Medicine and Health Sciences Commons^™

Ada News - 12/11/2006, 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.

Managing Complications Of Radiation Therapy In Head And Neck Cancer Patients: Part Ii. Management Of Radiation-Induced Caries, W. L. Chai, W.C. Ngeow, R. Ramli, R. A. Rahman

Wei Cheong Ngeow

Head and neck cancer is becoming a more recognizable pathology to the general population and dentists. The modes of treatment include surgery and/or radiation therapy. Where possible, pretreatment dental assessment shall be provided for these patients before they undergo radiation therapy. There are occasions, however, whereby head and neck cancer patients are not prepared optimally for radiation therapy. Because of this, they succumb to complicated oral complications after radiation therapy. The management of xerostomia has been reviewed in Part I of this series. In this article, the management of dental caries, a sequalae of xerostomia following radiation therapy is reviewed. …

Managing Complications Of Radiation Therapy In Head And Neck Cancer Patients: Part I. Management Of Xerostomia, W.C. Ngeow, W. L. Chai, R. A. Rahman, R. Ramli

Wei Cheong Ngeow

Head and neck cancer is becoming a more recognizable pathology to the general population and dentists. The modes of treatment include surgery and/or radiation therapy. Where possible, pretreatment dental assessment shall be provided for these patients before they receive radiation therapy. There are occasions, however, whereby head and neck cancer patients are not prepared optimally for radiation therapy. Because of this, they succumb to complicated oral adverse effects after radiation therapy. Part I of this series reviews the management of xerostomia. The management of the effect of xerostomia to the dentition/oral cavity is discussed in Part II. © 2006 Elsevier. …

Managing Complications Of Radiation Therapy In Head And Neck Cancer Patients: Part V. Management Of Mucositis, W.C. Ngeow, W. L. Chai, R. A. Rahman, R. Ramli

Wei Cheong Ngeow

Head and neck cancer is becoming a more recognizable pathology to the general population and dentists. The modes of treatment include surgery and/or radiation therapy. Where possible, pretreatment dental assessment shall be provided for these patients before they undergo radiation therapy. There are occasions, however, whereby head and neck cancer patients are not prepared optimally for radiation therapy. Because of this, they succumb to complicated oral adverse effects after radiation therapy. The second last part of this series reviews and discusses the management of complication that commonly occur to the oral mucosa, i.e. mucositis. © 2006 Elsevier. All rights reserved.

Managing Complications Of Radiation Therapy In Head And Neck Cancer Patients: Part Vi. Management Of Opportunistic Infections, W.C. Ngeow, W. L. Chai, R. Ramli, R. A. Rahman

Wei Cheong Ngeow

Head and neck cancer is becoming a more recognizable pathology to the general population and dentists. The modes of treatment include surgery and/or radiation therapy. Where possible, pretreatment dental assessment shall be provided for these patients before they undergo radiation therapy. There are occasions, however, whereby head and neck cancer patients are not prepared optimally for radiation therapy. Because of this, they succumb to complicated oral adverse effects after radiation therapy. The last part of this series reviews the opportunistic infections that can occur to the perioral structure. Their management is briefly discussed. © 2006 Elsevier. All rights reserved.

Managing Complications Of Radiation Therapy In Head And Neck Cancer Patients: Part Iv. Management Of Osteoradionecrosis, R. Ramli, W.C. Ngeow, R. A. Rahman, W. L. Chai

Wei Cheong Ngeow

Head and neck cancer is becoming a more recognizable pathology to the general population and dentists. The modes of treatment include surgery and/or radiation therapy. Pretreatment dental assessment should be provided for these patients before they undergo radiation therapy. There are occasions, however, whereby head and neck cancer patients are not prepared optimally and, as a result, they succumb to complicated oral adverse effects after radiation therapy. Osteoradionecrosis (ORN) is a severe debilitating condition that impairs healing due to reduction in vascularity and osteocyte population in the affected bone. This article reviews methods of treatment used to treat ORN such …

Transient Loss Of Power Of Accommodation In 1 Eye Following Inferior Alveolar Nerve Block: Report Of 2 Cases, W.C. Ngeow, C. K. Shim, W. L. Chai

Wei Cheong Ngeow

Unintended intravascular injection from inferior alveolar nerve blocks can result in frustrating distant complications affecting such structures as the middle ear and eyes. Possible complications affecting the eyes include blurring of vision, diplopia, mydriasis, palpebral ptosis and amaurosis ( temporary or permanent). In this article, we present a complication that has been reported only rarely. Two patients developed transient loss of power of accommodation of the eye resulting in blurred vision after routine inferior alveolar nerve blocks on the ipsilateral side. Clear vision returned within 10 - 15 minutes after completion of the blocks. The possible explanation for this phenomenon …

Managing Complications Of Radiation Therapy In Head And Neck Cancer Patients: Part Iii. Provision Of Dentures, R. A. Rahman, W.C. Ngeow, W. L. Chai, R. Ramli

Wei Cheong Ngeow

Head and neck cancer is becoming a more recognizable pathology to the general population and dentists. The modes of treatment include surgery and/or radiation therapy. Pretreatment dental assessment should be provided for these patients before they undergo radiation therapy. There are occasions, however, whereby head and neck cancer patients are not prepared optimally and, as a result, they succumb to complicated oral adverse effects after radiation therapy. The management of radiation-induced caries, a sequelae of xerostomia has been reviewed in Part II of this series. In this article, the management of difficulty with dentures, another sequelae of xerostomia following radiation …

Immediate Surgical Repositioning Following Intrusive Luxation: A Case Report And Review Of The Literature, H. Cem Güngör, S. Burcak Cengiz, Nil Altay

School of Dentistry Faculty Research and Publications

This report presents a case of severe intrusive luxation of mature maxillary lateral incisor in a 10-year-old boy. The intruded tooth was immediately repositioned (surgical extrusion) and splinted within 2 h following injury. Tetracycline therapy was initiated at the time of repositioning and maintained for 10 days. Pulp removal and calcium hydroxide treatment of the root canal was carried out after repositioning. Splint was removed 1 month later. Definitive root canal treatment with gutta percha was accomplished at the second month recall. Clinical and radiographic examination 28 months after the surgical extrusion revealed satisfactory apical and periodontal healing.

A Continued Investigation Of Craniofacial Growth In Infant Heart Transplant Recipients Receiving Cyclosporine, Gabriel Enriquez

Loma Linda University Electronic Theses, Dissertations & Projects

Since the mid 1980’s, Cyclosporine has proved to be an effective immunosuppressive drug and now has a widespread application in organ transplantation. Several studies, however, have implicated cyclosporine as adversely affecting craniofacial growth in the pediatric population. ^16,18 The purpose of this follow-up study was to continue to evaluate the possible untoward effects of long-term use of cyclosporine on craniofacial growth in a group of infant heart transplantation recipients by re-evaluating as many subjects as possible from the original study and evaluating new subjects. A pediatric group (N=13) was composed of six Caucasian subjects (4 male and 2 female, ages …

Resorbable Barrier Effect In Sinus Graft Using Anorganic Bone, Kyung-Soo Choi

Loma Linda University Electronic Theses, Dissertations & Projects

The effect of a resorbable membrane on new bone formation in human maxillary sinus augmentation using anorganic bovine material is unclear at the present time. As a pilot study, six patients who required bilateral maxillary sinus augmentations for endoessous dental implant treatment were grafted with anorganic bovine bone material. All six patients had a resorbable collagen membrane placed over the graft material on only one side for the sinus augmentation. At the time of implant placement, a minimum of 8 months following sinus graft healing, a biopsy was made of each side to permit histomorphometric analysis.

Similar amounts of new …

Variability In Selecting Lateral Cephalometric Landmarks In Two Cbct Image Modes, Dana Nguyen

Loma Linda University Electronic Theses, Dissertations & Projects

Purpose: The purpose of this study was to determine the variability of lateral cephalometric landmark selection in two cone beam computed tomography (CBCT) lateral cephalometric simulations: 1) a mean projection image (MPI) and 2) a serial sagittal slice image (SSSI).

Methods: A MPI is a two-dimensional (2D) image obtained from the NewTom 3G^TM CBCT that resembles the conventional lateral cephalogram. A SSSI is a 2D image also obtained from CBCT data, but is created by superimposing a series of selected thin sagittal slices containing the required cephalometric landmarks. This study compared the Ricketts and Steiner analysis of the MPI …

Ada News - 11/20/2006, 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 - 11/06/2006, 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.

Buccal And Palatal Talon Cusps With Pulp Extensions On A Supernumerary Primary Tooth, Esin Siraci, H. Cem Güngör, Zafer C. Cehreli, B. Taner

School of Dentistry Faculty Research and Publications

This paper reports an unusual occurrence of talon cusp on a supernumerary primary incisor, presenting on both labial and palatal sides. The tooth was scheduled for extraction due to its interference with the occlusion. Morphometric analysis of the taloned cusps was performed on digitized replicas of the tooth crown using open-source image analysis toolkit (ImageJ). Further non-destructive investigation of the taloned crown under cone-beam X-ray computed tomography revealed pulpal extensions in both talon cusps.

Ada News - 10/16/2006, 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.

Detection Of The Argonaute Protein Ago2 And Micrornas In The Rna Induced Silencing Complex (Risc) Using A Monoclonal Antibody, K. Ikeda, M. Satoh, Kaleb M. Pauley, M. J. Fritzler, W. H. Reeves, E. K. Chan

Science and Mathematics Faculty Publications

MicroRNAs (miRNAs) are short RNA molecules responsible for post-transcriptional gene silencing by the degradation or translational inhibition of their target messenger RNAs (mRNAs). This process of gene silencing, known as RNA interference (RNAi), is mediated by highly conserved Argonaute (Ago) proteins which are the key components of the RNA induced silencing complex (RISC). In humans, Ago2 is responsible for the endonuclease cleavage of targeted mRNA and it interacts with the mRNAbinding protein GW182, which is a marker for cytoplasmic foci referred to as GW bodies (GWBs). We demonstrated that the antiAgo2 monoclonal antibody 4F9 recognized GWBs in a cell cycle …

Ada News - 10/02/2006, 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.

Vital Tooth Whitening: Effects On Tooth Color Satisfaction, Beliefs About Dentofacial Appearance, And Self-Esteem In Older Adults, Kelly Marie Seeber

Dental Hygiene Theses & Dissertations

The purpose of this study was to explore the effects of vital tooth whitening on tooth color satisfaction, beliefs about dentofacial appearance, and self-esteem in a population 50 years of age and older. A two-group, randomized, pre-test, post-test, single-blind design was utilized following !RB-approval. Sixty-two participants were enrolled. Fifty-three participants (N=53) completed the study with no adverse events reported. Both the control and experimental groups received instructions for a threeweek oral self-care regimen, a toothbrush, toothpaste, and floss. The experimental group also received a tooth whitening product (independent variable) to be used during the same three-week period. Dependent variable measures …

In Vitro Evaluation Of The Reciprocating Disposable Prophylaxis Angle Versus The Rotating Disposable Prophylaxis Angle In Extrinsic Stain Removal Effectiveness, Inma Lacross

Dental Hygiene Theses & Dissertations

The purpose of this study was to determine the extrinsic tooth stain removing effectiveness of a 90° counter-rotating disposable prophylaxis angle (DPA) with rubber cup as compared to the traditional 360° unirotational DPA with rubber cup. Four randomly assigned groups of cleaned, sterilized, extracted human teeth, artificially stained with coffee, tea, tobacco, and red wine were polished on the buccal and lingual surfaces using one of the two rubber cup DP As under study. Each dependent variable (four different stain types) was tested four times with each prophylaxis angle, using each of the four prophylaxis paste conditions, and three different …

Ada News - 09/18/2006, 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 - 09/04/2006, 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.

Identification Of Porphyromonas Gingivalis From The Pocket With Advanced Periodontitis By Pcr Method, Jintakorn Kuvatanasuchati

Chulalongkorn University Dental Journal

Objective The purpose of this study was to confirm identification of Porphyromonas gingivalis by using the PCR method. Materials and methods Black pigmented Bacteroides (No.1, No.2 and No.3) were isolated from the pockets of three advanced periodontitis patients who came to Periodontal Department of Faculty of Dentistry, Chulalongkorn University for periodontal disease treatment. These bacterias were cultured on brain heart infusion-yeast extract blood (sheep) agar [BHI blood agar] in anaerobic chamber which contained 80% N2, 10% H2 and 10% CO2 at 37°C for 10 days. After these bacterias had already grown. DNA was isolated and amplified for using the PCR …

Prevalence Of Medical Emergencies In Dental Practices And Emergency Management Preparedness Of Thai Dentists, Jirawan Jirakijja, Boonyarith Sa-Ardaium, Sutha Phattharasupharerk

Chulalongkorn University Dental Journal

Objective To study the types and prevalence of medical emergencies occurring in dental practices. The evidence-based data may provide a guidance in which emergencies the dentists should be competent to manage and may contribute to improvement in undergraduate training in the field of emergency care. Materials and methods The descriptive study was conducted by forwarding questionnaires to a sample of 4,000 dentists randomly selected from the Thai Dental Association's registry. The period of this postal survey was from January to February 2005. Results The were 464 returns, a response rate of 11.6%. The most frequently reported emergency was fainting or …

Effect Of Casein Phosphopeptide - Amorphous Calcium Phosphate On Hardness Of Enamel Eroded By A Cola Drink, Hathaichanok Sukasame, Muratha Panich, Suchit Poolthong

Chulalongkorn University Dental Journal

Objective The present study was to compare hardness of enamel, eroded enamel by a Cola drink and remineralized enamel by casein phosphopeptide - amorphous calcium phosphate (CPP-ACP) and to compare remineralization effect of CPP-ACP to that of artificial saliva Materials and methods The specimens were prepared from 11 extracted human premolars, separated in 4 groups to be applied and soked in 1) CPP - ACP 2) artificial saliva 3) CPP - ACP with artificial saliva and 4) deionized water. The Vickers hardness was measured at cutting surface 200 microns away from outer surface. Baseline, eroded and after experiment hardness were …

Exercising Behavior Of Dental Students, Yuttasak Siangchum, Rachot Klabprathum, Patita Bhuridej

Chulalongkorn University Dental Journal

Objective (1) to study the exercising behavior of dental students and the relationship between years of study and exercising time and (2) to study the prevalence of neck ache and backache of dental students. Materials and methods A self-administered questionnaire was distributed to a group of dental students of Chulalongkorn University in 2005. A stratified random sampling technique was used. Results One hundred and ninety-four students returned the questionnaire giving a response rate of 100% (57 males and 137 females). Fourteen percent of them reported that they exercise regularly. The sixth-year-student had the highest frequency of exercising (27.3%) while the …

Implant Replacement Of Bilateral Congenitally Missing Maxillary Lateral Incisors: A Case Report, Wantanee Pruksawangwong

Chulalongkorn University Dental Journal

A case of patient with bilateral congenitally missing maxillary lateral incisors which require an interdisciplinary treatment is presented. The orthodontic treatment is for correcting the alignment and axial inclination of the teeth and preparing appropriated space between the maxillary central incisors and canines. Then the implants are albe to restore esthetically and efficiently. This article describes the considerations regarding the proportion of the crowns and implants, the amount of space between the crowns and roots of the adjacent teeth, the quantity and quality of the alveolar bone, the periodontal health, and the orthodontic technique.

Salivary Flow Rates And Candida Albicans In Subjects With Geographic Tongue, Pornpan Piboonratanakit, Teerawat Chanbanjon, Pakvouttinun Yonokpant, Lakana Luangjarmekorn

Chulalongkorn University Dental Journal

Objective To determine characteristics, symptoms and the correlation of salivary flow rates and detection of Candida albicans in subjects with geographic tongue. Materials and methods Analytical and experimental study in 25 and 21 subjects with and without geographic tongue, respectively. Data about characteristics, symptoms and numbers of geographic tongue were compared by descriptive analysis. Unstimulated and stimulated saliva were spitted and C. albicans were detected by Periodic-Acid-Schiff stain and culture. Analytic statistics in umpaired t test was used to compare salivary flow rates. The correlations of symptoms, salivary flow rates and detection of Candida were analyzed by chi-square test. Results …

In Vitro Antimicrobial Efficacy Of Calcium Hydroxides In Root Dentin, Josef W. Lubisich

Loma Linda University Electronic Theses, Dissertations & Projects

Enterococcus faecalis is the most commonly isolated bacteria in failed root canal treatment. Endodontic intracanal medicaments are commonly tested using standardized bovine cylinders infected with bacteria. The literature is not clear on whether calcium hydroxides are able to remove E. faecalis from the dentinal tubules. One reason for this is that there are several varying forms of calcium hydroxide commonly used. The purpose of the present experiment was to determine whether four commonly used calcium hydroxide products were able to reduce E. faecalis from four incremental samples of dentin and to determine if there was a statistically significant difference between …

Influence Of Common Orthodontic Appliances On Magnetic Resonance Imaging, Joseph Matthew Elison

Loma Linda University Electronic Theses, Dissertations & Projects

Magnetic resonance imaging (MRI) is an essential diagnostic tool in modern medicine. Conditions such as cerebral vascular accidents, epilepsy and other seizure disorders, autism, cancer, migraine and cluster headaches benefit from its use. It has been discovered that 4-10% of all children and adolescents will experience a seizure at some point (Hauser, 1994) and MRI is one of the most common imaging modalities for seizure and epilepsy diagnosis. Unfortunately, some orthodontic materials cause distortion on MR images. Radiologists would probably require the removal of any distortion-causing orthodontic appliance prior to MR imaging. It is questionable whether radiologists would be comfortable …