OBJECTIVES To determine the prevalence of radiographic and histologic superior semicircular canal dehiscence (SSCD) and posterior semicircular canal dehiscence (PSCD) and associated changes in temporal bone thickness in children aged 0 to 7 years. STUDY DESIGN Retrospective chart review and histopathologic review of cadaveric bone specimens. SETTING Two tertiary referral centers. PATIENTS...

OBJECTIVE The aim of this study was to evaluate the effect of cyclic loading on the bond strength of quartz fiber posts to root canal dentin after different surface treatments of different regions of root canal dentin. MATERIALS AND METHODS Forty-eight single-rooted human teeth were selected. Post spaces were prepared and then the teeth were divided into four groups: G1: no treatment (control...

Three-dimensional hierarchical structure of female Sprague-Dawley rat tibia cortical 11 bone was characterized as a function of age (3, 12, 32, 42, 60, and 72 weeks) using a high 12 resolution micro-computed tomography. At the whole bone level, 3 week samples exhibited 13 statistically significant differences in a mean total tissue volume, mean cortical bone volume, 14 mean cortical bone volume...

I t is imperative that dentists engaged in endodontic therapy be aware of the anatomic variations that exist within the root canal system if they are to achieve satisfactory results in treatmcnt.1e4 Numerous investigations have shown anatomic variations within the root canal system. Studies utilizing injection of material into the root canal system, dye perfusions with subsequent demineralizati...

The aim of this study was to evaluate the subcutaneous biocompatibility of: Epiphany, AH Plus, Pulp Canal Sealer and Sealapex root canal sealers. Sixty rats were randomly assigned to 4 groups, according to the sealer. Polyethylene tubes containing the tested materials were inserted into the connective tissue. The implants were removed after 7, 15 and 30 days, and the tissue samples were process...

Background and aims. Various factors influence the interfacial bond between the fiber posts and root canal dentin. The aim of the present study was to evaluate the effect of pre-warming of resin cement on the push-out bond strength of fiber posts to various segments of root canal dentin. Materials and methods. In this in vitro study, 40 single-rooted human premolars were decoronated and underwe...

BACKGROUND This in vitro study compared the shaping ability of RaCe, FlexMaster, and ProFile rotary nickel-titanium instruments in severely curved root canals of extracted teeth. MATERIAL AND METHODS Sixty maxillary molars with curvatures ranging from 25° to 65° were embedded in a muffle system and portioned into five horizontal sections (thickness 1.2 mm), starting from the apex. Canals were...

Background and aims. Various factors influence the interfacial bond between the fiber posts and root canal dentin. The aim of the present study was to evaluate the effect of pre-warming of resin cement on the push-out bond strength of fiber posts to various segments of root canal dentin. Materials and methods . In this in vitro study, 40 single-rooted human premolars were decoronated and underw...

Non-human primates are most suitable for generating cervical experimental models, and it is necessary to study the anatomy of spine in non-human when models. The purpose this was provide anatomical parameters spinal cord long-tailed macaques (Macaca fascicularis) as a basis spine-related studies. Cervical specimens from 8 male adult subjects were scanned by micro-computed tomography, an additio...

The drainage system elements, namely, the canals, lose their initial design characteristics over time. In general, canals with unstable profiles are often in reclamation construction. problems of are, primarily, related to physical and mechanical properties soils, formation internal mechanical, as well chemical biological processes occurring by action natural conditions. Maximum stability is ch...