نتایج جستجو برای: nonvital
تعداد نتایج: 246 فیلتر نتایج به سال:
Introduction: Epidermolysis Bullosa (EB) is an autosomal genetic disorder that characterized by blistering of the skin and mucosa following mild trauma such as frictional trauma. There no definitive treatment has yet to be developed. The goal surgical debridement achieve a clean wound bed in fastest way, reduce bacterial burden, remove much nonvital tissue, speed up healing process, which will ...
BACKGROUND Posts are used to enhance crown buildup in pulpless teeth with destructed crown portion. Different types of post are used in endodontically treated teeth. The aim of the present in vitro study was to evaluate fracture resistance of custom made, metal, glass fiber reinforced and carbon reinforced posts in endodontically treated teeth. MATERIALS AND METHODS An in vitro study was carr...
Treatment of the immature pulpless tooth presents both an endodontic and restorative challenge. A more favorable long-term prognosis may be achieved with a mineral trioxide aggregate (MTA) apexification procedure followed by an internal bonding technique. We investigated the efficacy of this treatment option by testing the sealing ability and retention characteristics of MTA when placed as an a...
AIM Because pulpless teeth have a higher risk of vertical root fracture, the present study investigated the additional effect of root end resection upon their mechanical resistence. METHODS Finite element analysis (FEA) was used to evaluate the stress and deformations of upper anterior teeth after root end resection while loading them at 100N and 300N. RESULTS Loading teeth with root end re...
The purpose of this study was to assess the presence of apical debris remaining in the apical third of flattened root canals of vital and nonvital teeth after biomechanical preparation with Ni-Ti rotary instruments. Fresh-extracted human mandibular incisors were used in this study. The teeth had clinical indication for extraction and were submitted to cold pulp vitality testing and radiographic...
Antibiotics are a valuable addition to health practitioners for the management of bacterial infections. During endodontic treatment and when managing trauma to the teeth, antibiotics may be applied systemically or locally. Due to the potential risk of adverse effects of systemic applications, and the ineffectiveness of systemic prescribed antibiotics in necrotic or pulpless teeth and the perira...
External radicular resorption is a pathological process that generates the loss of cementum, dentin and bone, almost irreversibly, involving vital and pulpless teeth. The early stage is asymptomatic and might be diagnosed by a routine radiograph or a clinical examination. Radicular resorption appears because of cementoclastic, dentinoclastic or/and osteoclastic activity. The process of resorpti...
The in vitro antibacterial activity of K-20 prepared by addition of chlorhexidine dihydrochloride to a base sealer was compared with that of a manufactured product. The acute toxicity of K-20 was also investigated in the animals. The results demonstrated that K-20 prevents bacterial propagation without an unfavorable influence on the living tissue. K-20 was also evaluated clinically in cases of...
PURPOSE To compare the fracture strengths of pulpless teeth restored using resin cores with and without fiber posts, and with and without bonding adhesive in the post cavity. METHODS Human extracted roots were prepared with post cavities and divided into four experimental groups: Groups 1 and 2--after application of adhesive to both the top surface of the root and the inner surface of the pos...
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