Journal of Dental Materials and Techniques
Volume:7 Issue: 4, Autumn 2018

The simplest and fastest way of producing an acceptable and accurate cast is by adopting the two-pour or inversion method. This process is slightly cumbersome and messy due to difficulty of access. A much more efficient, easy and artistic way of accomplishing it is described by adopting a Rotating Cake Icing Table

Sealing ability of a retrograde filling material is an important factor for a successful endodontic apicoectomy. The purpose of this in-vitro study was to compare the sealing ability of calcium enriched mixture (CEM) cement versus amalgam as root-end filling materials. A total of 36 canals of extracted maxillary central incisors were instrumented and obturated using lateral compaction technique. The apical 3 mm of each root was resected and root-end prepared to a depth of 3mm.The teeth were randomly divided into two experimental groups of 15 teeth according to tested materials (Amalgam, CEM cement) and two negative and positive control groups of 3 teeth. Root- end cavities were restored with amalgam (group 1) or CEM (group 2). Sealing ability was evaluated by dye penetration method using Pelikan ink, and a stereomicroscope at x10 magnifications and 0.01 mm accuracy. Data were analyzed by T-test and P The mean linear dye microleakage for CEM cement and amalgam retrofilled groups were 2.08 and 3.77 mm, respectively. There was a statistically significant difference between the two groups (p<0.0001). under the condition of this in vitro study, CEM cement provides a better seal than amalgam when used as a retrograde filling material.

Citation analysis is a suitable way to help us to identify research trends within a specific topic. The purpose of this study was to identify the 100 most cited articles in the field of dentistry published over the past 67 years. A comprehensive list of the most cited articles in dentistry was compiled using ISI Web of Science. The characteristics including number of citations, authors and journals were analyzed. The database resulted in 3,831 articles with 100 or more citations published between 1950 and 2017. Most of these articles had been published by the Journal of Clinical Periodontology, followed by the Journal of Periodontology, and Journal of Dental Research. Sokransky SS followed by Lindhe J, Nyman S, and Genco RJ had the most number of citations. The most cited articles in the field of dentistry allows for advances in this field and also provide useful information for direct future studies and patient care.

This interventional in-vitro study aimed to evaluate the antimicrobial activity of a new Nano Zinc OxideEugenol (NZOE) sealer in comparison with AH26 and Pulpdent common root canal sealers against endodontic pathogens. The antimicrobial efficacy of three sealers(NZOE, AH26 and Pulpdent) against Enterococcus faecalis (ATCC 29212), Escherichia coli (ATCC 25922), Streptococcus mutans (ATCC700610), Candida albicans (ATCC 90028), and Staphylococcus aureus (ATCC 25923) were evaluated by Direct Contact Test (DCT) at five different time intervals 0, 2, 14, 48 hours and 7 days. The results were statistically analyzed using SPSS software and Kruskal–Wallis at 5% significance level. All three tested sealers had antimicrobial activity against microorganisms involved in this study. Fresh NZOE sealer eliminated all microorganisms tested, except the strain of E. faecalis colony which was reached to zero after 2 hours. However, AH26 and Pulpdent failed to completely kill all of the E. faecalis colony during the entire observation period. Also, NZOE showed a significant antimicrobial action (P<0.05) in comparison with other two sealers by effectively eliminating the Candida albicans colonies at zero time and 7 days. Highest antimicrobial effect of NZOE sealer was shown followed by Pulpdent sealer and AH 26 against Candida albicans and Enterococcus faecalis.

In patients susceptible to infection, after dental procedures which lead to soft tissue manipulation or bleeding, the occurrence of bacteremia is probable. Hence, antibiotic prophylaxis is very important in this group of patients. The purpose of this study was to assess the level of awareness of senior dental students and general dental practitioners in the city of Yazd about the indications of antibiotics prophylaxis and the proper way of prescribing the prophylactic regimens. This study is a cross-sectional descriptive-analytical study. To collecting data, prepared questionnaires distributed among 60 general dentists and 60 senior students. The mean of knowledge scores of senior dental students and general dentists were 55.43 and 55.06 respectively. Both groups showed acceptable levels of knowledge. The levels of knowledge of senior dental students and general dental practitioners were desirable and this may be due to the participation of practitioners in relevant re-training programs or allocation of related academic resources in this area during their education.

Toothbrush is a well-known tool in oral care. Effective tooth brushing can help in the management of dental caries and periodontal disease. Familiarity of children with this device is important. Dentists and their assistant need adequate information about children's oral hygiene to educate them and their parents. The aim of this review was to pinpoint the main issues of brushing teeth in children such as toothbrush design, methods of tooth brushing, and possible hazards of tooth brushing. In conclusion, tooth brushing twice daily under parent's supervision is recommended. Parents can help children and keep them safe from possible hazardous events.

Osteosarcoma (OS) is a malignant tumor that induces formation of osteoid or immature bone and rarely occurs in maxilla. Maxillofacial OSs are reported to occur in the third to fifth decades that is 1-2 decades later than the mean age for OS of long bones. The present case is a 62-year-old man with facial asymmetry and pain in his left upper jaw. Intraoral examination showed a bony hard, tender swelling about 50 x 60 mm in diameter in the maxillary alveolar ridge extending unilaterally from the maxillary incisor to the molar region which had expanded the buccal and palatal aspects of alveolar ridge. Computed tomography showed a hyper dense mass in the left maxilla extending to maxillary sinus. The diagnosis of OS was confirmed by histopathologic evaluation. Following the initial surgery, a local recurrence developed in the facial region of the patient within 18 months. Radiographic evaluation of OS of maxilla is important for diagnosis. Early diagnosis and radical surgery are the keys to increasing survival rate.

Statement of the problem: Nowadays leishmaniasis is a common infectious disease around the world which is caused by a protozoan parasite named Leishmania. This parasite is transmitted to human by an infected female sand fly. This disease has three clinical forms; mucosal forms are rare in Iran. The purpose of this study was to report a case of leishmaniasis with lip and oral mucosal involvement that healed successfully. This article is about patients with lip leishmaniasis with oral-mucosal involvement, clinical features were diffuse lip swelling and ulcer in right lower lip vermilion and buccal mucosa. A smear was caught which proved the diagnosis of leishmaniasis. Thereafter, the patients were referred to a dermatologist for treatment and follow up showed complete healing of the lesions. Oral mucosal leishmaniasis is rare. However, the swelling may cause different complications like loss of teeth or respiratory obstruction. It should be noted that time is a key point in treatment. So, it is necessary for us to train the differential diagnosis of chronic ulcerated oral lesions to our dentists.