Publications (12)9.12 Total impact
-
Article: Effects of force magnitude on relapse: An experimental study in rabbits.
[show abstract] [hide abstract]
ABSTRACT: The aims of this study were to investigate the effects of 2 force levels on the amount of relapse and to determine whether there is a relationship between the rates of tooth movement and relapse. Approximately 20-g (group I) and 60-g (group II) forces were applied to the maxillary central incisors of 25 young adult (14 weeks of age) New Zealand female rabbits. Active tooth movement lasted 20 days. Then, the appliances were removed, and the incisors were released. The distance between the incisors was measured daily from the midlevels of the crowns by using a digital caliper during the active phase of tooth movement for 20 days, and then relapse was measured at the same level for 37 days. Analysis of variance and the Bonferroni multiple range test were used for statistical analyses. After active tooth movement, the mean total opening amounts were 3.98 ± 0.59 mm in group I and 4.82 ± 0.82 mm in group II, and the mean difference was approximately 0.8 mm. A rapid relapse was observed on the initial days in both groups, and its rate decreased with time. Significant relapse was observed in the first 5 and 8 days of the experiment in 20-g and 60-g force groups, respectively. The relapse in group II was significantly greater than in group I only on the first day of experiment. Statistically significant correlations were found between total tooth movement and relapse (R = 0.896, P <0.001). These results showed a close relationship between the amount of relapse and orthodontic force magnitude. Greater relapse occurred during the initial days after appliance removal, and this indicates that retention appliances are needed immediately after the removal of orthodontic appliances.American journal of orthodontics and dentofacial orthopedics: official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics 07/2011; 140(1):44-50. · 1.33 Impact Factor -
Article: Effects of the functional regulator III on transversal changes: a postero-anterior cephalometric and model study.
[show abstract] [hide abstract]
ABSTRACT: Studies assessing the transversal treatment changes caused by the functional regulator III (FR-3) are limited in number. This clinical study was planned to analyse the transversal effects of the FR-3 appliance therapy. The treatment group consisted of 17 patients (8 males and 9 females) with Class III malocclusion, who were treated with the FR-3 appliance. The control group consisted of 17 subjects (7 males and 10 females) with a normal occlusion. Mean ages of the subjects were 10.73 and 10.66 years in the treatment and control groups, respectively. Postero-anterior radiographs and stone casts were obtained before (T1) and after (T2) treatment/observation. The results of the Student's t-test comparing initial values showed that maxillary dentoalveolar and skeletal widths are significantly larger in the control group than those in the treatment group. At the end of the treatment, significant transverse increments occurred only at the dentoalveolar level of the maxilla. The transversal changes in the mandible were not statistically significant. Buccal shields of FR-3 did not stimulate the growth of maxillary apical base but caused an enhanced and supplementary widening of maxillary dental and alveolar structures.The European Journal of Orthodontics 11/2010; 33(6):727-31. · 0.89 Impact Factor -
Article: Effects of rapid-slow maxillary expansion on the dentofacial structures.
[show abstract] [hide abstract]
ABSTRACT: To date, no study has determined if rapid followed by slow maxillary expansion (also termed 'semi-rapid' expansion) has the same effects on the dentofacial skeleton as rapid maxillary expansion. To determine the vertical and sagittal changes in the facial skeleton during and following rapid then slow maxillary expansion (R-SME). Bonded maxillary expansion appliances were used to separate the maxillae over six days by activating the midline screws twice a day. The screws were then activated three times a week until sufficient expansion was obtained (Mean: 3.4 months) and used as retainers for six months. Cephalometric measurements at the start of expansion (T1), end of expansion (T2) and end of retention (T3) were compared with paired t-tests. Pearson correlation coefficients were used to determine the associations between the expansion (dental and skeletal) and the cephalometric changes. The maxillae moved forward a small, but statistically significant, extent during expansion. The upper molars were extruded and the mandible 'rotated' downward and backward. Although the vertical height of the facial skeleton (SN/GoMe, S-Go, N-Me, ANS-Me) increased significantly during expansion, the changes were small and highly variable. Some dimensions (SN/GoMe) relapsed during retention, while others (S-Go, N-Me) increased. Rapid then slow maxillary expansion caused a small, but statistically significant, forward movement of the upper facial skeleton, a small downward and backward rotation of the mandible and a small increase in face height. The changes were similar to those found during rapid maxillary expansion.Australian orthodontic journal 11/2010; 26(2):178-83. · 0.25 Impact Factor -
Article: Soft tissue profile changes following maxillary protraction in Class III subjects.
[show abstract] [hide abstract]
ABSTRACT: SUMMARY: The dentoskeletal effects of maxillary protraction (MP) therapy have been extensively investigated, while those relating to soft tissue profile changes are limited. Thus, the aim of this study was to determine the degree of soft tissue profile changes following MP therapy. The material consisted of the cephalometric films of 24 female subjects (12.69 +/- 1.08 years) with a Class III malocclusion who underwent MP therapy; these were compared with a control group of 15 females (12.13 +/- 0.63 years) with a Class I occlusion and matched for chronological age and observation period. Cephalometric films were available for all subjects before (T1) and after (T2) treatment/observation. The initial measurements and treatment/control changes were compared between the groups by means of a Student's t-test. The subjects in the MP group had a concave facial profile when compared with the controls. Comparison of the changes induced by MP therapy showed that the maxilla and surrounding soft tissues showed significant anterior movement (P < 0.001), whereas the mandible and surrounding soft tissues showed a backward and downward rotation. The improvement in facial profile predominantly resulted from maxillary soft tissue changes and mandibular hard tissue changes. The concave soft tissue profiles of the Class III subjects were corrected by anterior movement of the maxilla and a concomitant increase in the fullness of the upper lip. The concave skeletal profiles were, however, corrected mainly by backward and downward rotation of the mandible.The European Journal of Orthodontics 08/2010; 32(4):419-24. · 0.89 Impact Factor -
Article: Associations between upper lip activity and incisor position.
[show abstract] [hide abstract]
ABSTRACT: Muscle activity in the upper lip may influence the positions of the upper and lower incisors. To determine the associations between muscle activity in the upper lip and the inclinations of the incisors, overjet and overbite. Forty-five subjects (29 girls, 16 boys), between 11 and 15 years of age with predominantly Class I malocclusion, were used. The inclinations of the incisors, overjet and overbite were measured on lateral cephalometric radiographs. Bipolar electrodes were placed on the upper lip to record the activity in orbicularis oris muscle at rest, during maximal clenching, chewing hazelnuts and swallowing. Correlation coefficients between the cephalometric variables and the electromyographic (EMG) activity in the upper lip were calculated. There was no gender difference in the EMG activity in the upper lip. There were no statistically significant associations between the EMG activities in the upper lip and the inclinations of the incisors, overjet and overbite. The positions of the incisors do not appear to be influenced by muscle activity in the upper lip.Australian orthodontic journal 05/2010; 26(1):56-60. · 0.25 Impact Factor -
Article: Effects of the functional regulator III on profile changes in subjects with maxillary deficiency.
[show abstract] [hide abstract]
ABSTRACT: The aim of this study was to determine the hard and soft tissue profile changes in Class III malocclusion subjects following functional regulator III (FR-3) treatment. The material comprised the cephalometric films of 15 patients (11 males and four females; mean ages 10.22 and 10.44 years, respectively) with a Class III malocclusion and a concave profile treated with the FR-3, and a control group of 15 subjects (11 males and four females; mean ages 10.39 and 10.27 years, respectively) with a Class I malocclusion matched for chronological age and observation period with the study group. Fourteen linear and seven angular measurements were measured on the cephalometric films taken before (T1) and after (T2) treatment/observation. The results of the Student's t-test showed that the treatment group had a concave facial profile when compared with the controls. At the end of treatment, the maxilla and surrounding soft tissues showed significant anterior movement (P < 0.001 and P < 0.01, respectively), whereas mandibular growth was restricted. The vertical dimensions increased, the upper incisors proclined, and the lower incisors retroclined significantly (P < 0.001). The FR-3 appliance produced significant improvements in the hard and soft tissues of Class III subjects with a concave profile.The European Journal of Orthodontics 05/2010; 32(6):729-34. · 0.89 Impact Factor -
Article: McNamara norms for Turkish adolescents with balanced faces and normal occlusion.
[show abstract] [hide abstract]
ABSTRACT: There are no norms for the McNamara analysis for Turkish adolescents. To obtain cephalometric standards for the McNamara analysis for Turkish adolescents with balanced faces and Class I occlusions, and to compare the standards with published data. The cephalometric radiographs of 116 children (83 female, 33 male) between 11 and 16 years of age with Turkish grandparents and Class I occlusion, well-aligned upper and lower dental arches, no anterior and/or posterior crossbites and normal dentofacial structures were used. The eight linear and two angular measurements in the McNamara analysis were measured on images of the scanned radiographs. Measurements of the male and female subjects were compared with each other and with published norms for North American adolescents and adults. The Co-Gn, Co-A, ANS-Me and Ui-A were larger in the male subjects. Comparisons between the present study and McNamara's original study revealed that Anatolian Turkish adolescents, particularly girls, have smaller midfacial and mandibular lengths and longer and more retrusive faces than North American adolescents and adults. The small, but statistically significant, gender differences in mandibular and midfacial lengths and lower anterior face height may not be clinically significant. A single set of Turkish norms for the McNamara analysis may be appropriate.Australian orthodontic journal 05/2010; 26(1):33-7. · 0.25 Impact Factor -
Article: Changes in soft tissue profile and electromyographic activity after activator treatment.
[show abstract] [hide abstract]
ABSTRACT: To date, few studies have correlated the changes in muscle activity and specific soft tissue variables in adolescents with malocclusions. To determine associations between the soft tissue profile and electromyographic activities in temporalis, masseter and orbicularis oris muscles in children with Class II division 1 malocclusions treated with activators. For this prospective study, 25 subjects with Class II division 1 malocclusions were randomly assigned to either a Treatment group (N=15) or a Control group (N=10). The mean skeletal ages of the subjects in the Treatment and Control groups were 11.3 +/- 1.1 and 11.0 +/- 1.3 years, respectively. The subjects in the Treatment group were treated with activators and the subjects in the Control group were untreated. Lateral cephalometric radiographs and EMG recordings of the anterior temporalis and masseter muscles during clenching, chewing and swallowing and the orbicularis oris muscle during whistling were obtained at the start of the study and 12 months later. Changes in the soft tissue profile were correlated with changes in the EMG activities in anterior temporalis, superficial masseter and orbicularis oris muscles. The upper lip to E line distance (UL-E) decreased more in the Treatment group than the Control group (p < 0.05) and the H angle decreased in the Treatment group, but increased in the Control group (p < 0.01). The EMG activities of temporalis and masseter muscles increased significantly in both groups. All between-group EMG differences were statistically significant with the exception of the activities in the temporalis and masseter muscles during swallowing. In the Treatment group, a significant positive correlation (r = .57) was found between the changes in UL-E and anterior temporalis activity during swallowing, and significant negative correlations were observed between the EMG activity of masseter muscle during swallowing and changes in LL-E (r = -.54), OLp-UL (r = -.55) and OLp-LL (r = -.67). Activator therapy is accompanied by changes in the lips and temporalis and masseter activities during swallowing.Australian orthodontic journal 11/2009; 25(2):116-22. · 0.25 Impact Factor -
Article: Facial asymmetry in subjects with class III malocclusion.
[show abstract] [hide abstract]
ABSTRACT: Facial skeletal asymmetries in Class III subjects seeking orthognathic surgery may complicate subsequent treatment. The purpose of this study was to investigate facial asymmetry in orthognathic surgery patients with Class III malocclusion. The Class III group consisted of 29 orthognathic surgery patients 114 female, 15 male; Mean age: 21.44 years) with Class III malocclusions. The Control group consisted of 32 subjects (16 female, 16 male; Mean age: 19.20 years) with excellent Class I occlusal relationships. Facial skeletal asymmetry, based on the skeletal midline, was measured on posteroanterior radiographs. In the Class III group, the chin point deviated to the ipsilateral side. The side-to-side and between group differences were compared. In the Class III group, the antegonial notch--skeletal midline distance was significantly larger (p < 0.05) and menton-antegonial notch distance was significantly different (p < 0.05). There were no statistically significant differences between the right and left side measurements in the Control group. Between-group comparisons showed that subjects in the Class III group had greater skeletal asymmetries in lower face. In 78 per cent of the subjects in the Class III group the chin point was displaced more than 2 mm to one side. Subjects with Class III malocclusion may have facial skeletal asymmetries, predominantly in the lower face. Frontal asymmetries should be considered during diagnosis and treatment planning.Australian orthodontic journal 11/2009; 25(2):158-62. · 0.25 Impact Factor -
Article: Effects of early unilateral first molar extraction on skeletal asymmetry.
[show abstract] [hide abstract]
ABSTRACT: The purpose of this study was to investigate dental and skeletal asymmetry in patients who had unilateral first molar extractions. Two study groups were formed according to the location of the extracted first molars. Group I included 25 subjects who had a maxillary permanent first molar extracted (mean age, 18.25 years). Group II included 26 subjects who had a mandibular permanent first molar extracted (mean age, 17.75 years). The control group included 30 subjects with no missing teeth and normal occlusion (mean age, 18.50 years). Dental and skeletal asymmetry values were computed on posteroanterior radiographs for all subjects. Data were analyzed statistically with paired t tests to determine intragroup differences and with ANOVA and Scheffé tests to determine intergroup differences. Unilateral first molar extractions caused dental midline deviations in both arches, but this was more prominent in the mandibular arch. Unilateral first molar extraction during growth and development can result in remarkable skeletal asymmetry, especially in the lower third of face. Patients who had early unilateral first molar extraction can have skeletal and dental asymmetries.American journal of orthodontics and dentofacial orthopedics: official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics 09/2008; 134(2):270-5. · 1.33 Impact Factor -
Article: Effects of rapid maxillary expansion on conductive hearing loss.
[show abstract] [hide abstract]
ABSTRACT: To test the null hypothesis that rapid maxillary expansion (RME) with a rigid bonded appliance has no effect on conductive hearing loss (CHL) in growing children. Fifteen growing subjects (mean age 13.43 +/- 0.86 years) who had narrow maxillary arches and CHL participated in this study. Three pure-tone audiometric and tympanometric records were taken from each subject. The first records were taken before RME (T1), the second after maxillary expansion (T2) (mean = 0.83 months), and the third after retention (mean = 6 months) and fixed appliance treatment (approximately 2 years) periods (T3). The data were analyzed by means of analysis of variance (ANOVA) and least significant difference (LSD) tests. Hearing levels of the patients were improved and air-bone gaps decreased at a statistically significant level (P < .001) during active expansion (T2-T1) and the retention and fixed appliance treatment (T2-T3) periods. Middle ear volume increased in all observation periods. However, a statistically significant increase was observed only in the T2-T3 period. No significant change was observed in the static compliance value. The hypothesis is rejected. RME treatment has a positive and statistically significant effect on both improvements in hearing and normal function of the eustachian tube in patients having transverse maxillary deficiency and CHL.The Angle Orthodontist 05/2008; 78(3):409-14. · 1.21 Impact Factor -
Article: Condylar asymmetry in unilateral posterior crossbite patients.
[show abstract] [hide abstract]
ABSTRACT: Posterior crossbite is defined as an abnormal buccolingual relationship between opposing posterior teeth including the canines in centric occlusion. The most common form of posterior crossbite is unilateral with a functional shift of the mandible toward the crossbite side. Lateral shift of the mandible in functional crossbite patients results in mandibular skeletal deflection to the crossbite side. Thus, the asymmetrical position of the mandible in these patients can result in asymmetrical condylar heights. The purpose of this study was to investigate condylar and ramal asymmetries in unilateral crossbite patients as compared with normocclusive subjects. The study groups included 81 patients with unilateral posterior crossbite and a control group of 75 patients with normal occlusion. Condylar, ramal, and condylar-plus-ramal asymmetry values were computed for all subjects on panoramic radiographs. Data were analyzed statistically with ANOVA for repeated measures and univariate ANOVA. The patients with unilateral posterior crossbite had more asymmetric condyles than did the controls. In addition, condylar, ramal, and condylar-plus-ramal heights on the crossbite side were smaller than those on the noncrossbite side. Subjects with functional unilateral posterior crossbite have asymmetrical condyles.American journal of orthodontics and dentofacial orthopedics: official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics 04/2008; 133(3):382-7. · 1.33 Impact Factor
Top co-authors
Top Journals
Institutions
-
2009–2011
-
Ataturk University
Erzurum, Erzurum, Turkey
-
