无托槽隐形矫治上颌扩弓效率的影响因素

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[中图分类号]R783.5 [文献标志码]A [doi] 10.7518/gjkq.2025086

[Abstract]ObjectiveToassess thefactors influencing the eficiencyofmaxillary expansionduring clearaligner treatment （CAT）.MethodsA total of 54 nonextraction CAT patients undergoing maxilary expansion were selected. Baseline data werecollcted，andcrown lengthswere measuredviacone-beamcomputed tomography（CBCT）.Amodeloverlap was used to measure the maxillary expansion eficiency and torque changes.Linear analysis was performed to identify factorsinfluencing expansion efficiency.ResultsSingle-factor linearanalysisrevealedthatmaxilaryfirst-molarexpansionefficincywassignificantlyinfluenced byage，rootlength，crown-rootratio，atachmentdesign，designedandactual expansion amount， actual torque changes，and designed-actual torque changes （P<0.05） .Stepwise multivariate linear analysis identified thecrown-rootratio，atachment design，nd designedandactual expansionamountassignificantlyaffectingmaxillary first-molar expansion efficiency （P<0.05） .Conclusion During CAT expansion treatment，to the focus shouldbeon the patient’scrown-rotratio.Bilateral atachment designandcarefulconsiderationof expansion amount limits in treatment planning are crucial to enhancing patient expansion efficiency.

[Key words] maxillary expansion; clear aligner treatment; cone-beam computed tomography

无托槽隐形矫治（clearalignertreatment，CAT）目前已成为解决多种错畸形的正畸治疗手段之一。（剩余8563字）