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Comparison of Shear Bond Strengths of Ceramic Brackets Using Either Self-etching Primer or Conventional Method After Intracoronal Bleaching

Çakmak, Fethiye | Koçak, Sibel | Koçak, Mustafa Murat | Elekdağ-Türk, Selma | Türk, Tamer

Article | 2015 | TURKISH JOURNAL OF ORTHODONTICS28 ( 2 ) , pp.48 - 54

Objective: To evaluate initial shear bond strengths (SBSs) of ceramic brackets using either a self-etching primer (SEP) or the conventional method (CM) after intracoronal bleaching with sodium perborate and distilled water. Materials and Method: Eighty human incisors were divided into 4 groups according to bleaching and bonding procedures: group 1, bleaching was not applied and brackets were bonded with SEP; group 2, bleaching was not applied and brackets were bonded with the CM; group 3, intracoronal bleaching with sodium perborate was applied for 3 weeks and brackets were bonded with SEP; group 4, intracoronal bleaching with sodiu . . .m perborate was applied for 3 weeks and brackets were bonded with the CM. The SEP (Transbond Plus) was applied as recommended by the manufacturer. After SEP application, ceramic brackets were bonded with light cure adhesive (Transbond XT). For the CM, the teeth were etched with 37% phosphoric acid. After etching, a thin uniform coat of primer (Transbond XT Primer) was applied and ceramic brackets were bonded with light cure adhesive (Transbond XT). The SBSs were measured after water storage for 30 days, after 1000 cycles of thermocycling between 5 degrees C and 55 degrees C. Bond failure location was determined with the adhesive remnant index (ARI). Results: For the SEP method, there was no significant difference between the SBS values of the bleaching and nonbleaching groups. Furthermore, for the CM, the SBS value of the nonbleaching group was not significantly different from that of the bleaching group. The SBS values of the SEP method presented significant differences from the SBS values of the CM (p < 0.001). The SBS values of the SEP application decreased with and without bleaching. ARI scores did not show any significant difference between the groups (p = 0.174). Conclusion: Intracoronal bleaching with sodium perborate and distilled water did not affect the SBS values of ceramic brackets Daha fazlası Daha az

Mineral trioksit agregat'ın biyouyumluluğunun değerlendirilmesi

Koçak, Sibel | Erten, Hülya

Article | 2012 | Gazi Üniversitesi Diş Hekimliği Fakültesi Dergisi (.Acta Odontologica Turcica)29 ( 1 ) , pp.63 - 71

Mineral trioksit agregat (MTA), kök ucu dolgusu, pulpa kaplaması, perforasyon tamiri ve diğer endodontik yaklaşımlarda yaygın olarak kullanılmaktadır. MTA'nın biyouyumluluğu çok çeşitli yollarla; hücre baskılanması ve büyümesi, in vivo olarak cilt altı ve kemik içi implantasyon ve dental dokularla direkt temas yöntemleriyle araştırılmıştır. Bu derlemenin amacı, MTA'nın biyouyumluluğu hakkındaki genel bilgileri güncellemektir. Mineral trioxide aggregate (MTA) is widely used for root-end fillings, pulp capping, perforation repairs, and other endodontic procedures. The biocompatibility of MTA has been investigated in a number of ways, . . .using cell expression and growth, subcutaneous and intra-osseous implantation and direct contact with dental tissues in vivo. The aim of this review is to update the general knowledge about the MTA biocompatibility Daha fazlası Daha az

When do skeletal class III patients wear their reverse pull headgears?

Özkalaycı, Nurhat | Çiçek, Orhan

Article | 2017 | BioMed Research International2017 , pp.63 - 71

Objective. The aim of this study is to evaluate the factors that affect wearing time and patient behavior during reverse pull headgear therapy with a newly designed reverse pull headgear. Methods. In clinical practice, new reverse pull headgears were applied to fifteen patients. The patients were monitored during reverse pull headgear therapy and the data were evaluated. Statistical analysis was made. Results. During the study, patients were monitored successfully and the evaluations showed that patients wear the new reverse pull headgears mostly at night. There are differences between days of week and hours of day. Weekends are mor . . .e popular than weekdays for wearing reverse pull headgear. Conclusions. This new type of reverse pull headgears can be used successfully in clinical practice and can help the clinician. Study showed that the most important factor that affects the cooperation of reverse pull headgear patient is aesthetic appearance. © 2017 Nurhat Ozkalayci and Orhan Cicek Daha fazlası Daha az

New design for an adjustable cise space maintainer

Özkalaycı, Nurhat | Yetmez, Mehmet

Article | 2018 | BioMed Research International2018 , pp.63 - 71

Objective. The aim of this study is to present a new adjustable Cise space maintainer for preventive orthodontic applications. Methods. Stainless steel based new design consists of six main components. In order to understand the major displacement and stress fields, structural analysis for the design is considered by using finite element method. Results. Similar to major displacement at y-axis, critical stresses ?x and ?xy possess a linear distribution with constant increasing. Additionally, strain energy density (SED) plays an important role to determine critical biting load capacity. Conclusion. Structural analysis shows that the . . .space maintainer is stable and is used for maintaining and/or regaining the space which arouses early loss of molar tooth. © 2018 Nurhat Ozkalayci and Mehmet Yetmez Daha fazlası Daha az

A new orthodontic appliance with a mini screw for upper molar distalization

Özkalaycı, Nurhat | Yetmez, Mehmet

Article | 2016 | Applied Bionics and Biomechanics2016 , pp.63 - 71

The aim of this study is to present a new upper molar distalization appliance called Cise distalizer designed as intraoral device supported with orthodontic mini screw for upper permanent molar distalization. The new appliance consists of eight main components. In order to understand the optimum force level, the appliance under static loading is tested by using strain gage measurement techniques. Results show that one of the open coils produces approximately 300 gr distalization force. Cise distalizer can provide totally 600 gr distalization force. This range of force level is enough for distalization of upper first and second molar . . . teeth. © 2016 Nurhat Ozkalayci and Mehmet Yetmez Daha fazlası Daha az

Silver nanoparticle incorporation effect on mechanical and ther at properties of denture base acrylic resins

Köroğlu, Ayşegül | Şahin, Onur | Kürkçüoğlu, Işın | Dede, Doğu Ömür | Özdemir, Tonguc | Hazer, Baki

Article | 2016 | JOURNAL OF APPLIED ORAL SCIENCE24 ( 6 ) , pp.590 - 596

Objective: The aim of the present study was to evaluate the mechanical and thermal characteristics of two denture base acrylic resins containing silver nanoparticles (AgNPs). Material and Methods: Two different acrylic denture base resins (heat-polymerized and microwave polymerized) containing 0.3, 0.8 and 1.6 wt% AgNPs were evaluated for flexural strength, elastic modulus and impact strength. The glass transition temperature (Tg) and relative heat capacity (Cp) of the samples were determined from the Differential Scanning Calorimetry (DSC) results. For statistical analysis, two-way ANOVA and Tukey-HSD tests were performed. Results: . . . Addition of 0.8% and 1.6% AgNPs in microwave polymerized resin significantly decreased the transverse strength and elastic modulus. In terms of impact strength, the addition of AgNPs has no effect on both resin groups. Glass transition temperature (Tg) was decreased with the addition of AgNPs for both denture base resins. Conclusions: The incorporation of AgNPs, generally used for antimicrobial efficiency, affected the transverse strength of the denture base acrylic resins depending on the concentration of nanoparticles. Tg was decreased with the addition of AgNPs for both denture base resins Daha fazlası Daha az

Treatment of unilateral buccal crossbite with mandibular symphyseal distraction osteogenesis

Özkalaycı, Nurhat | Özer, Mete | Sümer, Mahmut

Article | 2011 | Korean Journal of Orthodontics41 ( 1 ) , pp.59 - 69

The aim of this report is to present the treatment of a 14-year-old boy with scissors-bite. Mandibular sym-physeal distraction osteogenesis (MSDO) with tooth-supported distractor was performed to expand the mandible, and intermaxillary cross elastics were used. The mandible was expanded approximately 9 mm. Asymmetric widening was done by using cross elastics and MSDO simultaneously. The buccal crossbite was corrected successfully. After a 2-year observation period, widening of the mandible using this procedure was judged to be stable.

Comparison of nd:yag and diode laser irradiation during intracoronal bleaching with sodium perborate: color and raman spectroscopy analysis

Sağlam, Baran Can | Koçak, Mustafa Murat | Koçak, Sibel | Türker, Sevinç Aktemur | Arslan, Dilara

Article | 2015 | PHOTOMEDICINE AND LASER SURGERY33 ( 2 ) , pp.77 - 81

Objective: The aim of this study was to evaluate the color and enamel structure changes after intracoronal bleaching with sodium perborate under neodymium:yttrium-aluminum-garnet (Nd:YAG) and diode laser irradiation. Background data: Although some studies investigated the efficacy of laser irradiation during intracoronal bleaching, no study has been conducted to investigate the changes in both color and enamel structure during intracoronal bleaching with laser irradiation. Methods: Thirty-six extracted mandibular incisors were used. The root canals were prepared and filled with AH Plus and gutta-percha. Baseline color values and Ram . . .an spectra were obtained from all samples. The samples were randomly divided into three groups as follows: group 1, intracoronal bleaching with sodium perborate plus NdYAG laser irradiation; group 2, intracoronal bleaching with sodium perborate plus diode laser irradiation; and group 3, intracoronal bleaching with sodium perborate without any laser irradiation. Following the bleaching procedures, the final baseline color values and Raman spectra were obtained. The baseline and final values were statistically analyzed. Statistical analyses were performed with SPSS 18.0 software using Anova and the Kruskal-Wallis test. Results: There was a significant difference between the Nd:YAG laser and control groups (p0.05). Conclusions: Laser application, especially Nd:YAG laser irradiation, was able to increase the efficacy of intracoronal bleaching with sodium perborate. Laser irradiation significantly increased the bleaching efficacy without any changes in the enamel surface structure Daha fazlası Daha az

A new appliance for improving the miniscrew stability

Özkalaycı, Nurhat | Yetmez, Mehmet

Article | 2016 | Advances in Materials Science and Engineering2016 , pp.77 - 81

The aim of this study is to present a new appliance called stability leg designed as an additional anchorage providing device for increasing primary stability of orthodontic miniscrew. For this purpose, two finite element models (FEMs) with two different cortical layer thicknesses of 1 mm and 2 mm are considered. In order to achieve the stability analysis, these two main models, namely, Model I and Model II, are divided into subgroups according to stability leg lengths. Two types of forces are considered. (1) First force is a constant force of 1 N which is applied to all two models. (2) Second force is defined in the range of 1-4 N. . . . Each of 1, 2.5, and 4 N of the second force is applied with a position angle ranging from 34° to 44°. Results show that stability of a miniscrew with 5 mm leg increases primary stability of the miniscrew. © 2016 Nurhat Ozkalayci and Mehmet Yetmez Daha fazlası Daha az

Comparison of the shear bond strengths of ceramic brackets using either a self-etching primer or the conventional method after intracoronal bleaching

Türk, Tamer | Elekdağ-Türk, Selma | Koçak, Mustafa Murat | Koçak, Sibel | Özlü, Fethiye Çakmak

Article | 2015 | Turkish Journal of Orthodontics28 ( 3 ) , pp.77 - 81

Objective: To evaluate the initial shear bond strengths (SBSs) of ceramic brackets using either a self-etching primer (SEP) or the conventional method (CM) after intracoronal bleaching with sodium perborate and distilled water. Methods: Eighty human incisors were divided into four groups according to bleaching and bonding procedures: Group 1, bleaching was not applied and the brackets were bonded with a self-etching primer; Group 2, bleaching was not applied and the brackets were bonded with the conventional method; Group 3, intracoronal bleaching with sodium perborate was applied for three weeks and the brackets were bonded with a . . .self-etching primer; and Group 4, intracoronal bleaching with sodium perborate was applied for three weeks and the brackets were bonded with the conventional method. A self-etching primer (Transbond Plus) was applied as recommended by the manufacturer. After SEP application, the ceramic brackets were bonded with a light-curing adhesive (Transbond XT). For the conventional method, the teeth were etched with 37% phosphoric acid. After etching, a thin uniform coat of primer (Transbond XT Primer) was applied and the ceramic brackets were bonded with a light-curing adhesive (Transbond XT). SBSs were measured after water storage for 30 days, after 1000 cycles of thermocycling between 5°C and 55°C. Bond failure location was determined with the Adhesive Remnant Index (ARI).Results: For the SEP method, there was no significant difference between SBS values of the bleaching and non-bleaching groups. Furthermore, for the conventional method, the SBS value of the non-bleaching group was not significantly different from that of the bleaching group. SBS values of the SEP method presented significant differences from those of the conventional method ( Daha fazlası Daha az

Periapical health related to the quality of coronal restorations and root fillings in Turkish population

Koçak, Sibel | Köktürk, Firuzan | Sağlam, Can | Koçak, Mustafa Murat

Article | 2013 | Cumhuriyet Dental Journal16 ( 4 ) , pp.261 - 266

Objectives: The aim of the present study was to evaluate the quality of root canal treatments and coronal restorations investigating their influence on the periapical status of endodontically-treated teeth in a Turkish population based on radiographic examination. Materials and Methods: The study included 583 patients referred for routine dental care. A total of 1125 endodontically treated teeth were examined with panoramic radiographs. The quality of root canal fillings and coronal restorations were evaluated according to the criteria determined by Gündüz et al., which were slightly modified from those described by De Moor et al. A . . .pical status was assessed by the Periapical Index (PAI) scores. Results: Out of 1125 endodontically treated teeth, 539 were classified as healthy and 586 as displaying apical periodontitis. Of these 539 subjects, 389 teeth had received quality endodontic treatment. Of 586 teeth with apical periodontitis, 500 had poor endodontic treatment. Four hundred and seventy-five teeth had adequate root canal fillings. Of these teeth, 389 were classified as healthy. Of the 666 teeth with adequate restoration, apical region was classified as healthy for 410 subjects. For the 388 teeth with both adequate coronal restorations and root canal fillings, the success rate was 85.3%. For the 372 teeth with both inadequate coronal restorations and root canal fillings, the success rate was 18.8%. Conclusions: The quality of root fillings in the population living in the back country of Turkey is in general below the acceptable standard and requires substantial improvement. Objectives: The aim of the present study was to evaluate the quality of root canal treatments and coronal restorations investigating their influence on the periapical status of endodontically-treated teeth in a Turkish population based on radiographic examination. Materials and Methods: The study included 583 patients referred for routine dental care. A total of 1125 endodontically treated teeth were examined with panoramic radiographs. The quality of root canal fillings and coronal restorations were evaluated according to the criteria determined by Gündüz et al., which were slightly modified from those described by De Moor et al. Apical status was assessed by the Periapical Index (PAI) scores. Results: Out of 1125 endodontically treated teeth, 539 were classified as healthy and 586 as displaying apical periodontitis. Of these 539 subjects, 389 teeth had received quality endodontic treatment. Of 586 teeth with apical periodontitis, 500 had poor endodontic treatment. Four hundred and seventy-five teeth had adequate root canal fillings. Of these teeth, 389 were classified as healthy. Of the 666 teeth with adequate restoration, apical region was classified as healthy for 410 subjects. For the 388 teeth with both adequate coronal restorations and root canal fillings, the success rate was 85.3%. For the 372 teeth with both inadequate coronal restorations and root canal fillings, the success rate was 18.8%. Conclusions: The quality of root fillings in the population living in the back country of Turkey is in general below the acceptable standard and requires substantial improvement Daha fazlası Daha az

Effects of disinfection on accuracy of orthodontic stone models

Özkalaycı, Nurhat | Aydın, Hamit

Article | 2017 | Clinical Dentistry and Research41 ( 1 ) , pp.27 - 35

http://www.trdizin.gov.tr/publication/paper/detail/TWpJM05EZ3dNQT09 https://hdl.handle.net/20.500.12628/706

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