Evaluation of minimal versus conventional presurgical orthodontics in skeletal class III patients treated with two-jaw surgery.
OBJECTIVE
The purpose of this study was to compare changes in hard and soft tissues and the treatment efficacy of 2-jaw surgery combined with nonextraction treatment for skeletal Class III malocclusion in patients who received minimal presurgical orthodontics (MPO) versus those who received conventional presurgical orthodontics (CPO).


METHODS
Thirty-two patients (16 in each group) with skeletal Class III malocclusion who underwent 2-jaw surgery were included in the study. Serial lateral cephalometric films were traced at 4 stages: before treatment (T0), before surgery (T1), 1 month after surgery (T2), and at debonding (T3). Cephalometric measurements and treatment duration were compared using independent t test and Mann-Whitney U test.


RESULTS
After the presurgical treatment phase, the angle between the lower incisor axis and mandibular plane, overjet, and soft tissue pogonion to the vertical reference line showed larger changes (P < 0.01) in the CPO group, whereas the pogonion to the horizontal reference line showed larger changes (P < .05) in the MPO group. In the postsurgical phase (T2 to T3), there were no significant differences between the 2 groups. Total treatment duration was significantly shorter in the MPO group.


CONCLUSIONS
There were no significant differences between the MPO and CPO groups in the hard and soft tissue cephalometric variables. The MPO group had a shorter total treatment time. It is therefore recommended that clinicians consider these results when selecting MPO as a treatment option for accurate diagnosis and treatment planning of Class III surgical patients.
Former Graduate Student, Graduate School, The Catholic University of Korea, Seoul, Korea.
Byungju
B
Joh
Mohamed
M
Bayome
Jae Hyun
JH
Park
Je Uk
JU
Park
Yoonji
Y
Kim
Yoon-Ah
YA
Kook
D000293:Adolescent; D000328:Adult; D002508:Cephalometry / Q000379:methods; D002680:Chin / Q000473:pathology; D015331:Cohort Studies; D003724:Dental Arch / Q000473:pathology; D005145:Face; D005147:Facial Bones / Q000473:pathology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007180:Incisor / Q000473:pathology; D008297:Male; D008313:Malocclusion, Angle Class III / Q000601:surgery / Q000628:therapy*; D008334:Mandible / Q000473:pathology; D008437:Maxilla / Q000473:pathology; D008875:Middle Aged; D008963:Molar / Q000473:pathology; D009971:Orthodontics, Corrective / Q000379:methods*; D056948:Orthognathic Surgical Procedures / Q000379:methods*; D019340:Osteotomy, Le Fort / Q000379:methods; D059229:Osteotomy, Sagittal Split Ramus / Q000379:methods; D012189:Retrospective Studies; D012658:Sella Turcica / Q000473:pathology; D013997:Time Factors; D016896:Treatment Outcome; D055815:Young Adult