Dentofacial effects after the use of bone anchorage pendulum appliance | ||
| Egyptian Orthodontic Journal | ||
| Article 4, Volume 38, December 2010, December 2010, Pages 45-77 PDF (603.96 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/eos.2010.79018 | ||
| Authors | ||
| Safaa M Gahalla* ; Eman M El Shorbagy; Safaa A Ghobashy; Mohamed Ellithy | ||
| Orthodontic Department, Faculty of Dentistry, Tanta University, Tanta, Egypt | ||
| Abstract | ||
| This study was conducted to evaluate the dentofacial changes after distalization of maxillary first molars using the bone anchorage pendulum appliance (BAPA) and the conventional pendulum appliance (PA) in the treatment of dental Class II. Thirty patients were selected from the clinic of Orthodontic Department, Faculty of Dentistry, Tanta University, seeking orthodontic treatment. Their ages were ranged from 13-16 years for both sexes. The patients were divided into two equal groups. The first group consisted of 15 patients treated with Hilgers pendulum appliances (PA). The second group consisted of 15 patients were treated with bone anchorage pendulum appliances (BAPA). The skeletal and dental changes were measured on lateral cephalometric x-ray films and dental casts obtained before and after the distalization. T- test was used for statistical evaluation. In both groups all first maxillary molars were moved distally into a super class I relationship successfully in 6.49 months for BAPA group and 5.65 months for PA group, The average amounts of molar distal movement and tipping were (5.12 mm, 7.6°) in the BAPA group and (6.19 mm, 8.8°) in the PA group. The result showed that, the molar tipped 1.48° per millimeter of distal tooth movement in BAPA group, and 1.42° per millimeter in PA group. The maxillary second premolars, first premolars and central incisors in BAPA group exhibited significant distal movement which would positively affect the prognosis in contrast there was a significant mesial tipping of the maxillary first premolars and central incisors in PA group. Regarding anterior anchorage, there was a reciprocal anchorage loss in the form of maxillary incisors protrusion in PA group; however BAPA group showed no anchorage loss. Lower anterior and total anterior Facial heights increased significantly during the treatment in the two groups. The maxillary intermolar widths were significantly increased in both groups. The maxillary arch perimeter was increased in both groups, which was more pronounced in PA group indicating anchorage loss. The results showed that the BAPA appliance is an effective and minimally invasive, compliance free alternative for intraoral molar distalization without anchorage loss. | ||
| Keywords | ||
| skeletal anchorage; pendulum; Cass II; anchorage; cephalometric | ||
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