feldspar and Tooth-Discoloration

Topics: Aluminum Silicates; Anti-Bacterial Agents; Cuspid; Dental Materials; Dental Porcelain; Dental Veneers; Female; Gingival Retraction Techniques; Humans; Incisor; Middle Aged; Potassium Compounds; Tetracycline; Tooth Discoloration; Tooth Preparation, Prosthodontic; Zirconium

Topics: Acid Etching, Dental; Aluminum Silicates; Composite Resins; Dental Care; Dental Caries; Dental Materials; Dental Porcelain; Dental Restoration, Permanent; Dental Veneers; Esthetics, Dental; Female; Follow-Up Studies; Humans; Malocclusion; Patient Care Planning; Patient Satisfaction; Potassium Compounds; Resin Cements; Resins, Synthetic; Smiling; Tooth Discoloration

The aim of the present study was to compare the marginal fidelity and surface roughness of porcelain veneers fabricated by the refractory die and pressing techniques under in vivo conditions.. A total of 72 veneers were prepared for anterior teeth in 12 participants. Veneers on anterior teeth in the first and second quadrants were fabricated using refractory die (group I) and pressing techniques (group II), respectively. Surface roughness was evaluated using a profilometer in three areas (cervical, mesio-incisal, disto-incisal) for each veneer. Marginal adaptation of all the veneers (N = 36/group) was evaluated at each margin (cervical, incisal, mesial, and distal) at 7 days and at 3 months after cementation under a scanning electron microscope (SEM) at 200× magnification.. The mean surface roughness of veneers in cervical, mesio-incisal, and disto-incisal areas was 0.41 ± 0.25, 0.33 ± 0.14, and 0.32 ± 0.14 μm, respectively, for group I; and 0.31 ± 0.11, 0.36 ± 0.18, and 0.29 ± 0.11 μm, respectively, for group II. Intra- and intergroup comparisons showed no statistically significant values for all areas (p > 0.05). In 144 margins evaluated for each group, a visible gap was present in 15 (10.4%) and 18 (12.5%) recordings at 7 days for groups I and II, respectively. They increased to 19 (13.1%) and 20 (13.8%) after 3 months. These gaps were further broken down into percent distribution of total recordings at the cervical, incisal, mesial, and distal margins. Intragroup comparison was made using the Cochrane test. The chi-square test and Fisher's exact test were used for intergroup comparison of margins, revealing no statistical difference (p > 0.05) CONCLUSION: Within the limitations of the study, the surface roughness and marginal fidelity of porcelain veneers fabricated by refractory die technique and pressing technique were comparable.

Topics: Adult; Aluminum Silicates; Cementation; Ceramics; Dental Casting Technique; Dental Marginal Adaptation; Dental Polishing; Dental Porcelain; Dental Prosthesis Design; Dental Veneers; Female; Follow-Up Studies; Humans; Male; Microscopy, Electron, Scanning; Potassium Compounds; Resin Cements; Surface Properties; Tooth Discoloration; Young Adult

"No-prep" porcelain veneers have been effectively in use for more than two decades, and the bonding of porcelain to 100% enamel has enjoyed extraordinary success. Today's refined techniques, new and improved materials, and better training in emulating nature have enabled additive-only veneers to rival, or in some cases even exceed, the results of traditionally prepared veneers. In this case presentation, the author uses conservative, additive-only dentistry to enhance a young woman's smile by creating improved anterior esthetics.

Topics: Adult; Aluminum Silicates; Composite Resins; Dental Bonding; Dental Porcelain; Dental Prosthesis Design; Dental Restoration, Temporary; Dental Veneers; Diastema; Esthetics, Dental; Female; Follow-Up Studies; Humans; Occlusal Adjustment; Patient Care Planning; Potassium Compounds; Smiling; Tooth Discoloration