Color masking measurement for ceramic coating of titanium used for dental implants.

Statement Of Problem: Poor implant placement or thin gingival tissue and progressive bone resorption may lead to the dark metal color showing through the peri-implant soft tissue. Whether the dark color can be adequately masked is unclear.

Purpose: The purpose of this in vitro study was to test the color masking effect of porcelain applied on titanium used in fabricating the polished collar of tissue level implants.

Failure torque of ceramic neck titanium implant.

Statement Of Problem: Dental implants are typically made of titanium. However, with the current systems on the market, the implant neck often shows through the gingival tissues as a black or dark gray line and/or as a grayish discoloration of the peri-implant soft tissue.

Purpose: The purpose of this in vitro study was to test a new implant design.

A new premixed self-etch adhesive for bonding orthodontic brackets.

Objective: To determine if a new premixed self-etch adhesive can be used to successfully bond orthodontic brackets to enamel.

Materials And Methods: Forty human molars were cleaned, mounted, and randomly divided into two groups. In group 1, 20 teeth were conditioned using the self-etching primer Transbond Plus (3M Unitek, Monrovia, Calif).

Evaluation of a new nano-filled restorative material for bonding orthodontic brackets.

Aim: To compare the shear bond strength of a nano-hybrid restorative material, Grandio (Voco, Cuxhaven, Germany), to that of a traditional adhesive material (Transbond XT; 3M Unitek, Monrovia, CA, USA) when bonding orthodontic brackets.

Material And Methods: Forty teeth were randomly divided into 2 groups: 20 teeth were bonded with the Transbond adhesive system and the other 20 teeth with the Grandio restorative system, following manufacturer's instructions. Student t test was used to compare the shear bond strength of the 2 systems.

Core buildup repair using a clear matrix: a case report and clinical technique.

The fracture of core buildup material is common in dental practice. This article describes a core buildup repair technique utilizing a custom matrix. This technique enables the dentist to reestablish the original contour and alignment of the broken core buildup and assures excellent crown fit in a short amount of time with a predictably successful outcome.

Early shear bond strength of a one-step self-adhesive on orthodontic brackets.

Objective: The purpose of this study was to determine whether a self-adhesive universal cement, RelyX Unicem (3M ESPE, Seefeld, Germany), can be used successfully to bond orthodontic brackets to enamel.

Materials And Methods: Forty human molars were cleaned, mounted, and randomly divided into two groups: 20 orthodontic brackets were bonded to teeth using RelyX Unicem, and 20 brackets were bonded using the Transbond XT (3M Unitex, Monrovia, Calif) adhesive system. The teeth were debonded within 30 minutes after initial bonding using a universal testing machine.

Comparison of shear bond strength of two self-etch primer/adhesive systems.

Orthodontic brackets adhesive systems use three different agents, an enamel conditioner, a primer solution, and an adhesive resin. A unique characteristic of some new bonding systems is that they combine the conditioning, priming, and adhesive agents into a single application. The purpose of this study was to assess and compare the effects of using one-step and two-step self-etch primer/adhesive systems on the shear bond strength of orthodontic brackets.

Waterline disinfectant effect on the shear bond strength of orthodontic brackets.

The purpose of this study was to determine whether the use of an iodine compound for disinfecting the waterlines in dental units has an effect on the shear bond strength of orthodontic brackets bonded to enamel. Forty molar teeth were divided randomly into two groups- group 1 control: twenty teeth were etched for 15 seconds with 35% phosphoric acid, washed with a distilled water spray for 10 seconds, stored in distilled water for 5 minutes, dried to a chalky white appearance, and the sealant applied to the etched surface; group 2 experimental: twenty teeth were etched for 15 seconds with 35% phosphoric acid and washed for 10 seconds with water containing iodine. The teeth were stored for five minutes in the iodinated water, dried to a chalky white appearance, and the sealant applied to the etched surface as in the control group.

The effect of tooth bleaching on the shear bond strength of orthodontic brackets.

Introduction: The purpose of this study was to determine the effect of enamel bleaching on the shear bond strength of orthodontic brackets bonded with a composite adhesive.

Methods: Two protocols were used on 60 human molars. In the at-home bleaching group (n = 30), Opalescence bleaching agent (Ultradent, South Jordan, Utah), which contains 10% carbamide peroxide, was brushed onto the teeth daily for 14 days and left for 6 hours each day.

The effect of porcelain surface conditioning on bonding orthodontic brackets.

The purpose of this study was to evaluate the effects of a new self-etching primer/ adhesive used to enhance the shear strength of orthodontic brackets bonded to porcelain surfaces. Forty-five porcelain maxillary central incisor teeth were used in the study. The teeth were divided randomly into three groups: group I (control), the porcelain teeth were etched with 37% phosphoric acid followed by a sealant and the brackets were bonded with a composite adhesive; group II, the porcelain teeth were microetched and hydrofluoric acid and silane applied and metal brackets were then bonded with the composite adhesive; and group III, the porcelain teeth were etched with phosphoric acid and a self-etching primer/adhesive applied before bonding.

Conservative inlay fixed partial denture: a clinical and laboratory technique.

Fiber-reinforced composite (FRC) fixed partial dentures (FPDs) offer a clinical alternative for the restoration of single missing teeth and short-span posterior and anterior FPDs. This treatment modality is conservative and cost-efficient. The continuous improvement of adhesives and resin-based composite systems makes this type of restoration successful with good esthetic and functional results.

Comparison of bonding time and shear bond strength between a conventional and a new integrated bonding system.

Conventional adhesive systems use 3 different agents, an enamel conditioner, a primer solution, and an adhesive resin during the bonding of orthodontic brackets to enamel. A characteristic of some new bonding systems is that they combine the conditioning and priming agents into a single application as well as precoat the bracket with the adhesive in an attempt to save time during the bonding procedure. This study compared the total bonding time and shear bond strength (SBS) of 2 bracket-bonding systems: (1) an integrated system that incorporates a self-etching primer and precoated brackets and (2) a conventional system in which the etchant and primer are applied separately and the adhesive applied to the bracket by the clinician.

Bonding orthodontic brackets to porcelain using different adhesives/enamel conditioners: a comparative study.

Aim: To evaluate the use of new adhesive/primer materials, including an experimental self-etch primer and a cyanocrylate adhesive, to enhance the shear strength of orthodontic brackets bonded to porcelain surfaces.

Material And Methods: Sixty porcelain maxillary central incisor teeth were used. The teeth were randomly divided into four groups: group 1, teeth were etched with 37% phosphoric acid and the brackets were bonded with a composite adhesive; group 2, teeth were microetched, hydrofluoric acid and silane applied, and then the brackets were bonded with a composite adhesive; group 3, an acid-etch primer was used, then the brackets were bonded with the same composite adhesive as in the first 2 groups; group 4, teeth were etched with 35% phosphoric acid and the brackets were bonded with the cyanoacrylate adhesive.

The use of Ormocer as an alternative material for bonding orthodontic brackets.

As new adhesives, composite resins, and bonding techniques were introduced, orthodontists adopted some of these innovations and added them to their armamentarium. The purpose of this study was to compare the shear bond strength (SBS) of two adhesive materials; one with an organically modified ceramic matrix, Admira (Voco, Cuxhaven, Germany) and another that contains the traditional Bis GMA matrix namely Transbond XT (3M Unitek, Monrovia, Calif). The new materials have a lower wear rate and are more biocompatible than traditional composites.

Effect of water storage on the shear bond strength of a cyanoacrylate adhesive: clinical implications.

Aim: To compare the effects of water storage on the shear bond strength of a cyanoacrylate adhesive system at three time intervals: (1) within 30 minutes after bonding the bracket to the tooth; (2) 24 hours from the time of bonding; and (3) after 30 days of storage in water at 37 degrees C.

Methods: Sixty freshly extracted human molars were collected and stored in a solution of 0.1% (weight/volume) thymol.

Evaluation of modifying the bonding protocol of a new acid-etch primer on the shear bond strength of orthodontic brackets.

The purpose of the study was to evaluate the shear bond strength of orthodontic brackets when light curing both the self-etch primer and the adhesive in one step. Fourty eight teeth were bonded with self-etch primer Angel I (3M/ESPE, St Paul, Minn) and divided into three groups. In group I (control), 16 teeth were stored in deionized water for 24 hours before debonding.

The effect of variation in mesh-base design on the shear bond strength of orthodontic brackets.

This study compared the shear bond strengths of two metallic orthodontic brackets, one with a single-mesh bracket base and the other with a double-mesh bracket base. The Transbond XT adhesive system was used to bond all brackets to the teeth. Two types of brackets were compared, ie, 20 Ovation metal bracket series, with a double-mesh base (Super-mesh) and an 81.

Comparison of the shear bond strength of 2 self-etch primer/adhesive systems.

Conventional adhesive systems use 3 different agents-an enamel conditioner, a primer solution, and an adhesive resin for bonding orthodontic brackets to enamel. A unique characteristic of some new bonding systems in operative dentistry is that they combine the conditioning and priming agents into a single application. Combining conditioning and priming saves time and should be more cost-effective to the clinician and indirectly to the patient.

Evaluation of a new curing light on the shear bond strength of orthodontic brackets.

With the introduction of photosensitive (light-cured) restorative materials in dentistry, various methods were suggested to enhance their polymerization and to shorten the curing time including layering and the use of more powerful light-curing devices. The purpose of this study was to determine the effect of using a new light-curing apparatus that uses a light-emitting diode (LED) on the shear bond strength of an orthodontic adhesive. The new light-curing apparatus used in the study was UltraLume 2 (Ultradent USA, South Jordan, Utah) that has an 8-mm footprint and can simultaneously cure two orthodontic brackets.

The effect of blood contamination on the shear bond strength of orthodontic brackets with the use of a new self-etch primer.

The success of bonding brackets to enamel with resin bonding systems is negatively affected by contamination with oral fluids such as blood and saliva. The new self-etch primer systems combine conditioning and priming agents into a single application, making the procedure more cost-effective. The purpose of this study was to assess the effect of blood contamination on the shear bond strength of orthodontic brackets with a new self-etch primer.

Effect of thermocycling on the shear bond strength of a cyanoacrylate orthodontic adhesive.

The purpose of this study was to evaluate the effects of thermocycling on the shear bond strength of a cyanoacrylate adhesive system, specifically 24 hours after bonding when the adhesive has achieved most of its bond strength and after thermocycling. Forty freshly extracted human molars were collected and stored in a solution of 0.1% (weight/volume) thymol.

The effect of saliva contamination on shear bond strength of orthodontic brackets when using a self-etch primer.

The purpose of this study was to assess the effect of saliva contamination on the shear bond strength of orthodontic brackets, at various stages of the bonding procedure using a new self-etch primer. Brackets were bonded to 52 extracted human molars according to one of the following four protocols. Group I (uncontaminated control): A self-etch acidic primer, Angel I (3M/ESPE Minneapolis, Minn) was placed on the enamel for 15 seconds, gently dried with air, and light cured for 10 seconds.

Effects of modifying the adhesive composition on the bond strength of orthodontic brackets.

In an attempt to save chair time during bonding, metal brackets have been precoated with the adhesive material. Although the adhesive used on the precoated brackets is basically similar in composition to that used for bonding uncoated brackets, there are differences in the percentages of the various ingredients incorporated in the material. These changes are intended to enhance specific clinical properties.

Shade-match perception of porcelain-fused-to-metal restorations: a comparison between dentist and patient.

Background: Patient satisfaction with the shade match of restorations has not been appraised carefully in the dental literature. This study compared patients' and a prosthodontist's satisfaction with the shade o f existing porcelain-fused-to-metal, or PFM, restorations.

Methods: The authors selected a convenience sample of 212 patients for this study.