Stepwise stress testing of different CAD-CAM lithium disilicate veneer application methods applied to lithium disilicate substructures.

Statement Of Problem: Whether a computer-aided design and computer-aided manufacture (CAD-CAM) fabricated high-translucency lithium disilicate veneer on a lithium disilicate substructure would increase the strength of the restoration compared with a traditional feldspathic porcelain veneer is unclear.

Purpose: The purpose of this in vitro study was to evaluate the effect of different lithium disilicate veneer application methods on a lithium disilicate substructure on their biaxial flexural stress (BFS).

Material And Methods: Lithium disilicate disks were fabricated so that when combined with the veneering disks, they had a dimension of 12×1.

Monitoring of simulated occlusal tooth wear by objective outcome measures.

Objectives: This in vitro study explored quantitative outcome measures as clinical indicators of simulated occlusal tooth wear progression.

Methods: Ten sound, extracted human premolars were selected and submitted to occlusal tooth wear simulation in 0.5-mm steps (0/0.

Clinical evaluation of a universal adhesive in non-carious cervical lesions.

Objectives: To compare the clinical performance of a universal adhesive in class V non-carious cervical lesions (NCCLs) using two surface treatment protocols (self-etch [SfE] vs selective-enamel-etch [SelE]).

Material And Methods: Thirty-three adults, each with ≥2 NCCLs, received one resin composite restoration utilizing a SfE universal adhesive and another utilizing the adhesive and SelE with 37% phosphoric acid. Restorations were evaluated for sensitivity, retention, marginal discoloration, marginal adaptation, and clinical acceptability through 24 months using Cochran-Mantel-Haenszel tests for stratified, ordered categorical outcomes.

Retrospective assessment of caries experience among US Naval Academy midshipmen.

Objective: To assess the 4-year caries incidence among US Naval Academy midshipmen.

Methods: Dental records (n = 300) from a total population of 1,016 midshipmen from the 2011 graduating class at US Naval Academy, Annapolis, MD, were randomly selected for review. Patients were assigned a caries risk status based on the number of caries lesions recorded at initial examination (low = 0 lesions; moderate = 1-2 lesions; high = 3+ lesions).

An evaluation of U.S. Navy Dental Corps classification guidelines.

Objectives: The aims of this research were to evaluate the effectiveness of two different sets of dental classification guidelines to differentiate dental emergency (DE) rates between deployable and nondeployable personnel.

Methods: A retrospective study of the dental records of two cohorts of Marine Corps recruits examined and treated using different classification guidelines was completed.

Results: Both classification systems showed significant differences between DE rates of nondeployable and deployable personnel.

An evaluation of replacement rates for posterior resin-based composite and amalgam restorations in U.S. Navy and marine corps recruits.

Background: Restoration replacement is a clinical concern that has not been studied among military personnel. The authors determined the prevalence of placement of posterior amalgam and resin-based composite restorations and the incidence of replacement among U.S.

A statistical method to evaluate dental classification systems used by military dental services.

Unlabelled: The aim of this research project was to develop a systematic approach to evaluate the effectiveness of dental classifications used by military dental services to predict dental emergencies.

Design: A retrospective cohort study of U.S.

Caries remineralization therapy: implications for dental readiness.

Caries remineralization therapy can effectively arrest or reverse the progression of incipient proximal caries lesions. Remineralization of tooth structure is accomplished via a series of topical fluoride applications over time using a combination of both in-office and at-home fluoride agents. Remineralization therapy should be considered a viable noninvasive alternative to restoration for all caries lesions that do not exhibit frank cavitation of the proximal enamel surface (i.

Periodontal health status in a cohort of young US Navy personnel.

Objectives: Neither the prevalence of periodontal disease nor long-term trends in periodontal health among US military personnel has been well studied. The authors analyzed dental records to assess the prevalence and severity of periodontal disease, characterize changes in periodontal health, and determine the associations of age, race, gender, and tobacco use with periodontal status among US Navy personnel.

Methods: Dental records from 1,107 personnel who entered military service in 1997 were gathered from eight US Navy dental treatment facilities.

Effects of five thermal stressing regimens on the flexural and bond strengths of a hybrid resin composite.

Unlabelled: Thermocycling is commonly employed in laboratory studies to simulate the in vivo aging of restorative materials. However, there is little consistency in the regimens used, and some researchers have questioned the clinical relevance and, hence, the necessity of including thermal stressing in in vitro protocols. This study examined the effects of five thermal stressing regimens on the flexural and dentin bond strengths of a hybrid resin composite.

Dental sealant longevity in a cohort of young U.S. naval personnel.

Background: The U.S. Navy emphasizes caries prevention and encourages the placement of dental sealants on the caries-susceptible teeth of patients at risk of developing caries.

Effect of three direct restorative materials on molar cuspal fracture resistance.

Purpose: This study compared the cusp fracture strength of molars restored using a condensable resin composite with that of teeth restored with conventional amalgam, a bonded amalgam, and an incrementally placed resin composite.

Methods: Standardized MOD cavity preparations (2/3 the buccal-lingual dimension x 4 mm deep) were made in 50 extracted human molars and restored as follows (n = 10): (1) a packable posterior resin composite; (2) an incrementally placed microfilled posterior resin composite; (3) a spherical particle amalgam alloy; (4) spherical amalgam with a dentin adhesive liner and (5) no restoration (preparation only; negative control). A sixth group of intact molars (n = 10) served as a positive control.

Light output of disposable vs. nondisposable curing light tips following high-level disinfection.

Following a pilot study which determined that autoclaving a disposable tip resulted in physical deformation, rendering the tip ineffective for photocuring, this study evaluated the effects of two FDA-cleared high-level disinfectants on the light output and physical integrity of disposable and nondisposable curing light tips. Nine disposable and five nondisposable curing tips were immersed in each of the two disinfectants. No significant differences (p > 0.

Effects of daily fluoride exposures on fluoride release by glass ionomer-based restoratives.

It is well documented that glass ionomer cements absorb and release fluoride following single fluoride exposures. This study examined fluoride release among three glass ionomer-based restorative materials following multiple daily exposures to three topical fluoride regimens. Using a Delrin mold, 32 cylindrical specimens, each of a glass ionomer (Ketac-Fil), resin-modified glass ionomer (Photac-Fil) and polyacid-modified resin (Dyract AP) were created.