ABSTRACT
OBJECTIVES: To evaluate dento-skeletal effects of the Pendulum Hygienic Distalizer (P.H.D), utilized on expansion of the maxillary arch and distalizing of maxillary first molars. MATERIAL AND METHODS: Ten patients were selected from the outpatient clinic of Department of Orthodontics, Faculty of Dentistry, Mansoura University having: (1) Skeletal Class I with moderate maxillary crowding; (2) Angle Class II molars relation; (3) Constricted maxillary arch (posterior crossbite); (4) Ages ranged from 11 to 14 years with an average age of 12 years and 2 months. The changes that, brought by the appliance were evaluated from the lateral cephalometric, postero-anterior radiographs and study cast model taken before and after appliance application by means of a paired t-test. RESULTS: Significant amounts of maxillary expansion, molar distalization, molar distal tipping and anchorage loss were observed. The amount of maxillary expansion was 4.35 ± 072 mm. The mean maxillary first molar distal movement was 2.27 ± 0.52 mm with a distal tipping of 1.71 ± 0.74 degrees in 3.19 ± 0.53 months. The rate ofdistal movement was 0.70 mm per month. Reciprocal mesial movement of the first premolars was 1.73 ± 0.92 mm with a mesial tipping of 2.60 ± 1.02 degrees. Maxillary incisors moved 1.80 ± 0.85 mm and tipped 2.02 ± 1.43 degrees mesially. CONCLUSIONS: It was concluded that the Pendulum Hygienic Distalizer works well with the treatment philosophy of Class II malocclusion with posterior cross-bite by expansion the maxillary arch and distalizing of maxillary molars.
Subject(s)
Cephalometry/methods , Orthodontic Appliance Design , Palatal Expansion Technique/instrumentation , Adolescent , Bicuspid/pathology , Child , Follow-Up Studies , Humans , Incisor/pathology , Malocclusion, Angle Class I/therapy , Malocclusion, Angle Class II/therapy , Maxilla/pathology , Models, Dental , Molar/pathology , Nasal Bone/pathology , Sella Turcica/pathology , Vertical DimensionABSTRACT
Angle Class II division 1 malocclusion has been one of the most encountered problems in the orthodontic practice. In growing patients, mandibular repositioning appliances are the method of choice to induce mandibular growth and are termed functional appliances. This study was carried out to investigate the possible effect of the Sabbagh Universal Spring2 (SUS2) on the dental and skeletal cephalometric measurements in the permanent dentition of ten growing patients with Class II division 1 malocclusion and to compare its effect with the similar available data of similar fixed functional appliances. It was concluded that the Sabbagh Universal Spring2 appliance works well with the treatment philosophy of Class II division 1 malocclusion with retruded mandible by advancing the mandible anteriorly.
