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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.
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    Longitudinal Skeletal Changes in a Turkish Anatolian Population
    (Aves Press Ltd, 2009) Hamamci, Nihal; Gunduz Arslan, Seher; Sahin, Semra
    The goal of this study was to detect the growth changes in the maxilla and mandible of Turkish Anatolian subjects by using frequently analyzed measurements in orthodontic diagnosis. 30 subjects (15 males and 75 females) with Angle class 1 occlusal relationship, and normal anteroposterior (ANB, 2-4 degrees) and vertical (SN-GoGn, 32 5 degrees) skeletal relationships selected from the university archive were included in this study. Lateral cephalometric radiographs of subjects taken at T-1 (mean age 8.8 years), T-2 (mean age 13.8 years) and T3 (mean age 17.8 year) periods were investigated with gender difference and also research was carried out without gender difference at the same time periods. A total of fifteen measurements were analyzed longitudinally. As a result of our study, all values except ANB angle in girls and except Y-axis angle in boys showed statistically significant changes. Between boys and girls, significant differences were found in Y-axis angle in the period of T-1; in Y-axis angle, AN5-PNS,. ANSPN5-P measurements in the period of T2, and in ANB angle, ANSPNS, ANSPNS-P, Co-A and Co-Gn measurements in the period of T3. Similar results were found in other measurements except these between boys and girls. In conclusion, boys and girls showed similar findings in angular measurements, but only Y-axis angle was statistically greater in girls than in boys in the periods of T-1 and T-2. This showed an early vertical mandibular growth in girls than in boys. In linear measurements, boys generally showed greater results than girls.