Automatic drift of the third molar after the extraction of the second molar
- VernacularTitle:拔除第二恒磨牙后第三磨牙自行迁移的临床研究
- Author:
Yao LIU
;
Yinzhong DUAN
;
Zuolin JIN
- Publication Type:Journal Article
- Keywords:
Second molar;
Tooth extraction;
Third molar;
Orthodontics
- From:
Journal of Practical Stomatology
1995;0(04):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the third molar horizontal and vertical drift automatically after the second molar extraction.Methods: 26 patients,aged 11～18 years old, with the indications of second morlar extraction were divided into two groups:15 cases in experimental group with the extraction of the second molar and 11 in control group without the extraction. A cephalometric radiograph of each patient was traced on before and 9 months after treatment. Vertical and horizontal drift and mesio- angulation of the third molar were measured.Results:The third molar vertical mesio-movement (mm)in experimental and control groups was 7.08?2.04 and 2.09?0.47(P
