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Öğe Comparison of Forsus FRD EZ and Andresen activator in the treatment of class II, division 1 malocclusions(Springer Heidelberg, 2015) Bilgic, Fundagul; Basaran, Guvenc; Hamamci, OrhanPurpose of this study is to evaluate the effects of Forsus Fatigue-Resistant Device (FRD) EZ and Andresen activator in terms of skeletal, dental, and soft tissue changes in actively growing patients presenting with class II, division 1 malocclusion. Study sample included 60 subjects. Inclusion criteria were as follows: class II division 1 malocclusion, retrognathic mandible, normal or low-angle growth pattern, and peak growth period. The first study group consisted of 20 patients who were treated with Forsus appliance, and the second group of 20 patients received treatment with Andresen activator. Control group received no treatment. Our results revealed that both appliances enhanced mandibular growth, helped increase the length of the mandible, and had a restraining growth effect on the maxilla. Anterior face height increased in both of treatment groups, whereas posterior face height had a significant increase in the activator group only. More mandibular incisors protrusion and intrusion were seen with the Forsus appliance. Moreover, occlusal plane and palatal plane rotated significantly in clockwise direction as a result of dentoalveolar changes only in the Forsus group. As well as the Forsus appliances corrected class II discrepancies mostly through dentoalveolar changes as compared to the activator group, both appliances proved effective in the treatment of growing individuals having class II malocclusions with mandibular retrognathia. By this investigation, two treatment methods, which are currently used in clinical practice, will be evaluated, and the results will be useful for clinicians.Öğe Comparison of the effects of fixed and removable functional appliances on the skeletal and dentoalveolar structures(Sciendo, 2011) Bilgic, Fundaguel; Hamamci, Orhan; Basaran, GuvencObjective: To compare and analyse the effects of activator and Forsus FRD EZ appliances in the treatment of skeletal Class II division I malocclusion.Methods: Lateral cephalograms and hand-wrist radiographs were collected from 24 Class II division I growing patients (14 females, 10 males). The patients were randomly divided into two equal groups and either treated with an activator appliance (Mean age 12.67 & PLUSMN; 1.24 years) or with a Forsus FRD EZ appliance (Mean age 12.31 & PLUSMN; 1.09 years). Pretreatment and post-treatment cephalometric radiographs were obtained, traced, superimposed and data analysed using paired t-tests and the Wilcoxon signed rank test.Results: The results demonstrated that the Forsus FRD EZ effectively corrected the Class II malocclusion, but the changes were mainly dentoalveolar. The Forsus FRD EZ appliance induced a clockwise rotation of the occlusal plane without significant alteration in the vertical facial dimension. Skeletally, maxillary growth was restricted and pogonion moved forward which improved the profile.Conclusion: The Forsus FRD EZ appliance may be an effective dentoalveolar treatment method to manage a skeletal imbalance and improve the profile in growing patients.Öğe Comparison of the effects of fixed and removable functional appliances on the skeletal and dentoalveolar structures(Australian Soc Orthodontists Inc, 2011) Bilgic, Fundagul; Hamamci, Orhan; Basaran, GuvencObjective: To compare and analyse the effects of activator and Forsus FRD EZ appliances in the treatment of skeletal Class II division I malocclusion. Methods: Lateral cephalograms and hand-wrist radiographs were collected from 24 Class II division I growing patients (14 females, 10 males). The patients were randomly divided into two equal groups and either treated with an activator appliance (Mean age 12.67 +/- 1.24 years) or with a Forsus FRD EZ appliance (Mean age 12.31 +/- 1.09 years). Pretreatment and post-treatment cephalometric radiographs were obtained, traced, superimposed and data analysed using paired t-tests and the Wilcoxon signed rank test. Results: The results demonstrated that the Forsus FRD EZ effectively corrected the Class II malocclusion, but the changes were mainly dentoalveolar. The Forsus FRD EZ appliance induced a clockwise rotation of the occlusal plane without significant alteration in the vertical facial dimension. Skeletally, maxillary growth was restricted and pogonion moved forward which improved the profile. Conclusion: The Forsus FRD EZ appliance may be an effective dentoalveolar treatment method to manage a skeletal imbalance and improve the profile in growing patients. (Aust Orthod J 2011; 110-116)Öğe 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, OrhanObjective. 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.Öğe The Effects of Extraction and Non-Extraction Treatment on RME Applied Patients(Aves Press Ltd, 2010) Hamamci, Nihal; Akkurt, Atilim; Dogru, Mehmet; Veli, Ilknur; Hamamci, OrhanAim: The aim of this study was to compare the dentoalveolar, skeletal and soft tissue effects of upper two premolar extraction or nonextraction treatments after Rapid Maxillary Expansion (RME). Subjects and Methods: The sample of this study consisted of pre and posttreatment lateral cephalometric radiographs of 21 patients characterized by narrow maxilla and treated with or without extraction following RME. In our study, RME applied patients were divided into two groups as extraction and nonextraction. After adequate expansion and retention period, two upper first premolars were extracted in extraction group and no teeth were extracted in nonextraction group. Thereafter, fixed orthodontic treatment was started in two groups. Results: At the end of treatment when extraction and nonextraction groups were compared, significant differences in A1 inclination to A-Po angle (p < 0.01), A1 to A-Po plane (p < 0.05) and B1 to A-Po plane distance (p < 0.05) representing the dentoalveolar incisor position were detected. Also statistically no significant differences were found between parameters related to lips or soft tissues. Our results do not support the idea that more retrusive profile occurs as a result of upper extraction treatment. Conclusions: In the light of these results, it is possible to say that there is no esthetic difference between the RME appliances patient treated by either upper premolar extraction or nonextraction treatment.Öğe Etching enamel for orthodontics with an erbium, chromium:yttrium-scandium-gallium-garnet laser system(E H Angle Education Research Foundation, Inc, 2007) Basaran, Guvenc; Ozer, Torun; Berk, Nukhet; Hamamci, OrhanObjective: To test the shear bond strength, surface characteristics, and fracture mode of brackets that are bonded to enamel etched with an erbium, chromium:yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser operated at different power outputs: 0.5 W, 1 W, and 2 W. Materials and Methods: Human premolars that had been extracted for orthodontic purposes were used. Enamel was etched with an Er,Cr:YSGG laser system operated at one of three power outputs or with orthophosphoric acid. Results: The shear bond strength associated with the 0.5-W laser irradiation was significantly less than the strengths obtained with the other irradiations. Both the 1-W and 2-W laser irradiations were capable of etching enamel in the same manner. This finding was confirmed by scanning electron microscopy examination. The evaluation of adhesive-remnant-index scores demonstrated no statistically significant difference in bond failure site among the groups, except for the 0.5-W laser-etched group. Generally, more adhesive was left on the enamel surface with laser irradiation than with acid etching. Conclusion: The mean shear bond strength and enamel surface etching obtained with an Er,Cr: YSGG laser (operated at 1 W or 2 W for 15 seconds) is comparable to that obtained with acid etching.Öğe Interleukine-1? and tumor necrosis factor-? levels in the human gingival sulcus during orthodontic treatment(E H Angle Education Research Foundation, Inc, 2006) Basaran, Guvenc; Ozer, Torun; Kaya, Filiz Acun; Kaplan, Abdurrahman; Hamamci, OrhanObjective: To test whether interleukine 1 beta (IL-1 beta) and tumor necrosis factor-alpha (TNF-alpha) levels differ from each other in different treatment levels. Materials and Methods: Eighteen patients, nine female and nine male (aged 16-19 years; mean 17.4 +/- 1.8 years), participated in this study. Each subject underwent a session on professional oral hygiene and received oral hygiene instructions. Two months later, a fixed orthodontic appliance was placed. The patients were seen at baseline, at days 7 and 21 and at the 3rd and 6th month as the leveling of the teeth occurred. Records of the baseline scores for the distalization forces were taken at the 6th month. Days 7 and 21 after 6 months of treatment were also recorded. Results: There were increases in the volume of gingival crevicular fluid (GCF) and in the concentrations of IL-1 beta and TNF-alpha. Conclusions: Leveling and distalization of the teeth evoke increases in both the IL-1 and TNF-alpha levels that can be detected in GCF.Öğe Interleukins 2, 6, and 8 levels in human gingival sulcus during orthodontic treatment(Mosby-Elsevier, 2006) Basaran, Guvenc; Ozer, Torun; Kaya, Filiz Acun; Hamamci, OrhanIntroduction: The aims of this study were to determine levels of interleukins 2, 6, and 8 during tooth movement, and test whether they differ from each other with leveling and distalization forces used in various treatment stages of standard orthodontic therapy. Methods: Fifteen patients (9 female, 6 male; ages, 15-19 years; mean age, 16.7 +/- 2.3 years) participated in this study. Each underwent a session of professional oral hygiene and received oral hygiene instructions. Two months later, a fixed orthodontic appliance was placed. The patients were seen at baseline, at days 7 and 21, and as the teeth were leveled. Records of the baseline scores for the distalization forces were taken at the sixth month. Scores of days 7 and 21 after 6 months of the distalization treatment were also recorded. Results: Increases were seen in the volume of gingival crevicular fluid and the concentrations of interleukins 2, 6, and 8. Conclusions: Leveling and distalization of the teeth evoke increases in interleukins 2, 6, and 8 levels in the periodontal tissues that can be detected in gingival crevicular fluid.Öğe The Level of IL-1? In Orthodontically Treated Osteopototlc Rats(Aves Press Ltd, 2008) Gunduz-Arslan, Seher; Kaya, Filiz Acun; Arslan, Huseyin; Kaya, Can Ayhan; Hamamci, OrhanThis study aims to evaluate the levels of IL-1 beta, in samples taken from the gingival crevicular fluid (GFU) of osteoporotic rats during orthodontic treatment. 33 adult female Spraque-Dawley rats were divided into 2 groups. (15 control and 18 study group) In study group bilateral ovariectomy was carried out to create osteoporotic rats. And also in control group sham operation was carried out. Two months following the operation, an open coil spring applying 10g force, was placed actively between the upper incisors of the rats Shortly after activation, samples were taken from the gingival crevicular fluid from the vestibular surface of appliance fixed teeth on the 3rd,7th and 10th days. Samples were analyzed biochemically. The statistical analysis of data acquired from the samples was carried out by using ANOVA test. The evaluation of the changes between the groups was carried out by using Mann Whitney U test. It was observed that the level of IL-1 beta were high on the 3rd and 7th in both groups. In the comparison of control and study groups there were significant differences between the working days.Öğe 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, OrhanOrthodontists 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.Öğe Nonsurgical Correction of Severe Anterior Openbite Malocclusion(Aves Press Ltd, 2008) Gunduz-Arslan, Seher; Ozant, Ahmet; Hamamci, OrhanThis case report describes the treatment of a 17 years and 2 months old male patient presenting vertical discrepancy, with severe anterior open bite and Class II subdivision malocclusion with a history of dummy sucking and mouth breathing. The patient showed a straight type in lateral profile and his lips were incompetent at rest. He had an anterior open bite of 8 mm, an overjet of 6 mm. In consultation with the patient and his parents, a nonsurgical therapy was elected and the goals were; to close the anterior open-bite and to achieve a good function and esthetic. By extraction of maxillary and the first molar, usage of maxillary bite plate with occipital headgear and usage of the rectangular arch wire with reverse curve of Spee applied to the mandible and increased curve of Spee (0.016x0.022 '') rectangular arch wire applied to the maxillary arch open bite was eliminated.As a result,the patient was treated successfully with suitable nonsurgical treatments.Öğe Relationship Between law Positions and Cranial Base Angle(Aves Press Ltd, 2006) Basaran, Guvenc; Ozer, Torun; Hamamci, OrhanCranial base flexure has long been of interest to orthodontists. This indicates that the cranial base flexure may or may not have an effect on the facial prognathism and classification of malocclusions. The present study evaluates the correlation of cranial base flexure and craniofacial pattern. The sample consisted of 150 individuals from 5 different malocclusion groups. Records were matched for age and sex as far as possible. ANOVA test was used to investigate intergroup variability. The group means were compared by independent t test. Intervariable correlations were also compiled. Cranial base angle does not appear to have an important role in determining malocclusion.Öğe Treatment Objectives of a Patien with Severe Maxillary and Mandibular Crowding Mandibular Retrognathia and Maxillary Prognathia(Aves, 2012) Bilgic, Fundagul; Basaran, Guvenc; Meric, Pamir; Hamamci, OrhanThe purpose of this study was to evalute the sketetal, dental and soft tissue changes in patient with severe maxitlary and mandibutar crowding, mandibular retrognathta and four first premolar extraction and fixed functional treatment
