Bulunan: 41 Adet 0.000 sn
Koleksiyon [4]
Tam Metin [1]
Eser Sahibi [7]
Yayın Türü [3]
Yayın Tarihi [9]
Yayıncı [16]
Kayıt Giriş Tarihi [14]
Dergi Sayısı [9]
Yayın Dili [2]
Konu Başlıkları [20]
Editör/Editörler [2]
Effects of modified and conventional facemask therapies with expansion on dynamic measurement of natural head position in Class III patients


Makale | 2011 | American Journal of Orthodontics and Dentofacial Orthopedics

Introduction: The aim of this prospective clinical trial was to assess the effects of varying force directions on the dynamic measurement of natural head position and orofacial airway dimensions of Class III patients during maxillary orthopedic protraction compared with an untreated control group. Methods: The conventional facemask group comprised 15 patients (8 girls, 7 boys; mean age, 9.6 6 1.3 years), the modified facemask group comprised 15 patients (7 girls, 8 boys; mean age, 9.5 6 1.5 years), and the control group comprised 15 subjects (7 girls, 8 boys; mean age, 9.8 6 1.6 years). Natural head position measurements and ce . . .phalometric records were obtained from all subjects before and after treatment or the control period (approximately 1 year). An inclinometer and a portable data logger were used to collect the dynamic natural head position data. For statistical comparisons, paired samples t tests, analysis of variance (ANOVA), and post-hoc Tukey tests were used at the P\0.05 level. Results: Both treatment groups showed statistically significant changes in the sagittal (pitch) measurements of natural head position and upper pharynx, aerial, and total area of airway measurements during the treatment period. In the control group, the only statistically significant change was an increased upper pharynx measurement (P 5 0.020). According to the intergroup comparisons, statistically significant natural head position differences were found in the conventional (6.4 flexion) and the modified (5.7 flexion) facemask groups when compared with the controls. The modified facemask group also showed significant changes in aerial (P 5 0.003) and total (P\0.001) areas of the airway measurements compared with the control group. No statistically significant differences were observed between the 2 treatment groups. Conclusions: These findings suggest that modified and conventional facemask therapy with expansion have significant cranial flexion effects on the dynamic measurements of natural head position. Additionally, the modified facemask procedure showed significant effects on the orofacial airway dimensions compared with the initial values and the values of the untreated controls Daha fazlası Daha az

Ethnic differences in dentofacial relationships of Turkish and Saudi young adults with normal occlusions and well-balanced faces


Makale | 2011 | Elsevier

Objectives: The aims of the present study were (1) to determine ethnic differences in craniofacial dimensions between Turkish and Saudi populations and (2) to identify possible gender differences between males and females, based on a sample of untreated young adult subjects with normal occlusions and well-balanced faces. Methods: In total, 163 cephalometric radiographs were traced and evaluated to compare untreated adults of Turkish and Saudi ethnicity. The Turkish group comprised 86 subjects; 45 females and 41 males. The Saudi group comprised 77 subjects; 39 females and 38 males. For statistical evaluation, an independent-sa . . .mples t-test was performed. Results: The Turkish sample had a more retrognathic maxilla and mandible (p< 0.001 for SNA and SNB) and a more vertical direction of facial development (p< 0.001), with Turkish males having more retrusive lips (p< 0.001). Distinctive ethnic differences were found in craniofacial structures between Turkish and Saudi young adults. Conclusions: It is appropriate to consider these aesthetic differences when a Turkish or a Saudi patient is being evaluated during routine diagnosis and treatment planning Daha fazlası Daha az

Ebeveynlerin pedodonti konusundaki tutumu nedir?


Makale | 2008 | Selçuk Üniversitesi Diş Hekimliği Fakültesi

Background: The aim of this study is to determine the relationship between the educational status of the parents who applied to the pediatric dentistry clinic and their approach to children’s oral-den- tal health. Methods: Questionnaire form with 8 question was used for parents. 226 parents which were selected randomly were included to the study. All parents gave their verbal assent to participation and infor- mation about questionnaire was given to them. The data were ana- lyzed by using chi-square tests. Results: The mean age for the mothers was 34,9, for the fathers was 39, for their children was 8,6. There was significant differ . . .ence search for ‘parents education status and who referred you to the pediatric dentistry clinic?’ ( Daha fazlası Daha az

Açık apeksli dişlerde MTA fillapex'in apikal sızıntıya etkisinin değerlendirilmesi


Makale | 2012 | Türkiye Klinikleri

Amaç: Nekrotik pulpalı immatür dişlerde kök ucunun açık olması, kök kanal sisteminin geniş ve kök ucuna doğru genişleyerek sonlanması nedeniyle bu dişlerde endodontik tedavi ile etkili bir apikal tıkama oluşturulması oldukça zordur. Bu yüzden bu dişlerin endodontik tedavilerinde kullanılacak kök kanal dolgu sisteminin apikal tıkama özelliği önem kazanmaktadır. Çalışmamızda hazırlanan simule immatür dişlerde yeni üretilmiş MTA Fillapex kanal dolgu patının Güta-perka ile birlikte kullanımı ve oluşturduğu apikal tıkamanın etkinliği Güta-perka/AH Plus kanal dolgu sistemi ile karşılaştırılarak in vitro koşullarda değerlendirilmesi amaçla . . .nmıştır. Gereç ve Yöntemler: Çalışmada 20 adet örnek Güta-perka/MTA Fillapex, diğer 20 adet örnek ise Güta-perka/AH Plus ile doldurulmuştur. Bulgular: Boya sızıntı testi ile elde edilen sonuçlar istatistiksel olarak değerlendirildiğinde Güta-perka/MTA Fillapex, Güta-perka/AH Plus sistemine göre anlamlı düzeyde ( Daha fazlası Daha az

An In Vitro Comparison of Different Diagnostic Methods in Detection of Residual Dentinal Caries


Makale | 2010 | Hindawi Publishing Corporation

The aim of this study was to investigate the efficiency of different diagnostic methods in detection of residual dentinal caries in excavated cavities. Fifty extracted molar with deep dentinal carious lesions were excavated using a slow-speed handpiece. All cavities were assessed by laser fluorescence(LF) device, electronic caries monitor(ECM), and caries detector dye(CDD) by three independent observers blindly. The measurements were repeated after two weeks. Specimens containing dentin slices 150 μm in thickness were prepared for histological analyses. The existence and absence of carious dentin was determined using a lig . . .htmicroscope. The average intraobserver accuracy was 1.00 (perfect agreement) for CDD, 0.86 (excellent agreement) for ECM, and 0.50 (good agreement) for LF. The average interobserver accuracy values were 0.92 (excellent agreement), (0.36 marginal agreement) and 0.48 (good agreement), for CDD, ECM, and LF, respectively. The average specificity was 0.60 for CDD, 73% for ECM, and 0.50 for LF. The average sensitivity was 0.55 for CDD, 0.85 for LF, and 0.47 for ECM. The average accuracy values were 0.53, 0.51, and 0.81 for CDD, ECM, and LF, respectively. LF had the greatest sensitivity and accuracy values of any of the methods tested. As a conclusion, LF device is appeared to most reliable method in detection of remain caries in cavity. However, because of its technical sensitivity it may susceptible to variations in measurements. To pay attention to the rule of usage and repeated measurements can minimize such variations in clinical practice. It was concluded that LF is an improvement on the currently available aids for residual caries detection Daha fazlası Daha az

Mandibular anterior bony support and incisor crowding: Is there a relationship?


Makale | 2012 | American Association of Orthodontists

INTRODUCTION: The aim of this study was to test the null hypothesis that increased irregularity of the mandibular incisors is associated with a reduction in the alveolar support on cone-beam computed tomographic sections. METHODS: From a sample of 1100 digital volumetric tomographs, 125 tomographs of subjects with Class I malocclusion (mean age, 21.6 ± 4.8 years) were selected for this study. An irregularity index was used to categorize these tomographs as having mild, moderate, or severe crowding. All tomographs were taken by using an iCAT (Imaging Sciences International, Hatfield, Pa) imaging device. The following parameters we . . .re measured on the sections corresponding to the 4 mandibular incisors with the iCAT software: height, thickness, and area of the entire symphysis; height, thickness, and area of the cancellous bone of the symphysis; and distance between the vestibular and lingual cortices. For the statistical evaluation, independent samples t test, analysis of variance, and the Tukey HSD test were used at an alpha level 0.05. The Pearson correlation coefficient and a simple linear regression were calculated to determine the relationship between mandibular anterior bony support and incisor crowding. RESULTS: Almost all mandibular anterior bone measurements were greater in the male subjects than in the female subjects (height of the mandibular symphysis, P Daha fazlası Daha az

Mandibular asymmetry in unilateral and bilateral posterior crossbite patients using cone-beam computed tomography


Makale | 2011 | The E. H. Angle Education and Research Foundation

Objective: To test the hypotheses that (1) there is no difference in mandibular asymmetry between the crossbite and normal side in a unilateral crossbite group (UCG) and between the right and left sides in a bilateral crossbite group (BCG) and a control group (CG); and (2) there is no significant difference in mandibular asymmetry among crossbite groups and control group. Materials and Methods: The cone-beam computed tomography scans of three groups were studied: (1) 15 patients (6 male, 9 female; mean age: 13.51 6 2.03 years) with unilateral posterior crossbite; (2) 15 patients (8 male, 7 female; mean age: 13.36 6 2.12 years) . . . with bilateral posterior crossbite; and (3) 15 patients (8 male, 7 female; mean age: 13.46 6 1.53 years) as a control group. Fourteen parameters (eight linear, three surface, and three volumetric) were measured. Side comparisons were analyzed with paired samples t-test, and for the intergroup comparison, analysis of variance (ANOVA) and Tukey tests were used at the P , .05 level. Results: According to side comparisons, no statistically significant difference was found in the UCG. There were statistically significant differences in hemimandibular (P 5 .008) and ramal (P 5 .004) volumes for the BCG and in ramal height (P 5 .024) and body length (P 5 .021) for the CG. Intergroup comparisons revealed significant differences in hemimandibular (P 5 .002) and body volume (P , .001) for the normal side of the UCG and left sides of the other groups, and in angular unit length (P 5 .025) and condylar width (P 5 .007) for the crossbite side of the UCG and the right sides of the other groups. Conclusions: Contrary to UCG, CG and BCG were found to have side-specific asymmetry. Skeletal components of the mandible have significant asymmetry among the crossbite groups and the CG Daha fazlası Daha az

Effect of antibacterial monomer-containing adhesive on enamel demineralization around orthodontic brackets: An in-vivo study


Makale | 2011 | American Journal of Orthodontics and Dentofacial Orthopedics

Introduction: The aims of this study were to evaluate the effect of an antibacterial monomer-containing selfetching adhesive in reducing enamel demineralization around orthodontic brackets in vivo and to compare it with the conventional adhesive system quantitatively. Methods: Fourteen orthodontic patients were randomly divided into 2 equal groups; they received brackets fitted to all their teeth, bonded with either Clearfil Protect Bond (Kuraray Medical, Okayama, Japan) (experimental group) or Transbond XT (3M Unitek, Monrovia, Calif) (control group). Block randomization to obtain equal numbers in each group was used. After 30 . . . days, all first premolars were extracted with orthodontic indications and longitudinally sectioned. Demineralization was assessed by cross-sectional microhardness. Determinations were made at the bracket edge cementing limits and at occlusal and cervical points 100 and 200 mm away from the edge. In all of these positions, 6 indentations were made at depths of 10 to 90 mm from the enamel surface. Analysis of variance (ANOVA) and the Tukey post-hoc test were used. The statistical significance level was set at P\0.05. Results: ANOVA showed statistically significant differences for adhesive type, position, depth, and their interactions (P\0.05). The multiple comparison test showed that the antibacterial monomer-containing adhesive was significantly more efficient than the conventional adhesive system, reducing enamel demineralization in almost all evaluations (P \0.05). Conclusions: The results indicated that using antibacterial monomer-containing adhesive for bonding orthodontic brackets successfully inhibited caries in vivo. This cariostatic effect was localized at the area around the brackets and was significant after 30 days Daha fazlası Daha az

Effect of resveratrol on bone formation in the expanded inter-premaxillary suture: early bone changes


Makale | 2011 | Wiley

Objective –The aim of this study was to evaluate the effects of local resveratrol (RSVL) administration on bone formation in response to expansion of the interpremaxillary suture, in rats. Material and Methods – Twenty 50- to 60-day-old male Wistar rats were separated into two equal groups. Both groups were subjected to expansion, and 30 cN of force was applied to the maxillary incisors with helical-spring. Twenty-four hours after appliance placement, single-dose 10 lmol ⁄ kg RSVL in the dimethylsulfoxide (DMSO) was injected to the inter-premaxillary suture in the experimental group. In the control group, the same amount of . . .DMSO was injected to the suture of rats. Bone formation in the suture was evaluated histomorphometrically. The area of new bone (lm2), the perimeter around the new bone (lm), Feret s diameter (lm), the percentage of new bone to non-ossified tissue (%), and the number of osteoblast were measured and compared. Mann–Whitney U-test was used for statistical evaluation at p < 0.05 level. Results – Statistically significant differences were found between the groups for all histomorphometric parameters. New bone area (p < 0.001), bone perimeter (p < 0.001), Feret s diameter (p < 0.001), percentage of new bone (p < 0.001), and the number of osteoblast (p < 0.001) were significantly larger in the experimental group when compared with the control. Bone histomorphometric measurements revealed that bone architecture in the RSVL treated rats was improved. Conclusions – Local application of RSVL during the early stages to orthopedically expanded inter-premaxillary suture area may stimulate bone formation and shorten the retention period, in rats Daha fazlası Daha az

Relationship between odontogenic bacteremia and orthodontic stripping


Makale | 2013 | American Journal of Orthodontics and Dentofacial Orthopedics

Introduction: The aim of this study was to evaluate the prevalence of bacteremia associated with an orthodontic stripping procedure. Methods: The study included 29 orthodontic patients (mean age, 18.2 6 3.4 years). We used a standardized stripping procedure: a perforated stripping disk with a contra-angle hand piece was used at a low speed (\15,000 rpm; 10 seconds) on the mandibular anterior teeth. Blood samples were collected by inserting a cannula into the left antecubital fossa. A baseline sample was taken before treatment, and a second sample was taken after the stripping procedure. These samples were inoculated into aerobi . . .c and anaerobic blood culture bottles and incubated, and the bacterial cultures were identified; the samples collected before and after the stripping procedure were statistically analyzed. Results: Transient bacteremia was not detected in any pretreatment blood sample, but it was found in 1 postoperative blood sample; this sample tested positive for Streptococcus sanguis. Conclusions: The bacterial species in the positive postoperative blood sample was S sanguis, which might be associated with infective endocarditis. Clinicians should explain the level of risk to the patient and consult a concerned medical specialist Daha fazlası Daha az

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