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Phillip D. Hamilton: Comparison of Open Bite Closure Outcomes: Clear Aligners vs. Skeletal Anchorage Molar Intrusion (Under the direction of Ching-Chang Ko) This retrospective study assessed treatment effects during open bite treatment with clear aligners versus skeletal anchorage. The sample consisted of 92 consecutive patients with anterior open bites from 3 practices. 8 measurements assessing vertical skeletal and dental relationships were calculated. Patients were divided by clear aligner and skeletal anchorage. Clear aligner patients were further divided by programmed movement: incisor extrusion, molar intrusion, or combination; and by the use of bite blocks. One-way ANOVA statistics were calculated for all comparisons. Clear aligner groups demonstrated no statistically significant difference for any variables of treatment design. Skeletal anchorage treatment compared to clear aligners demonstrated significant differences in LFH, U6-PP, and Occl plane to SN. Results demonstrate clear aligner open bite closure is effective primarily by way of incisor extrusion regardless of appliance design. This also demonstrates skeletal anchorage treatment preserves incisor position and affects skeletal change more predictably compared to clear aligners. |
