Mahidol Dental Journal <p><em><strong> Mahidol Dental Journal<br /> </strong></em>Academic journals are essential for serving as a forum for knowledge sharing, thought-provoking, and disseminating innovation. It is also a platform providing for researchers to have their work published and archived. The mission of the Faculty of Dentistry, Mahidol University, is to gather educational resources relating to dentistry and provide access to the scientific community and those who are interested. Accordingly, Mahidol Dental Journal was established in 1985 and has been published triannually since then.</p> <p><em><strong>Objectives<br /> </strong></em>1. To provide a reliable source of information in the field of Dentistry.<br /> 2. To advocate research and valuable studies devoted to academic advancement.<br /> 3. To be a center of in-depth and updated knowledge for lifelong learning among dentists and other interdisciplinary audiences.<br /> 4. To contribute to the community as an honor of the Faculty of Dentistry, Mahidol University.<br /><em><strong>Editorial policies</strong></em> - Articles submitted to the publication will go through the process listed below<br /> 1. Authors will be informed when the articles have been submitted properly.<br /> 2. Title and content of the article will be reviewed by the editorial team if it is valid, beneficial, and relevant to the scope of the journal.<br /> 3. The article will be evaluated by at least three experts in each field according to the Thai Journal Citation Index Center (TCI). <strong>The reviewing process is double-blinded.</strong><br /> 4. After the experts-review, the editorial team will inform the author if the article was declined, revision required, or accepted.<br /> 5. The approved article will proceed to publication in the Mahidol Dental Journal.</p> <p> 6. No fee is charged from the authors during the submission, evaluation, and publication process.</p> <p><strong>Journal abbreviation:</strong> M Dent J</p> <p>Mahidol Dental Journal publishes trianually as the following schedule,<br /> <strong>Issue 1 </strong>January- April<br /> <strong>Issue 2 </strong>May - August<br /> <strong>Issue 3</strong> September - December</p> <p><strong>Language:</strong> English</p> <p><strong>Publication fee:</strong> Free of charge<br /><strong>ISSN: 2773-8906 (Online)</strong><br /><strong>ISSN: 0125-5614 (Print)</strong></p> en-US (Assoc.Prof.Dr.Suchaya Pornprasertsuk-Damrongsri) (Jannesa Thamwasa) Wed, 12 Apr 2023 00:00:00 +0700 OJS 60 Management of temporomandibular joint osteochondroma with facial asymmetry: a case report <p>Osteochondroma is rare in the facial region and osteochondroma of the mandible typically causes facial asymmetry and malocclusion. Resection of the affected condyle and orthognathic surgery has been frequently reported as the treatment of choice. The aim of this study was to manage a case of osteochondroma of the temporomandibular joint (TMJ) causing facial asymmetry. After extensive treatment plan discussions between the surgeon and the patient, the patient was reluctant to undergo the surgeries and chose to wait and see if there was cessation of the condylar hyperplasia instead of undergoing orthognathic surgery and condylectomy. Thus, this case was followed up by performing clinical examinations, radiographs, CT, and bone scintigraphy for approximately eight years. Subsequently, the facial asymmetry and the skeletal discrepancy became more severe. Furthermore, the bone scan revealed evidence of ongoing condylar hyperplasia. Based on these findings, the patient chose to undergo surgery. Low condylectomy with bimaxillary orthognathic surgery were selected for this case. The intraoperative sequence, however, differed from other studies in that the maxilla orthognathic surgery was performed prior to resecting the condyle and bilateral sagittal split osteotomy (BSSRO). The histopathologic results indicated that the tumor was consistent with osteochondroma. His facial asymmetry and malocclusion had been appropriately corrected. The patient did not experience restricted mouth opening, whereas postoperative complications, such as lip paresthesia and facial weakness were reported after three months. However, three months later, these complications had resolved. Moreover, the radiographic evaluation demonstrated no recurrence of the osteochondroma.</p> Thatsanai Tangmankongworakoon, Boworn Klongnoi Copyright (c) 2023 Mahidol Dental Journal Fri, 28 Apr 2023 00:00:00 +0700 A Novel saliva ejector for effective orthodontic bonding: a laboratory investigation <p class="s5"><strong><span class="s8">Objective</span><span class="s6">:</span> </strong><span class="s6">To</span><span class="s6"> use computer-aided design and computer-aided manufacturing (CAD-CAM) to design a customized saliva ejector in order to investigate the performance of the new saliva ejector </span><span class="s6">compared</span><span class="s6"> to the conventional saliva ejector with regards to shear bond strength, adhesive remnants,</span> <span class="s6">and bonding time. </span></p> <p class="s5"><span class="s8"><strong>Materials and Methods:</strong> </span><span class="s6">Forty maxillary human premolars were mounted on acrylic dental models, with four teeth per side. Three-dimensional (3D) scans of the models were made using an intraoral scanner (</span><span class="s6">iTero Element; Align Technologies, San Jose, Calif</span><span class="s6">), then imported into an orthodontic software (</span><span class="s6">OrthoAnalyzer; 3Shape, Copenhagen, Denmark</span><span class="s6">) for bracket placement. The new saliva ejector was fabricated using </span><span class="s6">ethylene-vinyl acetate </span><span class="s6">(EVA) thermoplastic sheets. Orthodontic brackets were bonded on one side of the model using the new saliva ejector, and on the other side using the conventional saliva ejector. The effectiveness of the new saliva ejector was assessed by the duration of </span><span class="s6">the </span><span class="s6">bonding, shear bond strength, and adhesive remnant index (ARI). </span></p> <p class="s5"><span class="s8"><strong>Results:</strong> </span><span class="s6">No statistically significant differences in shear bond strength were found between the new saliva ejector group (</span><span class="s6">24.73 ± 9.93 MPa)</span><span class="s6"> with the conventional saliva ejector group (</span><span class="s6">21.72 ± 1.45 MPa</span><span class="s6">). Bonding time and ARI</span><span class="s6"> score</span><span class="s6"> did not differ significantly between the two groups either. (</span><span class="s15">p</span> <span class="s6">&gt;</span><span class="s6">0</span><span class="s6">.05) </span></p> <p class="s5"><strong><span class="s8">Conclusion:</span></strong> <span class="s6">The performance of the new saliva ejector was at least comparable to the conventional type with </span><span class="s6">regard</span><span class="s6"> to shear bond strength, adhesive remnants,</span> <span class="s6">and bonding time.</span></p> Pitchaporn Buranakunaporn, Peerapong Santiwong, Rochaya Chintavalakorn Copyright (c) 2023 Mahidol Dental Journal Wed, 12 Apr 2023 00:00:00 +0700 Long-term effect of nasoalveolar molding on skeletal and dental development in patients with oral clefts; a systematic review and meta-analysis <p class="s25"><span class="s7"><strong>Objective:</strong> </span><span class="s5">This study aimed to analyze </span><span class="s23">the </span><span class="s5">treatment effects of pre-surgical </span><span class="s5">nasoalveolar</span><span class="s5"> molding (PNAM)</span> <span class="s5">on cephalometric characteristics and dentoalveolar outcome</span> <span class="s5">for patients with non-syndromic unilateral cleft lip and palate by conducting a systematic review and meta-analysis.</span></p> <p class="s25"><strong><span class="s26">Materials and </span><span class="s7">Methods</span></strong><span class="s5"><strong>:</strong> Five electronic databases and two journals were searched up through October 2021. Studies comparing treatment results between </span><span class="s5">PNAM</span><span class="s5"> and non-PNAM treatment protocols were selected for analyses. Cephalometric characteristics and dentoalveolar outcome were outcomes of interest. Data extraction, methodological quality assessment, risk of bias assessment</span><span class="s23">,</span> <span class="s5">and</span> <span class="s5">meta-analysis were performed. </span></p> <p class="s25"><strong><span class="s7">Results:</span></strong><span class="s5"> Four retrospective cohort studies were selected for a qualitative review and meta-analysis. </span><span class="s23">The </span><span class="s5">risk</span><span class="s5"> of bias assessment was moderate for all studies. Treatment results from patients who underwent PNAM were not significantly different from other treatment protocols. </span></p> <p class="s25"><strong><span class="s7">Conclusion</span></strong><span class="s5"><strong>:</strong> This study found that PNAM does not improve cephalometric characteristics and dentoalveolar </span><span class="s5">outcome</span><span class="s23">s</span><span class="s5">.</span></p> Ard Likitkulthanaporn, Supatchai Boonpratham, Yanasinee Honglertnapakul, Nuntinee Nanthavanich Saengfai, Chaiyapol Chaweewannakorn, Supakit Peanchitlertkajorn Copyright (c) 2023 Mahidol Dental Journal Wed, 12 Apr 2023 00:00:00 +0700 Effectiveness of different coated materials on root caries prevention under simulated tooth brushing: an in vitro study <p><strong>Objective:</strong> Sealing tooth root surfaces with coating material is expected to represent an effective approach to preventing root caries. The aim of this study is to investigate the effect of tooth brushing on the efficacy of different coating materials in root caries prevention.<br /><strong>Materials and Methods:</strong> The experiment was conducted on root dentin specimens under simultaneous demineralization conditions. Fifty specimens were used in this study. The specimens were divided into 5 groups: Group 1 (control group), no treatment; Groups 2-3, Clinpro White Varnishapplication with or without brushing; and Groups 4-5, PRG Coat Barrierapplication with or without brushing. A multispecies biofilm model was formed on specimens that were exposed to 1% sucrose for 10 days. Then, the % cell viability, bacterial density, % surface microhardness loss, and lesion depth were assessed using a confocal laser scanning microscope, microcomputed tomography, and Knoop microhardness tester, respectively.<br /><strong>Results:</strong> The Kolmogorov–Smirnov test revealed a normal distribution of all data. Differences within and between mean values for groups were statistically analyzed using one-way ANOVA and Dunnett’s T3 post hoc test, respectively. No significant differences in bacterial density and biofilm thickness were found among the groups. A difference in the %surface microhardness loss was noted in the control group with relatively higher %cell viability compared with the other groups. The deepest carious lesion was found in the control group. The shallowest carious lesion was found in the PRG Coat Barrier-coated dentin-without brushing group. Brushing only increases the lesion depth on Clinpro White Varnish-coated dentin.<br /><strong>Conclusions:</strong> Applying either Clinpro White Varnish or PRG Coat Barrierhas the benefits of reducing the depth of root caries and increasing the hardness of demineralized root dentin. Brushing reduces the efficacy of Clinpro White Varnish.</p> Dollaporn Thakolwiboon, Anisha Komolsingsakul, Ratchapin Laovanitch Srisatjaluk, Nisarat Ruangsawasdi, Pong Pongprueksa, Pisol Senawongse Copyright (c) 2023 Mahidol Dental Journal Fri, 28 Apr 2023 00:00:00 +0700