- Eklemek veya çıkarmak istediğiniz kriterleriniz için 'Dahil' / 'Hariç' seçeneğini kullanabilirsiniz. Sorgu satırları birbirine 'VE' bağlacı ile bağlıdır. - İptal tuşuna basarak normal aramaya dönebilirsiniz.
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
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
The aim of this experimental study was to evaluate
the effects of light-emitting diode-mediated-photobiomodulation
therapy (LPT), on the rate of orthodontic tooth movement (TM)
and orthodontically induced root resorption, in rats. Twentymale
12-week-oldWistar rats were separated into two groups (control
and LPT) and 50 cN of force was applied between maxillary left
molar and incisor with a coil spring. In the treatment group, LPT
was applied with an energy density of 20 mW/cm2 over a period
of 10 consecutive days directly over the movement of the first
molar teeth area. The distance between the teeth was measured
with a di . . .gital caliper on days 0 (T0), 10 (T1), and 21 (T2) on
dental cast models. The surface area of root resorption lacunae
was measured histomorphometrically using digital photomicrographs.
Mann–Whitney U and Wilcoxon tests were used for
statistical evaluation at p
Objectives: The aim of this study was to evaluate differences in craniofacial morphology,
head posture and hyoid bone position between mouth breathing (MB) and nasal breathing
Methods: Mouth breathing patients comprised 34 skeletal Class I subjects with a mean age of
12.8 ± 1.5 years (range: 12.0–15.2 years). Thirty-two subjects with skeletal Class I relationship were
included in the NB group (mean 13.5 ±1.3 years; range: 12.2–14.8 years). Twenty-seven measurements
(15 angular and 12 linear) were used for the craniofacial analysis. Additionally, 12 measurements
were evaluated for head posture (eight measurement . . .s) and hyoid bone position (four
measurements). Student’s t-test was used for the statistical analysis. Probability values
The aim of this follow-up study was to evaluate the effects of Pre-Orthodontic Trainer (POT) appliance on the anterior temporal, mental, orbicularis oris, and masseter muscles through electromyography (EMG) evaluations in subjects with Class II division 1 malocclusion and incompetent lips. Twenty patients (mean age: 9.8 ± 2.2 years) with a Class II division 1 malocclusion were treated with POT (Myofunctional Research Co., Queensland, Australia). A group of 15 subjects (mean age: 9.2 ± 0.9 years) with untreated Class II division 1 malocclusions was used as a control. EMG recordings of treatment group were taken at the beginning and a . . .t the end of the POT therapy (mean treatment period: 7.43 ± 1.06 months). Follow-up records of the control group were taken after 8 months of the first records. Recordings were taken during different oral functions: clenching, sucking, and swallowing. Statistical analyses were undertaken with Wilcoxon and Mann–Whitney U-tests. During the POT treatment, activity of anterior temporal, mental, and masseter muscles was decreased and orbicularis oris activity was increased during clenching and these differences were found statistically significant when compared to control. Orbicularis oris activity during sucking was increased in the treatment group (P < 0.05). In the control group, significant changes were determined for anterior temporal (P < 0.05) and masseter (P < 0.01) muscle at clenching and orbicularis oris (P < 0.05) muscle at swallowing during observation period. Present findings indicated that treatment with POT appliance showed a positive influence on the masticatory and perioral musculature
Objective: To identify the effect of rapid maxillary expansion (RME) procedure on dynamic
measurement of natural head position (NHP).
Materials and Methods: The treatment group comprised 23 patients, 12 girls and 11 boys (mean
age: 10.1 6 1.1 years), and the control group comprised 15 subjects, 8 girls and 7 boys (mean age:
9.7 6 1.4 years). The test subjects underwent RME treatment using full cap acrylic device, and the
mean amount of expansion was 5.48 mm. An inclinometer and a portable data logger were used to
collect the NHP data. Intragroup changes were evaluated by using nonparametric Wilcoxon test,
and intergroup chang . . .es were analyzed with Mann-Whitney U-test. P values less than .05 were
considered statistically significant.
Results: The mean difference between initial and final NHP was 0.31u, and this difference was not
statistically significant. Also, there were no statistically significant differences between the RME
and control groups before and after treatment.
Conclusion: Treatment with the RME procedure showed no statistically significant effects on
dynamic measurement of NHP when compared with initial values or untreated control
To evaluate the shear bond strength (SBS), fracture mode, wire pull out (WPO) resistance and microleakage between low-shrinking and conventional composites used as a lingual retainer adhesive. Methods: A total of 120 human mandibular incisor teeth, extracted for periodontal reasons, were collected. Sixty of them were separated into two groups. To determine the SBS, either Transbond-LR (3M-Unitek) or Silorane (3M-Espe) was applied to the lingual surface of the teeth by packing the material into standard cylindrical plastic matrices (Ultradent) to simulate the lingual retainer bonding area. To test WPO resistance, 20 samples were prep . . .ared for each composite where the wire was embedded in the composite materialand cured. Then tensile stress was applied until failure of the composite occurred. The remaining 60 teeth were divided into two groups and multi-stranded 0.0215-inch diameter wire was bonded with the same composites. Microleakage was evaluated by the dye penetration method. Statistical analyses were performed by Wilcoxon, Pearson chi-square, and Mann-Whitney-U tests at p > 0.05 level. Results: The SBS and WPO results were not statistically significant between the two groups. Significant differences were found between the groups in terms of fracture mode (p > 0.001). Greater percentages of the fractures showed mix type failure (85%) for Silorane and adhesive (60%) for Transbond-LR. Microleakage values were lower in low-shrinking composite than the control and this difference was found to be statistically significant (p > 0.001). Conclusions: Low-shrinking composite produced sufficient SBS, WPO and micro-leakage values on the etched enamel surfaces, when used as a lingual retainer composite
The aim of this prospective experimental study was to evaluate the effect of light-emitting diode (LED) photobiomodulation therapy (LPT) on the stability of immediately loaded miniscrews under different force levels, as assessed by resonance frequency analysis (RFA). Sixty titanium orthodontic miniscrews with a length of 8 mm and a diameter of 1.4 mm were implanted into cortical bone by closed flap technique in each proximal tibia of 15 New Zealand white adult male rabbits (n = 30). The animals were randomly divided into irradiated and control groups under different force levels (0, 150, and 300 cN). OsseoPulse® LED device (Biolux R . . .esearch Ltd.) 618 nm wavelength and 20 mW/cm2 output power irradiation (20 minutes/day) was applied to the miniscrews for 10 days. The RFA records were performed at miniscrew insertion session (T1) and 21 days after surgery (T2). Wilcoxon and Mann–Whitney U-tests were used for statistical evaluation at P < 0.005 level.
It was found that initial primer stability of all miniscrews was similar in all groups at the start of the experimental procedure. Statistically significant differences were found for changes in implant stability quotient (ISQ) values between LED-photobiomodulated group and the control (0 cN, P = 0.001; 150 cN, P < 0.001; and 300 cN, P < 0.001). Significant increase was found in ISQ values of LPT applied miniscrews under 0 cN (+11.63 ISQ), 150 cN (+10.50 ISQ), and 300 cN (+7.00 ISQ) force during observation period. By the increase of force levels, it was determined that ISQ values decreased in non-irradiated control miniscrews. Within the limits of this in vivo study, the present RFA findings suggest that LPT might have a favourable effect on healing and attachment of titanium orthodontic miniscrews
The aim of this study was to compare the transverse dimensions of the dental arches
and alveolar arches in the canine, premolar, and molar regions of Class II division 1 and Class II
division 2 malocclusion groups with normal occlusion subjects. This study was performed using
measurements on dental casts of 150 normal occlusion (mean age: 21.6 6 2.6 years), 106 Class
II division 1 (mean age: 17.2 6 2.4 years), and 108 Class II division 2 (mean age: 18.5 6 2.9
years) malocclusion subjects. Independent-samples t-test was applied for comparisons of the
groups. These findings indicate that the maxillary interpremolar width, maxill . . .ary canine, premolar
and molar alveolar widths, and mandibular premolar and molar alveolar widths were significantly
narrower in subjects with Class II division 1 malocclusion than in the normal occlusion sample.
The maxillary interpremolar width, canine and premolar alveolar widths, and all mandibular alveolar
widths were significantly narrower in the Class II division 2 group than in the normal occlusion
sample. The mandibular intercanine and interpremolar widths were narrower and the maxillary
intermolar width measurement was larger in the Class II division 2 subjects when compared with
the Class II division 1 subjects. Maxillary molar teeth in subjects with Class II division 1 malocclusions
tend to incline to the buccal to compensate the insufficient alveolar base. For that reason,
rapid maxillary expansion rather than slow expansion may be considered before or during the
treatment of Class II division 1 patients
Objective: To study and compare the effects of different demineralizationinhibition
methods on the shear bond strength (SBS) and fracture mode of an
adhesive used to bond orthodontic brackets to demineralized enamel surfaces.
Methods: Eighty freshly extracted, human maxillary premolars were divided
into 4 equal groups and demineralized over the course of 21 days. Brackets were
bonded to the demineralized enamel of teeth in Group 1. In Group 2, bonding
was performed following resin infi ltration (ICON®, DMG, Hamburg, Germany).
Before bonding, pre-treatment with acidulated phosphate fluoride (APF) or
solutions containing casei . . .n phosphopeptide-amorphous calcium phosphate
with 2% neutral sodium fluoride (CPP-ACP/wF) was performed in Groups 3
and 4, respectively. Th e SBS values of the brackets were measured and recorded
following mechanical shearing of the bracket from the tooth surface. Th e adhesive
remnant index (ARI) scores were determined aft er the brackets failed. Statistical
comparisons were performed using one-way ANOVA, Tukey’s post-tests, and
G-tests. Results: Significant differences were found in some of the intergroup
comparisons of the SBS values (F = 39.287, p < 0.001). No signifi cant diff erences
were found between the values for the APF-gel and control groups, whereas
signifi cantly higher SBS values were recorded for the resin-infi ltrated and CPPACP/
wF-treated groups. Th e ARI scores were also signifi cantly diff erent among
the 4 groups (p < 0.001). Conclusions: Tooth surfaces exposed to resin infi ltration
and CPP-ACP/wF application showed higher debonding forces than the untreated,
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
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
İzmir Katip Çelebi Üniversitesi, akademisyen ve lisansüstü öğrencilerinin iç ve dış paydaşlarla birlikte ürettikleri bilimsel çalışmalarını, Akademik Açık Arşivi'nde dijital olarak yayınlayarak, ülke ve dünya genelinde bilim topluluğuna açık erişim sağlamaktadır.
Akademik Açık Arşivi'nde bulunan tüm kaynaklar, telif haklarına saygı gösterilerek ve açık erişim ilkeleri doğrultusunda yayınlanmaktadır.
İzmir Katip Çelebi Üniversitesi, bilimsel bilgiye erişimi kolaylaştırarak, araştırma sonuçlarını ve bilimsel yayınları geniş bir kitleye sunarak bilimsel gelişmelere katkıda bulunmayı amaçlamaktadır.
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