The measurement of W angle in the subjects with normal occlusion and in those with malocclusion of Han nationality
ZHANG Jie-yun
ZHOU Wei-wei
CAO Jun
Abstract：AIM:To analyze the distribution range of W angle in normal adults and in those with different sagittal malocclusion of Han nationality. METHODS:W angle was measured on lateral cephalometric X-ray films of 120 subjects with normal occlusion (60 male and female) and 180 with ClassⅠ,ⅡandⅢmalocclusion respectively (n=30), the difference of W angle value of the sujects with different sagittal malocclusion was nalyzed. RESULTS:The mean value of the W angle(°) in Han male and female adults with normal occlusion was 59. 94 ± 4. 21 and 58. 03 ± 2. 90 respectively (P>0. 05). The mean value for the W angle in the subjects with ClassⅠ,ⅡandⅢmal-occlusion was 58. 07 ± 2. 96, 55. 12 ± 3. 48 and 64. 85 ± 4. 84 respectively(P<0. 05). CONCLUSION:The normal value of W angle can be used to evaluate the relationship between anterior-posterior direction of maxilla and mandi-ble. Skeletal class I malocclusion:56. 46°≤W≤61. 28°;Skeletal classⅡmalocclusion:W<56. 46°;Skeletal classⅢ malocclusion:W>61. 28°.
Keywords：W angleadultcephalometricnormal valuesagittal bonemalocclusion
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 276-279 )