Objective: To test the null hypothesis that there is no difference between the effects of fan-type rapid (FRME) and rapid maxillary expansion (RME) used with an acrylic bonded expansion appliance on dentofacial structures in early occlusal stages. Materials and Methods: This was a prospective clinical trial. The FRME group had an anterior constricted maxillary width with a normal intermolar width, and the RME group had bilateral constricted maxillary width. The FRME group consisted of 20 patients (mean age, 8.96 6 1.19 years), and the RME group consisted of 22 patients (mean age, 8.69 6 0.66 years). Lateral and frontal cephalometric radiographs and dental casts were taken before and after expansion and 3 months after completing treatment for each patient. The data were compared using repeated-measures analysis of variance. The paired-samples t-test was used to evaluate treatment and retention effects, and the independent samples t-test was used to consider the differences between the two groups. Results: The maxilla moved downward and forward in both groups. The nasal cavity and maxillary width were expanded more in the RME group, and there were only a few relapses in this group during the retention period. There was significant labial tipping of the upper incisors in the FRME expansion group. The expansion of intercanine width was similar in both groups, but the expansion of intermolar width was significantly greater in the RME group. Conclusion: The null hypothesis was rejected. There was a difference between the effects of FRME and RME used with an acrylic bonded expansion appliance on dentofacial structures in the early occlusal stages. (Angle Orthod. 2013;83:842-850.)
The objective of the study was to compare the craniofacial characteristics of children with operated unilateral complete cleft lip and palate (UCLP) with those of noncleft children. Lateral and posteroanterior cephalometric radiographs of subjects with UCLP and controls who were matched for sex, age, and ethnic origin were analyzed and compared. There were a total of 21 subjects with UCLP (10 boys and 11 girls) from the Orthodontic Department of Selcuk University and 15 controls (7 boys and 8 girls) from the Orthodontic Department of Ankara University. The nasal bone length in the group with cleft did not differ significantly from that in the control group. Subjects with UCLP included in the study appeared to have shorter faces, smaller mandibulae, greater lateral orbital width, and smaller sella turcicae compared with controls. Unilateral cleft lip and palate affects the intracranial morphology as well as dentofacial structures.
The purpose of this report is to present Apert syndrome patient by highlighting craniofacial characteristics and orthodontic approach to treatment.The patient, a 16-day-old female and the second child of healthy parents, was admitted to our department with primary complaint of cleft palate. She had a cone-shaped calvarium, midface hypoplasia, syndactyly of the hands and feet, hypertelorism, proptosis and cleft palate. After taking maxillary impression, an acrylic appliance was applied to orientate the growing and enable the feeding.A case with Apert syndrome undergoes the orthodontic treatment for a long time and also a multidisciplinary approach is essential to determine the best collaborative corrective plan for the deficiencies of the patient.
The purpose of this study was to evaluate the effects of a modified reverse headgear force applied with a facebow on the dentofacial structures of patients with skeletal Class III malocclusions characterized by maxillary retrognathism. Thirty individuals before the pubertal peak and in the mixed dentition were selected. Fifteen subjects (seven males, eight females, mean age 9.2 years) who formed the treatment group were compared with a control group comprising seven males and eight females (mean age 8.6 years). Maxillary deficiency and negative overjet were noted in all individuals included in the treatment and control groups. The combination of a full coverage maxillary removable appliance and an embedded facebow was used for treatment. The outer arms of the facebow were bent to deliver the force through the approximate centre of resistance of the maxilla. Extra-oral elastics extended from the reverse headgear to the outer arms of the facebow. Statistical analysis indicated significant changes in angles SNA, NV-A, SV-ANS, SV-PNS and PP measurements, suggesting that the maxilla moved anteriorly. There was, however, no statistically significant difference in SN-MP, SN-PP and MP-PP measurements between the treatment and control groups. These results suggest that there was no maxillary or mandibular rotation, but that the molars moved mesially in the protraction group. The U6-PP(V) dimension did not display significant differences between the pre- and post-treatment measurements in the treated group. Anterior movement of the maxilla was obtained without rotation of the jaws and upper and lower maxillary heights were unaffected.
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