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    Dehiscence and fenestration in patients with different vertical growth patterns assessed with cone-beam computed tomography
    (E H Angle Education Research Foundation, Inc, 2012) Enhos, Sukru; Uysal, Tancan; Yagci, Ahmet; Veli, Ilknur; Ucar, Faruk Izzet; Ozer, Torun
    Objective: To test the null hypothesis that the presence of alveolar defects (dehiscence and fenestration) was not different among patients with different vertical growth patterns. Materials and Methods: A total of 1872 teeth in 26 hyper-divergent (mean age: 24.4 +/- 4.8 years), 27 hypo-divergent (mean age: 25.1 +/- 4.5 years), and 25 normo-divergent (mean age: 23.6 +/- 4.1 years) patients with no previous orthodontic treatment were evaluated using cone-beam computed tomography. Axial and cross-sectional views were evaluated with regard to whether dehiscence and/or fenestration on buccal and lingual surfaces existed or not. For statistical analysis, the Pearson chi-square test was used at a P < .05 significance level. Results: According to the statistical analysis, the hypo-divergent group (6.56%) had lower dehiscence prevalence than the hyper-divergent (8.35%) and normo-divergent (8.18%) groups (P = .004). Higher prevalences of dehiscence and fenestration were found on buccal sides in all vertical growth patterns. While fenestration was a common finding for the maxillary alveolar region, dehiscence was a common finding in the mandible in all groups. Conclusion: The null hypothesis was rejected. Although the prevalence of fenestrations was not different, significant differences for dehiscences were found in patients with different vertical growth patterns. (Angle Orthod. 2012;82:868-874.)
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    Dehiscence and fenestration in skeletal Class I, II, and III malocclusions assessed with cone-beam computed tomography
    (E H Angle Education Research Foundation, Inc, 2012) Yagci, Ahmet; Veli, Ilknur; Uysal, Tancan; Ucar, Faruk Izzet; Ozer, Torun; Enhos, Sukru
    Objective: To test the null hypothesis that the presence of dehiscence and fenestration was not different among patients with skeletal Class I, II, and III malocclusions. Materials and Methods: In this retrospective study, a total of 123 cone-beam computed tomography (CBCT) images were obtained with an iCAT scanner (Imaging Sciences International, Hatfield, Pa). Patients with normal vertical patterns were classified according to dental malocclusion and ANB angle. Class I comprised 41 patients-21 girls and 20 boys (mean age, 22.4 +/- 4.5 years); Class II comprised 42 patients-22 girls and 20 boys (mean age, 21.5 +/- 4.2 years); and Class III comprised 40 subjects-22 girls and 18 boys (mean age, 22.1 +/- 4.5 years). A total of 3444 teeth were evaluated. Analysis of variance and Tukey's test were used for statistical comparisons at the P <.05 level. Results: Statistical analysis indicated that the Class II group had a greater prevalence of fenestration than the other groups (P <.001). No difference was found in the prevalence of dehiscence among the three groups. Although fenestration had greater prevalence in the maxilla, more dehiscence was found in the mandible for all groups. In Class I, alveolar defects (dehiscence, fenestration) were matched relatively in both jaws. Furthermore, Class II and Class III subjects had more alveolar defects (41.11% and 45.02%, respectively) in the mandible. Dehiscences were seen with greater frequency in the mandibular incisors of all groups. Conclusion: The null hypothesis was rejected. Significant differences in the presence of fenestration were found among subjects with skeletal Class I, Class II, and Class III malocclusions. Fenestrations had greater prevalence in the maxilla, but more dehiscences were found in the mandible. (Angle Orthod. 2012;82:67-74.)