Does the use of a 3-mm extended tray during an at-home bleaching treatment increase gingival irritation? A randomized clinical trial.

Statement Of Problem: Gingival irritation is a common side effect of at-home bleaching, but how the design of the bleaching tray affects its occurrence is unclear.

Purpose: The purpose of this randomized clinical trial was to determine whether a direct relationship is present between the design of bleaching trays and the risk of gingival irritation during at-home bleaching treatments.

Material And Methods: This clinical trial was registered at ClinicalTrials.

Using a repositioning splint to determine reproducibility in the color registers of a dental spectrophotometer.

Objectives: The purpose of this study was to assess if the use of intraoral positioning guides could increase the reproducibility of color measurements with a dental spectrophotometer.

Methods: Twenty-three subjects were selected, and positioning guides for the maxillary arch of each participant were fabricated with clear 4 mm thermo-sheets. One orifice was made in the center of the clinical crown of the upper-right central incisor and another in the canine, with an external 6 mm diameter trephine.

Influence of treatment duration on the efficacy of at-home bleaching with daytime application: a randomized clinical trial.

Objective: The aim of this study is to determine whether prolonging the daytime at-home bleaching treatment by 1 week increases the bleaching effect without causing more side effects.

Materials And Methods: Fifty participants were randomly divided into two groups, (A) with a 14-day treatment and (B) with a 21-day treatment. A gel with 10% carbamide peroxide was applied for 2 h a day in custom trays.

Efficacy of different protocols for at-home bleaching: A randomized clinical trial.

Purpose: To evaluate the efficacy of two products used for at-home bleaching with different application times.

Methods: 80 participants were enrolled and divided into four groups, (1) 10% carbamide peroxide 1 hour a day; (2) 10% carbamide peroxide overnight; (3) 7.5% hydrogen peroxide 1 hour a day; and (4) 7.

Jaw biodynamic data for 24 patients with chronic unilateral temporomandibular disorder.

This study assessed 24 adult patients, suffering from severe chronic unilateral pain diagnosed as temporomandibular joint (TMJ) disorder (TMD). The full dentate patients had normal occlusion and had never received an occlusal therapy, i.e.

Long-term clinical evaluation of Dyract compomer in the restoration of non-caries cervical lesions: A 20-year retrospective study.

Objective: The restoration of non-caries cervical lesions has long been a challenge. Until recently, compomers were the restorative materials of choice. The aim of this in-vivo study was to evaluate the long-term clinical performance of Dyract restorations in non-caries cervical lesions.

Mechanical properties related to the microstructure of seven different fiber reinforced composite posts.

Purpose: The aim of this study was to evaluate the mechanical properties (bending strength and hardness) of seven different fiber reinforced composite posts, in relation to their microstructural characteristics.

Materials And Methods: Two hundred eighty posts were divided into seven groups of 40, one group for each type of post analyzed. Within each group, 15 posts were subjected to three-point bending strength test, 15 to a microhardess meter for the Knoop hardness, and 10 to Scanning Electron Microscope in order to determine the diameter of the fibers and the percentage of fibers embedded in the matrix.

Titanium posts and bonded amalgam core longevity: A 22-year clinical survival retrospective study.

Background: The authors conducted a retrospective study to evaluate the long-term (18-22 years) clinic results of titanium post and bonded amalgam core restorations with metal-ceramic crowns placed in patients.

Methods: From 1992 through 1996, the authors placed 88 restorations in 66 patients. They measured the ferrule effect in the minor dentin collar area.

A study of in vivo degradation of two vital home bleaching gels.

This study investigated hydrogen peroxide (H2O2) concentration of two home bleaching gels, in their dispensing syringes and their degradation in vivo in intraoral bleaching trays. Two bleaching gels were studied, 7.5% hydrogen peroxide (HP) and 20% carbamide peroxide (CP).

Treatment of enamel hypoplasia in a patient with Usher syndrome.

Background: Usher syndrome (USH) is a group of autosomal recessive diseases characterized by the association of retinitis pigmentosa with sensorineural hearing loss. There are three types of USH. In addition, in people with USH and hypoplasia, the thickness of the enamel is reduced.

Relationship between lactate dehydrogenase activity in saliva and oral health status.

Objective: Lactate dehydrogenase (LDH) activity in serum increases as a marker of cellular necrosis. LDH activity in saliva could constitute a specific indicator of oral mucosal lesions with tissue breakdown including periodontal disease. The aim of this study was to determine LDH activity in saliva, assessing inter-individual variations with regard to the oral health status.

Direct composite coronal reconstruction of two fractured incisors: an 8-year follow-up.

Dental fractures of the anterior teeth are a relatively frequent accident during childhood. However until maxillary maturation is completed, the employment of porcelain crowns is not recommended, the treatment of choice, instead, would be direct composite restoration. The procedure for restoration of two extensive superior central incisor fractures is presented.

Effect of ultrasonic scaling on salivary lactate dehydrogenase.

Purpose: To determine Lactate Dehydrogenase Activity (LDHA) in whole saliva in individuals with periodontal disease and the effect of ultrasonic scaling on this enzyme activity.

Methods: A study group of 50 patients with PD (Community Periodontal Index of Treatment Needs > or = 3) was selected at random. Half of the patients (n=25) received ultrasonic periodontal treatment (Group 1).

A standardised protocol for the quantification of lactate dehydrogenase activity in saliva.

Unlabelled: The literature about salivary lactate dehydrogenase (LDH) activity shows different results, conditioned by the diversity of methods used for sampling, handling and analysis.

Objectives: The aim of this study was to design a protocol for quantifying salivary lactate dehydrogenase activity.

Methods: Whole saliva samples were collected from 100 healthy volunteers by chewing a roll of cotton.