Influence of Abutment Color and Mucosal Thickness on Soft Tissue Color.

Purpose: Zirconia (ZrO₂) and titanium nitride (TiN) implant abutments were introduced mainly for esthetic purposes, as titanium's gray color can be visible through mucosal tissues. This study was aimed at assessing whether ZrO₂ and TiN abutments could achieve better esthetics in comparison with titanium (Ti) abutments, regarding the appearance of soft tissues.

Materials And Methods: Ninety patients were included in the study.

3-Year Randomized Controlled Prospective Clinical Trial on Different CAD-CAM Implant Abutments.

Background: Zirconia abutments were introduced to restore esthetic regions and showed sufficient stability to support implant restorations. Nonetheless, to date the observation periods are shorter than those of titanium abutments.

Purpose: To assess the survival of implant crowns supported by computer aided design-computer aided manufacturing (CAD-CAM) abutments after 3 years.

Effect of different prosthetic abutments on peri-implant soft tissue. A randomized controlled clinical trial.

Purpose: This randomized clinical trial assessed the effect of three different prosthetic abutments (titanium, gold-hue titanium and zirconia) on peri-implant soft tissue 2 years after treatment in partially edentulous subjects.

Methods: Baseline data concerning (1) thickness of the buccal peri-implant soft tissue, (2) soft tissue thickness above the bone crest, (3) depth/length of transmucosal pathway, and (4) periodontal biotype at adjacent teeth were collected. The final sample consisted of 47 subjects (21 males, 26 females) with a total of 97 implants.

Radiological evaluation of the Cresco system in combination with Osseospeed implants: a preliminary 3-year report.

Aim: In this preliminary study, the 3-year radiological outcomes of Osseospeed implant-supported fixed complete or partial prostheses made with two different laboratory protocols were compared.

Methods: A convenience sample of 34 patients, who were either partially or completely edentulous in either jaw, were randomly assigned to two groups, of 17 patients each, using either a traditional laboratory protocol (control group) or the Cresco one (test group). The study's objective was an assessment of marginal bone loss around implants, measured on intraoral radiographs at 3-year follow-up.

A randomized controlled trial of endodontically treated and restored premolars.

This in vivo study examined the contribution of remaining coronal dentin and placement of a prefabricated (LP) or customized fiber post (ES) to the six-year survival of endodontically treated premolars. A sample of 345 patients provided 6 groups of 60 premolars each in need of endodontic treatment. Groups were classified according to the number of remaining coronal walls before abutment build-up.

Fatigue resistance and structural integrity of different types of fiber posts.

The study aimed at assessing and estimating the fatigue resistance of different fiber posts and to observe their ultrastructures through SEM. Six types of fiber posts were used: GC Fiber Post (Group 1), ParaPost Fiber White (Group 2), FibreKor (Group 3), DT Light-Post radiopaque (Group 4), FRC Postec (Group 5), and Luscent Anchors (Group 6). Ten out of 15 posts within each group were used for the fatigue test, and the other five were processed for SEM evaluation.

Sinus membrane elevation in combination with placement of blasted implants: a 3-year case report of sinus augmentation without grafting material.

Owing to the increasing use of dental implants to restore edentulous conditions, clinicians often face situations where available bone volumes are reduced and need to be augmented before implant placement. This is common in the posterior maxilla, where the presence of the maxillary sinus combined with severe atrophy of the bone crest, owing to long-standing edentulism or pathological conditions, might preclude implant placement. Techniques to augment the sinus floor in combination with several grafting materials are commonly used to restore adequate volumes for implantation.

Clinical studies of fiber posts: a literature review.

Purpose: This literature review aimed to find answers to relevant questions regarding the clinical outcome of endontically treated teeth restored with fiber posts.

Materials And Methods: All clinical studies published since 1990 in journals indexed in MEDLINE were retrieved by searching PubMed with the query terms "fiber posts and clinical studies." The reference list of the collected articles was also screened for further relevant citations.

Placement of fiber prefabricated or custom made posts affects the 3-year survival of endodontically treated premolars.

Purpose: To assess whether the amount of residual coronal dentin and the placement of a prefabricated (DT Light Post) (LP) or a customized fiber post (Ever Stick Post) (ES) have a significant influence on the 3-year survival of endodontically treated premolars.

Methods: A sample of 345 patients provided six groups of 60 premolars in need of endodontic treatment. Groups were defined based on the amount of dentin left at the coronal level after endodontic treatment and before abutment build-up.

How can droplet formation occur in endodontically treated teeth during bonding procedures?

Purpose: The aim of this in vivo study was to clarify how blistering formation occurs along intraradicular dentin bonded interfaces.

Materials And Methods: Patients were selected and post space was prepared in vivo in endodontically treated teeth. Post space was etched, dried with ethanol, and bonded with one of the following adhesive systems: All Bond 2, XP-Bond, Clearfil SE Bond, Xeno III.

XP BOND in self-curing mode used for luting porcelain restorations. Part B: Placement and 6-month report.

Purpose: The aim of this clinical study was to evaluate the postoperative hypersensitivity of Empress II inlays/onlays luted under clinical conditions with XP BOND in combination with SCA and Calibra cured in self-curing mode.

Materials And Methods: Fifty-three restorations were placed in 38 patients in March and April 2006. No patient received more than two restorations.

XP BOND in self-curing mode used for luting porcelain restorations. Part A: Microtensile test.

Purpose: To assess the bond strength to dentin of an experimental adhesive and the proprietary resin cement used in different curing modes to lute ceramic disks of different thicknesses.

Materials And Methods: Empress II disks (Ivoclar-Vivadent) were luted to dentin using XP BOND (Dentsply [XP]) in combination with the proprietary self-curing activator (SCA) and cement Calibra (Dentsply [C]). Curing of the adhesive was induced either by mixing with the activator (activator, groups 3 to 6) or by light irradiation for 20 s (group 2).

Long-term retrospective study of the clinical performance of fiber posts.

Purpose: To retrospectively evaluate the long-term clinical performance of three types of fiber posts after a service period of 7-11 years.

Methods: 985 posts were included in the study: 615 Composiposts, 160 AEstethic Posts and 210 AEsthetic Plus Posts were placed into endodontically treated teeth. Four combinations of dentin adhesives/luting materials were used.

Daytime use of a custom bleaching tray or whitening strips: initial and sustained color improvement.

Purpose: To compare the clinical response of 6% hydrogen peroxide whitening strips and a 10% carbamide peroxide custom tray system under common daytime usage conditions, in an Italian dental research center.

Methods: Informed consent and baseline measurements were collected, and 43 healthy adults were randomly assigned to 6% hydrogen peroxide whitening strips (Crest Whitestrips) or the 10% carbamide peroxide custom tray (Opalescence 10%). The maxillary arch was treated twice daily for 30 minutes at-home.

Post placement affects survival of endodontically treated premolars.

Clinical evidence is lacking regarding the influence of the amount of residual coronal dentin and of post placement on the failure risk of endodontically compromised teeth. The aim of this prospective clinical trial was to assess whether these factors significantly affect the two-year survival of restored pulpless premolars. A sample of 210 individuals provided six experimental groups of 40 premolars in need of endodontic treatment.

Clinical performance of fiber post restorations in endodontically treated teeth: 2-year results.

Purpose: This study evaluated the 2-year outcome of post-and-core restorative procedures in endodontically treated teeth. The effect of baseline factors (tooth type, number of residual coronal walls, and type of definitive restoration) on restoration failure was assessed.

Materials And Methods: The consecutive sample design included 150 patients.

Clinical trial evaluating the peroxide concentration response of whitening strips over 28 days.

Purpose: The research evaluated the peroxide concentration whitening response following self-directed use of whitening strips over a 28-day period.

Methods: A randomized, double-blind, parallel group clinical study was conducted. 37 healthy adult volunteers were randomly assigned to one of three groups based on tooth color at screening: 1.

Bonding to root canal: structural characteristics of the substrate.

Purpose: To evaluate in vitro the dentin morphology in root canals in terms of tubule orientation, density and increase in surface area after etching.

Materials And Methods: Thirty anterior teeth were divided in 3 groups at random: the samples of Group 1 were used to study tubular morphology in SEM. Groups 2 and 3 samples were etched with 32% phosphoric acid.

Bonding of all-porcelain crowns: structural characteristics of the substrate.

Objectives: The aim of this in vitro study was to evaluate the morphology of dentin in teeth prepared for single-unit all-porcelain crowns (SUAPC) in terms of tubule orientation, density and increase in surface area after etching.

Methods: Twenty anterior and 20 posterior teeth from adults were prepared 1mm below the cemento-enamel junction (CEJ) for SUAPC. The samples were divided into groups based on type of tooth (anterior or posterior) and bonding system employed.

Influence of tissue characteristics at margins on leakage of Class II indirect porcelain restorations.

Purpose: To evaluate the sealing ability of Class II porcelain inlays with margins placed in cementum-dentin and enamel, luted by two new different cementing materials.

Materials And Methods: Thirty extracted molars, free from caries and restorations, were selected. The sample cavities were prepared in a standardized manner and then were divided in three groups (n = 10) at random.

Clinical evaluation of a one-bottle bonding system for desensitizing exposed roots.

Purpose: To evaluate the effectiveness of a one-bottle adhesive system as a desensitizing treatment, with or without a prior phosphoric acid-etch step.

Materials And Methods: Two different clinical procedures using a one-bottle adhesive bonding system were tested for its efficacy on desensitizing exposed roots. Thirty subjects with a history of dentin hypersensitivity were selected and 60 exposed sensitive teeth were divided into two groups (n = 30).

Mapping of tubule and intertubule surface areas available for bonding in Class V and Class II preparations.

Objectives And Methods: The aim of this in vitro study was to evaluate the morphology of dentine in Class V and the Class II preparation walls in terms of tubule orientation, density and increase in surface area after conditioning. Six circular V-shaped preparations were cut at the cementum-enamel junction (CEJ) of anterior teeth and six Class II cavities with the cervical margin 1 mm below the CEJ were prepared in posterior teeth. The preparations were conditioned with 10% maleic acid.

Short-term assessment of leakage of Class V composite restorations placed in vivo.

The purpose of this study was to investigate the effectiveness of two dentin bonding systems, one of which was also in combination with a self-curing resin, when applied in V-shaped circular cavities cut in anterior teeth crossing the cementum-enamel junction. Twenty-seven teeth scheduled for extraction for periodontal reasons were treated in vivo. The sample teeth were divided at random into three groups.

Resistance of cementum in Class II and V cavities to penetration by an adhesive system.

Objectives: As the cervical margin located in cementum-dentin is still the most unpredictable area of an adhesive resin restoration, the aim of this investigation was to evaluate the morphology of the cementum layer at the cervical margins of Class V and Class II cavities and the impregnability of this layer to resin bonding systems.

Methods: Three different types of in vitro investigations of the cervical margins were performed by scanning electron microscopy: 1) direct anatomical observation of conditioned cavities; 2) observation of resin replicas; and 3) observation of resin infiltration. During direct observation, the presence of opened tubules was evaluated; in the resin replicas, the presence of resin tags and their density were observed; in the observation of resin infiltration, the presence of an acid-resistant interdiffusion was investigated.

Comparison of in vivo and in vitro demineralized dentin with phosphoric and maleic acid.

This article evaluated possible differences between dentin conditioned in vivo and in vitro with 10 percent maleic acid or with 36 percent phosphoric acid. Semispherical Class V cavities were prepared in vivo and in vitro at the cementum-enamel junction and were divided into four groups. After etching procedures, the in vivo samples were extracted and fixated in 10 percent buffered formaldehyde.