ABSTRACT
The goal of crown and fixed partial denture treatment in anterior teeth is to solve esthetic problem. Apart from the ability to creating restoration color which is similar to teeth color the restoration should be made to proper contour, size, length and angulation similar to natural teeth in order to achieve esthetic fulfillment.
ABSTRACT
One of the prime goals of crown and fixed partial denture treatment is to maintain periodontal health, in which restoration contour is an important factor. In posterior teeth appropriate restoration contour promotes good function, comfort and esthetics, and facilitates the maintenance of periodontal health. Dentists should pay attention to creating suitable restoration contours in order to achieve successful treatment.
ABSTRACT
For esthetic reasons, all-ceramic fixed partial dentures are increasingly being used for partially edentulous patients. This article discusses criteria for choosing all-ceramic fixed partial dentures according to clinical studies. The development and clinical considerations for treating patients with these restorations are described.Keywords: all-ceramic fixed partial dentures, esthetics, zirconia
ABSTRACT
Due to improved ceramic materials and bonding techniques, ceramics have been increasingly used for posterior restorations especially those with highly aesthetic requirements. This paper surveys the current knowledge of ceramic inlay restorations, covering the indications and contra-indications, clinical treatment procedures, survival rates, clinical performance and also causes of failures in recent clinical studies.
ABSTRACT
The purpose of this study was to evaluate the effects of surface treatments on shear bond strength between self-etching resin cement and resin composite core material. Eighty pairs of unequal sized cylindrical specimens (Ø5x5, Ø7x5 mm.) were made from resin composite core material (Clearfil Photo Core) and randomly divided into four surface treatment groups of twenty each as following; 1) no surface treatment, 2) ED primer II, 3) silanation and ED primer II, 4) sandblasting, silanation and ED primer II. Following identical treatment to one side of cylinders in each pair, they were bond with self-etching resin cement (Panavia F 2.0) had been bonded to specimen surfaces before shear bond strength tests were performed. The result of this study revealed that the highest mean shear bond strength was achieved for the group 4.The untreated surface group 1 showed the lowest mean bond strength but no significant difference was found when compared to those with ED primer II. In conclusion of this study, sandblasting, silanation and ED primer II group was the highest among the group tested. ED primer II was not effective for improving the shear bond strength.Keyword: resin composite core material, resin cement, shear bond strength
ABSTRACT
All-ceramic restorations are increasingly considered in esthetic dentistry, with new ceramics having higher flexural strength and chemical resistance, better thermal and electrical insulation and good biocompatibility. To improve bond strength with resin cement, various surface treatments are used. This article review general guidelines for surface treatment of all ceramic restorations that using resin cement and relevant clinical procedures.Keywords: surface treatment all-ceramic crown
ABSTRACT
Resin cements are used extensively in fixing prostheses because they have good mechanical properties. This study reviewed clinical application of three types of resin cements, resin cement with total etch adhesive system, resin cement with self etching system and self adhesive resin cement.Keywords: resin cement
ABSTRACT
The purpose of this study was to evaluate the mean shear bond strength between 3 systems of resin cements (total etch, self etch, self adhesive) and coronal dentin. The crowns of 40 extracted premolars were split longitudinally in buccolingual direction, and then split in mesiodistal direction (from DEJ 1 mm). The crowns were mounted in aluminum ring with self cure acrylic resin. Specimens were wet abraded with 600-grit SiC paper and randomly divided into 4 groups (n=20). Eighty cylinders were made with Z350 composite resin (Æ 2 mm., 3 mm. in thickness). Composite resin specimens were bonded with dentin specimens by using either resin cement Variolink® II (Group1), PanaviaTM F2.0 (Group2), RelyXTM U100 (Group3), and Multilink® sprint (Group4) strictly following manufacturer’s instructions. The specimens were stored in water at 37 ± 20C for 24 hours. The specimens were tested to failure by a Instron® universal testing machine at a crosshead speed of 0.5 mm./min. Shear bond strength data (MPa) were analyzed with one-way ANOVA and Tukey’s multiple comparison test (p0.05) but higher mean shear bond strengths(p
ABSTRACT
All-ceramic fixed partial dentures have been increasing interest due to demand for esthetic and metal-free restorations of the patients. Yttrium tetragonal zirconia polycrystals has the highest mechanical properties, and promising long term clinical performance. Marginal fit of zirconia fixed partial dentures machined by CAD/CAM systems are lower than metal-ceramic fixed partial dentures but within the range of clinical acceptability. Success rates of frameworks in most studies were 100 % and survival rates were 73.9 - 100 %. The most common complications of zirconia fixed partial dentures were chipping of porcelain veneer. Within the limitations of these studies, conclude that zirconia 3 - 4 unit fixed partial dentures have sufficient stability for replacement of anterior and posterior teeth. Keywords: zirconia, fixed partial dentures, esthetic