The condylar asymmetry measurements in different skeletal patterns

Abstract

In the present study, condylar asymmetry measurements were investigated on the lateral cephalometric head radiographs and the panoramic radiographs of 72 subjects (36 males and 36 females), aged 12-16-years and having different skeletal patterns. The lateral cephalometric head radiographs were divided into three groups according to the ANB angle: ANB angles smaller than 1 degrees, between 1 degrees and 5 degrees, and larger than 5 degrees. In addition, each group was also divided into two subgroups according to sex. The effects on the ANB angle and sex on the condylar asymmetry measurement were investigated on the panoramic radiographs by means of variance analysis. It was observed that while condylar + ramus ratio measurement was affected by the change of ANB angle, the other measurements were not affected by it.

Mandibular Asymmetry in Class II Subdivision Malocclusion

“…9,15 In this study, no gender related statistically significant differences were found between compared sides and investigated groups. These findings support the studies of Habets et al, 9 Kiki et al 17 and Sezgin et al 18 that used the same method described in the present study.…”

“…[9][10][11][12][13][14][15][16][17][18] Bilateral views of the mandible can be obtained with OPG, and vertical measurements can be achieved. 20 The use of panoramic radiographs to evaluate side-to-side differences is questionable, but a number of studies have been made that supported the use of the panoramic technique.…”

“…This method has been used to calculate the condylar and ramal heights for comparing the right and left sides of the mandible for asymmetries in temporomandibular disorder (TMD) patients, Class I, Class II, and Class III malocclusions, bilateral posterior crossbites, and different skeletal patterns. [9][10][11][12][13][14][15][16][17][18] A review of the literature revealed no studies that measured the condylar and ramal asymmetry of Class II subdivision patients and compared it with that of normal subjects using the method described by Habets et al 9 Therefore, the objectives of this study were to determine the condylar and ramal mandibular asymmetry in a group of patients with Class II subdivision malocclusion and compare these data with similar measurements from a sample with normal occlusion. The intent is to identify possible gender differences between male and female subjects.…”

Sınıf II subdivizyon maloklüzyonda mandibular asimetrinin değerlendirmesi

“…The reliability of this formula has been shown in many studies (Habets et al 1988, Saglam 2003, Kiki et al 2007, Kilic et al 2008. The formula and method to assess the condylar and ramal asymmetry described by Habets et al (1988) has also been used in many studies.…”

“…It has also been used for the assessment of side-to-side dimensional differences and to define the asymmetries (Habets et al 1987, Miller et al 1996, Miller et al 1997, Saglam 2003, Kiki et al 2007, Sezgin et al 2007, Kurt et al 2008. The use of OPG for specific measurements and the determination of differences is controversial owing to considerations relating to magnification and distortion.…”