Dentistry Commons^™

Ada News Convention Daily - 2012 Day 4, American Dental Association, Publishing Division

ADA News

The ADA News Daily (also called the ADA News Convention Daily) is a special edition of the ADA News published each day during American Dental Association Annual Sessions.

Fabrication And Characterization Of Porcine Collagen/Hydroxyapatite Scaffold, Sukuntha Phuaknapho, Chantavat Sutthiboonyapan, Somporn Swasdison

Chulalongkorn University Dental Journal

Objective To fabricate and characterize collagen scaffolds from porcine skin collagen mixed with hydroxyapatite for using as scaffolds in guided bone regeneration. Materials and methods The collagen used in this study was extracted from porcine skin by dissolving in acid-enzyme mixture and salt precipitation. Three different concentrations (1.5% 2% and 2.5% by weight) of the extracted collagen solutions were mixed with hydroxyapatite at the ratio of hydroxyapatite : collagen = 1:10 (weight/volume). The collagen-hydroxyapatite mixtures were fabricated to sponge-like scaffolds by 24-hour freeze drying method under 2 conditions, slow freezing and fast freezing. The fabricated scaffolds were then cross-linked to …

Prevalence And Factors Associated With Symptoms Of Temporomandibular Disorders In A Group Of Thai Scuba Divers, Phanomporn Vanichanon, Thanomsri Anantvoranich, Teeranuch Sanharati, Sirinart Manaspaibool

Chulalongkorn University Dental Journal

Objective To investigate the prevalence of symptoms of temporomandibular disorders (TMD) in a group of Thai scuba divers and to identify factors associated with TMD symptoms after diving. Materials and methods A group of 280 Thai scuba divers collected by purposive sampling were asked to complete a questionnaire on symptoms of TMD in daily life, during, and after diving including questions regarding various factors which may relate to TMD. The data were analyzed using descriptive and multivariate logistic regression statistics. Results The prevalence of TMD (at least 2 symptoms) after diving was 22.9%. Jaw stiffness was the most prevalent symptoms …

Factors Related To Turnover Intention Among Thai Dentists, Chanchai Hosanguan

Chulalongkorn University Dental Journal

Objective The purpose of this study was to investigate factors associated with turnover intention of Thai dentists. Materials and methods A mailed survey was conducted on a systematic random sample of 2,723 Thai dentists, 733 of which returned completed questionnaires. Turnover intention was assessed by dentistsû intenion to change job or have a career break within 5 years. Demographic, economic, practice characteristic and psychosocial work environment factors were used to build three logistic models for the public and private sectors, as well as for the overall sample. Results Overall, 41.5% of dentists reported turnover intention-55.6% for public dentists and 21.5% …

Tooth Deformation In Extracted Molars In Response To Thermal Stimuli, Pairoj Linsuwanont, Joseph Palamara, Harold Messer

Chulalongkorn University Dental Journal

Objective This study investigated patterns of tooth deformation in response to immersion in hot and cold water, and attempted to correlate the measured dimensional change with calculated values based on coefficients of thermal expansion. Materials and methods The extent of cuspal deformation and strains within dentine were assessed in extracted human molars, in response to immersion in hot and cold water. Cuspal displacement was measured using an extensometer attached to the buccal and lingual cusps, and strains on the pulpal dentine surface were measured using strain gauges attached to the occlusal pulpal surface. Temperature change was monitored with thermocouples. Tooth …

Treatment Of Moderate Dental Fluorosis Using Porcelain Laminate Veneers: A Case Report, Ketmanee Kruetongsri, Chalermpol Leevailoj

Chulalongkorn University Dental Journal

Objective The purpose of this article was to demonstrate the preliminary report of bonding ability of porcelain laminate veneers to fluorosed teeth after 1 year. Materials and methods The clinical findings on this patient were dental fluorosis of Thylstrup- Fejerskov Index (TFI) = 5-7. The treatment plan was to place 16 PLVs. Study models showed that the teeth were in good proportion. Wax-up models were used for silicone index. The incisal edge reductions were a feather incisal edge in maxillary teeth and an incisal bevel preparation in mandibular teeth. The laminate veneers were fabricated using the IPS Empress Esthetic system …

Comparative Study Of Ot Equator Profile Attachment Versus Gps Attachment In Implant Retained Mandibular Overdenture Cases, Fardos N. Rizk

Dentistry

Aim: This study was carried out to evaluate whether OT Equator Profi le attachment or GPS attachment is less destructive to crestal bone around implants and to bone in distal aspect of the ridge in implant retained mandibular overdenture cases. Materials and Methods: Following two stage surgical protocol twelve completely edentulous patients received two implants placed bilaterally in the canine region (24 implants) to retain mandibular overdentures. Four months following the surgery patients were randomly divided into two equal groups; Group-I received OT Equator Profi le attachment while Group-II received GPS attachment upon which mandibular overdentures were retained. Once patients …

Oil Pulling: An Ancient Practice For A Modern Time, Gina M. Bekeleski, Gayle Mccombs, W. Lee Melvin

Dental Hygiene Faculty Publications

The practice of oil pulling or oil swishing is a time-honored Indian folk remedy that involves swishing edible oil in the mouth for oral and systemic health benefits. Oil pulling offers a naturalistic approach to oral health care for a growing body of individuals who desire alternative and complementary medicine. The purpose of this paper was to summarize published research on the effectiveness of oil pulling on oral health. Literature was retrieved from 1992-2011 through databases including Cumulative Index to Nursing and Allied Health Literature (CINAHL), Education Resources Information Center (ERIC), Medical Literature Analysis and Retrieval System Online (MEDLINE), and …

Vital Tooth Whitening Effects On Oral Health-Related Quality Of Life In Older Adults, Ann M. Bruhn, Michele L. Darby, Gayle B. Mccombs, Carleen M. Lynch

Dental Hygiene Faculty Publications

Purpose: The purpose of this study was to determine if vital tooth whitening affects oral health-related quality of life (OHRQOL) in adults age 50 years and older, and if tooth whitening causes increased participation in social activities.

Methods: Using a 2 group, single blind, randomized, pre-test, multiple post-test design, 62 participants were enrolled. The experimental group used a whitening product twice daily for 3 weeks. The control group used no whitening products. The Oral Health Impact Profile (OHIP) served as the pre- and post-test measure. The OHIP measures OHRQOL on 7 subscales: functional factors, psychological disabilities, psychological discomforts, physical disabilities, …

Magnification Loupes In U.S. Entry-Level Dental Hygiene Programs - Occupational Health And Safety, Leslie Mchaney Congdon, Susan Lynn Tolle, Michele Darby

Dental Hygiene Faculty Publications

Purpose: The purpose of this study was to determine policies and practices regarding magnification loupes among faculty and students in accredited dental hygiene programs as measured by a 31 item, self-designed questionnaire. In addition, the study compared policies among dental hygiene programs in 2 year versus 4 year programs in terms of requirements for the use of magnification loupes.

Methods: After institutional review board approval, a 31 item self-designed questionnaire was emailed via Survey Monkey to 303 entry-level dental hygiene programs. An overall response rate of 75% was obtained. Data were analyzed using descriptive statistics and chi-square test of independence. …

Evidence Supporting Platform-Switching To Preserve Marginal Bone Levels Not Definitive, Gary L. Stafford

School of Dentistry Faculty Research and Publications

Data sources

MEDLINE, EMBASE, The Cochrane Oral Health Group's Trials Register, The Cochrane Central Register of Controlled Trials (CENTRAL), UK National Research Register, Australian New Zealand Clinical Trials Registry (ANZCTR), Database of Abstracts of Reviews of Effectiveness (DARE), ISI Proceedings for relevant conference abstracts. The search strategy used keywords but not subject heading terms. A number of relevant journals were hand searched (seven most recent years) and authors were contacted in the absence of complete data.

Study selection

Randomised controlled trials (RCT) or controlled clinical trials (CCT) reported in English only, that compared platform-switched to platform-matched implants were eligible. A …

A Snapshot Of Dental Adhesives, Gary L. Stafford

School of Dentistry Faculty Research and Publications

No abstract provided.

Rural–Urban Differences In Dental Service Use Among Children Enrolled In A Private Dental Insurance Plan In Wisconsin: Analysis Of Administrative Data, Pradeep Bhagavatula, Qun Xiang, Aniko Szabo, Fredrick Eichmiller, Raymond A. Kuthy, Christopher Okunseri

School of Dentistry Faculty Research and Publications

Background

Studies on rural–urban differences in dental care have primarily focused on differences in utilization rates and preventive dental services. Little is known about rural–urban differences in the use of wider range of dental procedures. This study examined patterns of preventive, restorative, endodontic, and extraction procedures provided to children enrolled in Delta Dental of Wisconsin (DDWI).

Methods

We analyzed DDWI enrollment and claims data for children aged 0-18 years from 2002 to 2008. We modified and used a rural and urban classification based on ZIP codes developed by the Wisconsin Area Health Education Center (AHEC). We categorized the ZIP codes …

Influence Of Surface Treatment Of Y-Tzp And Luting Cements On Retention Of Y-Tzp Crown, Mehdi Karimipour-Saryazdi

All ETDs from UAB

Clinicians for a single tooth restoration, due to improved esthetics, often select all ceramic crowns. Zirconium Oxide has been utilized for many years to full fill the requirement of esthetics, high mechanical properties and biocompatibility. The purpose of this study is to evaluate the effect of different surface treatments and luting agents on retention of a zirconium oxide crown. Material and Methods: Ninety extracted teeth were obtained. Teeth were mounted in Ortho JetTM resin (Lang Dental Manufacturing Co., Inc. IL, USA). Occlusal surface was cut flat using Isomet (Buhler Ltd). Diamond burs were used to cut axial walls under water …

Histomorphometry And Quantitative Analysis Of Longer-Term Implant Interfaces, Dave Darko Kojic

All ETDs from UAB

Objective: This investigation was to evaluate (>10 year) bone response around custom (HA plasma coated) dental implants and HA particulate. Materials and Methods: Three individual post mortem mandibular COI Implants with surrounding bone were processed at six transverse locations to obtain non-decalcified ground sections (20-80µm)(n=36) and stained initially with methylene blue/basic fuchsin. Slides were evaluated to select (n= 8) slides for regions of interest along the perimeter of the implant, using optical microscopy (Olympus BX51 microscope) with a Retiga EXi color digital camera (Olympus, Center Valley, PA) and Bioquant VR software (R&M Biometrics, Nashville, TN) at an original magnification …

The Influence Of Growth Factors Applied During Socket Conversion, On The Incidence Of Spontaneous Early Dental Implant Exposure, Michael Anh Minh Nguyen

All ETDs from UAB

Spontaneous early exposure of a dental implant's cover screw can result in a nidus for plaque accumulation, which may result in inflammation, damage to the peri-implant mucosa, and possible peri-implant bone loss. This study aims to investigate the effect of the addition of growth factors, specifically recombinant human platelet-derived growth factor, and platelet-rich plasma, at the time of socket conversion, on the incidence of early implant exposures. This retrospective study utilized data from a study involving a total of 80 implants that were placed in 4 different types of sites (Groups 1,2,3, and 4). Group 1 sites were extraction sites …

Molar Distalization To Resolve Class Ii Malocclusion: A Cephalometric Study Utilizing The Carriere Distalizer, Careybeth Hayes Rivers

All ETDs from UAB

Objective: The purpose of this study is to determine the short-term skeletal and dental effects that occur as a result of Class II malocclusion correction utilizing the Carrière Distalizer as compared to best-matched controls. Methods: This is a retrospective cohort cephalometric study using lateral cephalometric films of 25 (14 male, 11 female, average age 13y 6m) class II patients consecutively treated with the Carrière Distalizer compared with 36 (19 male, 17 female, 13y 2m) untreated class II control subjects from a historical database best-matched based upon age, sex and skeletal classifications. Pretreatment and posttreatment lateral head films were analyzed with …

Characterization Of Pleiotrophin And Receptor Protein Tyrosine Phosphatase Beta/Zeta In Odontoblast And Osteoblast Cell Lines, Amena Tamkenath

All ETDs from UAB

Pleiotrophin (PTN) is an extracellular matrix-associated growth factor and chemokine expressed in mesodermal and ectodermal cells. It plays an important role in osteoblast recruitment and differentiation. PTN has two well-known physiological receptors, protein tyrosine phosphatase beta/zeta (RPTPRZ1), and N-syndecan. Protein tyrosine phosphatases are a group of enzymes that remove phosphate groups from phosphorylated tyrosine residues on proteins. Protein tyrosine phosphorylation is a common post-translation modification that can create novel recognition motifs for protein interactions and cellular localization, affect protein stability and regulate enzyme activity. Osteoblasts have recently been found to express the short transmembrane isoform of RPTP beta/zeta but nothing …

Effect Of Different Percentages Of Silica Nanofibers Filler Loads On Mechanical And Physical Properties Of Flowable And Hybrid Composite Resins, Qinyue Cai

All ETDs from UAB

Dental composites are used for a variety of applications in dentistry today. Dental composites are composed of a resin matrix containing a blend of Bis-GMA (bis-phenol A-glycidyldimethacrylate) or urethane dimethacrylate (UDMA) along with TEGDMA (tetraethylglycidylmethacrylate). Exhaustive researches has been conducted in recent years to improve physical and mechanical properties of resin-based dental composites, since the existing resin-filler systems may not be suitable for long term applications in large as well as high stress restorations. Nanofillers reinforced composite resins have shown promising results. Silica-based nanoparticles and clusters are blended with larger-sized fillers and are available commercially for restoring large posterior restorations. …

A Histologic And Radiologic Analysis Of Bone Formation Under The Elevated Maxillary Sinus Using Venous Coagulum As The Sole Filling Material, Kathleen Ann Beaudry

All ETDs from UAB

Insufficient bone height is a common obstacle to placing dental implants in the posterior maxilla. Sinus lift procedures using various grafting materials have been shown to be a highly predictable way to increase bone height in the posterior maxilla (Jensen 1998). Given the wide range of materials that have proven successful in augmenting the sinus, the argument could be made that the presence of graft is not critical. Instead, the creation and maintenance of space, provided by two implants, along with the osteoinductive properties of the membrane, the periosteum, and growth factors provided by a blood clot are the only …