Occlusal plane change after intrusion of maxillary posterior teeth by microimplants to avoid maxillary surgery with skeletal Class III orthognathic surgery.
BACKGROUND
To increase stability and mandibular setback movement, surgical maxillary impaction is normally performed with mandibular setback surgery in treating adult skeletal Class III patients. This article demonstrates the use of microimplants for anchorage to intrude molars and the resultant rotation of the maxillary occlusal plane clockwise to increase the surgical mandibular setback and reduce the posterior vertical dimension instead of maxillary surgical impaction.


RESULTS
A 21-year-old man with mandibular prognathism was treated with mandibular setback surgery that included orthodontic treatment for decompensation. Microimplants placed into the palatal alveolar bone between the maxillary first and second molars were used to intrude the maxillary posterior teeth and change the occlusal plane clockwise. This produced 4 mm more of distal movement of the chin during mandibular setback surgery compared with the surgical prediction with no change in the occlusal plane. These results were similar to those of 2-jaw surgery with maxillary posterior impaction.


CONCLUSIONS
The intrusion of the maxillary posterior teeth with microimplants might prevent the need for maxillary surgery in adult skeletal Class III patients.
Department of Orthodontics, School of Dentistry, Kyungpook National University, Daegu, Korea. parkhs@knu.ac.kr
Hyo-Sang
HS
Park
Ji-Yeun
JY
Kim
Tae-Geon
TG
Kwon
D002508:Cephalometry; D002680:Chin / Q000473:pathology; D003724:Dental Arch / Q000473:pathology; D015921:Dental Implants; D003766:Dental Occlusion; D005500:Follow-Up Studies; D006801:Humans; D007180:Incisor / Q000473:pathology; D008297:Male; D008313:Malocclusion, Angle Class III / Q000601:surgery*; D008334:Mandible / Q000601:surgery; D008437:Maxilla / Q000473:pathology*; D008963:Molar / Q000473:pathology*; D052280:Orthodontic Anchorage Procedures / Q000295:instrumentation*; D056948:Orthognathic Surgical Procedures; D010159:Palate / Q000601:surgery; D010347:Patient Care Planning; D011378:Prognathism / Q000601:surgery; D012399:Rotation; D014087:Tooth Movement Techniques / Q000295:instrumentation* / Q000379:methods; D016896:Treatment Outcome; D014716:Vertical Dimension; D055815:Young Adult
D015921:Dental Implants