From: Is arch form influenced by sagittal molar relationship or Bolton tooth-size discrepancy?
Arch Form | Egyptian [25] (n = 94) | Caucasian [25] (n = 92) | Israeli [24] (n = 134) | Korean [23] (n = 368) | Japanese [22] (n = 160) | Saudi Present Study (n = 230) |
---|---|---|---|---|---|---|
Square | 29 (31Â %) | 19 (21Â %) | 23 (17.2Â %) | 172 (46.7Â %) | 73 (45.6Â %) | 64 (27.8Â %) |
Ovoid | 37 (39Â %) | 39 (42Â %) | 68 (50.7Â %) | 127 (34.5Â %) | 68 (42.5Â %) | 87 (37.8Â %) |
Tapered | 28 (30Â %) | 34 (37Â %) | 43 (32.1Â %) | 69 (18.8Â %) | 19 (11.9Â %) | 79 (34.3Â %) |
p-value | 0.714 | 0.409 | 0.024* | <0.0001* | <0.0001* | Â |