نتایج جستجو برای: crowns
تعداد نتایج: 4678 فیلتر نتایج به سال:
The purpose of the present study is to evaluate the fracture load of composite-based repairs to fractured zirconium oxide (Z) crowns and to ceramic-fused-to-metal (CM) crowns, comparing different mechanical surface preparation methods. A total of 75 crowns were repaired; samples then underwent dynamic loading and thermocycling. Final fracture load values for failure of the repaired crowns were ...
STATEMENT OF PROBLEM Monolithic zirconia crowns fabricated with computer-aided design and computer-aided manufacturing (CAD-CAM) have recently become a common practice for the restoration of posterior teeth. The marginal fit of monolithic zirconia crowns may be affected by different cement space parameters set in the CAD software. Information is scarce regarding the effect of cement space on th...
STATEMENT OF PROBLEM In some clinical situations, the length of either a prepared tooth or an implant abutment is shorter than ideal, and the thickness of a porcelain crown must be increased. Thickness of the coping and the veneering porcelain should be considered to prevent mechanical failure of the crown. PURPOSE The purpose of this study was to investigate the influence of veneering porcel...
Background and Aims: Marginal fit is one of the key factors in the success of fixed restoration. The aim of this study was to evaluate the fitness of feldespatic crowns made from additional silicon impression and gypsum cast by CAD/CAM. Materials and Methods: 10 intact extracted upper premolar teeth were used for this experimental study. After preparation of the mounted teeth with radial sh...
Less Light Transmitted Through Zirconia Copings Translucency of Zirconia Copings Made With Different
Background: There is increased use of all-ceramic crowns in place of ceramo-metal crowns in restorative practices. The difference in properties of different ceramics will affect the final esthetics of the restoration, and we need to consider this, especially when restoring anterior teeth. This article compares and analyzes translucency levels of different zirconia-based ceramic CAD/CAM systems....
background: fracture load of implant-supported restorations is an important factor in clinical success. this study evaluated the effect of two techniques for screw access hole preparation on the fracture load of cement-screw retained implant-supported zirconia-based crowns. methods: thirty similar cement-screw retained implant-supported zirconia-based maxillary central incisor crowns were evalu...
Effects of convergence of the axial walls on the retention of full veneer crowns Dr. F. Nejati Danesh* - Dr. M. Savabi ** - Dr. R. Darabi*** *- Assistant Professor of Dental Prosthodontics Dept. - Faculty of Dentistry – Isfahan University of Medical Sciences. **- Assistant Professor of Dental Prosthodontics Dept. Faculty of Dentistry – Isfahan University of Medical Sciences. ***- Resident of De...
PURPOSE The goal of this study is to assess the survival, marginal bone loss and complications around single-tooth implants on which immediate provisionalization was carried out. PATIENTS AND METHODS 78 implants were placed in 57 patients: 56 after extraction and 22 in healed sockets. Immediately after surgery provisional crows were delivered without contacts in both centric and excursive jaw...
The polishing step of teeth preparations for crowns is a step often performed, so that there is an increased time during the clinical procedure. The aim of this study is to evaluate the marginal and internal adaptation of all-ceramic CAD/CAM lithium disilicate crowns in polished preparations for crown and nonpolished preparations for crowns. For this purpose, 20 first molars were selected, whic...
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