Use of onplants as stable anchorage for facemask treatment: a case report.
A hexagonal onplant of 7.7 mm diameter was placed on the palatal bone of the maxilla in an 1-year five-month-old female patient with a Class III malocclusion and midface deficiency. Elastic traction (400 g per side) was applied from a facemask to the onplant at 30 degrees to the occlusal plane 12 hours per day for 12 months. The maxilla was found to have displaced forward and downward by 2.9 mm. The mandible was rotated downward and backward. There was a 3 degrees increase in mandibular plane angle and an increase in the lower face height. Clinically, there was a significant improvement in midface esthetics, noted by an increase in fullness of the infraorbital region and correction of the skeletal discrepancy between the maxillary and mandibular jaw relationship. Contrary to the reports that use teeth rather than onplants as anchorage, there was no forward movement of the maxillary molars and minimal extrusion of the maxillary molars. These results suggest that onplants can be used as an extremely stable anchorage for maxillary orthopedic facemask treatment.
Hong
He
H
Key Lab for Oral Biomedical Engineering of Ministry of Education, School of Stomatology, Wuhan University, Wuhan, China.
Ngan
Peter
P
Han
Guangli
G
Li
Han Guang
HG
Qi
Liu Gong
LG
Wei
Stephen H Y
SH
D002508:Cephalometry; D002648:Child; D003724:Dental Arch / Q000033:anatomy & histology; D005115:Extraoral Traction Appliances; D005260:Female; D006801:Humans; D008310:Malocclusion / Q000628:therapy; D008313:Malocclusion, Angle Class III / Q000628:therapy*; D008334:Mandible / Q000033:anatomy & histology; D008437:Maxilla / Q000033:anatomy & histology; D016382:Orthodontic Appliance Design; D010155:Palatal Expansion Technique / Q000295:instrumentation*; D010159:Palate / Q000601:surgery; D016896:Treatment Outcome