Cemented implant restoration: A technique for minimizing adverse biologic consequences.

The purpose of this technique was to eliminate excess cement from the implant restoration by using a 2-step cementation process. A custom acrylic resin abutment, a duplicate of the titanium abutment, is fabricated before the restoration is cemented. At cementation, cement is placed inside the restoration, which is placed onto the acrylic resin abutment outside the mouth.

Occlusal errors generated at the maxillary incisal edge position related to discrepancies in the arbitrary horizontal axis location and to the thickness of the interocclusal record.

Statement Of Problem: Determining the arbitrary transverse horizontal axis by using anatomic landmarks is a simpler clinical procedure than locating the kinematic transverse horizontal axis; however, accuracy may vary depending on individual patient anatomy.

Purpose: The purpose of this study was to investigate an arbitrary transverse horizontal axis relative to the maxillary incisal edge and to examine the magnitude of occlusal error produced when this arbitrary transverse horizontal axis is used to mount casts in an articulator.

Material And Methods: Seventy-three adults (43 men, 30 women) participated in this study.

Reconsidering remineralization strategies to include nanoparticle hydroxyapatite.

Dental caries is a transmissible biofilm-mediated disease of the teeth that is defined by prolonged periods of low pH resulting in net mineral loss from the teeth. Hydroxyapatite, fluorapatite, and the carbonated forms of calcium phosphate form the main mineral content of dental hard tissues: enamel, dentin, and cementum. Active dental caries results when the biofilm pH on the tooth surface drops below the dissolution threshold for hydroxyapatite and fluorapatite.

Effects of cyclic fatigue stress-biocorrosion on noncarious cervical lesions.

Problem: Although there is a high prevalence of noncarious cervical lesions (NCCLs), the etiology of these lesions remains contentious.

Purpose: To evaluate the combined effects of cyclic fatigue stress and biocorrosion activity on NCCLs.

Materials And Methods: Extracted premolar teeth were allocated into four groups (N = 10).

Evaluation of fracture resistance and failure risks of posterior partial coverage restorations.

Statement Of Problem: Interest in posterior partial coverage restorations has increased because these restorations provide a more conservative treatment option than traditional cohesively based restorations; however, material selection has been a controversial topic in the current literature.

Purpose: To evaluate the fracture resistance of posterior partial coverage restorations restored with different materials, examine their stress distribution, and calculate failure risks using three-dimensional (3D) finite element analysis.

Methods: Sixty extracted third molar teeth received 2-mm occlusal reduction maintaining cusp steepness of 45 degrees relative to occlusal surface.

Comparison of load-fatigue performance of posterior ceramic onlay restorations under different preparation designs.

Objective: The objective of this study was to evaluate the load-fatigue performance of posterior ceramic onlay restorations relative to two variables: preparation design (with or without buccal veneers); and the existing amount of tooth structure (non-worn tooth, worn tooth).

Methods: Sixty extracted third molars were divided into five groups. One group received a mesial-occlusal-distal (MOD) gold onlay restoration (control).

Effect of abutment tooth color, cement color, and ceramic thickness on the resulting optical color of a CAD/CAM glass-ceramic lithium disilicate-reinforced crown.

Statement Of Problem: A dark-colored prepared abutment tooth may negatively affect the esthetic outcome of a ceramic restoration if the tooth is restored using translucent enamel-like ceramic materials.

Purpose: The purpose of this study was to evaluate the cumulative effect that the tooth abutment color, cement color, and ceramic thickness have on the resulting optical color of a CAD/CAM glass-ceramic lithium disilicate-reinforced crown.

Material And Methods: A CAD/CAM glass-ceramic lithium disilicate-reinforced monolithic crown (IPS e.

Comparison of load-fatigue testing of ceramic veneers with two different preparation designs.

The concept of tooth preparation for ceramic veneers remains controversial regarding whether the use of a palatal chamfer would affect the longevity of restorations. This study aimed to evaluate the load-fatigue testing of ceramic veneers using two different preparation designs-an incisal shoulder finish line with or without a palatal chamfer. A pressable ceramic veneer was bonded to the prepared maxillary central incisor using resin cement.

The effect of different powder particle size on mechanical properties of sintered alumina, resin- and glass-infused alumina.

In this study, the compaction and sintering behavior of fine alumina powders of different particle sizes and the effect of matrix particle size on biaxial strength and fracture toughness of infused matrices were investigated. Three different alumina powders, In-Ceram alumina, A16SG, and RC172 were selected, representing a range of particle size and shape. RC172 and A16SG were dry-pressed.

The effects of tooth preparation cleansing protocols on the bond strength of self-adhesive resin luting cement to contaminated dentin.

This in vitro study evaluated the bond strength of a self-adhesive luting cement after using four different techniques to remove surface contamination on dentin. Extracted human molars were flattened to expose the dentin surface and prepared for full crown preparation. Acrylic temporary crowns were fabricated and placed using temporary cement.

The effect of hydrofluoric acid surface treatment and bond strength of a zirconia veneering ceramic.

Statement Of Problem: Clinicians are frequently faced with a challenge in selecting materials for adjacent restorations, particularly when one tooth requires a zirconia-based restoration and the next requires a veneer. While it may be desirable to use the same veneering ceramic on adjacent teeth, little information is available about the use of veneering ceramics over a zirconia-based material.

Purpose: The purpose of this study was threefold: (1) to study the influence of hydrofluoric acid-etched treatment on the surface topography of the zirconia veneering ceramic, (2) to test the bond strength of zirconia veneering ceramic to enamel, and (3) to evaluate the flexural strength and the elemental composition of ceramic veneers.

Removable partial denture design using milled abutment surfaces and minimal soft tissue coverage for periodontally compromised teeth: a clinical report.

This clinical report describes the treatment of a partially edentulous patient with periodontally compromised teeth using a combination of single crowns and a removable partial denture (RPD). The RPD was designed to combine the benefits of milled surfaces and hygienic principles while allowing modification and addition of artificial teeth, should natural teeth be lost.