CAJ | 학술논문

目的通过定期拍摄锥体束CT(CBCT,Cone-Beam CT)观察小型猪扩弓前后及保持期的后牙颊侧骨板变化,了解扩弓力如何影响后牙颊侧骨板的改建.方法选用10月龄雄性巴马小型猪8只,随机分为实验组5只,对照组3只.分别在扩弓前(T1),扩弓10天后(T2),保持3个月(T3)后拍摄CBCT,测量后牙颊侧牙槽骨高度和厚度的变化(△BMBL,△BBT).结果上颌后牙颊侧牙槽骨高度指标BMBL和厚度指标BBT在T2期与对照组相比均出现明显变化(P＜0.05),T3期与T2期相比,BMBL和BBT均无明显改变(P＞0.05)；△BMBL与△BBT之间存在显著性相关(γ=-0.96,P＜0.01),扩弓前BBT与△BBT、△BMBL之间存在显著性相关(γ=-0.90,P＜0.05;γ=-0.84,P＜0.05).结论上颌快速扩弓后颊侧牙槽骨高度、厚度均发生明显减小；扩弓前颊侧牙槽骨厚度与发生牙槽骨吸收的可能性存在负相关,能为临床选择扩弓方式提供一定参考依据.
목적 통과정기박섭추체속CT(CBCT,Cone-Beam CT)관찰소형저확궁전후급보지기적후아협측골판변화,료해확궁력여하영향후아협측골판적개건.방법 선용10월령웅성파마소형저8지,수궤분위실험조5지,대조조3지.분별재확궁전(T1),확궁10천후(T2),보지3개월(T3)후박섭CBCT,측량후아협측아조골고도화후도적변화(△BMBL,△BBT).결과 상합후아협측아조골고도지표BMBL화후도지표BBT재T2기여대조조상비균출현명현변화(P＜0.05),T3기여T2기상비,BMBL화BBT균무명현개변(P＞0.05)；△BMBL여△BBT지간존재현저성상관(γ=-0.96,P＜0.01),확궁전BBT여△BBT、△BMBL지간존재현저성상관(γ=-0.90,P＜0.05;γ=-0.84,P＜0.05).결론 상합쾌속확궁후협측아조골고도、후도균발생명현감소；확궁전협측아조골후도여발생아조골흡수적가능성존재부상관,능위림상선택확궁방식제공일정삼고의거.
Objective To explore the changes of maxillary buccal bone before RME,after RME and post retention using CBCT 3-dimensional imaging.Methods Eight male Bama mini-pigs at 10 months of age were randomly divided into two groups:Five pigs were in the experimental group and 3 in the control group.Before RME (T1),after RME (T2),3 months after retention (T3),all pigs were scanned using CBCT to analyze the thickness and height changes of buccal bone (BBT,△BMBL).Results BMBL,BBT representing the maxillary buccal alveolar bone height and thickness had significant changes at T2 compared with control group (P ＜ 0.05).BMBL and BBT had no significant change between T3 and T2 (P＞0.05).Significant corrlation was found between △BMBL and △BBT (γ=-0.96,P＜0.01),between BBT at T1 and △MBBT (γ=-0.90,P＜0.05),between BBT at T1 and △BMBL (γ=-0.84,P＜0.05).Conclusions Alveolar bone height and thickness decreased significantly after RME and the buccal alveolar bone thickness before RME had negative correlation with the possibility of alveolar bone absorption.