background. improving the implantation conditions in order to reduce the failure is always desirable for researchers. the aim of this study was to compare two different types of dental implant materials from biomechnical viewpoint in order to introduce a novel simulation method to select suitable materials for dental implants. methods. in this research, drilling process was performed in the cor...

In 6 dogs, experiments were performed to determine the tissue reaction of the dental pulp at the 7, 30 and 60 days after direct contact of the pulp with the obturation material through a microcommunication orifice with diameter up to 1 mm, formed in the fundic part of an experimental cavity. Capping of 36 mandibular premolars with traumatically exposed pulp was carried out. On the exposed pulp,...

OBJECTIVE To evaluate the fracture resistance of teeth restored using 2 intracoronal direct and indirect adhesive techniques. METHODS Forty maxillary premolars were divided randomly into 4 groups of 10: group 1, intact teeth; group 2, mesio-occlusodistal (MOD) cavity preparation associated with endodontic therapy (unrestored); group 3, MOD cavity preparation and restoration with direct compos...

today laser has a lot of usage in medicine and dentistry. in the field of dentistry, laser is used in soft tissue surgery, sterilization of canals (in root canal therapy) and in restorative dentistry laser is used for cavity preparation, caries removal, sealing the grooves (in preventive dentistry), etching enamel and dentin, composite polymerization and removal of tooth sensitivity. the use of...

PURPOSE To measure the amount of light energy that dental students actually deliver to a Class I preparation in a dental mannequin. MATERIALS AND METHODS Approval for the study was obtained from the Dalhousie University Health Sciences Research Ethics Board. Each of 20 third-year dental students light-cured a Class I preparation in tooth 27 in a mannequin head. A photodetector located at the ...

In the present study, the compositional changes and knoop hardness of the cavity floor prepared by Er,Cr:YSGG laser irradiation was compared with that of the conventional bur cavity. Fifteen laser and 15 bur cavities were cross-sectioned, and subjected to atomic analysis by SEM-EDX and knoop hardness test. Statistical analyses were performed using the Mann-Whitney U-test; a value of P < 0.01 wa...

background: trichomonas tenax, a commensal flagellated protozoan, inhabits in human oral cavity. this parasite is cos-mopoli­tan and frequently found in patients with poor oral hygiene and advanced periodontal disease. there is only one pub­lished study that rebound the prevalence of this parasite in iran. this pcr based study compared the prevalence of oral tricho­moni­asis in patients with or...

PURPOSE The purpose of this study was to determine the degree of professional preparation among clinical instructors employed in baccalaureate dental hygiene programs in the U.S. and to examine clinical instructors' and students' perceived need for educational preparation. The data-generating sample consisted of 285 dental hygiene clinical students and 76 dental hygiene clinical instructors fr...

statement of the problem: porcelain laminate veneer is an esthetic restoration used as an alternative to full veneer crowns and requires minimal tooth preparation. in restoration with porcelain laminate veneers, both the longevity of the laminate and conservation of the sound tooth structure are imperative. purpose: the present study aimed to investigate the shear bond strength of porcelain lam...