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    Effects of early bilateral mandibular first molar extraction on condylar and ramal vertical asymmetry
    (Springer Heidelberg, 2013) Halicioglu, Koray; Celikoglu, Mevlut; Caglaroglu, Murat; Buyuk, Suleyman Kutalmis; Akkas, Ismail; Sekerci, Ahmet Ercan
    This study aims to investigate the mandibular vertical asymmetry in a group of adult patients who had early bilateral mandibular first molar extractions. Mandibular asymmetry index measurements (condylar, ramal, and condylar plus ramal) were made on the panoramic radiographs of a study group including 30 subjects (mean age, 18.22 +/- 1.30 years) and a control group of 25 subjects (mean age, 18.24 +/- 1.17 years). Group I comprised the control group patients with no extractions and had excellent class I relationships, no missing teeth, and slight or moderate anterior crowding. Group II included patients with a bilateral mandibular first molar teeth extracted before the age of 12 years. Student's t test was used for the comparison of asymmetry index values between the groups. A paired t test was used to determine possible statistically significant differences between the sides for condylar, ramal, and condylar plus ramal height measurements. No group showed statistically significant side-specific differences for posterior vertical height measurements. Condylar asymmetry index (CAI), ramal asymmetry index, and condylar plus ramal asymmetry index measurements were not statistically different between the groups (p > 0.05). CAI values were significantly high when compared with the 3 % threshold value in the both groups, but comparisons between the groups were not statistically significant. This article investigates the effects of early bilateral mandibular molar teeth extraction that has never been investigated in the literature. The present study showed that the lengths of the condylar, ramal, and condylar plus ramal height were less in the study group than in a well-matched control group of without extraction.
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    Effects of impacted maxillary canines on root resorption of lateral incisors
    (Urban & Vogel, 2017) Ucar, Faruk I.; Celebi, Ahmet A.; Tan, Enes; Topcuoglu, Tolga; Sekerci, Ahmet Ercan
    The aim of this study was to analyze the amount of root resorption of maxillary lateral incisors by relating the position, location, and angulation of the impacted canine using cone-beam computed tomography (CBCT). The study sample consisted of panoramic and CBCT radiographs of 46 patients with a unilateral impacted canine (16 males and 30 females; mean age: 19.53 +/- 6.66 and 19.44 +/- 5.77 years, respectively). Sector location and canine angulation were measured in panoramics. All tomographs were obtained using CBCT (NewTom 5G, QR, Verona, Italy) and three-dimensional (3D) reconstructions of the maxillary laterals assessed by Mimics 14.01 image analysis software. Upper lateral incisor volume was smaller on the impacted side (401.95 +/- 83.69 mm(3)) than on the nonimpacted side (433.54 +/- 92.6 mm(3), P < 0.05). There were no significant differences of lateral root resorption volume when comparing the impacted canines being on the labial or palatal sides (P > 0.05), but impacted canine angulation was significantly steeper on the labial side (70.85A degrees) than on the palatal side (46.09A degrees, P < 0.05). The volume of root resorption of laterals when comparing the various positions of the canine in different sectors or canine angulation in 30(o) intervals was not statistically significantly different (P > 0.05). The impacted canines caused root resorption of lateral incisors. The angulation of the canine was steeper on the labial side than on the palatal side but root resorption of adjacent laterals was not different. There were no statistically significant differences in the amount of root resorption of the laterals when the canine was evaluated according to localization and angulation.