International Journal of Dental Materials <p>International Journal of Dental Materials</p> <p><strong>International Journal of Dental Materials (IJDM)</strong> is an Open Access, International Peer-Reviewed journal published quarterly. The journal publishes original scientific research papers, short communications, review articles, case reports and letters to the editor. The journal is dedicated to propagating progressive knowledge and evolving information to achieve a broad&nbsp;readership from basic, clinical and public health researchers to dental professionals and preachers.</p> <p>&nbsp;</p> <p><a href="" rel="license"><img style="border-width: 0;" src="" alt="Creative Commons License"></a><br>This work is licensed under a <a href="" rel="license">Creative Commons Attribution 4.0 International License</a>.</p> en-US <p>This work is licensed under a <a href="" rel="license">Creative Commons Attribution 4.0 International License</a>.</p> (Dr. Rama Krishna Alla) (Dr. Rama Krishna Alla) Mon, 22 Feb 2021 00:00:00 +0000 OJS 60 Management of dental office during COVID-19 Pandemic <p>Novel Coronavirus (COVID-19) is a deadly protein molecule devastating the humankind and has brought down the life to a standstill. Its effect is determined by the interaction among the agent, the host and the environment. The proven fact that the spread of COVID-19 is air-borne has made it mandatory for the dental fraternity to follow a systematic protocol in clinical practice. A proper history of travel and exposure, thermal scanning, symptoms of sore throat, dry cough and difficulty in breathing makes you suspect an individual with COVID-19. It is imperative to consider only emergency and essential dental procedures to be carried out under strict aseptic measures, not only for suspects but also for routine patients.</p> <p>COVID-19 and dentistry are very closely related to each other as dental professionals are directly working in the oral cavity. Although the Ministry of Health &amp; Family Welfare has issued comprehensive guidance to prevent the occurrence of hospital-acquired infection (HAI) in health facilities, the practice of universal precautions might still be lacking in many dental professionals due to improper knowledge. Data acquisition was carried out using the keywords, COVID-19, control of infection, and patient management in dental offices in PubMed, Medline, ProQuest, etc., electronic databases. There was also a manual scan of many journals and books, and highly relevant papers were considered for the present study.</p> Sri Sowmya Kalidindi, C Ravi Kumar, M Sujesh, Pavani Lukka Copyright (c) 2021 International Journal of Dental Materials Mon, 22 Feb 2021 00:00:00 +0000 Comparative evaluation of micro-tensile bond strength between zirconia core and all-ceramic layering with different surface treatments: an in vitro study <p><strong>Background</strong>: The quest for newer and stronger materials for replacing teeth has resulted in Zirconium oxide's introduction, which possesses excellent mechanical strength and toughness. However, uncertainty exists in the relationship between its bond strength and surface treatment method adopted and the mode of failure at the interface.</p> <p><strong>Aim</strong> - The study aimed to evaluate the comparison of micro-tensile bond strength between the zirconia core and all-ceramic layering with different surface treatments and analyse their failure mode by Scanning Electron Microscope (SEM).</p> <p><strong>Materials and methods:</strong> Zirconia cores (Ceramill ZI 71 XS) were fabricated by CAD-CAM into discs with 5mm diameter and 3.5mm height. Then the cores were divided into four groups. Among which, Group-I was the control group, and the remaining are surface treated. Group-II specimens were treated with sandblasting, followed by acid etching; Group-III and Group-IV were treated with zirliner and glass beads, respectively. After that, the veneering material (IPS Empress, E.max Ceram Dentin) of 2×2 mm was adhered to the zirconia core and then kept in the ceramic furnace. The specimens were mounted on a Universal Testing Machine, and tensile stress is applied. The obtained data were subjected to One-way ANOVA and Tukey-HSD tests for statistical analyses.</p> <p><strong>Results</strong> - The samples treated with sandblasting followed by acid etching showed more micro-tensile bond strength between core and veneer interface. Furthermore, the SEM study revealed a cohesive failure in Group-II, whereas, in Group-I and -III, there was an adhesive failure. Group-IV specimens exhibited a mixed failure. One-way ANOVA showed significant differences (p=0.001) within the groups. In posthoc analysis, Group-III showed significant differences with Groups -I, II, and IV.</p> <p><strong>Conclusion</strong>: Increased surface roughness of zirconia obtained by sandblasting with aluminium oxide particles, when coupled along with chemical etching with hydrofluoric acid, enhanced the micro-tensile bond strength between the Y-TZP zirconia core and veneering ceramic.</p> Kiran Yadavilli Surya , Kuttae Viswanathan Anitha, Ghandikota Alekhya Copyright (c) 2021 International Journal of Dental Materials Mon, 22 Feb 2021 00:00:00 +0000 Prevalence of middle mesial canals and Isthmi in mandibular molars in a subpopulation of Andhra Pradesh: An in vivo investigation using CBCT. <p><strong>Background: </strong>Pulp and root canal space is enigmatic and highly complex. Encountering rare has become a norm with the advancements in the technology of materials and types of equipment. The success of the root canal treatment depends on the effective removal of bacteria from the whole pulp space. A high percentage of the missed canal is reported for the failure of Endodontic therapy. Mandibular molars have complex root canal anatomy. Two roots with two canals in mesial root and one to two canals in distal root is a common occurrence. Nevertheless, the incidence of variation is relatively high, including separate distolingual, mesiobuccal, C-Shaped canals, isthmus, and additional canal in the mesial root. A wide range of the middle mesial canal occurrence, i.e., 3.1 to 46.1%, is reported in the world and 28.3% in North India.</p> <p><strong>Aim: </strong>To identify the prevalence of the true middle mesial canal (MM) and configuration of Isthmi in the mesial root of the mandibular molar in the AP subpopulation of South India. </p> <p><strong>Materials and methods:</strong> CBCT of 89 patients were randomly selected from the institutional database. Data entry was performed in Excel, and data analysis was done with the Statistical Package for Social Sciences (SPSS).</p> <p><strong>Results: </strong>Four images (4.5%) revealed Middle Mesial canals with no statically significant occurrence. The frequency of isthmi in the mesial roots was 52.7%. This showed a considerable presence.</p> <p><strong>Conclusion: </strong>MM canals are 4.5% in a subpopulation of Andhra Pradesh. Isthmuses are very common in the mesial roots of permanent mandibular molars. Isthmus about 58% was seen with Type II configuration that is the presence of two canals without a definite communication.</p> Girija S Sajjan, Ch Rajashekar, K Madhu Varma, R Kalyan Satish, T  Rishitha, G Srikanth Copyright (c) 2021 International Journal of Dental Materials Mon, 22 Feb 2021 00:00:00 +0000 The effect of Fit-checking material and various subsequent cleaning methods on the wettability of the dentin surface: an in vitro study <p><strong>Background: </strong>GC Fit-checker is a modified polyvinyl siloxane impression material exclusively used to check the internal fit and improve the marginal fit of indirect restorations. An unpolymerized organic film is known to be leftover on the bonding surfaces after the silicone disclosing procedure. Residual silicone film being hydrophobic may alter the wettability of the cement to the tooth/metal surface, thus having a detrimental effect on the bond strength and retention of the restoration. </p> <p><strong>Aim:</strong> This study aimed to evaluate the wetting of luting liquid (GIC) to tooth dentin surface after application of Fit-checker and evaluate the efficiency of various surface treatments in removing the residual silicone film.</p> <p><strong>Materials and Methods:</strong> Extracted human molars were mounted on the acrylic block, and the tooth occlusal surface was ground flat till the dentin exposure. All the specimens were assigned into five groups: <strong>Group 1:</strong> without application of Fit-checker (control group);<strong> Group 2:</strong> without any surface treatment after peeling off Fit-checker; <strong>Group 3:</strong> surface treatment with wet pumice; <strong>Group 4:</strong> 37% phosphoric acid treatment; <strong>Group 5:</strong> 10% polyacrylic acid treatment. Later, Type 1 Glass Ionomer Cement (GIC) liquid drop was placed on the dentin and photographs were made horizontally using a standardized procedure. Contact angles were measured using AUTOCAD software. Obtained values were statistically analyzed using the One-way ANOVA test and Tukey’s Post hoc test. Samples of each group were examined using the scanning electron microscope.</p> <p><strong>Results</strong>: Statistically significant difference was observed among all the groups except between Group 4 and Group 2 (p &gt; 0.05). SEM images of various groups showed a significant difference in roughness patterns.</p> <p><strong>Conclusion</strong>: Surface treatment with pumice and the rotary brush was an effective method among the three in cleaning the residual silicone film.</p> Jampana VVSN RAJU, D Bheemalingeswar Rao , MC Suresh Sajjan, P Jitendra Babu, AV Ramaraju, YJB Manikyamba Copyright (c) 2021 International Journal of Dental Materials Mon, 22 Feb 2021 00:00:00 +0000 Fabrication of feeding plate to an infant with Pierre-Robin syndrome: a case report <p>Cleft lip and palate is a congenital deformity associated with maxillary sagittal and transverse discrepancies. Feeding is an immediate concern in children born with a cleft as it delays their normal growth. A feeding plate is essential for proper nutrition, and it has a role in craniofacial development and decreases the incidence of otitis media and nasopharyngeal infections. This case report describes a single visit technique for fabrication of feeding prosthesis for a 5- day old new-born infant with cleft lip and palate. The prosthesis helps in reducing the flow of food into the nasopharynx, thus decreasing the incidence of Otis media and oro-nasopharyngeal infections.</p> Bhargavi Challagondla, Papala Sesha Reddy, Soundarya Kurakalva Copyright (c) 2021 International Journal of Dental Materials Mon, 22 Feb 2021 00:00:00 +0000