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Biomedical subjects

I Ceylan

Publications and source records attributed to I Ceylan.

13 recordsLinked to original sources
PubMed2001

The effects of overbite on the maxillary and mandibular morphology.

The aim of this study was to investigate the differences in the maxillary and mandibular morphology related to the overbite. A total of 80 untreated subjects were divided into 4 groups with normal overbite, edge-to-edge bite, open bite, or deep bite and were compared with one another. Differences between the overbite groups and between genders were assessed by means of variance analysis and the least significant difference test. In addition, correlation coefficients between the overbite and other variables were calculated. The results showed that there are statistically significant differences in the maxillary and mandibular morphology among the overbite groups.

Adolescent↗
PubMed2000

An investigation of mandibular morphology in subjects with different vertical facial growth patterns.

In the present study, mandibular morphology was investigated on lateral cephalometric head films and dental casts of 60 subjects (30 females and 30 males) who had different vertical facial growth patterns. The sample had a mean age of 13.5 years, with a range of 11 to 15.5 years. The subjects were divided into three groups with regard to vertical facial growth by using the SN/GoGn angle to define low-angle, normal, and high-angle groups. In addition, each group was divided into two subgroups according to sex. The effects of the SN/GoGn angle and gender on mandibular morphology were investigated by means of analysis of variances. Tan Go, IMPA, SL, and EL measurements were found to be related to SN/GoGn, and the measurements of Go-Gn, Symphysis depth, and Intermolar width to be related to sex.

Adolescent↗
PubMed1999

Longitudinal cephalometric changes in the maxilla, mandible and maxillary-mandibular relationship between 10 and 14 years of age.

In the present study, longitudinal growth changes in the maxilla, mandible, and maxillary-mandibular relationship occurring between the ages of 10 and 14 years were evaluated in 19 female and 15 male subjects. All subjects had a clinically-acceptable occlusion, a normal growth pattern, and none had undergone orthodontic treatment. Serial cephalometric radiographs were taken at the ages of 10, 11, 12, and 14 years. The effects of age and sex on the sagittal growth of the jaws were studied by means of variance analysis. The results show that A-Ptm, B-Ptm, Pg-Ptm, A'-Ptm, B'-Ptm, and S-N-Pg measurements were affected by age, and the measurements A-Ptm, A'-Ptm, Wits and ANB by sex. Duncan's multiple range test was applied to those measurements where F values were found to be statistically significant. As a result, it was observed that the greatest growth changes occurred between 12 and 14 years old.

Adolescent↗
PubMed1996

The effect of rapid maxillary expansion on conductive hearing loss.

The effects of rapid maxillary expansion (RME) on conductive hearing loss were investigated in 14 subjects (11 females and 3 males). The subjects ranged in age from 10 years 4 months to 16 years 9 months (mean age 12 years 11 months +/- 1 year 9 months) and had narrow maxillary arches and conductive hearing loss. Hearing levels were determined by means of pure-tone audiometric records. Three records were taken for each subject. The first was taken before RME, the second after sufficient midpalatal suture opening was achieved (mean = 15 days), and the third after the retention period (mean = 4.5 months). All the audiometric records were assessed by an otolaryngologist. Changes in both hearing level and air-bone gap were investigated by means of analysis of variance. It has been determined that hearing improved at a statistically significant level (P < 0.05) after the active treatment period, but that the improvement reversed at the end of the retention period. Five patients experienced significant and stable hearing improvement over the duration of this study.

Adolescent↗
PubMed1995

A study on the pharyngeal size in different skeletal patterns.

In the present study, pharyngeal size was investigated on the lateral cephalometric head films of 90 subjects, 45 males and 45 females, having different ANB angles. All of the subjects were aged 13 to 15 years. The films were taken at natural head position, and all were divided into three groups according to the ANB angle: ANB angles smaller than 1 degree, between 1 degree and 5 degrees, and larger than 5 degrees. In addition, each group was also divided into two subgroups according to sex. The effects of the ANB angle and sex on the pharyngeal size were investigated by means of variance analysis. It has been observed that two measurements, hy-apw4 and oropharynx area measurements, were affected by the change of ANB angle, and two other measurements, t-ppw and hy-apw2 measurements, by the sex; and that hy-apw4 measurement and oropharynx area became smaller with the increase of ANB angle.

Adolescent↗
PubMed1989

[Tracing and measuring errors in the roentgenographic cephalometry].

In the present study, thirty cephalometric films which had been used in three different investigations using almost the same parameters were selected and divided into two groups. Twenty-three parameters in the first group and nine parameters in the second, which were used in two and three investigations respectively, were statistically compared. Paired t test was used in the first group and variance analysis in the second group. In conclusion, a lot of parameters exhibited statistically significant variability, while some of them were not.

Analysis of Variance↗