Performance of two different digital evaluation systems used for assessing pre-clinical dental students' prosthodontic technical skills.

Introduction: Proper integration of newly emerging digital assessment tools is a central issue in dental education in an effort to provide more accurate and objective feedback to students. The study examined how the outcomes of students' tooth preparation were correlated when evaluated using traditional faculty assessment and two types of digital assessment approaches. Specifically, incorporation of the Romexis Compare 2.

Impact of Digital Tooth Preparation Evaluation Technology on Preclinical Dental Students' Technical and Self-Evaluation Skills.

The aim of this study was to evaluate the effect of digital tooth preparation imaging and evaluation technology on dental students' technical abilities, self-evaluation skills, and the assessment of their simulated clinical work. A total of 80 second-year students at one U.S.

Effect of Computer-Assisted Learning on Students' Dental Anatomy Waxing Performance.

The aim of this study was to evaluate the impact of computer-assisted learning on first-year dental students' waxing abilities and self-evaluation skills. Additionally, this study sought to determine how well digital evaluation software performed compared to faculty grading with respect to students' technical scores on a practical competency examination. First-year students at one U.

Internal fit of pressed and computer-aided design/computer-aided manufacturing ceramic crowns made from digital and conventional impressions.

Statement Of Problem: No studies have evaluated the internal adaptation of pressed and milled ceramic crowns made from digital impressions.

Purpose: The purpose of this in vitro study was to evaluate the internal fit of pressed and milled ceramic crowns made from digital and conventional impressions.

Material And Methods: Thirty polyvinyl siloxane (PVS) impressions and 30 Lava COS impressions made of a prepared dentoform tooth (master die) were fabricated.

Dental anatomy grading: comparison between conventional visual and a novel digital assessment technique.

Conventional grading of dental students' projects in preclinical courses has mainly relied on visual evaluation by experienced instructors. The purpose of this study was to compare conventional visual grading in a dental anatomy course at one U.S.

3D and 2D marginal fit of pressed and CAD/CAM lithium disilicate crowns made from digital and conventional impressions.

Purpose: This in vitro study evaluated the 3D and 2D marginal fit of pressed and computer-aided-designed/computer-aided-manufactured (CAD/CAM) all-ceramic crowns made from digital and conventional impressions.

Materials And Methods: A dentoform tooth (#30) was prepared for an all-ceramic crown (master die). Thirty type IV definitive casts were made from 30 polyvinyl siloxane (PVS) impressions.

Fracture toughness of yttria-stabilized zirconia sintered in conventional and microwave ovens.

Statement Of Problem: The fabrication of zirconium dioxide (ZrO2) dental prosthetic substructures requires an extended sintering process (8 to 10 hours) in a conventional oven. Microwave sintering is a shorter process (2 hours) than conventional sintering.

Purpose: The purpose of this study was to compare the fracture toughness of 3 mol % Y2O3-stabilized ZrO2 sintered in a conventional or microwave oven.

DNA barcoding of the ichthyofauna of Taal Lake, Philippines.

This study represents the first molecular survey of the ichthyofauna of Taal Lake and the first DNA barcoding attempt in Philippine fishes. Taal Lake, the third largest lake in the Philippines, is considered a very important fisheries resource and is home to the world's only freshwater sardine, Sardinella tawilis. However, overexploitation and introduction of exotic fishes have caused a massive decline in the diversity of native species as well as in overall productivity of the lake.

A model for overview of student learning: a matrix of educational outcomes versus methodologies.

A concise overview of an institution's aspirations for its students becomes increasingly elusive because dental education has evolving emphases on priorities like critical thinking and adapting to new technology. The purpose of this article is to offer a learner-oriented matrix that gives a focus for discussion and an overview of an institution's educational outcomes. On one axis of the matrix, common educational outcomes are listed: knowledge, technical skills, critical thinking, ethical and professional values, patient and practice management, and social responsibility awareness.

Human perception of dental porcelain translucency correlated to spectrophotometric measurements.

Purpose: This study evaluated the relationship between instrumental measurements and subjective visual assessment of differences in dental porcelain translucency.

Materials And Methods: Unshaded feldspathic porcelain was used with controlled amounts of tin oxide to create two groups of 12-mm diameter disks with incremental changes in opacity. Contrast ratio (CR = Yb/Yw) was determined with a spectrophotometer, and used as a measure of porcelain translucency (Group A = 0.

A national study on the development of visual attention using the cognitive assessment system.

Objective: Developmental changes in the performance of children and adolescents are studied using the Cognitive Assessment System (CAS) which is an individually administered test of 4 basic cognitive processes.

Method: The test measures the Planning, Attention, Simultaneous, and Successive (PASS) processes as a theory of intelligence that can provide the framework for an alternative to traditional IQ tests. The CAS, which includes a scale of attention comprising 3 subtests, each of which is presented visually, provides an opportunity to study the development of visual attention for 2,200 children and adolescents aged 5- to 17-years-old who participated in the national standardization sample.

Development of the curve of Spee.

Introduction: Ferdinand Graf von Spee is credited with characterizing human occlusal curvature viewed in the sagittal plane. This naturally occurring phenomenon has clinical importance in orthodontics and restorative dentistry, yet we have little understanding of when, how, or why it develops. The purpose of this study was to expand our understanding by examining the development of the curve of Spee longitudinally in a sample of untreated subjects with normal occlusion from the deciduous dentition to adulthood.

In vitro fracture resistance of endodontically treated central incisors with varying ferrule heights and configurations.

Statement Of Problem: The in vitro effectiveness of a uniform circumferential ferrule has been established in the literature; however, the effect of a nonuniform circumferential ferrule height on fracture resistance is unknown.

Purpose: This in vitro study investigated the resistance to static loading of endodontically treated teeth with uniform and nonuniform ferrule configurations.

Material And Methods: Fifty extracted intact maxillary human central incisors were randomly assigned to 1 of 5 groups: CRN, no root canal treatment (RCT), restored with a crown; RCT/CRN, no dowel/core, restored with a crown; 2 FRL, 2-mm ferrule, cast dowel/core and crown; 0.

Interim restorations.

Interim restorations are a critical component of fixed prosthodontic treatment, biologically and biomechanically. Interim restoration serves an important diagnostic role as a functional and esthetic try-in and as a blueprint for the design of the definitive prosthesis. When selecting materials for any interim restoration, clinicians must consider physical properties, handling properties, patient acceptance, and material cost.

Relative translucency of six all-ceramic systems. Part II: core and veneer materials.

Unlabelled: STATEMENT OF PROBLEM All-ceramic core materials with various strengthening compositions have a range of translucencies. It is unknown whether translucency differs when all-ceramic materials are fabricated similarly to the clinical restoration with a veneered core material.

Purpose: This study compared the translucency of 6 all-ceramic materials veneered and glazed at clinically appropriate thicknesses.

Relative translucency of six all-ceramic systems. Part I: core materials.

Statement Of Problem: All-ceramic restorations have been advocated for superior esthetics. Various materials have been used to improve ceramic core strength, but it is unclear whether they affect the opacity of all-ceramic systems.

Purpose: This study compared the translucency of 6 all-ceramic system core materials at clinically appropriate thicknesses.

Relationship between crown placement and the survival of endodontically treated teeth.

Statement Of Problem: Crowns have been considered the restoration of choice for endodontically treated teeth, but their selection has been based primarily on anecdotal evidence.

Purpose: This study tested the hypothesis that crown placement (coronal coverage) is associated with improved survival of endodontically treated teeth when preaccess, endodontic, and restorative factors are controlled.

Material And Methods: A University of Iowa College of Dentistry treatment database was used to identify permanent teeth that had undergone initial obturation between July 1, 1985, and December 31, 1987.

Effect of polyaramid fiber reinforcement on the strength of 3 denture base polymethyl methacrylate resins.

Purpose: The interactive effects of synthetic polyaramid reinforcement fibers on the transverse strength of intact and repaired heat-polymerized denture base acrylic resins were investigated.

Materials And Methods: Three polymethylmethacrylate (PMMA) polymers were tested: Acron MC (GC International Corp, Scottsdale, AZ), Lucitone 199 (Dentsply International Inc, York, PA), and Microlon (The Hygienic Corp, Akron, OH). With each polymer, there were 2 controls and 4 experimental groups (n = 9 per group).

Ten-year survival rates of teeth adjacent to treated and untreated posterior bounded edentulous spaces.

Statement Of Problem: Failure to replace a single missing posterior tooth may lead to a variety of dental problems, which may ultimately result in tooth loss. However, little is known about the fate of the adjacent teeth if a missing posterior tooth is not replaced.

Purpose: This retrospective study evaluated the survival of teeth adjacent to treated and untreated posterior bounded edentulous spaces.

Tooth preparations for complete crowns: an art form based on scientific principles.

Statement Of The Problem: No recent literature has reviewed the current scientific knowledge on complete coverage tooth preparations.

Purpose: This article traces the historic evolution of complete coverage tooth preparations and identifies guidelines for scientific tooth preparations.

Material And Methods: Literature covering 250 years of clinical practice was reviewed with emphasis on scientific data acquired during the last 50 years.

Micromotion and dynamic fatigue properties of the dental implant-abutment interface.

Statement Of Problem: Clinical loading may result in micromotion and metal fatigue in apparently stable implant screw joints. This micromotion may contribute to tissue inflammation and prosthesis failure.

Purpose: This study investigated dental implant screw joint micromotion and dynamic fatigue as a function of varied preload torque applied to abutment screws when tested under simulated clinical loading.

Splinted all-ceramic laboratory technique for implant restorations.

The fabrication of esthetically pleasing implant restorations remains a common and frustrating challenge for dental technicians as well as clinicians. Poor implant placement and post surgical gingival response often creates a difficult foundation on which to build a successful restoration. Castable, cast-to and prepable abutments are employed to correct these problems as they allow some measure of control of angulation and depth of the clinical restoration.

Strategies to achieve fit in implant prosthodontics: a review of the literature.

Purpose: This paper reviews the literature on advanced strategies that attempt to improve fit in implant prosthodontics with reference to the concept of the "distortion equation."

Materials And Methods: The majority of the articles reviewed were either clinical or technique articles that advocated strategies to improve fit in implant prosthodontics. A limited number of retrospective and prospective clinical trial studies were included as they related to the topic.