Comparison of AdvanSync2^® and Twin Block Appliances in Treatment of Class II Malocclusion With Retrognathic Mandible—An Observational Retrospective Study

Objectives: To evaluate the treatment outcomes between Twin Block and AdvanSync2 ® appliances by comparing skeletal, dentoalveolar, soft tissue changes. Materials Methods: Radiographic data of 20 patients were retrospectively analyzed. Data selected from in their skeletal growth spurt as evaluated cervical vertebral maturation method (CVMI 2, 3, 4), with class II malocclusion characterized retrognathic mandible (ANB > 4°, SNB < 77°, FMA = 25 ± 5°, overjet 5 mm). There 10 each group that underwent orthodontic correction for malocclusion: either using or . Independent t test Paired chi-square tests used analysis. The level statistical significance was set at P value ?.05. Results: chronological age similar both groups. Records taken functional mean span 8 1 month. Changes (group I 1.59°, 3.11°) ( .01), Co-Gn 2.89 mm, 5.34 mm), U1-L1° ?1.51°, 2.97°) showed statistically different outcome groups, when pre-post studied. Rest variables—cranial base, maxillary mandibular intermaxillary, vertical tissue—showed .05). Conclusion: Both lead to desirable malocclusion. resulted inducing more changes effective length compared Block. Overjet molar relation improved significantly appliances.