ABSTRACT
Odontogenic fibroma is a rare benign tumor of mature fibrous connective tissue, with varying amounts of inactive-appearing odontogenic epithelium, with or without evidence of calcification. There are two types ; central odontogenic fibroma and peripheral odontogenic fibroma. Peripheral odontogenic fibroma is a rare, non-encapsulated benign tumor of the oral mucosa often mistaken for a reactive lesion. Peripheral odontogenic fibroma is very often underdiagnosed or simply misdiagnosed, and therefore not much is known about this lesion. Through this work, we tried to bring out the sociodemographic, clinical, paraclinical and therapeutic characteristics of this lesion.

ABSTRACT
Background: A variety of approaches can be employed to close diastemas using conservative and non-conservative restorative techniques such as composite restorations, laminate veneers, and crowning if there is no indication for orthodontic treatment. Objectives: This paper aimed to discuss the mechanical properties of sectional laminate veneers, the preparation, and the ceramic material used for their manufacturing. Material and methods: A case of a maxillary midline diastema closure using feldspathic partial laminate veneers with an ultra-conservative preparation is described. Results: Feldspathic sectional laminate veneers achieve an esthetically pleasant diastema closure. The ultra-conservative preparation and adequate polishing technique preserve dental and gingival tissues. Conclusion: It can be concluded that sectional partial veneers are an esthetic option with low mechanical properties that must be carefully indicated.

ABSTRACT
The main goal of orthograde root canal retreatment is to completely remove the root canal content and chemically treat the residual infection. Purpose: The aim of this study was to evaluate the effectiveness of D-Race retreatment files supplemented with XP-Endo Finisher R in the removal of root canal filling material from oval-shaped canals. Methodology: Twelve mandibular incisors initially shaped with XP-Endo Shaper and filled by warm vertical compaction were consistently retreated with D-Race files and XP-Endo Finisher R. Micro-CT images were used to evaluate the quality of the root canal filling and the amount of remaining filling material after the two retreatment procedures. Results: The largest amount of root canal filling was removed at full canal length after using each of the retreatment systems. Significant difference was registered between the accumulated effect of the retreatment with D-Race and XP-Endo Finisher R and the volume of the initial filling material at full canal length (p<0.001). Insignificant difference in the amount of remaining filling material was found after using the supplementary retreatment system (p>0.05). The XP-Endo Finisher R file was almost equally efficient in the different portions of the canals but was still most productive apically. Conclusions: The additional application of XP-Endo Finisher R after the D-race retreatment files removed a significant amount of root canal filling. The combined use of the two retreatment systems did not result in completely clean root dentin walls.

ABSTRACT
Cleaning and shaping of the root canal system are essential for the successful outcome of endodontic treatment. In addition to the routinely used irrigating solutions, other technologies have been investigated for the treatment of root canal dentine, such as different types of laser systems. Purpose: The aim of our in vitro study was to evaluate the effect of different types of laser irradiation (Er:YAG , Nd:YAG, diode laser and photodynamic therapy) on the intracanal dentin and their interference in the apical seal of filled root canals. Methodology: 72 human single rooted teeth were randomly assigned into 6 groups. Root canal preparation was done using ProTaper Universal rotary system up to F3. The laser irradiation was performed at the end of the traditional endodontic preparation as a final means of decontaminating the endodontic system. Teeth were filled with a core-carrier system Guttacore (Dentsply, Sirona) and sealer AH- plus. Results: Statistical analysis showed that all groups had significantly less leakage in apical third than the control group. The laser-treated groups presented better results than Group II (Classical disinfection protocol), without statistically significant difference. The morphological changes on the apical intraradicular dentin surface caused by Nd:YAG and Er:YAG laser irradiation resulted at least linear dye apical leakage. Conclusions: Laser irradiation may improve the apical seal of the root canal. Different type of laser systems with appropriate parameters are recommended to be used as an adjunct to the current chemical root canal disinfection protocols.

ABSTRACT
Еndodontic irrigants could alter the mechanical properties of root canal dentin. The aim of the current study was tо compare the effect of three irrigation protocols on root canal dentin microhardness and roughness with respect to their concentration and additional ultrasonic activation for the same treatment period. Forty single-rooted, intact upper incisors were decoronated and sectioned longitudinally in buccolingual direction. The surfaces of all eighty samples were polished and randomly allocated into four equal groups (n=20): Group 1: Control group (distilled water); Group 2: 2% NaOCl/2 min followed by 17% EDTA/2 min; Group 3: 2% NaOCl/2 min followed by 17% EDTA/2 min, both ultrasonically activated Group 4: 5.25% NaOCl/2 min followed by 17% EDTA/2 min. Root dentin microhardness was significantly lowered by all of the irrigants regardless of their concentration and/or additional agitation (p<0.05). The surface of root canal dentin was roughned to the greatest extent by the ultrasonically activated irrigation solutions (p<0.001). The ultrasonic activation of the disinfection solutions significantly altered the biomechanical properties of dentin.

ABSTRACT
Tooth loss is, for the majority of patients, a strong physical and psychological disorder. The objective of this study was to evaluate the individual perception of dental aesthetics among patients received for joint prosthetic rehabilitation in the prosthesis department of the CHU-OS of Bamako. This was an epidemiological, descriptive and prospective study. The survey lasted 5 months, from April to August 2013. The population studied is made up of all the people seen in the prosthesis department. The variables studied were socio-demographic (sex, age) and clinical variables (reason for consultation, color, shape and position of teeth, personal appreciation of aesthetics, smile identification, patient satisfaction). The data obtained were entered and analyzed with SPSS version 20 software and processed with Word 2013 software. We examined 218 patients and the distribution according to sex showed a predominance of women with 67% with a sex ratio of 0.49. The study highlighted the youth of our population with 34.86% of people who are between 25 and 34 years old. In this study, white and well-positioned teeth are the dental aesthetic criteria most sought after by patients with respectively 91.3% and 54.6% of cases considering the position of the tooth always in association with the color as an important element in the aesthetics of a smile. The disability of edentulism opens up a psychological dimension that the practitioner must understand. It is a global care of the patient with his doubts and anxieties.

ABSTRACT
Background: Ankyloglossia “tie tongue” is a congenital anomaly, characterized by abnormal short thick lingual frenum that causes limitation of tongue movement, which results in problems in speech, mastication and patient discomfort. Laser is an alternative for conventional surgery to treat ankyloglossia. Case Report: A 50 years old female patient presented with ankyloglossia to laser clinic in faculty of Dentistry in Misr University for Science and Technology. Lingual frenectomy was done with Diode Laser with 980 nm wavelength, fiber tip diameter 300 μm, power 1.5 Watt, continuous wave mode and contact mode. The time of procedure was only 15 minutes, with bloodless field during work. Patient dismissed without sutures or wound dressing. Results: There was no post-operative pain, discomfort or swelling. Complete healing occurred after 2 weeks. The patient was very satisfied with the quick painless procedure. Conclusion: Diode Laser 980nm treatment of Ankyloglossia is a simple, quick, painless and safe, and effective procedure. We recommend this treatment modality because of its advantages for both the patient and the operator.