Purpose: To evaluate marginal bone loss (MBL) of dental implants inserted in active lichen planus patients.
Materials And Methods: The study included 59 subjects divided into 3 groups depending on their lichen planus diagnosis and administration of a low dose of corticosteroids: 17 healthy individuals, 20 controlled lichen planus patients controlled using low doses of systemic corticosteroids, and 22 noncontrolled lichen planus patients. During 4-year follow-up sessions MBL was evaluated, and biopsies were collected from lichen planus patients and examined.
Purpose: To propose a treatment protocol for management of implant candidates suffering from active lichen planus.
Materials And Methods: Twenty-three patients who were diagnosed with active lichen planus were referred to a dental practice seeking dental implants. Patients received dental implants using open flap technique and sequential osteotomy.
Objective: To investigate the influence of translucency of CAD/CAM ceramic milling blocks on the final color of porcelain veneer cemented using resin cement with two different opacities.
Materials And Methods: A standardized incisal lap preparation was made on a maxillary right central incisor that was duplicated using composite resin material (Z250, A4, 3M ESPE). The resin dies were individually laser scanned (Bluecam, Sirona) in order to build a 3D model of the porcelain veneer on the CAD software (Cerec 3D).
Objective: To assess step by step the associated cumulative damage introduced in zirconia veneered restorations after long term cyclic loading using a new multi-level strain accommodating loading protocol.
Methods: 40 zirconia veneered crowns received thermal and cyclic loading (3.5 million cycles at maximum load of 25 kg representing 70% of the critical load of the veneer ceramic).
Objectives: The aim of this study was to evaluate the internal adaptation and marginal properties of ceramic laminate veneers fabricated using pressable and machinable CAD/CAM techniques.
Materials And Methods: 40 ceramic laminate veneers were fabricated by either milling ceramic blocks using a CAD/CAM system (group 1 n=20) or press-on veneering using lost wax technique (group 2 n=20). The veneers were acid etched using hydrofluoric acid, silanated, and cemented on their corresponding prepared teeth.
Objective: Bond strength limitations of adhesive zirconia restorations have stood as a barrier against their widespread use. Selective infiltration etching is a new surface treatment that enhances bonding to zirconia-based materials. Beside bond strength, the performance of adhesive zirconia restorations could be affected by other variables.
View Article and Find Full Text PDFJ Biomed Mater Res B Appl Biomater
January 2009
The purpose of this study was to explore the effects of airborne-particle abrasion and selective infiltration etching of a yttrium-partially stabilized tetragonal zirconia polycrystal (Y-TZP) implant surfaces on nerve conduction. Particle-abraded Y-TZP (P/Y-TZP), selective infiltration etched Y-TZP (SIE/Y-TZP), and commercially pure titanium (CP-Ti) were used in the study (n = 5).The compound action potentials of the right and left sciatic nerves of eight sacrificed rats were quantified at the in vitro level.
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