Shear Bond Strength and Temperature Rise of Orthodontic Brackets Bonding by Using a New 3-Second LED Mode

Objective:The aim of this study was to evaluate the effects of different curing times of a light-emitting diode (LED) on the bond strength of stainless steel brackets and to evaluate the temperature changes in the pulp chamber during curing of the composite.Materials and Method:Caries-free human first premolar and maxillary central incisor teeth extracted for orthodontic and periodontal reasons were used. For the temperature-measurement test, 60 incisor teeth were randomly divided into 3 groups (n=20), and 60 premolar teeth were used in 3 groups (n=20) for shear bond strength (SBS) testing. Three light sources—quartz tungsten halogen, LED, and LED in Xtra Power Quadrant mode—were used for polymerization of Transbond XT. Temperature variations were recorded by J-type thermocouple. For SBS testing, a universal testing machine was used. Statistical analyses were performed by χ2, ANOVA, and Holm-Sidak tests at p < 0.05 level.Results:The results of the SBS test revealed no statistically significant (p=0.305) differences between the halogen and LED groups. The conventional halogen light resulted in significantly (p<0.01) higher intrapulpal temperature changes.Conclusions:This study showed that high-intensity curing devices (3-seconds mode) can safely be used in bonding orthodontic brackets to teeth without causing a harmful effect on the dental pulp

Condylar Asymmetry in Patients with Unilateral Mandibular Second Premolar Agenesis

Aim:To investigate the condylar and ramal vertical asymmetry in patients with unilateral mandibular second premolar agenesis.Subjects and Methods:Study group included 58 patients (25 female, 33 males) with unilateral mandibular second premolar agenesis and a control group of 57 patients (41 females, 16 males); both with Class I skeletal and dental relationship. Condylar, ramal, and condylar plus ramal heights were computed in both side and compared by means of paired t-test. Additionally, the asymmetry indices in the study and control groups were compared by means of the Student's t-test.Results:No statistically significant sex difference was found for any of the asymmetry indices and thus the data for males and females were pooled for statistical analyses. According to the side comparison, the condylar, ramal, and condylar plus ramal heights were smaller in the agenesis side than in the normal side for the study group. However, this difference was not statistically significant. Regarding to the asymmetry indices, the patients with unilateral mandibular second premolar agenesis had more asymmetric condyles than did the control group (p < .01).Conclusion:Although condylar, ramal, and condylar plus ramal heights were smaller in the agenesis side than in the normal side for the study group, this difference was not statistically significant

Pediatricians’ knowledge and awareness on pre- surgical orthopedics in Newborns with cleft lip and palate

Aim: The purpose of this study was to determine the level of knowledge and awareness of pediatricians regarding nasoalveolar molding (NAM) and pre-surgical orthopedic treatment of newborns with cleft lip and/or palate (CL/P). Materials and Methods: We conducted a 10-item questionnaire and sent emails to 600 pediatricians in Ordu University. The participants were queried about their title, years in practice, workplace, and knowledge of CL/P and NAM. Results: One-hundred and twelve pediatricians responded to the questionnaire. There was a statistically significant number of pediatricians who had examined newborns with CL/P and knew about NAM therapy (p<0.001). There was a statistically significant difference in knowledge regarding the preoperative treatment of newborns with CL/P between experienced and inexperienced pediatricians (p<0.05). All pediatricians reported referring newborns with CL/P to at least one specialist (orthodontist, dentist, or plastic surgeon). There was a linear regression between the number of cases seen and years of experience. Conclusion: Our results indicate that pediatricians do not have enough knowledge of NAM and its purpose. It is important to increase awareness and knowledge regarding treatment alternatives for patients with CL/P, including NAM and pre-surgical orthopedic treatment

Evaluation of accessing information about Orthodontics: a cross-sectional survey study in Türkiye.

ABSTRACT Background and Aim: Patients use digital platforms to research and learn about various health problems because of ease of information search and communication on the Internet. The aim of this study is to evaluate the resources that patients use to access information about orthodontics. Methods:A questionnaire was created consisting of 13 questions and sent a link to participants. Participants’ age, gender and social media usage level, usage purposes were questioned about orthodontics. The first 2 questions are related to the participant’s personal information (age and gender). The next 3 questions are to investigate the participant’s frequency of Internet use and for what purpose. The next 8 questions inquire about whether the participant uses the Internet for oral health and orthodontics. Results: One thousand twenty participants responded the questionnaire. Six hundred ten of the participants were female and 410 were male. 28.3% of the participants stated that they use the Internet to access social media, 27.2% to do research and 21.9% to follow the news. 76% of participants were active in social media. 43.8% of the participants use the dentist resource to access information about oral health. 29% of the participants reported that they previously used the virtual environment to access orthodontic information. Conclusion: The participants preferred to get information from their relatives and families on orthodontic issues, while they more frequently applied to the dentist to obtain information about oral health. Subjects stated that the most reliable source of information is the dentist

Obstetrician–gynaecologists’ knowledge and awareness on nasoalveolar molding in newborns with cleft lip and palate.

Objective: This study aimed to determine the level of knowledge and awareness of obstetrician–gynecologists (OB-GYNs) about the presurgical orthopedic treatment of newborns with cleft lip and palate (CLP). Methods: We conducted a 12-question survey by email to 532 OB-GYNs who were members of the Turkish Obstetricians and Gynaecologists Association. The participants were asked about their years in practice, region of practice, and knowledge of CLP and nasoalveolar molding (NAM). Results: A total of 141 OB-GYNs agreed to participate and completed the survey. Fifty-nine (42%) of 141 OB-GYNs had never heard of NAM treatment in newborns with CLP. Twenty-seven percent had information about NAM, and 23% referred newborns with CLP for NAM. No statistically significant difference existed in the knowledge level about the preoperative treatment of newborns with CLP between experienced and inexperienced OB-GYNs (P > .05). Conclusion: The knowledge levels of OB-GYNs about NAM were insufficient. We hope that this study will provide more effective results in OB-GYNs referring newborns with CLP for NAM

Obez ve normal kilolu çocuklarda diş yaşı ve iskelet yaşının araştırılması: Bir arşiv çalışması

Aim: The aim of this study was to assess dental and skeletal development in obese and normal-weight pediatric patients.Materials and Methods: A sample of 65 patients (33 boys, 32 girls aged between 9 and 15) was selected. Dental panoramicradiographies were used for determining the dental age. Dental age was evaluated using the Demirjian Method scoring system.Skeletal age was measured by hand wrist radiographies using Greulich and Pyle method. The data were analyzed by MannWhitney U and Independent t-tests.Results: There was no statistically significant difference between the obese and normal-weight groups in terms of dental age(P> 0.05). Skeletal age was significantly increased in obese boys (P 0.05).Conclusions: Paediatric dentists should consider body mass index percentile when assessing growing children because it canaffect dental and skeletal development.Amaç: Bu çalışmanın amacı,obez ve normal kilolu çocuk hastalarda, diş ve iskelet gelişimini değerlendirmektir. Gereç ve Yöntem: 65 hastadan (9 -15 yaşları arasında, 33 oğlan, 32 kız) oluşan bir örneklem seçildi. Diş yaşını belirlemek için panoramic radyografiler kullanıldı. Diş yaşı Demirjian yöntemi puanlama sistemi kullanılarak değerlendirildi. İskelet yaşı Greulich ve Pyle yöntemi kullanılarak el bileği radyografisi ile ölçüldü. Veriler Mann- Whitney U ve Independent t-testleri tarafından analiz edildi. Bulgular: Diş yaşı açısından obez ve normal kilolu gruplar arasında istatistiksel olarak anlamlı farklılık yoktur. (p> 0.05) Sonuç: Çocuk diş hekimleri, diş ve iskelet sisteminin gelişimi etkilenebileceğinden, çocukların büyümesini değerlendirirken vücut kitle indeksi yüzdeliğini göz önünde bulundurmalıdır

Are the low-shrinking composites suitable for orthodontic bracket bonding?

PURPOSE: To evaluate the shear bond strength (SBS), adhesive remnant index (ARI), and microleakage of low-shrinking and conventional composites used as an orthodontic bracket bonding adhesive. MATERIALS AND METHODS: A hundred twenty non-caries human premolars, extracted for orthodontic purposes, were used in this study. Sixty of them were separated into two groups. Brackets were bonded to the teeth in the test group with Silorane (3M-Espe) and control group with Transbond-XT (3M-Unitek). SBS values of these brackets were recorded in MPa using a universal testing machine. ARI scores were determined after the failure of brackets. The remaining 60 teeth were divided into two groups and 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 mean SBS for Transbond XT was significantly greater than low-shrinking composite (P < 0.001). Significant differences (χ(2) =29.60, P < 0.001) were present between the two groups for the ARI scores. Microleakage values were lower in low-shrinking composite than in the control group, and this difference was found to be statistically significant (P < 0.001). CONCLUSIONS: Although low-shrinking composite produced insufficient SBS and ARI scores, microleakage values were lower in low-shrinking composite than in the control group on the etched enamel surfaces, when used as a bracket bonding composite