The effect of mandibular tongue cribs on dentoskeletal changes in patients with Class II Division 1 malocclusions.
OBJECTIVE
To investigate the effect of a modified tongue crib appliance in Class II Division 1 patients with anterior tongue thrust and mandibular deficiency.


METHODS
Twenty-three patients (14 females, 9 males) with a mean age of 10.09 ± 1.02 years, a moderate Class II Division 1 occlusion due to a mandibular deficiency, and a mean overbite of -1.1 ± 0.8 mm were treated with a mandibular tongue crib device. Pre- and posttreatment lateral cephalograms were obtained and traced, and various angular and linear variables were measured. These measurements were compared using the paired t test.


RESULTS
The statistical assessment indicated that SNB, facial angle, B-VL, Pog-VL, and interincisal angle increased significantly. IMPA, 1-SN, ANB, and Wits appraisal were significantly decreased (P<.05). The changes of Jarabak Index, SN-MP, SNA, and Y-axis were not significant. In addition, the overjet was reduced.


CONCLUSIONS
During the mixed dentition phase, a tongue crib appliance in the mandible is helpful to impede tongue thrust and stimulate mandibular growth.
Meibodi
Shahin Emami
SE
Department of Orthodontics, Islamic Azad University, Tehran, Iran.
Meybodi
Seyed Amir Reza Fatahi
SA
Meybodi
Elham Morshedi
EM
D002508:Cephalometry / Q000379:methods; D002648:Child; D002680:Chin / Q000473:pathology; D003818:Dentition, Mixed; D005260:Female; D006801:Humans; D007180:Incisor / Q000473:pathology; D008297:Male; D008312:Malocclusion, Angle Class II / Q000628:therapy*; D008334:Mandible / Q000254:growth & development / Q000473:pathology; D008437:Maxilla / Q000473:pathology; D009295:Nasal Bone / Q000473:pathology; D016382:Orthodontic Appliance Design; D009968:Orthodontic Appliances, Removable; D057887:Overbite / Q000628:therapy; D012658:Sella Turcica / Q000473:pathology; D014061:Tongue Habits / Q000628:therapy*