Study on the correlation between the growth and eruption of the mandibular third molar and the crowding of the mandibular dentition
10.13591/j.cnki.kqyx.2025.11.002
- VernacularTitle:下颌第三磨牙生长及萌出情况与下颌牙列拥挤度的相关性研究
- Author:
Yuting WANG
1
;
Min HU
;
Wei FAN
;
Qihui GU
;
Zhendong WANG
;
Linlin ZHU
Author Information
1. 南京医科大学附属口腔医院南苑门诊部,口腔疾病研究与防治国家级重点实验室培育建设点,江苏省口腔转化医学工程研究中心,江苏南京(210029)
- Publication Type:Journal Article
- Keywords:
mandibular third molar;
dental crowding;
CBCT;
orthodontic treatment
- From:
STOMATOLOGY
2025;45(11):808-812,818
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the association between the growth condition of mandibular third molars(M3)and the parameters of mandibular dental arch through a retrospective cross-sectional study on M3 in adults,and to provide a basis for the selection of clini-cal treatment of M3.Methods A total of 221 adult patients were randomly selected for our study.Dolphin software was used to analyze the CBCT of all the patients.Parameters of the mandibular dentition including the entire dental crowding(EDC)were recorded.Then the association between M3 growth condition and these parameters was analyzed.Results The mesio-impacted angle of M3 was posi-tively correlated with EDC(P＜0.05),and negatively correlated with the retromolar space(RMS,P＜0.0 1).It was worth noting that me-dian mesio-impacted M3 significantly increased EDC(P＜0.01),and the erupting M3 in the vertical orthotopic position significantly in-creased RMS(P＜0.01).Conclusion For patients with median mesio-impacted M3 or insufficient RMS,preventive removal of M3 may be considered clinically,which may help to reduce crowding and prevent relapse after orthodontic treatment.
