American Journal of Orthodontics and Dentofacial Orthopedics
Original articleProgressive changes in patients with skeletal Class III malocclusion treated by 2-jaw surgery with minimal and conventional presurgical orthodontics: A comparative study
Section snippets
Material and methods
This retrospective cohort study included consecutive patients who underwent orthognathic and orthodontic treatment at Peking University School and Hospital of Stomatology in Beijing, China, from 2010 to 2014. The inclusion criteria were as follows: skeletal Class III malocclusion (ANB, ≤0°, with or without facial asymmetry); no extractions, except for the third molars; history of bimaxillary surgery (1-piece LeFort I osteotomy, bilateral sagittal split ramus osteotomy, and genioplasty, if
Results
There were no significant differences in the initial skeletal and dental measurements between the MPO and CPO groups (Table II).
As shown in Table III, the presurgical and total durations in the MPO group were significantly shorter than those in the CPO group (P <0.001). A comparison of the mean changes in the cephalometric parameters from initial treatment to orthognathic surgery (T0-T1) between the MPO and CPO groups is given in Table IV. The changes in IMPA (MPO, 0.41°; CPO, 7.72°; P <0.01)
Discussion
In this study, we evaluated progressive skeletal and dental changes and postsurgical stability based on cephalometric investigations at various intervals in patients with skeletal Class III malocclusion treated with different presurgical treatment protocols (MPO or CPO). The comparisons included serial skeletal and dental changes and postsurgical stability between the groups. We also assessed the progressive tendency of changes in the horizontal and vertical dimensions.
Recently, Lee et al22
Conclusions
In this study, patients with skeletal Class III malocclusions were treated with MPO or CPO followed by bimaxillary surgery and observed for 12 months. The following conclusions were drawn.
- 1.
There were no significant differences in skeletal changes and treatment efficacy after surgery in the MPO and CPO groups, but the patients in the MPO group had much shorter presurgical durations and greater improvements of their facial esthetics at an early stage of treatment.
- 2.
During the postsurgical phase, the
References (24)
- et al.
Orthodontic preparation for orthognathic surgery: how long does it take and why? A retrospective study
Br J Oral Maxillofac Surg
(2003) - et al.
Patient motivation and response to surgical correction of prognathism
Oral Surg Oral Med Oral Pathol
(1976) - et al.
Are personality patterns and clinical syndromes associated with patients' motives and perceived outcome of orthognathic surgery?
J Oral Maxillofac Surg
(2010) - et al.
Evaluation on the psychosocial status of orthognathic surgery patients
Oral Surg Oral Med Oral Pathol Oral Radiol Endod
(2009) - et al.
Stability of mandibular setback surgery with and without presurgical orthodontics
J Oral Maxillofac Surg
(2014) - et al.
Evaluation of minimal versus conventional presurgical orthodontics in skeletal class III patients treated with two-jaw surgery
J Oral Maxillofac Surg
(2013) - et al.
Postsurgical stability after mandibular setback surgery with minimal orthodontic preparation following upper premolar extraction
J Oral Maxillofac Surg
(2013) - et al.
How does the amount of surgical insult affect bone around moving teeth?
Am J Orthod Dentofacial Orthop
(2014) - et al.
Interdental osteotomies induce regional acceleratory phenomenon and accelerate orthodontic tooth movement
J Oral Maxillofac Surg
(2014) - et al.
Accelerated orthodontic tooth movement following Le Fort I osteotomy in a rodent model
J Oral Maxillofac Surg
(2014)
Surgery-first accelerated orthognathic surgery: postoperative rapid orthodontic tooth movement
J Oral Maxillofac Surg
Comparison of progressive cephalometric changes and postsurgical stability of skeletal Class III correction with and without presurgical orthodontic treatment
J Oral Maxillofac Surg
Cited by (0)
All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest, and none were reported.