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Willy Dayan
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Journal Articles
Journal:
The Angle Orthodontist
The Angle Orthodontist (2021) 91 (2): 164–170.
Published: 12 January 2021
Abstract
ABSTRACT Objectives To investigate the skeletal and dentoalveolar effects of Invisalign's G5 protocol with virtual bite ramps in the treatment of adults with skeletal deep bites. Materials and Methods This retrospective study was conducted on consecutively treated adults presenting with skeletal deep bites as defined by the Overbite Depth Indicator (ODI). Subjects were divided into 2 groups: Invisalign group (n = 24) treated with the Invisalign G5 protocol and a full fixed appliance (FFA) group (n = 24) treated with edgewise FFAs and matched to the Invisalign group by ODI, sex, type of malocclusion, and non-extraction treatment. Pretreatment (T 1 ) and post–comprehensive treatment (T 2 ) lateral cephalograms were obtained and analyzed. Results Both the Invisalign and FFA groups showed significant changes from T 1 to T 2 in ODI and other skeletal and dentoalveolar measurements. The mean change in ODI was −1.5° ( P < .001) for the Invisalign group and −2.0° ( P < .001) for the FFA group. The mean decrease in overbite was 1.3 mm ( P < .001) and 2.0 mm ( P < .001) for the Invisalign and FFA groups, respectively. The mean increase in mandibular plane angle (Sn-GoGn) was 0.65° ( P = .003) for the Invisalign group and 1.15° ( P < .001) for the FFA group. When the groups were compared with each other, both ODI ( P = .03) and overbite ( P = .003) were significantly different in addition to other measurements. Conclusions Although FFA treatment had more apparent skeletal changes for deep bite adult patients when compared with Invisalign, both systems were effective in opening deep bites at dentoalveolar and skeletal levels.