The choice of appropriate definitive restoration endodontically treated teeth should be guided by the amount remaining hard tissues as well functional and aesthetic considerations. Post and-core materials with biomechanical properties similar to dentin could also advantageous in reducing risk root fractures. high performance polymer Poly-ether-ether-ketone (PEEK) is an example one such type mat...

AIM The aim of this clinical study was to compare the fracture resistance, marginal adaptation, and rate of recurrent caries of bonded and nonbonded amalgam restorations in endodontically treated premolar teeth. METHODS AND MATERIALS A total of 36 patients with endodontically treated maxillary first or second premolars were selected and divided into three groups. The treatments in all groups ...

direct restoration of severely damaged endodontically treated teeth (ett) using available and conventional and current matrix systems is sometimes impractical and in some clinical cases is impossible. the aim of this paper is to introduce and describe a new matrix system based on rigid tray technique (rtt) for dealing with such difficult clinical cases.

Introduction: the Restoration of endodontically treated teeth is critical, and the Awareness of stresses developed by oblique and vertical forces in restorative methods take a great role in treatment plans. Due to the anatomical shape and inherent form of the stress distribution premolars, could be lost by fractures. Some fractures such as vertical fracture which is probable in...

INTRODUCTION Root canal-treated teeth are weaker than vital teeth and are more susceptible to fractures. Therefore, special precautions should be adhered to, such as the use of various types of cast or prefabricated posts. Regarding the effect of post material on fracture resistance of teeth, the aim of this in vitro study was to evaluate the effect of non-precious gold color alloy (NPG) and ni...

PURPOSE This in-vitro study aimed to evaluate the fracture resistances and failure modes of endodontically treated mandibular premolars restored with endocrowns and conventional post-core retained crowns. MATERIALS AND METHODS Thirty mandibular premolars were assigned into three groups (n=10): GI, intact teeth; GE, teeth with endocrowns; GC, teeth with conventional post-core supported crowns....

The extraction of grossly decayed teeth with least remaining tooth structure has now become the history. With advances in the field of dentistry, teeth formerly considered for extraction are now being saved. However, it is clear that significant reconstruction is often required, and evident that a wide variety of ways exist to achieve this. The longevity of endodontically involved teeth has bee...

Anatomic and internal morphology of a root canal system is more complex and differs for each individual tooth of which mandibular premolars have earned the reputation for having aberrant anatomy. The occurrence of three canals with three separate foramina in mandibular second premolars is very rare. A wider knowledge on both clinical and radiological anatomy especially spiral computed tomograph...

background and aims. the aim was to evaluate the effect of three methods of fiber insertion on fracture resistance of root-filled maxillary premolars in vitro. materials and methods. sixty extracted human maxillary premolars received endodontic treatment followed by preparation of mesioocclusodistal (mod) cavities, with gingival cavosurface margin 1.5 mm coronal to the cementoenamel junction (c...

Background & Aims: Crown restoration of teeth after root canal treatment protects their remaining structure against breakage and infection of the root canal, and will replace the missing structure. This study was performed to identify the prevalence of different types of crown restorations after root canal treatment of posterior teeth in Kerman, Iran, in 2013. <stro...