[Three-dimensional finite element analysis of implant restoration in aesthetic zone of resin-ceramic composite single crown].

Purpose: To observe and compare the stress distribution of implant, crown, abutment and surrounding bone tissues in the aesthetic zone after restoration of resin-ceramic composite single crown, and provide theoretical basis for clinical restoration.

Methods: Three-dimensional finite element models of alveolar bone, implant, crown, and the thickness of different adhesives between crown and abutment (0.05 mm and 0.

[Effects of ultra thin porcelain veneers in repair of anterior teeth gaps].

Purpose: To evaluate the clinical effect of ultra thin porcelain veneers in the repair of the anterior teeth gaps.

Methods: The anterior teeth gaps in 42 patients were repaired from 2013 to 2014 with ultra thin porcelain veneers ,the clinical results of 145 porcelain veneers were evaluated at 6,12,24 and 36 months after repair.

Results: Thirty six months after repair, 145 ultra thin porcelain veneers were successful retained, 99.