The craniofacial pattern plays an important role in planning orthodontic treatment mechanics.
Inadequate dental decompensation may limit the amount of mandible setback and correction of chin prominence in skeletal Class III patients 1, 2, 3. In surgical-orthodontic treatment for severe Class III malocclusion, dental decompensation is crucial to maximize surgical correction and normalize stomatognathic function. Retroclination of the mandibular incisors is a frequent manifestation of dental compensation in adults with mandibular prognathism. The presurgical orthodontic treatment to decompensate mandibular anterior teeth should be very careful in all MPA groups. The facial divergence, incisor irregularity, tooth site, treatment time, and change in proclination were identified as the significant factors affecting alveolar bone thickness and height during treatment.
The results showed that the measurements of alveolar bone height generally decreased after treatment, regardless of MPA. Differences between T1 and T2 were analyzed by non-parametric tests and mixed-effect model analysis. T1 and T2 images were superimposed and analyzed for bone thickness and height at the level of root apex on each mid-sagittal slice of six mandibular anterior teeth.
#TYPE 3 MANDIBULAR BONE HEIGHT SOFTWARE#
The DICOM files of CBCT scans and STL files of digital dental models, taken before (T1) and after (T2) presurgical orthodontic treatment, were imported into Dolphin imaging software to reconstruct dentoskeletal images. The records of 29 consecutive Class III patients selected from those pending two-jaw orthognathic surgery were divided into low (≤ 28°), average (30°–37°), and high (≥ 39°) mandibular plane angle (MPA) groups. This study aimed to investigate alveolar bone change around mandibular anterior teeth during orthodontic decompensation in patients with skeletal Class III malocclusion and different vertical facial patterns.
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