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    Comparison of facial proportions and anthropometric norms among turkish young adults with different face types
    (Springer, 2008) Arslan, Seher Guenduez; Genc, Celal; Odabas, Bahadir; Kama, Jalen Devecioglu
    Background This study aimed to determine the prevalence of three different face types among Turkish young adults based on facial indices, to assess and compare the vertical and horizontal dimensions for each type, and to establish anthropometric norms for Turkish adults. Methods A total of 173 healthy young adults (83 females and 90 males) 17 to 25 years of age were examined. Using anthropometric landmarks, 8 horizontal and 10 vertical direct measurements were made with a millimetric compass. Results Using facial indices, 59 of the 173 subjects were classified as euryprosopic, 49 as mesoprosopic, and 65 as leptoproposic. In the total evaluation of both groups, all the parameters were higher in the males except forehead heights 1 and 2. A comparison of face types in females and males separately showed no significant differences between the parameters. Conclusions The data presented in this study may help plastic surgeons and orthodontists objectively determine the relationships between facial structures for different face types. Additionally, the facial anthropometric norms derived from this study may be useful in the treatment of Turkish patients.
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    Effects of estrogen deficiency on tooth movement after force application: an experimental study in ovariectomized rats
    (Taylor & Francis As, 2007) Arslan, Seher Guenduez; Arslan, Hueseyin; Ketani, Aydin; Hamamci, Orhan
    Objective. The aim of this study was to investigate the effects of estrogen deficiency on tooth movement in ovariectomized rats. Material and methods. Forty-two adult female Sprague-Dawley rats were assigned at random to one of the following groups: test group (n=20), ovariectomized rats (or estrogen-deficient rats); control group (n=22), non-ovariectomized rats. Two months after ovariectomy, expansion springs exerting 10 g of force were inserted between the upper central incisors in both groups. The amount of movement was measured daily until tooth movement began and then at intervals of 3 days. The rats were sacrificed 18 days after applying the expansion spring and histomorphometric analysis was performed along the left upper central incisor root towards the apex of the alveolar bone. Results. The amount and speed of movement was observed to be greater in ovariectomized rats. On histomorphometric analysis, osteoblast and osteocyte counts on the pressure side were higher in the non-ovariectomized group than in the ovariectomized group (p < 0.001). In contrast, the osteoclast count was significantly higher (p < 0.01) in the ovariectomized group than in the non-ovariectomized group. The osteoblast and osteocyte counts were significantly higher (p < 0.001) on tension side in the non-ovariectomized group than in the ovariectomized group. Conclusion. Estrogen deficiency increased orthodontic tooth movements but counts of osteoblasts, which are responsible for new bone formation, were lower in regions of tension and of pressure.
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    Longitudinal changes in dental arches from mixed to permanent dentition in a Turkish population
    (Mosby-Elsevier, 2007) Arslan, Seher Guenduez; Kama, Jalan Devecioglu; Sahin, Semra; Hamamci, Orhan
    Orthodontists can benefit from understanding occlusal changes during every stage of human development. The growth and development period is influenced by environmental factors, nutrition, and ethnic variations; systemic health and individual variations can also occur. Our aim in this study was to investigate the longitudinal changes in dental arch dimensions during the transition from mixed dentition (T1) to permanent dentition (T2) in children living in Turkey. Methods: Sixty-five patients ( 36 girls, 29 boys) with complete records from the mixed dentition to the early permanent dentition stages were included in this study ( total, 130 dental casts). All casts ( T1 and T2) had been prepared in centric relation by wax bites, and 14 parameters were measured on these casts. Results: The initial parameters in this Turkish population showed sexual dimorphism; however, during the observation period (T2-T1), there was no sexual dimorphism in arch dimension changes. There were significant changes in arch width parameters ( especially in girls), overjet, and overbite in Turkish children between the midmixed and the permanent dentitions. Conclusions: These results should be useful in planning orthodontic treatment for patients in the mixed and early permanent dentition.
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    Longitudinal profile changes in an Anatolian Turkish population
    (Oxford Univ Press, 2010) Hamamci, Nihal; Arslan, Seher Guenduez; Sahin, Semra
    A total of 30 subjects (15 females and 15 males) with an Angle Class I occlusal relationship and normal antero-posterior (ANB, 2-4 degrees) skeletal relationships were selected from the archive of Dicle University. All subjects were of Anatolian Turkish heritage, and none had any apparent facial disharmony or had undergone orthodontic therapy. Lateral cephalometric radiographs taken at T1 (mean age 8.8 years), T2 (mean age 13.8 years), and T3 (mean age 17.8 years) were separately investigated. Non-gender-specific research was also carried out at the same time periods. In total, 24 measurements were analysed longitudinally. Differences between the genders were determined using independent t-tests. Repeated measures analysis of variance tests were used to evaluate repeated measurements, and paired sample t-tests to compare inside effects between the genders. Significant increases (P < 0.05) were found with age for both females and males. Generally, the increases were greater in males than in females. Nasal prominence increased more than chin prominence, resulting in a tendency to have convex profiles.