Assessment of the Push-Out Bond Strength for Glass Fiber Posts After Different Surface Treatments: An In Vitro Study.

AIM: The goal of the study was to assess the push-out bond strength of the glass fibre post after different surface treatments. MATERIALS AND METHODS: For the purpose of the investigation, 40 mandibular premolars were chosen. After gaining access, the biomechanical preparation was completed using the step-back approach up to a size 40K file, and the canals were sealed using gutta-percha cones and the lateral condensation procedure with AH Plus sealer (epoxide-amine resin pulp canal sealer). Peeso reamers were used to remove the canal fillings, leaving 5mm of gutta-percha apically. Drills included in the package were used to prepare the post spaces so that the posts would fit in their respective post slots. These were attached to self-curing acrylic resin blocks. Fibre posts were split into four groupings of n = 10 each for surface treatment, i.e., control, hydrogen fluoride, sandblasting, and hydrogen peroxide. The cementation of posts was done by utilising dual-cure resin cement. Two millimetres of the anatomical crown were removed from each sample. Each sample's 1-mm cervical segment was taken utilising the isotope from the remaining coronal area. To perform a push-out test, at the rate of 0.5mm/min of the crosshead, every sample was inserted into a universal testing device. Each post's dislodge force from the pre-set post spacing was measured. Statistics were utilised to analyse the data. RESULTS: Strongest bonds were made by silanization, followed by sandblasting (p value=0.002). The weakest bonds were made by the control group. CONCLUSION: The ultimate deduction was that when glass fibre posts underwent various types of surface treatments followed by silanization, it had a significant impact on increasing their strength.

Knowledge, Attitude and Practices among Gynecologists Regarding Oral Health of Expectant Mothers of South Bengaluru, Karnataka.

Background: To evaluate the knowledge perspective and trainings among gynecologists' considering oral health of pregnant mothers of South Bengaluru city, by questionnaire. Materials and methods: A total of 60 gynecologists are included in the study. Prior to the study, the questionnaire was pretested by Pedodontist. The questionnaire was administered on the first day of visit, and on the next day it was collected back. Results: The research unveiled that a greater number of gynecologists had satisfactory knowledge attitude and training concerning oral health of expectant mothers. Conclusion: The predominance of gynecologists has satisfying knowledge perspective as well as practices, but still there is a demand for better effective attendance and involvement of medical specialists like gynecologists and pediatricians in continuing the education programs and forums on dentistry. How to cite this article: Popli HP, Kumar VD, Khatib MS, et al. Knowledge, Attitude and Practices among Gynecologists regarding Oral Health of Expectant Mothers of South Bengaluru, Karnataka. Int J Clin Pediatr Dent 2022;15(1):85-89.

Comparing Sterilization of Endodontic Hand Files by Four Different Methods: An In Vitro Study.

Aim and objective: The aim and objective of this study is to compare the efficacy of four various approaches of sterilizing endodontic hand files via Autoclave, Glass-bead sterilizer, Glutaraldehyde solution, and Diode laser. Materials and methods: Fifty-two k-files of size #25 and length 21 mm were taken for the study. All the 52 files were presterilized in an endodontic instrument box via autoclave. Bacillus stearothermophilus spore suspension was prepared and all the presterilized files were contaminated with stearothermophilus spore suspension in a sterile Petri dish under vacuum hood safety. Later, the test files were randomly divided into four groups of 13 each and subjected to four different methods of sterilization- Autoclave, Glass-bead sterilizer, Glutaraldehyde solution, and Diode laser. Files were then be placed in thioglycollate media containing test tubes and incubated in an incubator at 55°C and checked for turbidity at 3 days and 21 days. Result: The result revealed that there was no Turbidity present in test tubes on both the 3rd and 21st day for autoclave. In all the remaining sterilization procedures there was some amount of turbidity present. In terms of sterilization provided autoclave provides complete sterilization and glutaraldehyde solution is the least effective.The specificity of Bacillus stearothermophilus was then confirmed with a sugar test viz., starch hydrolysis test which gave a positive result confirming the presence of Bacillus stearothermophilus. Conclusion: We can conclude that autoclave is the perfect process of sterilization providing 100% sterility and although Glass-bead didn't provide 100% sterility, it can be used as an alternative if autoclave is not available. How to cite this article: Ameer B, Khatib MS, Peerzade SM, et al. Comparing Sterilization of Endodontic Hand Files by Four Different Methods: An In Vitro Study. Int J Clin Pediatr Dent 2022;15(2):149-152.

Decoding the Perplexing Mystery of Para-Chloroaniline Formation: A Systematic Review.

OBJECTIVE: The objective of this article was to understand and decode the mystery of the formation of para-chloroaniline (PCA). The ingredient of the brown precipitate after mixing sodium hypochlorite (NaOCl) and chlorhexidine gluconate (CHX) is still in debate. MATERIALS AND METHODS: Various studies adopt a different methodology to substantiate that it may contain PCA, which is a carcinogenic agent. The purpose of this systematic review is to evaluate the relationship between PCA and brown precipitate. Two reviewers independently conducted a comprehensive literature search. The MEDLINE, Embase, Cochrane, and PubMed databases were searched. In addition, the bibliographies were manually searched. There was no disagreement between the two reviewers. This review was reported and conducted in step with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. RESULTS: Of 233 articles, only 13 articles met the inclusion criteria. Available scientific evidence was more supportive that the brown precipitate form after mixing NaOCl and CHX may form para-chloroamide moiety rather than free PCA, and PCA may be the by-product of CHX degradation. CONCLUSION: On the basis of the current evidence and data extracted from the various databases, it can be concluded that the mixture of sodium hypochlorite and chlorhexidine does not form PCA, and PCA may be the by-product of high concentrated chlorhexidine. Further studies are required to substantiate the evidence.