Dentistry Commons^™

Dextran Hydrogels Incorporated With Bioactive Glass-Ceramic: Nanocomposite Scaffolds For Bone Tissue Engineering, Parisa Nikpour, Hamed Salimi-Kenari, Farahnaz Fahimipour, Sayed Mahmood Rabiee, Mohammad Imani, Erfan Dashtimoghadam, Lobat Tayebi

School of Dentistry Faculty Research and Publications

A series of nanocomposite scaffolds comprised of dextran (Dex) and sol–gel derived bioactive glass ceramic nanoparticles (nBGC: 0–16 (wt%)) were fabricated as bioactive scaffolds for bone tissue engineering. Scanning electron microscopy showed Dex/nBGC scaffolds were consisting of a porous 3D microstructure with an average pore size of 240 μm. Energy-dispersive x-ray spectroscopy illustrated nBGC nanoparticles were homogenously distributed within the Dex matrix at low nBGC content (2 wt%), while agglomeration was observed at higher nBGC contents. It was found that the osmotic pressure and nBGC agglomeration at higher nBGC contents leads to increased water uptake, then reduction of the compressive …

Lipoxin A4 Attenuates The Inflammatory Response In Stem Cells Of The Apical Papilla Via Alx/Fpr2, A. Gaudin, Miroslav Tolar, Ove A. Peters

All Dugoni School of Dentistry Faculty Articles

Similar to the onset phase of inflammation, its resolution is a process that unfolds in a manner that is coordinated and regulated by a panel of mediators. Lipoxin A4 (LXA₄) has been implicated as an anti-inflammatory, pro-resolving mediator. We hypothesized that LXA₄ attenuates or prevents an inflammatory response via the immunosuppressive activity of Stem Cells of the Apical Papilla (SCAP). Here, we report for the first time in vitro that in a SCAP population, lipoxin receptor ALX/FPR2 was constitutively expressed and upregulated after stimulation with lipopolysaccharide and/or TNF-α. Moreover, LXA₄ significantly enhanced proliferation, migration, and wound …

Ada News - 06/04/2018, 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.

Treatment Of Obstructive Sleep Apnea With Maxillo-Mandibular Advancement Surgery: Evaluation And Predictors Of Success, Daniel Taub, Dmd, Md, Michael Courtney, Dmd, Md, Karl Doghramji, Md

Department of Oral and Maxillofacial Surgery Posters

Obstructive sleep apnea (OSA) is a well-recognized disease entity affecting approximately 2% to 4% of the population. Maxillomandibular advancement (MMA) surgery is a highly successful surgical alternative to poorly tolerated CPAP therapy and achieves a success rate of 89% in the current literature. Our present study evaluates the effectiveness of MMA surgery in the treatment of patients with moderate to severe OSA based on Shers criteria of 50% reduction in AHI and AHI < 20. Radiographic and clinical treatment variables were evaluated in determining predictors of success for MMA in individuals with OSA.

Oral Health Promotion Practices: A Survey Of Florida Child Care Center Directors., Vinodh Bhoopathi, Ajay Joshi, Romer Ocanto, Robin J. Jacobs

HPD Articles

BACKGROUND: To understand the oral health promotion practices (OHPPs) in Florida licensed childcare centers (CCCs), we surveyed the childcare center directors (CCCDs) employed at these centers. We determined if CCC's affiliation with Early Head Start/Head Start (EHS/HS) programs was associated with the number of OHPPs implemented.

METHODS: For this cross-sectional study we emailed a pretested 45-item online survey to unduplicated email addresses of 5142 licensed CCCDs as listed in the publicly available Florida Department of Child and Family services database. Univariate and bivariate analyses were conducted. In addition, a Poisson regression model predicting higher numbers of OHPPs implemented was conducted. …

Commencement Program 2018, Loma Linda University

Commencement Programs

CONTENTS

1 | Message from the President

3 | 2018 Events of Commencement

5 | The Academic Procession

7 | Significance of Academic Regalia

9 | The Good Samaritan

10 | University History Highlights

12 | Loma Linda University Song - "Healing Love"

13 | Criteria for Institutional Awards—Loma Linda University and Loma Linda University Health

15 | Loma Linda University Health and Loma Linda University Honorees

32 | The Programs, The School Honorees, and The Speakers

• School of Medicine, 33
• School of Pharmacy, 63
• School of Dentistry, 76
• School of Allied Health Professions - Allied Health Studies, Cardiopulmonary Sciences, …

Concepts, Protocol, Variations And Current Trends In Surgery First Orthognathic Approach: A Literature Review, Hafiz Taha Mahmood, Maheen Ahmed, Mubassar Fida, Adeel Tahir Kamal, Farheen Fatima

Section of Dental-Oral Maxillofacial Surgery

In the current era of expedited orthodontics, among many clinicians, tertiary care hospitals and patients, surgery first orthognathic approach (SFOA) has gained popularity. The advantages of SFOA (face first approach) are the reduced overall treatment duration and the early improvement in facial esthetics. In SFOA, the absence of a presurgical phase allows surgery to be performed first, followed by comprehensive orthodontic treatment to achieve the desired occlusion. The basic concepts of surgery early, surgery last, SFOA and Sendai SFOA technique along with its variations are reviewed in the present article. The recent advancement in SFOA in the context of preoperative …

A Digitized Comparison Using Cone Beam Computed Tomography And Intraoral Scanning, Yvette Carrillo

Loma Linda University Electronic Theses, Dissertations & Projects

Purpose: The purpose of this study was to evaluate the accuracy of digital workflow by evaluating the absolute technical differences in various scanning methods on jaw models with scanning bodies.

Material and Methods: Twenty identical 3-dimensionally printed mandibular quadrant jaw models with a single implant and scanning body replacing a missing tooth in area #19 were examined. Cone beam computed tomography .STL files were used as the first test group. Intraoral scans were used as the second test group. Desktop scans of each model and the .STL file was used as a control. The .STL files were then …

Managing Patient Expectations With Implant Treatment, Daniel B. Kamran, Mark Booth Dds, Eduardo Gonzalez Dds, Ed Shaw Dds

Excellence Day

This patient came to University of the Pacific, Arthur A. Dugoni School of Dentistry to get implants and implant crowns to improve his smile, replacing his upper partial denture. Different approaches were made by the faculty to arrive at best outcomes, which took four years for the patient to receive the treatment he wanted. This abstract will further detail how the treatment was conducted and the results afterwards.

Rapid Placement And Anatomical Sculpting Of Hardened Posterior Composite, Patrick Roetzer, Mahek Pipalia, Krunali Kapadia

Excellence Day

Posterior composites have long had a reputation for being difficult and time consuming in clinical practice. In addition to this reputation, it has been noted that recurrent caries and in general failure of these restorations prematurely has been a problem. Relative to amalgams, posterior composites have vexed even good clinical dentist. This video presentation illustrates techniques that not only save time but also create more predictable high-quality restorations.

A Modified “Wound Healing” And Hypoxia Model In Vitro, Schuyler G. Tang, Isabel Kwon, Marie M. Tolarova, Mirek Tolar

Excellence Day

Closing a wound may resemble some aspects of fusion of embryonic processes during development of face. In addition, both are sensitive to oxygen supply.

Effect Of Folate On Endoplasmic Reticulum Stress Caused By Hypoxia, Paul Kim, Shub Dhillon, Mahsa Mortazavi, Marie M. Tolarova, Mirek Tolar

Excellence Day

Endoplasmic reticulum (ER) stress is involved in the pathogenesis of congenital cardiac defects, intrauterine growth restriction, craniofacial anomalies, and many common diseases. The purpose of this study was to test if folic acid (FA) can mitigate ER stress or improve recovery of cells from ER stress.

Biomarkers Of Orthodontic Tooth Movement, Ellie Schwartz, Shubdeep Kaur, Mahsa Mortazavi, Marie M. Tolarova, Mirek Tolar

Excellence Day

Orthodontic tooth movement is made possible by remodeling of the alveolar bone process. Bone remodeling is carried out by cellular activities of osteoclasts, osteoblasts, and osteocytes. This in turn is regulated by a number of extracellular factors including growth factors, cytokines, chemokines, hormones and biomechanical force. This review is focused on chemical biomarkers characterizing orthodontic tooth movement.

Geometric Morphometric Shape Assessment Of Juvenile Mandibles, Tiffany Tran, Vicki Lo, Hee Soo Oh, Gary D. Richards

Excellence Day

OBJECTIVES: We explore three-dimensional data to delineate idiosyncratic and progressive growth variation in 6.0-8.0 year old mandibles (n=45).

Variation In And Assessment Of Inferior Alveolar Nerve Block Landmarks In Children And Adolescents, Soi Park, Younjin Lee, Younyoung Lee, Tiffany Tran, Gary D. Richards

Excellence Day

OBJECTIVES: In earlier work (Lambert et al., 2017) we demonstrated the efficacy of new landmarks for inferior alveolar nerve (IAN) block injections. While the latter study focused on adult morphology, the landmarks were shown to be effective in cases where the M³/₃ were present but unerupted. Based on these result a question arose as to their applicability of the landmarks to children and adolescents, given the known changes in mandibular foramen position during growth. Here we quantify the position of the mandibular foramen relative to standard landmarks during growth and assess the new landmarks applicability for IAN …

Shear Bond Strength Of Nine Dual Cured Build-Up Materials And A Light-Curing Adhesive System On Dentin, Deepali Malla, Karen Schulze, Patrick Roetzer

Excellence Day

The purpose of this study was to measure the shear bond strength of nine different commercially available dual cured core build-up materials on human dentin in conjunction with a light curing adhesive system. The null hypothesis was that there is no statistical significant difference among the core build-up systems.

Root Analogue Implant Creation: Establishing Procedures For The General Dentist, Alicia Hazdovac, Sarah Osborne, Gary D. Richards

Excellence Day

The possibility of replacing damaged teeth with custom-made root analogue implants was initially suggested around 1969 and reintroduced by Lungren et al. in 1992. The latter authors created custom implants in titanium and reported good osteointegration and aesthetic results. Following this effort there has been an increasing focus on custom root analogue implants as a replacement for ‘screw-type’ implants. Given the availability of software to manipulate 3D image data and the rapid rise of 3D printing technology, the question arises as to whether a general dentist can produce their own implants. Here we test the feasibility of practitioners producing custom …

The Role Of Aryl Hydrocarbon Receptor (Ahr) Signaling Pathway In Oral Squamous Cell Carcinoma (Oscc): Preliminary Results., Renee Lee, Cui Xu, Leticia Ferreira, Ana Carolina Morandini, Erivan Ramos-Junior

Excellence Day

OBJECTIVES: A large number of experimental and clinical studies suggest that the origin of oral squamous cell carcinoma (OSCC) is linked to environmental carcinogenesis (tobacco, alcohol). Among these environmental factors, cigarette smoking is the most studied and has been associated with increased susceptibility to OSCC by activating signaling pathways responsible for cancer initiation and progression. Besides nicotine, cigarette smoke also contains aryl hydrocarbon receptor (AhR) agonists, such as dioxin and benzo(a)pyrene. Aberrant AhR expression and AhR pathway activation are involved in several types of cancer. However, the relationship between AhR pathway activation and oral cancer progression is still unclear.

Genes Associated With Mandibular Prognathism In The Chinese Population, Jacqueline Payne, Marie Tolarova M.D., Ph.D., D.Sc.

Excellence Day

Mandibular prognathism (MP) is the relationship of the mandible anteriorly positioned in relation to the cranial base. The prevalence of MP in Asians is estimated to be 15%, whereas American and European descent exhibit a 5% prevalence. Orthodontic treatment is lengthy and challenging, and severe cases require surgical intervention. However, when a treatment is planned well, the outcomes are predominantly successful. It has been known that genetics are involved in the etiology of prognathism and that greater genetic contribution corresponds to greater challenges to treatment. Thus, there is a desire to determine genes involved in the etiology of prognathism.

Socio-Economic Factors That May Contribute To Etiology Of Orofacial Clefts., Shubdeep Kaur, Mahsa Mortazavi, Geethapriya Kumar, Marie M. Tolarova

Excellence Day

Association of socio-economic status (SES) with congenital anomalies and diseases has been studied for many years. Under the umbrella of SES are several factors and they vary in different parts of the world due to differences in climate, ethnicity, and culture.

The purpose of this systematic review was to determine associations between various risk factors related to SES and prevalence of orofacial clefts (OFC).