Augmented corticotomy-assisted presurgical orthodontic treatment to prevent alveolar bone loss in patients with skeletal Class III malocclusion

Ma, Huimin; Xu, Li; Hou, Jianxia; Wang, Xiaoxia; Li, Weiran; Li, Xiaotong

doi:10.1016/j.ajodo.2021.10.021

Cited by 8 publications

(11 citation statements)

References 31 publications

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“…The labial-alveolar bone area can be signi cantly increased by AC after presurgical orthodontic treatment. Ma et al [21] found that before orthognathic surgery, the labial alveolar bone area in the AC group increased by 8.32 ± 5.91mm 2 , whereas on the lingual side, the alveolar bone area decreased by 6.14 ± 5.31mm 2 . In this study, after performing LLAC on the lower anterior teeth, the area of the labial alveolar bone increased by 8.48 ± 4.59mm 2 .…”

Section: Discussionmentioning

confidence: 99%

“…Presently, labial AC has been widely used in the orthodontic-orthognathic treatment of Class III patients, and the effect on soft and hard tissues has been widely con rmed [9][10][11][12][13]. However, the risk of alveolar bone height reduction, dehiscence, gingival recession, and apical root exposure on the lingual side was not reduced [21]. Consistent with that study [15,[21][22], alveolar bone height and bone contour area of the lingual side decreased signi cantly in the NS group in this study before the orthognathic operation.…”

Section: Discussionmentioning

confidence: 99%

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Simultaneous Labial and Lingual Augmented Corticotomy Assisted Presurgical Orthodontics in Class III Patients: The Morphological Aspects of the Mandibular Anterior Ridge with Cone-beam computed tomography

Liu,

Li,

et al. 2024

Preprint

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Objectives: To investigate alveolar bone changes after simultaneously performing labial and lingual augmented corticotomy (LLAC) in patients with insufficient thickness of the alveolar bone in the labial and lingual sides of the mandibular anterior teeth during presurgical orthodontic treatment. Materials and Methods:Twenty-four surgical patients with skeletal Class III malocclusion were included: 10 (LLAC group) accepted LLAC surgery during presurgical orthodontic treatment, and 14 (non-surgery group, NS) accepted traditional presurgical orthodontic treatment. Cone-beam computed tomography (CBCT) scans were obtained before treatment (T0) and at the completion of presurgical orthodontic treatment (T1). The amount of vertical alveolar bone and contour area of the alveolar bone in the labial and lingual sides of mandibular incisors were measured. Results: After presurgical orthodontic treatment, the contour area of the alveolar bone at each level on the lingual side and alveolar bone level on both sides decreased significantly in the NS group (P <0.001). However, the labial and lingual bone contour area at each level and bone level increased significantly in the LLAC group (P <0.001). The bone formation rate in the lingual apical region was the highest, significantly different from other sites (P <0.001). Conclusions: During presurgical orthodontic treatment, LLAC can significantly increase the contour area of the labio-lingual alveolar bone in the mandibular anterior teeth to facilitate safe and effective orthodontic decompensation in skeletal Class III patients. Clinical Relevance: This surgery has positive clinical significance in patients lacking bone thickness (< 0.5mm) in the labial and lingual sides of the lower anterior teeth.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Simultaneous Labial and Lingual Augmented Corticotomy Assisted Presurgical Orthodontics in Class III Patients: The Morphological Aspects of the Mandibular Anterior Ridge with Cone-beam computed tomography

Liu,

Li,

et al. 2024

Preprint

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“…25 Given that preoperative orthodontic treatment takes a long time, especially when extraction of maxillary premolars is needed with CAT, and CAT produces lingual tipping and extrusion of incisors during anterior retraction, 13,26 which may increase root resorption and periodontal risks, such as fenestration or dehiscence. 4,27 In recent years, various attempts, such as regenerative corticology 28 and anterior segmental subapical osteotomy, have been reported for incisor axis correction. [29][30][31][32] In addition, rotational maxillary setback in 2-jaw surgery has been used to decompensate the inclination of the maxillary incisors by surgery.…”

Section: Discussionmentioning

confidence: 99%

The Efficiency of Segmental Le Fort I Surgery in Clear Aligner Therapy of Skeletal Class III Deformity: A Pilot Study

Xiao,

Wu,

Yeweng

2024

Journal of Craniofacial Surgery

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Introduction: The purpose of this study was to investigate the efficiency of segmental Le Fort I osteotomy in clear aligner therapy of skeletal Class III deformities and to explore whether Le Fort I segmental osteotomy was effective for maxillary incisor axis correction and reduced the duration of perioperative orthodontics. Materials and Methods: Patients who had skeletal Class III deformities (ANB<0) treated with extraction of the maxillary first premolars, segmental Le Fort I osteotomy, and clear aligners therapy were included in this retrospective study. We measured the amount of tooth extraction space that was closed by surgery and recorded the preoperative orthodontic and total treatment duration. Lateral cephalograms were analyzed to measure changes of maxillary incisor inclination before treatment (T0), 1 week before surgery (T1), 1 week after surgery (T2), and after total orthodontic treatment (T3). Statistical analyses were performed, and the P value was set at 0.05. Results: The sample was composed of 15 patients aged 19 to 30 (M=22.9) years. The average preoperative orthodontic treatment duration was 16.2±5.22 mo, with 33.5 pairs of clear aligners. The gap at the extraction site decreased from 5.42±1.57 mm to 0.80±0.62 mm on average after surgery. U1-SN and U1-NA(deg) increased sparingly with preoperative decompensation, decreased in quantity after surgery, and then slightly increased with postoperative compensation (T2<T3<T0<T1; △U1-SN, △U1-NA: T1-T2, P<0.05; T0-T1 and T2-T3, P >0.05). Conclusions: Le Fort I segmental osteotomy assisted decompensation of the upper anterior teeth and reduced the duration of preoperative orthodontics with clear aligners.

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“…Orthodontic treatment and AC surgery procedures were the same as in the study by Ma et al. 20 All patients were treated with fixed straight-wire appliances of Roth system. The archwire sequence involved 0.014-inch, 0.016-inch, 0.018-inch, and 0.018 × 0.025-inch nickel-titanium wires followed by a 0.018 × 0.025-inch stainless steel wire.…”

Section: Methodsmentioning

confidence: 99%

Augmented corticotomy-assisted presurgical orthodontic treatment to prevent alveolar bone loss in patients with skeletal Class III malocclusion

Cited by 8 publications

References 31 publications

Simultaneous Labial and Lingual Augmented Corticotomy Assisted Presurgical Orthodontics in Class III Patients: The Morphological Aspects of the Mandibular Anterior Ridge with Cone-beam computed tomography

Simultaneous Labial and Lingual Augmented Corticotomy Assisted Presurgical Orthodontics in Class III Patients: The Morphological Aspects of the Mandibular Anterior Ridge with Cone-beam computed tomography

The Efficiency of Segmental Le Fort I Surgery in Clear Aligner Therapy of Skeletal Class III Deformity: A Pilot Study

Effect of augmented corticotomy-assisted presurgical orthodontic treatment on alveolar bone fenestration and dehiscence in skeletal class III patients

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