During placement of miniscrews in the aveolar process, increased failure rates were noticed among those contacting adjacent roots. Failed miniscrews appeared to be surrounded with a greater volume of soft tissue. When more inflammation was present, the adjacent roots seemed to experience more resorption. Nevertheless, the created lesion was repaired with a narrow zone of mineralized tissue deposited on the root surface, which was likely cellular cementum, and was mainly filled with alveolar bone, with the periodontal ligament space being maintained.

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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. 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. 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. 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. Differences between T1 and T2 were analyzed by non-parametric tests and mixedeffect model analysis. The results showed that the measurements of alveolar bone height generally decreased after treatment, regardless of MPA. 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 presurgical orthodontic treatment to decompensate mandibular anterior teeth should be very careful in all MPA groups. Retroclination of the mandibular incisors is a frequent manifestation of dental compensation in adults with mandibular prognathism. In surgical-orthodontic treatment for severe Class III malocclusion, dental decompensation is crucial to maximize surgical correction and normalize stomatognathic function. Inadequate dental decompensation may limit the amount of mandible setback and correction of chin prominence in skeletal Class III patients 1-3. The craniofacial pattern plays an important role in planning orthodontic treatment mechanics. The cortical bone thickness of dentoavleolar ridge has been reported to be greater in adults with facial hypodivergence than in those with hyperdivergence 4-6. In a previous study, the smallest mandibular cortical bone thickness was noted in patients with hyperdivergent facial pattern, and the mandibular bone thickness differed more than bone height among long-face, short-face, and average-face groups 7. In another study, Class III patients with high-MPA vertical pattern exhibited the smallest alveolar bone thickness compared to other types of malocclusions with vertical and sagittal jaw discrepancy 8. Furthermore, the vertical facial pattern has been reported as a dentofacial trait significantly affecting cancellous bone thickness in the alveolar process of the mandibular incisors 9. Other studies demonstrated that a change in tooth position alters the thickness of labial and lingual cortical plates at the level of the root apex 10. Significant correlation has been reported between incisor inclination and morphological contour of the alveolar bone in patients with skeletal Class III malocclusion 11,12. Cone-beam computed tomography (CBCT) images have rev...

Three-dimensional planning of a dental-implant site is critical when implants are to initially be used as orthodontic anchorage for tooth movement and to later serve as prosthetic abutments. The combined orthodontic and prosthetic implant restorative treatment of an adult patient with multiple missing teeth, an upper midline deviation, and malocclusion is described in this article. Plastic model bases combined with customized position plates allowed the precise transfer of the proposed implant position from the diagnostic arrangement to the original cast to avoid compromising subsequent orthodontic tooth movement.