Studying Auxiliary Segmental Lingual Appliances to Improve the Curve of Wilson at Second Molars in Orthodontic Treatment

What this Trial Is About

Researchers are evaluating the effectiveness of auxiliary segmental lingual appliances in leveling the Curve of Wilson at the second molars for patients undergoing labial fixed orthodontic treatment. This study focuses on patients with an excessive deep Curve of Wilson at the second molars on both sides, which means a lingually inclined mandibular second molar. Using a split-mouth design, one side of the mouth will receive the appliance while the other side serves as a control to compare the results. The study involves applying auxiliary segmental lingual appliances to one side of the mouth to adjust the lingual inclination and level the lingual cusps of the mandibular second molar. The other side will not receive this intervention. Measurements of the Curve of Wilson at the second and first molars, and the distance from the mesiolingual and distolingual cusps of the second molar to the occlusal plane of the first molar will be taken using digital impressions at three time points baseline, after leveling with a stainless steel labial archwire, and three months after appliance application. Participants will be assessed through digital impressions at baseline, six months, and nine months to measure changes in the Curve of Wilson and cusp distances. Researchers will compare the treated and untreated sides to evaluate the appliances impact on occlusal plane balance. The study will monitor these changes over nine months to understand how the appliances affect orthodontic treatment outcomes for patients with malocclusion issues.

Effectiveness of Auxiliary Segmental Lingual Appliances in Leveling the Curve of Wilson at Second Molars