http://jcr.tums.ac.ir/index.php/jcr/issue/feed Journal of Craniomaxillofacial Research 2019-01-12T10:11:07+0330 Dr. jcr@tums.ac.ir Open Journal Systems http://jcr.tums.ac.ir/index.php/jcr/article/view/258 Processing techniques of acrylic resin in removable and maxillofacial prosthesis: A review 2019-01-12T10:10:01+0330 Somayeh Allahyari drsomayehniakan@Yahoo.com Somayeh Niakan drsomayehniakan@Yahoo.com <p>Compression molding with heat activation for resin polymerization is the conventional method for <br>processing acrylic resin in removable and maxillofacial prosthesis. Overtime, different processing <br>methods have been improved to overcome physical and chemical problems in cured resin with <br>conventional technique. Enough knowledge about each method is necessary for both dentist and <br>laboratory technician. The aim of this study is review the improved techniques for curing resin <br>and comparison between them. An online search of PubMed, Scopus, Science Direct, and Google <br>Scholar was conducted using key words “denture possessing technique” and “acrylic resins” from <br>1970 until September 2018. The most common and successful techniques are injection molding <br>and conventional methods. CAD/CAM technologyis especially useful for maxillofacial prosthesis <br>but still needs more studies. <br><strong>Keywords</strong>: Denture possessing technique, Acrylic resins, Maxillofacial prosthesis, Removable <br>prosthesis.</p> 2018-09-15T00:00:00+0430 ##submission.copyrightStatement## http://jcr.tums.ac.ir/index.php/jcr/article/view/267 Knowledge and practice of senior medical students in Tehran University of Medical Sciences toward emergency management of tooth avulsion 2019-01-12T10:11:07+0330 Samaneh Razeghi leilamehrtalab@Yahoo.com Simin Zahra Mohebbi leilamehrtalab@Yahoo.com Leila Mehrtalab leilamehrtalab@Yahoo.com Mohammad Javad Kharrazi Fard leilamehrtalab@Yahoo.com <p><strong>Introduction</strong>: Since physicians are frequently the first one to actually provide primary treatment <br>in case of tooth avulsion, they need to have sufficient awareness in the basic principles of <br>management this emergency situation. The aim of this study was to evaluate knowledge and self-reported <br>practice of senior medical students at Tehran University of Medical Sciences (TUMS) about <br>managing tooth avulsion. <br><strong>Materials and Methods</strong>: This cross-sectional study evaluated the knowledge and self-reported <br>practice of senior medical students (n=150) in TUMS towards management of tooth avulsion. <br>A standard anonymous questionnaire obtained from previous studies was distributed among <br>students. The questionnaire was consisted of questions on backgrounds (age, gender, previous <br>encounter with tooth avulsion, previous education on management of traumatic dental injuries-<br>TDIs); knowledge, and self-reported practice regarding tooth avulsion management; and satisfaction <br>(self-competency, importance of educational programs, knowledge self-assessment, and <br>willingness for further education). After collecting the questionnaires, the answers were scored and <br>results were analyzed using descriptive statistics, linear regression model and Pearson correlation <br>coefficient.</p> <p><strong>Results</strong>: Totally, 126 questionnaires were collected (Response rate= 84%) of whom 49 (%38.9) <br>were male and 77 (%61.1) were female, with the mean age 25.1±1.2. Previous encounter with tooth <br>avulsion was reported by 18 students (14.3%). Only five students (%4) had received education <br>regarding TDIs. The knowledge, and self-reported practice mean score were 3.82±1.29 (out of 12), <br>and 4.44±0.7 (out of 8), respectively. None of background variables had a significant relationship <br>with the knowledge, and self-reported practice mean scores. There was no correlation between <br>students’ knowledge and self-reported practice. More than 97% of students reported low/very low <br>self-competency for replantation of an avulsed tooth. Majority of the participants (%84.2) were <br>dissatisfied with their level of knowledge and suggested that further education on the topic should <br>be offered. <br><strong>Conclusion</strong>: The results indicated that there is a need to improve the knowledge of medical <br>students regarding management of traumatic dental injuries. <br><strong>Keywords</strong>: Wounds and injuries, Medical students, Knowledge, Tooth avulsion.</p> 2018-09-15T00:00:00+0430 ##submission.copyrightStatement## http://jcr.tums.ac.ir/index.php/jcr/article/view/268 The role of postoperative administration of antibiotics in prevention of infection after open reduction of mandibular compound fractures: A randomized double-blind placebo controlled pilot clinical study 2019-01-12T09:59:54+0330 Mehrnoush Momeni Drmo_mortazavi@Yahoo.com Mostafa Mortazavi Drmo_mortazavi@Yahoo.com Minou Najarnobari Drmo_mortazavi@Yahoo.com <p><strong>Purpose</strong>: This study determines the effectiveness and/or necessity of applying postoperative <br>antibiotics in the treatment of mandible fractures. <br><strong>Materials and Methods:</strong> This is a randomized, double-blind clinical study using a placebo <br>control. 65 patients diagnosed with mandibular fractures underwent open reduction and internal <br>fixation surgery. The patients were randomly divided into 2 groups: antibiotic group (38 patients) <br>and placebo group (27 patients), based on whether or not they received postoperative antibiotics. <br>Both groups received preoperative as well as intraoperative antibiotics on the day of surgery. The <br>antibiotic group was postoperatively given clindamycin 600 mg IV every 8 hours for 5-7 days. The <br>placebo group received placebo using the same schedule for the same duration as the antibiotic <br>group. Follow-up examination was performed at discharge, 2 and 3 weeks, postoperatively. <br><strong>Results:</strong> A total number of 65 patients participated in this study; 50 (76.9%) males and 15 <br>(23.1%) females. The evidence of surgical site infection was noted in 24 out of 65 patients within <br>3 weeks post-operation totally, 13 out of 38 patients in the antibiotic group (34.3%) and 11 out of <br>27 patients in the placebo group (40.7%) had evidence of surgical site infections. No statistically <br>significant difference in the incidence of infection was noted between the groups (p&lt;.368).</p> <p><strong>Conclusion:</strong> This study could not statistically prove any beneficial effect for post-operative <br>administration of antibiotics in patients undergoing open reduction and internal fixation of mandibular <br>fractures. <br><strong>Keywords:</strong> Mandible fractures, Open reduction internal fixation (ORIF), Antibiotic, Antibiotic <br>resistance, Infection.</p> 2018-09-15T00:00:00+0430 ##submission.copyrightStatement## http://jcr.tums.ac.ir/index.php/jcr/article/view/269 Epidemiological features of oral squamous cell carcinoma 2019-01-12T10:01:35+0330 Ahmad Jafari abbaskarimi@Yahoo.com Abbas Karimi abbaskarimi@Yahoo.com Mitra Salamat abbaskarimi@Yahoo.com <p><strong>Background</strong>: Squamous cell carcinoma (SCC) is the most common head and neck cancer. <br>According to the role of epidemiological data in planning and effective interventions, the aim for <br>the current study was a five-year review of oral squamous cell carcinoma. <br><strong>Materials and Methods:</strong> In this cross-sectional study, the data was derived from 76 recorded <br>files of patients with oral SCC (OSCC) in Shariati hospital at the Tehran University of Medical <br>Sciences from 2010 to 2015. The data included demographic variables, risk factors and lesion <br>characteristics. The collected data has been analyzed by SPSS software and descriptive analysis was <br>presented. <br><strong>Results</strong>: In this study 52 patients were male (68.4%) and 24 patients were female (31.6%). The <br>mean age of patients was 60.5 ± 12.80 years. The prevalence of OSCC among men was 2.2 times <br>more than women. The most common sites of tumor were buccal mucosa (36.8%) and then mandibular <br>ridge (34.2%) and the most common clinical symptoms of tumor were painful tooth/teeth <br>which are not mobile (69.7%) and ulcer (64.5%). Based on histological grading, 64.5% of patients <br>had well-differentiated lesions. <br><strong>Conclusion</strong>: The results of this study indicate that OSCC was more common in men and seniors. <br>It also has involved buccal mucosa and mandibular ridge. The majorities of OSCC lesions <br>were well-differentiated in the oral cavity, and were in stages two and three in TNM system. <br><strong>Keywords</strong>: Oral cancer, Squamous cell carcinoma, Oral squamous cell carcinoma.</p> 2018-09-15T00:00:00+0430 ##submission.copyrightStatement## http://jcr.tums.ac.ir/index.php/jcr/article/view/240 Use of autogenous tooth bone graft with dental implants 2019-01-12T10:03:54+0330 Amirhosein Pakravan tbamdadian@Yahoo.com Maedeh Yousefnezhad tbamdadian@Yahoo.com Amin Heydarian tbamdadian@Yahoo.com Tahmineh Bamdadian tbamdadian@yahoo.com <p>Bone grafting is an appropriate solution for treatment of some cases of bone defect. Till now, <br>different method and biomaterial has been described for bone grafting. According to structural <br>similarities between bone tissue and tooth structure and some successful studies on application of <br>autogenous bone graft materials, we decided to use this biomaterial to treat a bone defect resulting <br>from tooth extraction. In this case, a healthy 36-year-old man visited us for extraction of the left <br>mandibular first molar. In order to preserve the tooth socket, we used the patient’s own extracted <br>teeth instead of using routine bone graft materials. The tooth powder processed by the device called <br>the BONMAKER and placed in the socket. After 4 mouths, the radiographic evaluation showed a <br>good bone density. Fixture placement and prosthetic restoration were done and the patient’s 5-year <br>follow-up showed good aesthetic, excellent osseointegration and little to no bone resorption, indicating <br>the reliability of this autogenous graft material. <br><strong>Keywords</strong>: Bone graft, Socket preservation, Autograft, Tooth, Implant.</p> 2018-09-15T00:00:00+0430 ##submission.copyrightStatement## http://jcr.tums.ac.ir/index.php/jcr/article/view/270 A report of ameloblastic fibro-odontoma in the 29 month old girl: A case report 2019-01-12T10:05:15+0330 Hasan Mirmohamad Sadeghi behnazpooriang@Gmail.com Masoume Fayazi Boroujeni behnazpooriang@Gmail.com Behnaz Poorian behnazpooriang@Gmail.com <p>Ameloblastic fibro-odontoma (AFO) is an uncommon benign mixed odontogenic tumor. AFO <br>presents as a painless swelling in the posterior of mandible or maxilla that radiographically shows a <br>well-defined radiolucent area containing various amounts of radiopaque deposits. Most cases occur <br>before 20 years of age, with the average age of diagnoses being 9 years. This case report describes <br>AFO affecting anterior mandible in the 29 month old girl. The lesion was surgically excised, and <br>no recurrence was observed on 2 month follow-up. <br><strong>Keywords</strong>: Ameloblastic fibro-odontoma, Odontogenic tumours, Benign jaws lesions.</p> 2018-09-15T00:00:00+0430 ##submission.copyrightStatement## http://jcr.tums.ac.ir/index.php/jcr/article/view/248 Oral lichen planus in a child in association with psychological stress: A case report 2019-01-12T10:06:17+0330 Arghavan Tonkaboni a.tonkaboni@yahoo.com Bita Maraghehpour a.tonkaboni@yahoo.com <p>Oral lichen planus (OLP) is a chronic autoimmune cell-mediated disease affecting mucocotaneous <br>tissues of oral cavity. Recent studies revealed that psychological stress may act as a trigger to initiate <br>clinical symptoms. An 8-year-old girl complaining of oral ulcer, pain and irritation in mouth <br>with onset of 3 months ago, was admitted to oral medicine department. Her medical history was <br>negative except for severe psychological trauma in last 6 months. Intraoral examination showed <br>bluish purple atrophic erosive striations with hyperkeratosis. Pathological study of buccal lesions <br>confirmed OLP diagnosis. As all primary investigations were negative; psychogenic origin was <br>suspected. Although it is rare for a child to have OLP but it should be taken into consideration in <br>differential diagnosis of red and white oral lesions in children. Huge impact of psychological factors <br>in the occurrence of oral diseases have suggested that they should be treated in combination <br>with psychotherapy. <br><strong>Keywords</strong>: Oral, Lichen planus, Infant, Stress.</p> 2018-09-15T00:00:00+0430 ##submission.copyrightStatement## http://jcr.tums.ac.ir/index.php/jcr/article/view/254 Maxillary sinus mucocele: A case report 2019-01-12T10:09:04+0330 Tayebeh Ghasemi f.bolandparva@Gmail.com Farzaneh Bolandparva f.bolandparva@gmail.com Majid Beshkar f.bolandparva@Gmail.com <p>Maxillary sinus mucocele is a benign uncommon cyst which is caused by the progressive accumulation <br>of mucous. It presents with a slowly expanding growth and is asymptomatic at the beginning. <br>Its signs and symptoms are nonspecific and mostly due to pressure effects on the orbit or other <br>facial structures. The etiology of sinus mucocele formation is not well knowm. However, it is proposed <br>that its formation might be due to obstruction of the ostium by inflammation or previous <br>procedures such as Caldwell–Luc surgery. Endoscopic marsupialization of the mucocele is the <br>procedure of choice, even though complicated cases are best treated by intraoral open procedures. <br>We present a case of huge maxillary mucocele with a historyof previous maxillary sinus surgery. <br>Presentation and classic treatment are discussed. <br><strong>Keywords</strong>: Mucocele, Maxillary sinus.</p> 2018-09-15T00:00:00+0430 ##submission.copyrightStatement##