The purpose of this study was to evaluate the effect of age on the ratio of pulp cavity/tooth width (P/T ratio) in healthy cats. The dental radiographs of 32 cats (16 males and 16 females) were generated with a digital dental X-ray unit with the animals under general anesthesia. Standardized measurement of the canine teeth was performed by drawing a line on the radiograph perpendicular to the c...

Here we report multiple lamniform shark teeth recovered from fluvial sediments in the (Campanian-Maastrichtian) Cerro Fortaleza Formation, Santa Cruz Province, Argentina. This small tooth assemblage is compared to various lamniform sharks possessing similar dental morphologies, including Archaeolamna, Cretalamna, Dwardius, Dallasiella, and Cretodus. Although the teeth share numerous morphologic...

This work studies the process feasibility of milling a metal-matrix composite based on Inconel 625 with added NiTi-TiB2 fabricated by direct laser deposition. The is intended for manufacturing turbine blades and it has strength characteristics par those 625. However, addition TiB2 improved its heat wear resistance. material new, machinability not been studied. new was milled end mill cutters, r...

DESCRIPTION A healthy 18-year-old male patient came for a routine dental examination. His medical history was uneventful. Mandibular left central incisors exhibited small prominent cusp on its lingual surface (figure 1). The cusp was teatlike, projected from the cement–enamel junction and extended halfway to the incisal edge. The cusp measured 4.5 mm in length (incisocervically), 3.5 mm in widt...

To test the role of the miR17-92 (miR) cluster in dental bones, we evaluated the incisor tooth phenotype by micro-CT in 5- and 12-week-old conditional knockout (CKO) mice deficient in the miR17-92 cluster in type-I collagen-expressing cells and bone strength by finite element analysis. The incisor teeth of CKO mice showed a 23-30 % reduction in tissue volume and bone volume. Accordingly, the st...

OBJECTIVES Statins are used as cholesterol-lowering drugs by many patients and have been recently shown to affect bone metabolism. The aim of this study was to determine the effect of atorvastatinon on orthodontic tooth movement (OTM) in rats. MATERIALS AND METHODS Thirty-six adult male Sprague-Dawley rats were randomly divided into three groups of 12 samples each. Group A, served as control ...

statement of problem: the long-term success of a dental implant relies on implant osseointegration into native and viable bone, implant placement in an ideal position, and optimal hard and soft tissue contour. this requires the presence of sufficient alveolar bone volume, good alveolar ridge (practically with no sign of atrophy) and good surgical technique.   objectives: the aim of this randomi...

Introduction also be used for multiple restorations! or fixed partial dentures up to four units. However, if the most posterior tooth in the arch is prepared for a fixed partial denture, the patient may close at a decreased vertical dimension of occlusion, which would result in a significant negative occlusal error. Care must be excercised when this type of impression tray is used. Before the i...

Aim: The aim of this study was to evaluate the interfacial microgaps generating between different materials and between materials and dentin after polymerization of the composite restorations, using SEM. Methods: The materials investigated were a composite, an adhesive, a RMGI, and a calcium hydroxide. Thirty third molars were selected and two circular class V cavities (5 mm × 3 mm) for each to...

OBJECTIVE To describe a technique for socket augmentation in molar extraction sockets with severe bone wall defect. METHODS Five teeth in four patients were included in this study. Each tooth had buccal and/ or lingual bone loss identified by bone sounding and periapical radiographs before removal. After a flapless, minimally invasive tooth extraction, the socket was grafted with deproteinize...