A regression analysis of the overcorrection for the mandibular anterior teeth in trusion with clear aligners
10.13591/j.cnki.kqyx.2024.05.002
- VernacularTitle:无托槽隐形矫治下前牙压低过矫治的回归分析研究
- Author:
Yangyang HUANG
1
;
Shiyu WANG
;
Hao LIU
;
Li YANG
;
Penglai WANG
;
Changyong YUAN
Author Information
1. 徐州医科大学口腔医学院,江苏徐州(221000)
- Keywords:
clear aligners;
anterior teeth intrusion;
efficiency;
linear regression;
overcorrection
- From:
STOMATOLOGY
2024;44(5):329-333,343
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore an overcorrection quantization method and related influencing factors through analyzing relationships between the achieved and preset intrusion values of mandibular anterior teeth with clear aligners.Methods Twenty pa-tients receiving Invisalign were recruited.The relative intrusion values in the ClinCheck software were recorded as the preset intrusion.The achieved intrusion values were measured through the digital model superimposition.Statistical analysis was conducted to assess the differences and linear relationships between the preset and achieved intrusion values,and investigate the effect of related factors such as intrusion amounts on the intrusion efficiency.Results For the mandibular anterior teeth,the mean intrusion efficiency was 62.2%,with the highest in the central incisors and the lowest in the canines.The intrusion amounts,incisors labial inclinations,and canine at-tachment types affected the intrusion efficiency.The differences between the preset and achieved values were significant,and the linear relationship existed.The formula of the intrusion overcorrection for the mandibular anterior teeth is"Z=(W-0.110)/0.533-W".Z re-presents the overcorrection and W represents the ideal intrusion.Conclusion The preset intrusion values in the treatment protocol could not be fully achieved.Moreover,correction should be designed in cases of mandibular canine intrusion,large amountsof intru-sion,orlingually inclined incisors.Compared to the optimized attachments,the vertical rectangular attachments on the mandibular ca-nines could improve the efficiency.
