| Total number | Medial perforation | Lateral perforation | Anterior perforation | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Grade1 | Grade 2 | Grade 3 | Grade1 | Grade 2 | Grade 3 | Grade1 | Grade 2 | Grade 3 | ||
T1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 1(convex) | 0 | 0 |
T2 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 1(concave) | 0 | 0 |
T3 | 21 | 0 | 0 | 0 | 0 | 0 | 1(convex) | 1(concave) | 0 | 0 |
T4 | 54 | 0 | 0 | 0 | 0 | 4(1 concave, 3 convex) | 1(convex) | 3(concave) | 1(concave) | 0 |
T5 | 61 | 0 | 0 | 0 | 0 | 0 | 4(convex) | 0 | 0 | 0 |
T6 | 46 | 3(2 concave, 1 convex) | 1(convex) | 0 | 0 | 1(convex) | 1(convex) | 0 | 0 | 0 |
T7 | 51 | 1(convex) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
T8 | 44 | 1(convex) | 0 | 0 | 0 | 2(1 convex, 1 concave) | 0 | 0 | 0 | 0 |
T9 | 57 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
T10 | 44 | 0 | 0 | 0 | 0 | 3(concave) | 2(concave) | 0 | 0 | 0 |
T11 | 54 | 0 | 0 | 0 | 1(concave) | 0 | 0 | 0 | 0 | 0 |
T12 | 55 | 0 | 1(convex) | 0 | 0 | 0 | 0 | 0 | 0 | 0 |