.05). In the central origin grafts thinner than 1 mm, significant differences were not observed in the warping angle for all time periods(P>0.05), although significant differences were observed in the same grafts of peripheral origin(P