Dentistry Commons^™

Llusd Articulator - Volume 27, Number 2, Loma Linda University School Of Dentistry, Rodrigo Viecilli

Articulator (Dentistry)

Contents:

4 | Dean's message
6 | Communication Survey analyzed
14 | Terry Tanaka retires
17 | "I've lived on the mother side"
20 | LLUSD's 60th conferring of degrees
30 | Mechano-transduction of OOER
40 | Chen introduces China to Zirconia crowns
46 | Tom Rogers: surfer, humanitarian, lifelong learner
48 | NEWS
56 | A tent in the Kalahari

A 6-Year Evaluation Of 223 Tapered Dental Implants And Associated Prosthesis In 92 Patients At A University Hospital, Sana Ehsen Nagi, Farhan Raza Khan, Khan, Rabia Ali

Department of Surgery Docs

Abstract

The aim of the retrospective study was to assess the clinical and radiographic outcome of the dental implant surgery and prosthetics. It was conducted at the Aga Khan University Hospital, Karachi, and comprised of medical charts and radiographic records of patients visiting between 2010 and 2015. Variables such as implant dimensions, final prosthesis, method of retention, loading protocol and patient factors were analysed. A total of 223 implants (143(64.1%) in maxilla and 80(35.9%) in mandible) were placed in 92 subjects (50(54.3%) males and 42(45.7%) females). All implants were Zimmer tapered screw-vent. Length of 108(48.4%) implants was 11.5mm and diameter …

J Am Coll Dent 2016 83 4

Journal of the American College of Dentists

The Journal of the American College of Dentists (JACD) publishes scholarly articles, editorials, essays, and reflections addressing the ethical, professional, and social dimensions of dentistry. The Journal serves as a forum for advancing ethics, professionalism, leadership, and excellence within the dental community. By fostering dialogue across disciplines and perspectives, JACD provides readers with insights that encourage ethical, professional practice, lifelong learning, and service to the public, reinforcing dentistry’s commitment to advancing oral healthcare and the common good.

Color Change Of Commercial Resin Composited With Different Photoinitiators, Feng Gao

Master's Theses (2009 -)

Camphorquinone (CQ) is the most commonly used photoinitiator in light-cured dental resin composites. However CQ is associated with a yellowing effect, which has led manufacturers to add alternative initiators into resin composites to reduce the amount of CQ used. The color change upon polymerization by light and aging in artificial saliva and room air of 8 commercial traditional or bulk-fill resin composites with or without additional photoinitiator(s) beside CQ was studied. The three traditional resin composites with CQ and additional photoinitiator(s) tested were Tetric EvoCeram (Ivoclar Vivadent), AELITE LS Posterior (Bisco), and Vit-l-escence (Ultradent). The two bulk-fill resin composites with …

Association Between Hypodontia And Angles Malocclusion, Batool A. Haider, Syed Sheeraz Hussain

Department of Surgery Docs

Abstract

This study was planned to determine the prevalence of hypodontia in permanent dentition and to test whether an association was present between hypodontia and Angle's malocclusion. The retrospective study was conducted at a tertiary care hospital, Karachi, and comprised record of all patients visiting the orthodontic clinics of the hospital from 2005 to 2015. Orthodontic records of 790(79%) subjects, including 189(23.9%) males and 601(76.1%) females, were reviewed. Their mean age was 17 ± 5.06 years. A tooth was considered missing if no evidence of tooth germ was observed on orthopantomograms and dental casts. The total sample was distributed into …

Danger Signals, Inflammasomes, And The Intricate Intracellular Lives Of Chlamydiae, M. A. Pettengill, A. A. Sater, R. Coutinho-Silva, David M. Ojcius

All Dugoni School of Dentistry Faculty Articles

Chlamydiae are obligate intracellular bacterial pathogens, and as such are sensitive to alterations in the cellular physiology of their hosts. Chlamydial infections often cause pathologic consequences due to prolonged localized inflammation. Considerable advances have been made in the last few years regarding our understanding of how two key inflammation-associated signaling pathways influence the biology of

Age Estimation Of A Sample Of Pakistani Population Using Coronal Pulp Cavity Index In Molars And Premolars On Orthopantomogram, Sheikh Bilal Badar, Rabia Ghafoor, Farhan Raza Khan, Muhammad Hasan Hameed

Department of Surgery Docs

The aim of the present study was to assess the validity of tooth-coronal index (TCI) in the age estimation. This retrospective charts review was conducted at the Aga Khan University Hospital, Karachi from January 2016 to March 2016, and comprised 315 teeth of 80 individuals. The teeth were analysed on Orthopantomogram. TCI was calculated for unrestored mandibular premolars and molars. Pearson's correlation was applied to assess correlation between chronological age and TCI. Besides, 30(37.5%) subjects were male and 50(62.5%) female, and 140(44.4%) teeth were of male subjects and 175(55.6%) were of females. The mean correlation coefficient between chronological age and …

Prevalence Of Musculoskeletal Disorders Among Dentists In Teaching Hospitals In Karachi, Muhammad Hasan Hameed, Rabia Ghafoor, Farhan Raza Khan, Sheikh Bilal Badar

Department of Surgery Docs

Work-related musculoskeletal pain is common among healthcare professionals, including dentists. This crosssectional study was conducted to determine the prevalence of work-related musculoskeletal disorders (MSDs) among dentists. This study was carried out from January to April 2016 at various teaching hospitals of Karachi, and comprised 230 dentists. A self-administered questionnaire, adapted from a validated Nordic questionnaire, was distributed among the participants. Descriptive statistics were computed and associations of interest were analysed using chi-square test. Of the 230 forms, 182(79.11%) were included after leaving out the incomplete ones. The overall prevalence of MSDs was 138(75.8%). The most frequent reasonsfor MSDs were lack …

Comparison Of Fracture And Deformation In The Rotary Endodontic Instruments: Protaper Versus K-3 System, Sana Ehsen Nagi, Farhan Raza Khan, Munawar Rahman

Department of Surgery Docs

Abstract

This experimental study was done on extracted human teeth to compare the fracture and deformation of the two rotary endodontic files system namely K-3 and Protapers. It was conducted at the dental clinics of the Aga Khan University Hospital, Karachi, A log of file deformation or fracture during root canal preparation was kept. The location of fracture was noted along with the identity of the canal in which fracture took place. The fracture in the two rotary systems was compared. SPSS 20 was used for data analysis. Of the 172(80.4%) teeth possessing more than 15 degrees of curvature, fracture …

A Review Of The Failed Cases Of Dental Implants At A University Hospital In Karachi, Farhan Raza Khan, Rabia Ali, Sana Ehsen Nagi

Department of Surgery Docs

Abstract

The retrospective study was conducted to assess the dental implants that experienced failure. It was conducted at the dental clinic of the Aga Khan University Hospital, Karachi, and comprised record of dental implants from July 2010 to June 2015. Variables such as patient age, gender and systemic status, length and diameter of implants, bone grafting, type of definitive prosthesis (crown or bridge or overdenture), nature of retention (cement versus screw retained), loading strategy (immediate versus delayed loading), etc. were analysed. Of the 220 implants placed, 6(2.7%) failed to integrate (as revealed by torque test) at the beginning of prosthetic …

Effects Of Oral Contraceptives On The Prevalence Of Alveolar Osteitis After Mandibular Third Molar Surgery: A Retrospective Study, Luis Eduardo Almeida, Sean Pierce, K. Klar, K. Sherman

School of Dentistry Faculty Research and Publications

The objective of this study was to investigate the influence of oral contraceptives on the incidence rate of alveolar osteitis (AO) following the surgical extraction of both impacted mandibular third molars. This retrospective study reviewed the clinical records of patients who presented to the oral surgery clinic of a university school of dentistry for the extraction of impacted mandibular third molars. Using a database search, all patients were categorized by sex, age, occurrence of AO, and whether the females were taking oral contraceptives at the time of surgery. The patient was considered positive for AO if either one or both …

A Study Of Visible Tattoos In Entry-Level Dental Hygiene Education Programs, Kathryn R. Search

Dental Hygiene Theses & Dissertations

Purpose: The purpose of this study was to survey entry-level dental hygiene program directors in the United States to assess their perceptions of dental hygienists with visible tattoos as well as their satisfaction with current program tattoo polices. Methods: After IRB approval, a 14-item survey was administered online to 340 entry-level dental hygiene programs. Participants used a seven-point Likert type scale ranging from strongly disagree (1) to strongly agree (7), to indicate their opinions of visible tattoos on the basis of professionalism, concern within the school, dress code policy satisfaction, tolerance toward visible tattoos, whether tattoos needed to be covered, …

Dental Hygiene Alternative Practice Models: Preparedness And Confidence Of 2015 Graduates, Futun Nasser Alkhalifah

Dental Hygiene Theses & Dissertations

Purpose: evaluate dental hygiene graduates’ perceived preparedness and confidence to practice in alternative settings. Methods: a survey was sent through ADHA to all members who graduated within the last year (2015-2016) with a minimum of one-week work experience. The survey consisted of demographics, and two alternative practice scales. Independent variables characterized as follows: (1) graduate of a baccalaureate degree dental hygiene program within an allied health science program, (2) graduate of a baccalaureate degree dental hygiene program within a dental school, or (3) graduate of an associate degree dental hygiene program. The dependent variables were preparedness, confidence and practice management …

Application Of A Theory-Based Educational Intervention To Increase The Frequency Of Performing Oral Health Assessments On Children Among Advanced Practice Registered Nurses And Nurses, Denise Michelle Claiborne

Community & Environmental Health Theses & Dissertations

The purpose of this study was to determine if the use of a theory-based educational intervention would increase the frequency of performing oralhealth assessments (OHAs) during well-child visits among nurses. A randomized experimental design was conducted to determine if the educationalintervention would improve frequency of performing OHAs, in addition to, knowledge, confidence in performing OHAs, and advising parents. Using a non-probability sampling frame, “snowball technique,” a total of 46 participants were recruited. After exclusion criteria, 33 advanced practice registered nurses(APRNs), registered nurses (RNs), and licensed practical nurses (LPNs); were randomized into a control or experimental group. Data collection occurred over …

Positive Influence Of A Dental Anaesthesia Simulation Model On The Perception Of Learning By Mexican Dental Students, C. López-Cabrera, E. J. Hernández-Rivas, Takashi Komabayashi, E. L. Galindo-Reyes, D. Tallabs-López, Bernardino Isaac Cerda-Cristerna

Dental Medicine Faculty Publications

Introduction: This study evaluated the influence of 3-repetition training with a dental anesthesia simulation model (DASM) on the perception of learning by dental students. Materials and methods: Dental students who had never used a dental anesthesia technique were randomly divided into 2 groups that were taught the anterior superior alveolar nerve infiltrative anesthesia technique. Group 1 (G1, N=10) followed a 3-stage learning method: 1^st) theoretical lecture, 2^nd) clinical demonstration, and 3^rd) DASM training, including 3 repetitions of the anesthesia technique. Group 2 (G2, N=10) followed only the 1^st and 2^nd stages. The …

Ada News - 09/19/2016, American Dental Association, Publishing Division

ADA News

Established in 1970 as the official newspaper of the American Dental Association, the ADA News serves practicing dentists and others allied to the dental profession in the U.S. and internationally. It is the No. 1 source of news and information about the many benefits and services the ADA delivers to members daily as well as timely information on scientific, social, political and economic developments affecting dentistry and health care.

Ada News - 09/05/2016, American Dental Association, Publishing Division

ADA News

Established in 1970 as the official newspaper of the American Dental Association, the ADA News serves practicing dentists and others allied to the dental profession in the U.S. and internationally. It is the No. 1 source of news and information about the many benefits and services the ADA delivers to members daily as well as timely information on scientific, social, political and economic developments affecting dentistry and health care.

Ada Code Of Ethics (September 2016), American Dental Association

Code of Ethics

The ADA Code of Ethics has three main components: The Principles of Ethics, the Code of Professional Conduct and the Advisory Opinions. Contents may also include: Amendment to ADA Principles of Ethics and Code of Professional Conduct and Insert for the ADA Principles of Ethics and Code of Professional Conduct. The most current issue is available on the ADA’s website.

Treatment Considerations For Skeletal Class Iii Orthognathic Surgery, Janeta Chavanavesh, Kanok Soratesn

Chulalongkorn University Dental Journal

Class III malocclusion treatment is challenging to orthodontists because of its genetic basis and tendency for relapse following treatment. In adult patients, this malocclusion can be treated by either camouflage or combined orthodontic and surgical treatment. Since there are complexity in several aspects for Class III malocclusion, particularly in the case where the surgery is required, the aim of this review was to gather information concerning the etiologies, treatment strategies, and treatment considerations, especially for the orthognathic surgical treatment of skeletal Class III patients.

Effect Of Various Chemical Post Surface Treatments On The Microtensile Bond Strength Of Fiber Posts, Siriporn Arunpraditkul, Wacharasak Tumrasvin, Sariya Saoraya, Kamolporn Wattanasirmkit

Chulalongkorn University Dental Journal

Background/Objectives To evaluate the microtensile bond strength (μTBS) between epoxy-based or dimethacrylate-based fiber posts and resin cores after various post surface treatments. Materials and methods Eighty DT light (DT) and forty FRC Postec Plus (FRC) posts were divided into 8 groups; group 1: silanization (S), group 2: silanization and application of bonding agent (SB), groups 3, 5, 7: etching with 37% phosphoric acid for 1 minute (P), 30% hydrogen peroxide for 10 minutes (H30), 35% hydrogen peroxide for 1 minute (H35), respectively, followed by S, groups 4, 6, 8: etched as in groups 3, 5, and 7, but followed by …

Localized Juvenile Spongiotic Gingival Hyperplasia: A Case Report, Chanekrid Oupadissakoon, Narissaporn Chaiprakit, Weerachai Singhatanadgit

Chulalongkorn University Dental Journal

Localized juvenile spongiotic gingival hyperplasia (LJSGH) is a recently discovered oral lesion in children and young adults, which can be misdiagnosed with gingivitis associated with dental plaque and other well recognized reactive lesions. Clinically, JSGH presents as bright red gingival overgrowth with papillary surface, most commonly at attached and marginal gingivae of the upper anterior region. Differential diagnoses may include pyogenic granuloma, peripheral giant cell granuloma, peripheral ossifying fibroma and hyperplastic gingival inflammation. Histologically distinctive, JSGH is characterized by non-keratinizing stratified squamous epithelium with papillary architecture, intense neutrophilic exocytosis and spongiosis. The objectives of the present case report were to …

A Swing Arm Design Dental Surveyor, Vichet Chindavanig

Chulalongkorn University Dental Journal

The objective was to design and fabricate a dental surveyor using fewer complicated custom made industrial metal parts, thus minimizing production cost. The product design allows working with dental casts of varied dimensions. Current products were analyzed using machine design synthesis. The components of the new surveyor design are predominantly prefabricated objects. The formulation method is comparable with an inverse kinematic engineering approach. A swing arm dental surveyor design was found to be efficient for general dental use at a lower production cost. This article describes the design and assembling method of a dental surveyor made from local common products …

The Implementation Of Alternative Pain Control Methods By Dental Hygienists, Alejandra Valadez Rodriguez

Mahurin Honors College Capstone Experience/Thesis Projects

As a dental hygienist, it is important to understand new concepts and techniques that can contribute to a more comfortable setting for patients who experience dental anxiety. Alternative pain control methods can assist in alleviating patient anxiety, therefore, providing a more efficient and relaxed clinical atmosphere for both patient and clinician. Some of the methods discussed are: guided imagery, deep breathing, muscle relaxation, hypnosis, acupressure, essential oil diffusion, audio distraction, and visual stimuli. After reviewing the literature the researcher found that dental anxiety affects patient compliance, their overall health, and willingness to attend regular dental visits. The purpose of this …

Analyzing The Regionalized Awareness Of Distraction Osteogenesis, Ali Weinzapfel

Mahurin Honors College Capstone Experience/Thesis Projects

There are multiple treatment options available to initiate bone growth within the oral cavity. Distraction osteogenesis is a surgical dental procedure performed to initiate new bone growth in the maxillofacial region. This procedure is an important advancement to dental professionals because of the minimal complications and great outcome of bone growth it offers. As dentistry is always evolving, it is imperative to relay current trends to other professionals within the field of dentistry. The goal of this research was to analyze the regionalized awareness of distraction osteogenesis. A survey was conducted among dentists in Kentucky and Tennessee with multiple questions …

Edge Chipping Resistance And Flexural Strength Of Polymer Infiltrated Ceramic Network And Resin Nanoceramic Restorative Materials, Renos Argyrou, Geoffrey A. Thompson, Seok-Hwan Cho, David W. Berzins

School of Dentistry Faculty Research and Publications

Statement of problem

Two novel restorative materials, a polymer infiltrated ceramic network (PICN) and a resin nanoceramic (RNC), for computer-assisted design and computer-assisted manufacturing (CAD-CAM) applications have recently become commercially available. Little independent evidence regarding their mechanical properties exists to facilitate material selection.

Purpose

The purpose of this in vitro study was to measure the edge chipping resistance and flexural strength of the PICN and RNC materials and compare them with 2 commonly used feldspathic ceramic (FC) and leucite reinforced glass-ceramic (LRGC) CAD-CAM materials that share the same clinical indications.

Material and methods

PICN, RNC, FC, and LRGC material specimens …

Comparison Of Two Methods Of Transpalatal Arch And Lingual Arch Activation, Taoran Zhang

Loma Linda University Electronic Theses, Dissertations & Projects

The TPA and LA can be activated with two methods: the “shape-driven method” where the appliance is made to match the final tooth position and the “force-driven method” where the appliance is made to make sure the force system delivered by it at the beginning is consistent with the planned tooth movement. This study compared the two methods in vitro quantitatively with typodont teeth and multi-axis force torque transducers in all three dimensions. Results: In the TPA first order activation, with comparable Fy (force on Y axis) reading, the shape-driven activation group had a significantly higher Mx (moment on X …

A Cbct Study Of Pharyngeal Airway Changes Due To Fixed Functional Appliances, Scott T. Peterson

Loma Linda University Electronic Theses, Dissertations & Projects

Introduction: The purpose of this retrospective study, using head and neck Cone-Beam Computed Tomography (CBCT) images, was to measure and compare volumetric, area, and linear changes of the pharyngeal airway space in patients treated with a MARA or Herbst Class II correction appliances. Materials and Methods: Twenty-six patients treated with a MARA (mean age 13.2), nine with a Herbst (mean age 12.12) , and a control group twenty-five orthodontically treated class I patients (mean age 13.11). T1 and T2 CBCT images were measured and compared between the three groups for area, length, and width measurements along the velo-, oro-, and …

An Evaluation Of Root Length Change Measurements Using Intraoral Scan And Panoramic Radiographs, Elijah C. Wang

Loma Linda University Electronic Theses, Dissertations & Projects

Introduction: This study was intended to evaluate the accuracy of using panoramic radiographs to measure root length change over the course of orthodontic treatment, using intraoral scans of crowns, and a mathematical model to account for distortions in the radiographs. The study additionally evaluated whether a best-fit equation could be created from the calculated data to minimize differences to the measurements of root resorption made on CBCT scans. Materials and Methods: Twenty-one patients were selected who had comprehensive orthodontic treatment, and all teeth in the upper right quadrant were evaluated in this study. T1 and T2 CBCT images were compared …

Correlation Of Tooth Length Measurements Made On Cbct And 3t Mr Images, Andrew Scott Taylor

Loma Linda University Electronic Theses, Dissertations & Projects

Objective. This study compared tooth length measurements made on cone beam computed tomography (CBCT) scans and 3-Tesla (3T) magnetic resonance (MR) scans performed with and without an alginate bite registration surrounding the crowns of the teeth. Materials and Methods. One CBCT scan, one MR scan with alginate bite registration, and one MR scan without bite registration were performed on 12 subjects. The alginate bite registration was used to provide a proton-rich material to surround proton-poor teeth in an attempt to improve visualization of teeth. DICOM formatted images from each of the three scans for each subject were oriented in all …

The Effect Of Orthodontic Treatment On Sagittal Root Position Of The Maxillary Central Incisor, Jeremy Haines

Loma Linda University Electronic Theses, Dissertations & Projects

Introduction: Sagittal root position (SRP) of maxillary incisors is an important factor in implant treatment planning. Kan et al defined four classes of SRP in an effort to aid implant placement treatment planning and these SRP classifications represent a novel approach to describing bone changes around the maxillary incisors. The effect of orthodontic tooth movement, specifically changes in inclination, on SRP is of interest in potentially facilitating immediate implant placement. Purpose: The purpose of this study was to use Cone Beam Computed Tomography (CBCT) to evaluate the adaptation of alveolar bone around the maxillary incisors as a result of orthodontic …