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Öğe Alveolar bone changes after asymmetric rapid maxillary expansion(E H ANGLE EDUCATION RESEARCH FOUNDATION, INC, 2015) Akin, Mehmet; Baka, Zeliha Muge; Ileri, Zehra; Basciftci, Faruk AyhanObjective: To quantitatively evaluate the effects of asymmetric rapid maxillary expansion (ARME) on cortical bone thickness and buccal alveolar bone height (BABH), and to determine the formation of dehiscence and fenestration in the alveolar bone surrounding the posterior teeth, using cone-beam computed tomography (CBCT). Materials and Methods: The CBCT records of 23 patients with true unilateral posterior skeletal crossbite (10 boys, 14.06 +/- 1.08 years old, and 13 girls, 13.64 +/- 1.32 years old) who had undergone ARME were selected from our clinic archives. The bonded acrylic ARME appliance, including an occlusal stopper, was used on all patients. CBCT records had been taken before ARME (T1) and after the 3-month retention period (T2). Axial slices of the CBCT images at 3 vertical levels were used to evaluate the buccal and palatal aspects of the canines, first and second premolars, and first molars. Paired samples and independent sample t-tests were used for statistical comparison. Results: The results suggest that buccal cortical bone thickness of the affected side was significantly more affected by the expansion than was the unaffected side (P < .05). ARME significantly reduced the BABH of the canines (P < .01) and the first and second premolars (P < .05) on the affected side. ARME also increased the incidence of dehiscence and fenestration on the affected side. Conclusions: ARME may quantitatively decrease buccal cortical bone thickness and height on the affected side.Öğe Bacteremia after piezocision(MOSBY-ELSEVIER, 2014) Ileri, Zehra; Akin, Mehmet; Erdur, Emire Aybuke; Dagi, Hatice Turk; Findik, DuyguIntroduction: The aim of this study was to investigate the presence of transient bacteremia after a piezocision procedure. Methods: The sample consisted of 30 subjects (24 women, 6 men; mean age, 19.6 +/- 0.7 years; range, 18.1-22.4 years) with the American Society of Anesthesiologists' physical status I. All patients had Class I skeletal and dental relationships and had fixed orthodontic treatment with the Damon system. The piezocision surgery was performed 1 week after the placement of the orthodontic appliances in all patients. Two 20-mL venous blood samples were collected before and 30 to 60 seconds after the first microincision using an aseptic technique. The samples were inoculated into BACTEC Plus aerobic and anaerobic blood culture bottles and were assessed in the BACTEC blood culture analyzer (Becton Dickinson Diagnostic Instrument Systems, Sparks, Md). The results were analyzed statistically using the McNemar test, with P = 0.05 indicating statistical significance. Results: No significant difference between the preoperative and postoperative samples was determined with respect to transient bacteremia (P < 0.250). No bacteremia was detected in the pretreatment samples, although Gemella sanguinis, Streptococcus pluranimalium, and Streptococcus mitis/oralis were detected in 3 postoperative blood samples. Conclusions: The piezocision procedure might be related to transitory bacteremia. Hence, orthodontists should consider the possibility of bacterial endocarditis in at-risk patients when piezocision is part of the treatment plan.Öğe Can demineralized enamel surfaces be bonded safely?(TAYLOR & FRANCIS LTD, 2014) Akin, Mehmet; Baka, Zeliha Muge; Ileri, Zehra; Basciftci, Faruk AyhanObjective. To evaluate and compare the effects of enamel demineralization, microabrasion therapy and casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) application on the shear bond strength (SBS) of orthodontic brackets bonded to enamel surfaces and enamel color. Materials and methods. Eighty freshly extracted human maxillary premolar teeth were allocated to one of the four groups. Brackets were bonded directly to non-demineralized enamel surfaces in Group I (control group), directly to the demineralized enamel surfaces in Group II, to demineralized enamel surfaces after CPP-ACP application in Group III and to demineralized enamel surfaces after microabrasion therapy in Group IV. The samples were stored in water for 24 h at 37 degrees C and then underwent thermocycling. The SBS in megapascals (MPa) was determined by a shear test with 0.5 mm/min crosshead speed and failure types were classified with modified adhesive remnant index scores. The data were analyzed with one-way analyses of variance (ANOVA), Tukey and chi-square tests at the alpha = 0.05 level. Results. Significant differences were found among the four groups (F = 21.57, p < 0.01). No significant difference was found between Group I and III (17.12 +/- 2.84 and 15.08 +/- 3.42 MPa, respectively) or between Group III and IV (12.82 +/- 2.64 MPa). The lowest SBS value was determined in Group II (5.88 +/- 2.12 MPa). Enamel demineralization, microabrasion therapy and CPP-ACP application affected enamel color significantly. Conclusion. CPP-ACP application and microabrasion therapy are able to increase the decreased SBS of orthodontic brackets because of enamel demineralization.Öğe Can white spot lesions be treated effectively?(E H ANGLE EDUCATION RESEARCH FOUNDATION, INC, 2012) Akin, Mehmet; Basciftci, Faruk AyhanObjective: To compare the effects of sodium fluoride mouth rinse, casein phosphopeptide-amorphous calcium phosphate (CPP-ACP), and the microabrasion technique in treating white spot lesions. Materials and Methods: The study population consisted of 80 patients (46 females, 34 males; 966 affected teeth) who had developed multiple decalcified enamel lesions after fixed orthodontic therapy. The study population was divided into four groups of 20 patients each. The control group (group I) participants were to just brush their teeth, the fluoride group (group II) participants were instructed to use 20 ml of neutral 0.025% sodium fluoride rinse, the participants in the CPP-ACP group (group III) were instructed to use tooth mousse twice a day in addition to fluoride toothpaste for 6 months, and the participants in the microabrasion group (group IV) were to undergo treatment by the microabrasion technique, which is a commonly used mixture of 18% hydrochloric acid. Data were analyzed with the generalized linear mixed model and Tukey HSD at the P < .05 level. Results: The area of the white spot lesions decreased significantly in all groups. Inter group differences in the treatment success rates were significant. The highest success rate was observed for group IV (97/0). The success rate of group III (58%) was significantly higher than that of groups II (48%) and I (45%). Conclusions: The use of CPP-ACP can be more beneficial than fluoride rinse for postorthodontic remineralization. Microabrasion is an effective treatment for cosmetic improvement of long-standing white spot lesions. (Angle Orthod. 2012;82:770-775.)Öğe Cone-beam computed tomography evaluation of dentoskeletal changes after asymmetric rapid maxillary expansion(MOSBY-ELSEVIER, 2015) Baka, Zeliha Muge; Akin, Mehmet; Ucar, Faruk Izzet; Ileri, ZehraIntroduction: The aims of this study were to quantitatively evaluate the changes in arch widths and buccolingual inclinations of the posterior teeth after asymmetric rapid maxillary expansion (ARME) and to compare the measurements between the crossbite and the noncrossbite sides with cone-beam computed tomography (CBCT). Methods: From our clinic archives, we selected the CBCT records of 30 patients with unilateral skeletal crossbite (13 boys, 14.2 +/- 1.3 years old; 17 girls, 13.8 +/- 1.3 years old) who underwent ARME treatment. A modified acrylic bonded rapid maxillary expansion appliance including an occlusal locking mechanism was used in all patients. CBCT records had been taken before ARME treatment and after a 3-month retention period. Fourteen angular and 80 linear measurements were taken for the maxilla and the mandible. Frontally clipped CBCT images were used for the evaluation. Paired sample and independent sample t tests were used for statistical comparisons. Results: Comparisons of the before-treatment and after-retention measurements showed that the arch widths and buccolingual inclinations of the posterior teeth increased significantly on the crossbite side of the maxilla and on the noncrossbite side of the mandible (P < 0.05). Comparison of the 2 sides showed statistically significant differences in both the maxilla and the mandible (P < 0.05). Conclusions: After ARME treatment, the crossbite side of the maxilla and the noncrossbite side of the mandible were more affected than were the opposite sides.Öğe Effect of menstrual cycle on orthodontic pain perception A controlled clinical trial(URBAN & VOGEL, 2016) Ileri, Zehra; Baka, Zeliha Muge; Akin, Mehmet; Apiliogullari, Seza; Basciftci, Faruk AyhanThe aim of this prospective, single-center, controlled clinical trial was to evaluate the effects of menstrual cycle phases on orthodontic pain perception. A total of 48 women between 16 and 20 years old with regular menstrual periods who were scheduled to undergo extraction of two upper first premolars for orthodontic treatment were enrolled in this study. Laceback ligatures were used to move canines distally. After activating the laceback ligatures, each patient completed a questionnaire in order to assess pain and quality of life. Pain perception was recorded by patients on a visual analogue scale (VAS) and a verbal rating scale-4 (VRS) immediately after activation (T1) and 24 h after activation (T2). During the appointment, each patient's menstrual-cycle phase (follicular or luteal) was determined by asking some questions about her cycle. For statistical analysis of data, the Mann-Whitney U, independent t test, and Wilcoxon tests were applied. Mean orthodontic pain score was 1.96 +/- 0.80 and 47.08 +/- 21.68 in the follicular phase, 1.92 +/- 0.82 and 46.25 +/- 18.92 in the luteal phase at T1 using the VRS and VAS, respectively. Orthodontic pain scores were worse in those patients in the luteal phase than those in the follicular phase (p < 0.05) in terms of both VRS (p = 0.025) and VAS (p = 0.046). No significant difference between pain scores at T1 and those at T2 in both luteal and follicular phases (p > 0.05) were observed. The menstrual phase has an influence on the perception of orthodontic pain which is higher in the luteal phase following the activation of laceback ligatures. In clinical practice, the phases of the menstrual cycle may have a significant role in how women perceive orthodontic pain.Öğe Effect of Nd:YAG Laser Bleaching and Antioxidizing Agents on the Shear Bond Strength of Brackets(MARY ANN LIEBERT, INC, 2013) Akin, Mehmet; Ozyilmaz, Ozgun Yusuf; Yavuz, Tevfik; Aykent, Filiz; Basciftci, Faruk AyhanObjective:The aims of this study were to evaluate the effect of hydrogen peroxide bleaching agents, both nonactivated and activated by a neodymium:yttrium-aluminum-garnet (Nd:YAG) laser, and of antioxidant treatment on the shear bond strength (SBS) of orthodontic brackets. Background data:Nd:YAG laser activation is expected to accelerate the bleaching therapy without decrease shear bond strength. Materials and methods: Ninety extracted maxillary central incisors were divided into two experimental groups and a control group. Group I was the control group, Group II was bleached with 35% hydrogen peroxide and had no photoactivation, and Group III was bleached with 35% hydrogen peroxide with activation by a Nd:YAG laser (4.0 W, 60 Hz frequency, 1mm distance, 20 sec). Each group was divided into two subgroups:Subgroup A was immersed in artificial saliva for 2 weeks, and then bonded using the total etch system, whereas subgroup B was treated with an antioxidant agent (10% sodium ascorbate) and then bonded using the same system. The samples were stored in water for 24 h at 37 degrees C, and thermocycled. The SBS in megapascals (MPa) was determined by a shear test with 1mm/min crosshead speed, and failure types were classified with modified adhesive remnant index scores. The data were analyzed with two way analyses of variance, Tukey, and chi(2) tests at the alpha = 0.05 level. Results:In both Groups II and III, the SBSs of brackets bonded after bleaching (Group II 15.16, Group III 17.50 MPa) were significantly lower than those of brackets in the bonded unbleached group (Group I 22.13MPa); however, sodium ascorbate treatment significantly increased the SBSs of brackets in the bleached groups (Group II 21.52, Group III 22.43MPa), but had an insignificant effect on the SBS of the control group (Group I 23.66MPa). Conclusions: Hydrogen peroxide bleaching agents reduce the SBSs both with and without Nd:YAG laser activation; however, treatment of the bleached enamel surface with 10% sodium ascorbate prior to bonding negates the effect.Öğe Effects of chincup or facemask therapies on the orofacial airway and hyoid position in Class III subjects(URBAN & VOGEL, 2015) Akin, Mehmet; Ucar, Faruk Izzet; Chousein, Chousein; Sari, ZaferThe purpose of this work was to evaluate orofacial airway dimensions and the position of the hyoid bone related to changes induced by facemask therapy (combined with rapid palatal expansion) or by chincup therapy as compared to an untreated Class III control group. In all, 67 patients with skeletal Class III malocclusion were divided into a facemask group (n = 25; 15 girls and 10 boys), a chincup group (n = 15; 16 girls and 9 boys), and a control group (n = 17; 9 girls and 8 boys). Hard- and soft-tissue parameters were analyzed on lateral cephalograms, which were available for all patients and included a baseline radiograph (T1) obtained before treatment and a follow-up radiograph (T2) taken upon completion of active treatment or, in the control group, after a 6-month interval. Statistical analysis was performed at the p a parts per thousand currency signaEuro parts per thousand 0.05 level and included a paired-sample t-test, a generalized linear mixed model (GLMM), and a post hoc Tukey test. In the chincup group, significant changes in the perpendicular distance from the hyoid (H) to the C3-Me line were found compared to the control group (p < 0.05). The facemask group, by contrast, showed significant anteroposterior width increases of the pharynx-as measured at the level of the soft palate (p < 0.001)-as well as significant area increases of the nasopharynx based on its anterior portion (p < 0.001) and on its total area (p < 0.001). Both the chincup and the facemask (combined with rapid palatal expansion) therapies were found to induce clockwise rotational effects on the mandible. Orofacial airway dimensions were enlarged significantly by facemask treatment in comparison with both chincup treatment and with the control group.Öğe Effects of Different Demineralization-Inhibiting Methods on the Shear Bond Strength of Glass-Ceramics(WILEY, 2015) Dilber, Erhan; Akin, Mehmet; Yavuz, Tevfik; Erdem, AliPurposeThis in vitro study was undertaken to evaluate the effects of different demineralization-inhibiting methods on the shear bond strength (SBS) of glass-ceramics. Materials and MethodsNinety extracted intact human mandibular lateral insicors were randomly divided into six equal groups. Group C was left untreated, while enamel subsurface demineralization was induced in the other groups. In group D, porcelain discs (3 mm in diameter) were cemented to demineralized enamel by using total-etch photopolymerizing luting composite resin without pretreatment. Demineralized specimens in groups F, CA, M, and I were pretreated with fluoride gel, CPP-ACP paste, microabrasion, and resin infiltration, respectively, and then porcelain discs were cemented. SBS (MPa) was calculated from the failure load (N) per bonded area (mm(2)). Fracture types were examined by optical microscopy (40x magnification). Data were analyzed with ANOVA, Tukey's test, and G-test. ResultsANOVA revealed significant intergroup differences (p < 0.01). No significant differences in SBS (MPa) were found between groups C (19.48 2.0) and I (20.02 +/- 1.6). Lower SBS values were recorded in groups D (7.93 +/- 0.8), F (12.51 +/- 1.5), CA (17.08 +/- 1.3), and M (14.84 +/- 1.4). Mixed and cohesive failures were the most prevalent in groups M and I, respectively. ConclusionResin infiltration enhanced the SBS of porcelain discs bonded to demineralized enamel when compared with the other demineralization-inhibiting methods. Clinical Relevance: Resin infiltration could be useful to enhance adhesion of glass-ceramics to teeth with white spot lesions.Öğe Effects of different pre-treatment methods on the shear bond strength of orthodontic brackets to demineralized enamel(TAYLOR & FRANCIS LTD, 2016) Veli, Ilknur; Akin, Mehmet; Baka, Zeliha Muge; Uysal, TancanObjective. To compare the effects of different treatment methods used for the enamel damage, on the shear bond strength (SBS) and fracture mode of orthodontic brackets. Materials and methods. Freshly-extracted 140 premolars were randomly allocated to seven groups: Group I was considered as the control of other groups. The remaining groups were exposed to demineralization. In group II, brackets were directly bonded to the demineralized enamel surface. CPP-ACP paste (GC Tooth Mousse), fluoride varnish (Bifluorid 12), microabrasion with a mixture prepared with 18% hydrochloric acid and fine pumice powder, microabrasion with an agent (Opalustre) and resin infiltrant (Icon (R)) were applied in Groups III, IV, V, VI and VII, respectively. The specimens were tested for SBS and bond failures were scored according to the Adhesive Remnant Index (ARI). Analysis of variance and Tukey tests were used to compare the SBS of the groups. ARI scores were compared with G-test. The statistical significance was set at p < 0.05 level. Results. Statistically significant differences were found among seven groups (F = 191.697; p < 0.001). The SBSs of groups I (mean = 18.8 +/- 2.0 MPa) and VII (mean = 19.1 +/- 1.4 MPa) were significantly higher than the other groups. No statistically significant difference was found between groups IV (mean = 11.5 +/- 1.2 MPa) and V (mean = 12.6 perpendicular to 1.5 MPa). The differences in ARI scores of the groups were statistically significant (p < 0.01). Conclusions. All demineralization treatment methods improve bonding to demineralized enamel. Resin infiltrant application after demineralization showed similar bond strength values as intact enamel.Öğe Effects of remineralization procedures on shear bond strengths of brackets bonded to demineralized enamel surfaces with self-etch systems(E H ANGLE EDUCATION RESEARCH FOUNDATION, INC, 2016) Baka, Zeliha Muge; Akin, Mehmet; Ileri, Zehra; Basciftci, Faruk AyhanObjective: To compare the effects of different remineralization procedures on the surface roughness of teeth, shear bond strengths (SBSs), and Adhesive Remnant Index scores of sel-fetching primer (SEP) used to bond orthodontic brackets to previously treated demineralized enamel surfaces. Materials and Methods: A total of 140 extracted human premolar teeth were randomly divided into seven equal groups. Group I was the control group. A demineralization procedure was performed in the other six groups. A remineralization procedure was performed before bonding by using casein phosphopeptide-amorphous calcium phosphate, fluoride, a microabrasion mixture (18% hydrochloric acid-fine pumice), a microabrasion agent, and resin infiltration in groups III to VII. Brackets were bonded using a self-etching primer/ adhesive system. The specimens were tested for SBS. The roughness and morphology of the enamel surfaces were analyzed using profilometer and scanning electron microscopy. Data were analyzed with analysis of variance, Tukey, and G-tests at the alpha = .05 level. Results: Significant differences were found in the SBS values among the seven groups (F = 32.69, P = .003). The lowest SBS value was found in group II (2.62 +/- 1.46 MPa). No significant differences were found between groups I, III, and VII, between groups III and IV, or between groups V and VI. The differences in the roughness values were statistically significant among the groups (P = .002). Conclusions: Remineralization procedures restore the decreased SBS of orthodontic brackets and decrease surface roughness caused by enamel demineralization. SEPs provide clinically acceptable SBS values for bonding orthodontic brackets to previously treated demineralized enamel surfaces.Öğe Evaluation of Enamel Surface Roughness after Various Finishing Techniques for Debonding of Orthodontic Brackets(AVES PRESS LTD, 2016) Erdur, Emire Aybuke; Akin, Mehmet; Cime, Leyla; Ileri, ZehraObjective: The aim of this study was to evaluate the surface roughness of enamel after debonding with various types of burs. Methods: The buccal surfaces of 20 mandibular incisors for each group of bur were subjected to profilometer analysis, and three parameters of surface irregularity were recorded. After bracket debonding, adhesive remnants were removed by tungsten carbide burs in low-speed, high-speed, and stainbuster settings. The samples were evaluated at pre-treatment (on sound enamel) (T1) and post-treatment (T2) by a profilometer. The specimens were measured twice, and the mean values were recorded. Results: The results were analyzed in intra-group comparisons with paired t-tests and in inter-group comparisons with one-way ANOVA and Tukey's HSD test. All resin removal techniques significantly increased enamel surface roughness (p<0.05). According to one-way ANOVA, there were significant differences in the effect of enamel surface roughness between all methods (p<0.05). The high-speed bur caused the maximum roughness values and the stainbuster bur caused the minimum roughness values in all the parameters (Ra, Rz, and Rq). Conclusion: The three types of burs used for finishing methods revealed significant differences in the enamel surface after debonding. However, the stainbuster bur created smoother surfaces than the other applied methods.Öğe Evaluation of the mandibular volume and correlating variables in patients affected by unilateral and bilateral cleft lip and palate: a cone-beam computed tomography study(SPRINGER HEIDELBERG, 2016) Celikoglu, Mevlut; Ucar, Faruk Izzet; Buyuk, Suleyman Kutalmis; Celik, Salih; Sekerci, Ahmet Ercan; Akin, MehmetThe aims of the present study were to evaluate the mandibular volume in patients affected by unilateral (UCLP) and bilateral cleft lip and palate (BCLP) and to compare the findings with a well-matched normal occlusion sample without cleft. The study sample consisted of 66 patients divided into UCLP (24 patients; mean age, 14.46 +/- 3.24 years), BCLP (17 patients; mean age, 14.28 +/- 2.85 years), and control (25 patients; mean age, 14.40 +/- 2.81 years) groups. The volume of the mandible including the condyle and the roots of the teeth and craniofacial measurements were performed using cone-beam computed tomography and analyzed using the one-way variance analysis and post hoc Tukey's tests. Regression analyses were used to evaluate the relationships of the measurements and the mandibular volume. Patients affected by UCLP and BCLP had similar craniofacial features (p > 0.05), including decreased SNB, Co-A, Co-Gn, Co-Go, and Go-Gn and increased ANB and SN-MP measurements compared to the control group. Both UCLP and BCLP groups had decreased values of mandibular volume compared to the normal occlusion group, while these differences were found to be statistically insignificant (p > 0.05). Co-Go (Beta = 0.420; p = 0.014) and Co-Gn variables (Beta = 0.708; p = 0.045) were positively correlated with mandibular volume, while SNB (Beta = -0.669; p = 0.044) and SN-MP (Beta = -0.358; p = 0.049) variables were negatively correlated (R (2) = 60.3 and p = 0.000). Mandibular volume insignificantly differs in cleft patients (p > 0.05), and the variables of Co-Go, Co-Gn, SNB, and SN-MP significantly correlate with the volume. This article investigates mandibular volume in patients affected by UCLP and BCLP that has never been investigated in the literature. The present study showed that both UCLP and BCLP groups had insignificantly decreased values of mandibular volume compared to the normal occlusion group.Öğe Hybrid Rapid Palatal Expansion With 2 Mini- Screws: A Case Report(2015) Yurttadur, Gizem; Ileri, Zehra; Akin, MehmetA hybrid expander is a newly designed bone-anchored expander consisting of 2 mini-screws and palatal acrylic; it does not coverany teeth. The aim of this case report is to present the treatment of a patient with transversal maxillary deficiency by hybridexpander. An 11.4-year-old female patient came to our clinic complaining about the appearance of her teeth. She had a narrowmaxillary arch, unilateral dental crossbite, anterior dental crowding, and dental Class II canine and molar relationships on bothsides. Two self-tapping mini-screws were placed between the first molar and second premolar on the palate under minimal localanesthesia. After 1 week, this appliance was bonded to the mini-screws with Transbond XT (3M Unitek, Monrovia, CA, USA)resin. The expansion screw was activated twice a day for 1 week and then once a day until the expansion was completed. Afterthe expansion period, the brackets were bonded to the teeth without removing the hybrid expander. Sufficient maxillary expansionhad been achieved without buccal tipping of the posterior teeth, and the midline diastema had closed spontaneously. This newlydesigned hybrid expander was efficient in correcting a transverse maxillary deficiency without any of the side effects found withconventional rapid maxillary expanders. The most important advantage of this appliance is that clinicians can implementexpansion and bonding procedures at the same time. (Turkish J. Orthod. 2015;28:64–70)Öğe Hybrid Rapid Palatal Expansion With 2 Mini-Screws: A Case Report(AVES PRESS LTD, 2015) Yurttadur, Gizem; Ileri, Zehra; Akin, MehmetA hybrid expander is a newly designed bone-anchored expander consisting of 2 mini-screws and palatal acrylic; it does not cover any teeth. The aim of this case report is to present the treatment of a patient with transversal maxillary deficiency by hybrid expander. An 11.4-year-old female patient came to our clinic complaining about the appearance of her teeth. She had a narrow maxillary arch, unilateral dental crossbite, anterior dental crowding, and dental Class II canine and molar relationships on both sides. Two self-tapping mini-screws were placed between the first molar and second premolar on the palate under minimal local anesthesia. After 1 week, this appliance was bonded to the mini-screws with Transbond XT (3M Unitek, Monrovia, CA, USA) resin. The expansion screw was activated twice a day for 1 week and then once a day until the expansion was completed. After the expansion period, the brackets were bonded to the teeth without removing the hybrid expander. Sufficient maxillary expansion had been achieved without buccal tipping of the posterior teeth, and the midline diastema had closed spontaneously. This newly designed hybrid expander was efficient in correcting a transverse maxillary deficiency without any of the side effects found with conventional rapid maxillary expanders. The most important advantage of this appliance is that clinicians can implement expansion and bonding procedures at the same time.Öğe Incidence of white spot lesions among patients treated with self- and conventional ligation systems(SPRINGER HEIDELBERG, 2015) Akin, Mehmet; Tezcan, Mucella; Ileri, Zehra; Ayhan, FarukObjectives The aim of this study was to investigate the incidence of white spot lesions (WSLs) and its relationship with various patient and treatment variables, in patients treated with self-ligation and conventional ligation orthodontic bracket systems. Methods Two-hundred randomly selected patient records (136 female, 64 male) for self-ligation and (108 female, 92 male) for conventional ligation groups were examined to determine WSL development. In the self-ligation group, Da-mon 3MX (Ormco, Glendora, Calif) brackets had been used, and in the conventional ligation group, Equilibrium 2 (Dentaurum, Phorzeim, Germany) had been used. Labial surfaces of 24 teeth in the pre-and post-treatment photographic records were scored using the WSL index. Results The prevalence of patients who developed at least 1 WSL before treatment was 19%, whereas after treatment, it was 49% in the self-ligation and 54% in the conventional ligation groups. Before treatment, the patients had only mild WSL, but after treatment, severe WSL and cavitation were observed in both groups. Bracket type, age, and hygiene care were significantly associated with new WSL development (P=0.008, P=0.004, P=0.013, respectively). Conclusion Bracket type and more importantly, the hygiene care therapy provided appeared to influence the development of new WSLs. Ligation can promote plaque accumulation and thereby new WSL development in conventional bracket systems. Clinical relevance This article investigates the incidence of WSLs in patients treated with self-ligation and conventional ligation. The present study showed that incidence of WSL less in the self-ligation than in the conventional ligation but hygiene care was mostly important factor in developed WSL.Öğe Long-term stability of dentoalveolar, skeletal, and soft tissue changes after non-extraction treatment with a self-ligating system(KOREAN ASSOC ORTHODONTISTS, 2014) Baseiftci, Faruk Ayhan; Akin, Mehmet; Ileri, Zebra; Bayram, SinemObjective: To evaluate the long-term effects of self-ligating brackets.(SLBs) on transverse dimensions of arches and skeletal and soft tissues and to quantitatively evaluate the treatment outcome after non-extraction treatment with SLBs. Methods: The sample consisted of 24 (18 female and six male) subjects, with a mean age of 14.23 +/- 2.19 years, who received treatment with the Damon (R) 3 appliances. Complete records including cephalometric radiographs and plaster models were obtained before treatment (T1), immediately after treatment (T2), six months after treatment (T3), and two years (T4) after treatment. Digital study models were generated. Twenty lateral cephalometric, six frontal cephalometric, and eight dental cast measurements were examined. The Peer Assessment Rating index was used to measure the treatment outcome. The Wilcoxon test was applied for statistical analysis of the changes. Results: There were significant increases in all transverse dental cast measurements with active treatment. There was some significant relapse in the long term, particularly in maxillary width (p < 0.05). Statistically significant increases were found in nasal (p < 0.001), maxillary base, upper molar, lower intercanine, and antigonial (p < 0.05) widths in T1-T2. Lower incisors were proclined and protruded in T1-T2. Conclusions: SLBs correct crowding by mechanisms involving incisor proclination and protrusion and expansion of the dental arches, without induction of clinically significant changes in hard and soft tissues of the face.Öğe Shear bond strength of a self-adhering flowable composite when used for lingual retainer bonding(URBAN & VOGEL, 2014) Veli, Ilknur; Akin, Mehmet; Kucukyilmaz, Ebru; Uysal, TancanThe goal of this work was to assess the shear bond strength (SBS) and fracture mode of a self-adhering flowable composite when used after thermocycling for lingual retainer bonding. A total of 80 human mandibular incisor teeth were categorized into four equal groups: group 1: Vertise (TM) Flow (VF) without acid etching; group 2: VF with acid etching; group 3: VF with a self-etching bonding agent accompanied by an additional acid etching; group 4: Transbond LR control. Either VF or Transbond LR was applied to the lingual surface of the teeth by packing the material into cylindrical plastic matrices to simulate the lingual retainer bonding area. After all teeth were thermocycled (5000 cycles, 5 and 55 A degrees C), fracture modes were examined under x20 magnification. The SBS data were assessed via analysis of variance (ANOVA) and Tukey's tests. Fracture modes were analyzed by the chi(2) test at a significance level of 0.05. Statistically significant differences in SBS values between groups (p < 0.001) were observed. Group 4 exhibited the highest (14.63 +/- 1.36 MPa) and group 1 the lowest SBS (2.67 +/- 1.35 MPa) values. Statistically significant differences were noted in fracture modes between groups 1, 3, and 4 (p < 0.001). In all the self-adhering flowable composite groups, the adhesive type (tooth-composite interface) fracture occurred more frequently than cohesive and mixed-type fractures. When applied to bond lingual retainers to unetched enamel or with self-etching bonding agent accompanied by an additional acid etching, Vertise (TM) Flow resulted in a significant decrease in bond strength.Öğe Shear-bond-strength of orthodontic brackets to aged nano-hybrid composite-resin surfaces using different surface preparation(JAPANESE SOC DENTAL MATERIALS DEVICES, 2015) Demirtas, Hatice Kubra; Akin, Mehmet; Ileri, Zehra; Basciftci, Faruk AyhanThe aim of this study was to evaluate the effects of different surface preparation methods on the shear bond strength (SBS) of orthodontic metal brackets to aged nano-hybrid resin composite surfaces in vitro. A total of 100 restorative composite resin discs, 6 mm in diameter and :3 mm thick, were obtained and treated with an ageing procedure. After ageing, the samples were randomly divided as follows according to surface preparation methods: (1)Control, (2)37% phosphoric acid gel, (3)Sandblasting, (4)Diamond bur, (5)Air-flow and 20 central incisor teeth were used for the control etched group. SBS test were applied on bonded metal brackets to all samples. SBS values and residual adhesives were evaluated. Analysis of variance showed a significant difference (p<0.001) between the groups. Sandblasted group had the highest SBS value (12.85 MPa) in experimental groups. The sandblasting surface treatment is recommended as an effective method of bonding orthodontic metal brackets to nano-hybrid composite resin surfaces.
