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Bulunan: 36 Adet 0.001 sn
Koleksiyon [4]
Tam Metin [1]
Yazar [19]
Yayın Türü [1]
Konu Başlıkları [20]
Yayın Tarihi [14]
Dergi Adı [10]
Yayıncı [2]
Dil [1]
Yazar Departmanı [1]
The role of cervical headgear and lower utility arch in the control of the vertical dimension

Ülger, G. | Arun, T. | Sayinsu, K. | Isik, F.

Article | 2006 | American Journal of Orthodontics and Dentofacial Orthopedics130 ( 4 ) , pp.492 - 501

Introduction: This study was carried out to evaluate the treatment changes in skeletal and dental parameters in growing patients. Methods: The sample consisted of 24 subjects with Class II Division 1 malocclusion. Half of the patients were treated with cervical headgear alone (group C, n = 12), and the other half received a combination of cervical headgear and lower utility arch (group CU, n = 12). The treatment groups were compared with a matched untreated control group (n = 12). The mean ages of the subjects at the beginning of the study were 8.85 ± 1.19 years in group C, 9.23 ± 0.76 years in group CU, and 8.62 ± 0.78 years in the . . . control group. The cervical headgear was used with an expanded inner bow and a 15° to 20° upward bend of the longer outer bow, worn 12 to 14 hours a day, with a force of 450 to 500 g per side. The lower utility arch was designed as described in the bioprogressive technique. Treatment changes were assessed on lateral cephalometric radiographs. Results: The cervical headgear produced Class II correction through maxillary orthopedic and orthodontic changes. Anterior face height increased more in the treatment groups than in the control group. The treatment groups also displayed statistically significant increases in ramus height. Due to these effects, mandibular plane orientation stayed relatively unchanged. There was no opening rotation of the mandible in the treatment groups. The lower utility arch produced intrusion and lingual tipping of the mandibular incisors and distal tipping without extrusion of the mandibular molars. The treatment groups showed significant anterior descents of the palatal plane. Maxillary molar total extrusion produced by cervical headgear treatment was an average of no more than 1 mm as compared with the control group. The utility arch did not appear to influence mandibular rotational response. © 2006 American Association of Orthodontists Daha fazlası Daha az

A cephalometric comparative study of class II correction with Sabbagh universal spring (SUS2) and forsus FRD appliances

Oztoprak, M.O. | Nalbantgil, D. | Uyanlar, A. | Arun, T.

Article | 2012 | European Journal of Dentistry6 ( 3 ) , pp.302 - 310

Objective: The purpose of this clinical prospective study was to compare the dentofacial changes produced by the Sabbagh Universal Spring (SUS2) and Forsus FRD appliances in late adolescent patients with Class II malocclusion, and quantify them in comparison with an untreated group. Method: The study was carried out on 59 patients with skeletal and dental Class II malocclusion due to retrognatic mandible. Among these, 20 were treated with SUS2, 20 were treated with FRD, and no treatment was done to 19 subjects as the control group. 36 cephalometric landmarks were identified on each lateral cephalometric radiograph. Results: The effe . . .cts of both appliances wer dentoalveolar and no significant vertical and sagittal skeletal effect on maxilla and mandible was achieved. Theretrusion and extrusion of the maxillary incisors as well as the protrusion and intrusion of mandibular incisorswere found to be statistically significant in both treatment groups. Soft tissue profile improvement was limitedin both treatment groups. Conclusions: Both appliances corrected Class II discrepancies through dentoalveolar changes; however lower incisor proclination was more prominent with the Forsus FRD Daha fazlası Daha az

Treatment of Condylar Hypoplasia with Distraction Osteogenesis: A Case Report

Arun, T. | Kayhan, F. | Kiziltan, M.

Article | 2002 | Angle Orthodontist72 ( 4 ) , pp.371 - 376

This report describes the surgical-orthodontic treatment procedures of a patient with condylar hypoplasia. Condylar hypoplasia is a major factor in any facial abnormality in a growing child. This case report describes a patient with a facial anomaly with an acquired unilateral condylar hypoplasia. His asymmetry was corrected by using functional therapy for the correction of muscle tonus and distraction osteogenesis for lengthening the mandibular ramal height. Fixed orthodontic appliances were used for conventional orthodontic therapy and final occlusal adjustment.

Perception of pain and discomfort during tooth separation.

Nalbantgil, D. | Cakan, D.G. | Oztoprak, M.O. | Arun, T.

Article | 2009 | Australian orthodontic journal25 ( 2 ) , pp.110 - 115

OBJECTIVES: To evaluate patients' perceptions of pain and discomfort during tooth separation and to compare the effectiveness of brass wire and elastomeric separators. METHODS: The participants were 87 adults with a mean age of 22.1 +/- 1.9 years. Elastomeric and brass wire separators were inserted mesial and distal to upper right (elastomeric separators) and upper left first molars (brass wire separators) in each subject. After seven days, the amount of tooth separation was measured with a leaf gauge, and pain perception and discomfort were evaluated with a visual analogue scale and questionnaire. RESULTS: The elastomeric separator . . .s produced significantly more separation than the wire separators. There was a statistically significant difference in the subjects' perceptions of pain and discomfort at rest and during chewing between the different separators (p < 0.001). In general, the brass wire separators caused the greatest pain and discomfort immediately after insertion. Pain from the wire separators subsided over seven days, whereas elastomeric separators caused the greatest pain on the first two days after insertion. Eating was negatively influenced by the separation in 61 per cent of the subjects on the first day. On the other hand, other daily activities were affected minimally. CONCLUSIONS: The different levels of pain and discomfort caused by these separators, together with their advantages and disadvantages, can help the clinician to choose an appropriate separator. Patients should be warned that pain due to separation may affect their chewing, social life, school work and sleeping. Analgesics and soft food are recommended following placement of separators Daha fazlası Daha az

Unilateral molar distalization with a modified slider

Sayinsu, K. | Isik, F. | Allaf, F. | Arun, T.

Article | 2006 | European Journal of Orthodontics28 ( 4 ) , pp.361 - 365

Although there are numerous publications on bilateral non-compliance molar distalization appliances, there is limited information on problems such as asymmetrical unilateral Class II malocclusions. The aim of the present investigation was to examine the distalization of molars unilaterally in patients with a unilateral Class II molar relationship utilizing a Keles Slider, designed without a bite plane. Ten girls (mean age 13.94 ± 2.13 years) and seven boys (mean age 13.12 ± 1.51 years) comprised the study material. Following insertion of the appliance, the patients were seen monthly and the screw was reactivated every 2 months. Afte . . .r a super-Class I molar relationship was achieved, the appliance was removed and the molars were stabilized with a Nance appliance for 2 months before the second-phase of orthodontic treatment. The Nance appliance was maintained in the palate until the end of canine distalization. Lateral cephalometric radiographs were obtained before and immediately after insertion of the molar distalizer. The results showed that the maxillary first molars were distalized bodily on average by 2.85 mm. The maxillary first premolars moved forward bodily 2 mm and were extruded 2.03 mm. In all, 1.32 mm of protrusion, 1.12 mm of extrusion, and 1.79 degrees of proclination of the upper incisors were observed. The mandibular incisors and mandibular molars erupted 0.83 and 0.95 mm, respectively. The unilateral Keles Slider distalized molars successfully to a Class I molar relationship Daha fazlası Daha az

Debonding of ceramic brackets by a new scanning laser method

Oztoprak, M.O. | Nalbantgil, D. | Erdem, A.S. | Tozlu, M. | Arun, T.

Article | 2010 | American Journal of Orthodontics and Dentofacial Orthopedics138 ( 2 ) , pp.195 - 200

Introduction: The purpose of this in-vitro study was to develop a new method to debond ceramic brackets by scanning with an Er:YAG laser. Methods: Sixty bovine mandibular incisors were randomly divided into 2 groups of 30. Polycrystalline ceramic brackets were placed on their labial surfaces by using the orthodontic composite adhesive Transbond XT (3M Unitek, Monrovia, Calif) and light cured for a total of 40 seconds. The first group was the control group, with no laser application performed. The Er:YAG laser was used on each bracket in the study group at 4.2 W for 9 seconds with the scanning method. The force required for debonding . . . the brackets was applied 45 seconds after laser exposure. Shear bond strengths were measured in megapascals with a universal testing machine, and adhesive remnant index scores were assigned to each specimen. Results: Statistically significant (P Daha fazlası Daha az

Evaluation of facial hard and soft tissue asymmetry using cone-beam computed tomography

Nur, R.B. | Çakan, D.G. | Arun, T.

Article | 2016 | American Journal of Orthodontics and Dentofacial Orthopedics149 ( 2 ) , pp.225 - 237

Introduction The purposes of this study were to (1) evaluate facial asymmetry 3 dimensionally using cone-beam computed tomography (CBCT) and (2) compare the right and left facial hard and soft tissues volumetrically and their interferences on each other. Methods The CBCT data of 49 asymmetric (soft tissue menton deviation, ?4 mm; distance from the facial midline) (mean age, 19.9 ± 5.6 years) and 39 symmetric patients (soft tissue menton deviation,

Effects of different silanes and acid concentrations on bond strength of brackets to porcelain surfaces

Trakyali, G. | Malkondu, O. | Kazazoglu, E. | Arun, T.

Article | 2009 | European Journal of Orthodontics31 ( 4 ) , pp.402 - 406

The aim of this study was to determine the optimum silane-coupling agent and the optimum concentration of acid agent when bonding to porcelain surfaces. Eighty deglazed feldspathic porcelain discs with a diameter of 10 mm and a thickness of 2 mm mounted in acrylic resin blocks were randomly divided into four groups. In groups 1 and 2, the porcelain surfaces were etched with 9.6 per cent hydrofluoric (HF) acid and in groups 3 and 4 with 5 per cent HF acid. In groups 1 and 3, the Dynalock maxillary central incisor brackets were bonded with Pulpdent silane and Unite bonding adhesive and in groups 2 and 4 with Reliance silane and Unite. . . . Shear forces were applied to the samples using an Instron universal test machine. The non-parametric Kruskal-Wallis test was used to determine significant differences in bond strengths between the four groups and Dunn's multiple comparison test to compare subgroups. The mean bond strengths and standard deviations of groups 1 to 4 were 5.51 ± 1.19, 6.54 ± 0.002, 4.55 ± 1.93, and 6.39 ± 0.45 MPa, respectively. Specimens bonded with Reliance showed a statistically significantly higher in vitro bond strength than those bonded with Pulpdent. The concentration of etching gels did not result in any statistically significant difference on the in vitro bond strength when evaluated separately Daha fazlası Daha az

FEM analysis of a new miniplate: Stress distribution on the plate, screws and the bone

Nalbantgil, D. | Tozlu, M. | Ozdemir, F. | Oztoprak, M.O. | Arun, T.

Article | 2012 | European Journal of Dentistry6 ( 1 ) , pp.9 - 15

Objectives: Non-homogeneous force distribution along the miniplates and the screws is an unsolved question for skeletal anchorage in orthodontics. To overcome this issue, a miniplate structure was designed featuring spikes placed on the surface facing the cortical bone. The aim of this study was to examine and compare the force distribution of the newly designed plate-screw systems with the conventional one. Methods: A model of bone surface with 1.5 mm cortical thickness, along with the two newly designed miniplates and a standard miniplate-screw were simulated on the three-dimensional model. 200 g experimental force was applied to . . .the tip of the miniplates and the consequential effects on the screws and cortical bone was evaluated using three-dimensional finite element method. Results: As a result of this finite element study, remarkably lower stresses were observed on the screws and the cortical bone around the screws with the newly designed miniplate when compared with the conventional one. Conclusion: The newly designed miniplate that has spikes was found effective in reducing the stress on and around the screws and the force was distributed more equivalently Daha fazlası Daha az

A comparative study of dental arch widths: Extraction and non-extraction treatment

Işik, F. | Sayinsu, K. | Nalbantgil, D. | Arun, T.

Article | 2005 | European Journal of Orthodontics27 ( 6 ) , pp.585 - 589

The aim of this study was to determine the pre-and post-treatment width changes in the canine, premolar and molar regions in subjects treated with extraction of four first premolars, non-extraction, and non-extraction with rapid maxillary expansion (RME). Pre- and post-treatment orthodontic study models of 60 females (13.83 ± 2.77 years) and 24 males (14.33 ± 2.67 years) who underwent comprehensive orthodontic therapy were evaluated. Forty-two were treated non-extraction with fixed appliance therapy, 15 non-extraction with RME, and 27 with extraction of the first premolars. In addition to standard descriptive statistical calculation . . .s, one way ANOVA was used for comparison of the groups, and the post hoc Tukey multiple comparison test for comparison of the subgroups. The results revealed that the distance between the upper canines was not affected by the treatment modality. Upper premolar and molar arch widths increased more in the non-extraction subjects when compared with those with extractions, with the greatest increase in patients with RME. In the lower canine area the extraction group showed the widest arch width at the end of treatment. There was also a 0.60 mm decrease in the lower canine width in the non-extraction group. A decrease was found in lower inter-premolar and molar distances due to consolidation of the extraction spaces. When making a decision between non-extraction with maxillary expansion and extraction treatment modalities in borderline cases where there is constriction in the upper inter-premolar distance, apart from taking profile values into consideration, it should be borne in mind that expansion treatment can be helpful in achieving a wider arch form. © The Author 2005. Published by Oxford University Press on behalf of the European Orthodontics Society. All rights reserved Daha fazlası Daha az

Reduction of salivary mutans streptococci in orthodontic patients during daily consumption of yoghurt containing probiotic bacteria

Cildir, S.K. | Germec, D. | Sandalli, N. | Ozdemir, F.I. | Arun, T. | Twetman, S. | Caglar, E.

Article | 2009 | European Journal of Orthodontics31 ( 4 ) , pp.407 - 411

Previous studies have suggested that probiotic supplements in dairy products may affect the oral microbial ecology, but the effect in orthodontic patients has not previously been reported. The aim of the present study was to examine whether short-term consumption of fruit yogurt containing probiotic bifidobacteria would affect the levels of salivary mutans streptococci and lactobacilli in patients with fixed orthodontic appliances. A double-blind, randomized crossover study was performed and 24 healthy adolescents (12-16 years) undergoing orthodontic treatment were followed over four periods. During periods 2 and 4 (2 weeks each), t . . .he subjects ingested 200 g fruit yogurt containing Bifidobacterium animalis subsp. lactis DN-173010 (2 × 10 8 colony forming units/g) once daily or a control yogurt without viable bacteria. Periods 1 and 3 were run-in and wash-out periods of 1 and 6 weeks, respectively. Salivary mutans streptococci and lactobacilli were enumerated with chair-side kits before and after the yogurt consumption periods. Pre- and post-treatment values within each regimen were compared with a two-tailed marginal homogeneity test for categorical data. A statistically significant reduction of salivary mutans streptococci was recorded after probiotic yogurt consumption (P < 0.05), which was in contrast to the control yogurt. No significant alterations of the salivary lactobacilli counts were observed. Short-term daily consumption of fruit yogurt containing Bifidobacterium animalis subsp. lactis DN-173010 may reduce the levels of mutans streptococci in saliva during orthodontic treatment with fixed appliances Daha fazlası Daha az

A comparative study of cephalometric and arch width characteristics of Class II division 1 and division 2 malocclusions

Isik, F. | Nalbantgil, D. | Sayinsu, K. | Arun, T.

Article | 2006 | European Journal of Orthodontics28 ( 2 ) , pp.179 - 183

The aim of this compound cephalometric and arch-width study was to determine any dental and/ or skeletal differences between subjects with Class II division 1 and Class II division 2 malocclusions. The dento-skeletal characteristics of Class II subjects were evaluated using lateral cephalometric radiographs and dental casts of 90 untreated patients. The sample included 46 Class II division 1 patients (19 girls and 27 boys) with a mean age of 15.27 ± 2.48 years, and 44 Class II division 2 patients (27 girls and 17 boys) with a mean age of 15.95 ± 3.25 years. The intermolar, interpremolar and intercanine measurements were carried out . . .on study models. The radiographs were digitized and processed using Dolphin Imaging software. In addition to standard descriptive statistical calculations, an independent samples t-test was carried out in order to compare the two groups. The non-parametric Mann-Whitney U test was utilized for the parameters for the data which were not normally distributed. The only statistically significant difference between the groups for the study model measurements was mandibular intercanine width. The cephalometric results revealed that SNB angle was responsible for the skeletal sagittal difference between the two groups. In addition, the Class II division 1 group had higher vertical proportions and the Class II division 2 group a more concave profile with a prominent chin. The sagittal skeletal pattern of Class II division 2 subjects was found to be very similar to the Class I skeletal relationship, with no evidence of any mandibular restriction. © The Author 2006. Published by Oxford University Press on behalf of the European Orthodontics Society. All rights reserved Daha fazlası Daha az

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