Medicine and Health Sciences Commons^™

Evaluation Of Shear Bond Strength Of Two Resin-Modified Glass-Ionomer Cements, Emily Y. Ro

Theses and Dissertations

Purpose: To compare the in-vitro shear bond strengths of a new paste-paste formulation of resin-modified glass-ionomer cement (Rm-GIC) to an exising powder-liquid formulation. The study will test the hypothesis that the new paste-paste formulation of Rm-GIC (Fuji-Cem ™, GC Corp, Tokyo, Japan) has the same bond strength as an existing popular powder-liquid formulation of Rm-GIC (Rely-X ™ Luting Cement, 3M, St. Paul, MN)Materials and Methods: A total of 33 human molars were sectioned parallel to the occlusal surface to expose mid-coronal dentin and mounted parallel to the bond shearing device on the universal testing machine (Instron). For Group I samples …

Virginia Dental Journal (Vol. 80, No. 4, 2003)

Virginia Dental Journal

No abstract provided.

Increased Receptor-Mediated Gene Delivery To The Liver By Protamine-Enhanced-Asialofetuin-Lipoplexes, M. A. Arangoa, Nejat Düzgüneş, C. Tros De Ilarduya

All Dugoni School of Dentistry Faculty Articles

A novel lipidic vector composed of DOTAP/Chol liposomes, asialofetuin (AF), protamine sulfate and DNA has been developed. The resulting protamine-AF-lipoplexes improved significantly the levels of gene expression in cultured cells and in the liver upon i.v. administration. Lipoplexes containing the optimal amount of AF (1 μg/μg DNA) showed a 16-fold higher transfection activity in HepG2 cells than non-targeted (plain) complexes. The uptake by cells having asialoglycoprotein receptors (ASGPr) on their plasma membrane was decreased by the addition of free AF, indicating that AF-lipoplexes were taken up specifically by cells via ASGPr-mediated endocytosis. Results from transfections performed in cells defective in …

The Effect Of Endodontic Solutions On Resorcinol-Formalin Paste In Teeth, Madelyn Gay Gambrel

Theses and Dissertations

This study determined if any of six endodontic solutions would have a softening effect on resorcinol-formalin paste in extracted teeth, and if there were any differences in the solvent action between these solutions. Forty-nine single-rooted extracted teeth were decoronated two mm coronal to the CEJ, and the roots sectioned apically to a standard length of 15 mm. Canals were prepared to a 12mm WL and a uniform size with a #7 Parapost drill. Teeth were then mounted in a cylinder ring with acrylic. The resorcinol-formalin mixture was placed into the canals and was allowed to set for 60 days in …

J Am Coll Dent 2003 70 1

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.

J Am Coll Dent 2003 70 3

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.

The Bond Strength Of Adhesive Resin Cement: Time Differential Between Cementation And Finishing Of Cast Dowel-Cores, Purnima Joan Shahani

Theses and Dissertations

THE BOND STREGTH OF ADHESIVE RESIN CEMENT: TIME DIFFERENTIAL BETWEEN CEMENTATION AND FINISHING OF CAST DOWEL-CORES By Purnima Joan Shahani, D.D.S., M.S.A Thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Dentistry at Virginia Commonwealth University.Virginia Commonwealth University, 2003Major Director: Peter C. Moon, M.S., PhDDirector of VCU Dental Biomaterials LaboratoryThis study compared the retention of cast dowel-cores cemented with Panavia® 21 subjected to immediate versus delayed high-speed finishing. Conventionally, finishing is delayed for 24 hours to one week to allow for optimal setting and ultimate strength of the cement. Forty-five recently extracted human …

A Rural Vs. Urban Analysis Of Procedures Provided To Medicaid Recipients By Pediatric, General, And Public Health Dentists In The Commonwealth Of Virginia: Fiscal Years 1994-1995, Frank Carmen Pettinato

Theses and Dissertations

Purpose: The purpose of this study was to report the distribution of procedures provided to Virginia Medicaid children by three types of dental providers in rural and urban areas. Methods: Medicaid claims filed for dental patients younger than 21 were obtained and analyzed for fiscal years 1994 and 1995. Dental providers were categorized according to their practice type: general practice (GP), pediatric (PD) and public health (PH) dentists. Each type of practice was categorized as practicing in a Metropolitan, Urban, Rural or Completely Rural location and evaluated for percentages of preventive, diagnostic, and corrective services provided.Results: The number of procedures …

Utilization Of The Vacuum Form Machine: Custom Mouthguards Versus Esthetic Bleaching Trays, Jacqueline Michele Carney

Theses and Dissertations

Purpose: This study analyzed the percentage of Virginia practitioners utilizing vacuum form machines, types of appliances recommended, and types of patient information provided.Methods: Questionnaires were constructed and mailed to 2500 dentists.Results: 80% of dentists utilized vacuum form machines, 42.5% recommended mouthguards, 60.2% recommended home bleaching trays, 37.6% provided patient information on mouthguards, 37.1% provided patient information on home bleaching trays, 16.5% inquired on patient questionnaires about mouthguard protection during contact sports,and 17.3% inquired on patient questionnaires about tooth color satisfaction.Conclusions: Dentists use vacuum form machines for home bleaching trays more than mouthguards. General dentists and pediatric dentists provide patient information …

The Effect Of Chlorhexidine Gluconate As An Endodontic Irrigant On The Apical Seal: Long-Term Results, David B. Ferguson

Theses and Dissertations

The purpose of this study was to determine whether chlorhexidine gluconate (0.12%), used as an endodontic irrigating solution would affect the apical seal of three root canal cements. One hundred extracted human single-canal teeth were divided into 9 experimental groups of 10 teeth each, in addition to a positive and negative control group of 5 teeth each. The teeth were decoronated at the level of the cementoenamel junction, accessed, instrumented to a Master Apical File #50, irrigated with either sterile saline, 5.25% NaOCl or 0.12% chlorhexidine gluconate, and dried using paper points. Obturation was accomplished using lateral condensation and one …

Lip Profile Preferences In Varying Sagittal Mandibular Positions, Grant Gordon Coleman

Theses and Dissertations

The purpose of this study was to determine the influence of sagittal mandibular position on preferred lip position in profile. Five androgynous silhouette profiles differing only in the degree of mandibular retro- or prognathism (-25º, -18º, -11º, -4º, & +3º facial contour angles) were created. Using a computer animation program, evaluators moved the lips independently into the position deemed to be the most esthetic for each profile. Evaluators included adolescent orthodontic patients, parents of patients, and orthodontists. In general, no differences in preferred lip position were found between the –11º & -4º profiles or between the –18º & +3º profiles, …

An In-Vitro Comparison Of The Retention Of Prefabricated Parallel-Sided Vented Titanium Posts Cemented With Three Different Dual-Polymerizable Resin Cements, Maha Mamdouh Mostafa El-Sayed

Theses and Dissertations

AbstractAN IN-VITRO COMPARISON OF THE RETENTION OF PREFABRICATED PARALLEL-SIDED VENTED TITANIUM POSTS CEMENTED WITH THREE DIFFERENT DUAL-POLYMERIZABLE RESIN CEMENTSBy Maha M. El-Sayed, B.D.S., D.M.D.A Thesis submitted in partial fulfillment of the requirements for the degree of Master of Science at Virginia Commonwealth University.Virginia Commonwealth University, 2003Thesis Director: David R. Burns, D.M.D. Associate Professor and Program DirectorGraduate ProsthodonticsDepartment of ProsthodonticsPurpose: The purpose of this in-vitro study was to compare the retentive strength of an autopolymerizing resin cement to three dual-polymerizable resin cements when used to cement paraposts without light activation and to relate diametral tensile stress and hardness as a measure …

Ada News - 12/16/2002, 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.

Dentalgram - Vol. 16, No. 12, Loma Linda University School Of Dentistry

Dentalgram

In this issue:

• Dental hygiene students give to the community
• Thanksgiving basket project helps School families
• Plan now to attend 50th Anniversary Commemorative Celebration
• Faculty and staff attend 'Keeping Connected'
• Department news
• New course in intravenous sedation offered

Nasa Light-Emitting Diodes For The Prevention Of Oral Mucositis In Pediatric Bone Marrow Transplant Patients, Harry T. Whelan, James F. Connelly, Brian D. Hodgson, Lori Barbeau, A. Charles Post, George Bullard, Ellen V. Buchmann, Mary Kane, Noel T. Whelan, Ann Warwick, David Margolis

School of Dentistry Faculty Research and Publications

Objective: The purpose of this study was to determine the effects of prophylactic near-infrared light therapy from light-emitting diodes (LEDs) in pediatric bone marrow transplant (BMT) recipients.

Background Data: Oral mucositis (OM) is a frequent side effect of chemotherapy that leads to increased morbidity. Near-infrared light has been shown to produce biostimulatory effects in tissues, and previous results using near-infrared lasers have shown improvement in OM indices. However, LEDs may hold greater potential for clinical applications.

Materials and Methods: We recruited 32 consecutive pediatric patients undergoing myeloablative therapy in preparation for BMT. Patients were examined by two …

Assessment Of Human Alveolar Bone Density By Using Volumetric Ct Machine, Prasit Aranyarachkul

Loma Linda University Electronic Theses, Dissertations & Projects

This study evaluated bone density in designated implants sites using cone-beam computed tomography (CBCT) and compared the measurements to those of quantitative computed tomography (QCT) and subjective bone density evaluation. Sixty-two designated implant sites in 9 human cadavers jaws were used. Indicator rods, 2 mm in diameter, were placed in all sites. CT images representing 1 mm bucco-lingual slices immediately mesial and distal to the rods were selected for density evaluations. Bone density in Hounsfield units (HU) was assessed in a standardized implant area superimposed on the images, and also subjectively evaluated by 2 independent examiners using the Lekholm & …

The Effect Of Mandibular Distraction Osteogenesis On Condylar Rotation In Rabbits, Shelton Hsu

Loma Linda University Electronic Theses, Dissertations & Projects

Distraction osteogenesis (DO) is the gradual lengthening of a healing bone. This surgical technique can be applied to the jawbone to correct an asymmetry or deficiency of the mandible. DO has been added to the list of treatment options for patients with craniofacial anomalies or excessive dental crowding.

Although mandibular distraction osteogenesis has been successfully performed in many patients, the comprehensive effects on the TMJ are not fully understood. The purpose of this study is to compare the amount of rotational and positional change that occurs at the condyles when the rabbit mandible is widened at the midline and paramedian …

Ada News - 11/18/2002, 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 - 11/04/2002, 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.

Dentalgram - Vol. 16, No. 11, Loma Linda University School Of Dentistry

Dentalgram

In this issue:

• Fall Family Retreat at Pine Springs Ranch
• 2002 ADA/Dentsply Student Clinician Program
• IDP accepts class of May, 2004
• Lane Thomsen named chair, ODRP
• Classrooms 1176 & 1177 dedicated in the memory of Dr. Robert James
• Department news

Ada News - 10/21/2002, 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 - 10/07/2002, 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.

Dentalgram - Vol. 16, No. 10, Loma Linda University School Of Dentistry

Dentalgram

In this issue:

• Second Annual Celebration
• Brian Preston selected for ESP 2002-2003
• Orientation for new students
• School of Dentistry Fall Family Retreat
• Dr. Robert L. Frazer Jr., returns for Strategic Planning Retreat
• IDP graduation dinner
• Department news

Effects Of Occupational Ultrasonic Noise Exposure On Hearing Of Dental Hygienists: A Pilot Study, Jennifer Dunning Wilson, Michele Leonardi Darby, Susan L. Tolle, Joseph C. Sever Jr.

Dental Hygiene Faculty Publications

Purpose. The purpose of this case-control study was to determine whether long-term ultrasonic noise exposure via the dental office environment is related to dental hygienists' hearing status.

Methods. Registered dental hygienists (N - 698) who live in the Hampon Roads areas of Virginia were mailed a Dental Hygiene Word History Questionnaire to determine who would meet the inclusion criteria and would be willing to participate in the study. Consenting subjects were categorized into one of two groups, according to ultrasonic sealer usage rate, and matched on age. Persons with known hearing loss due to infection, disease, or congenital defect were …

Effects Of Daily Oral Care With 0.12% Chlorhexidine Gluconate And A Standard Oral Care Protocol On The Development Of Nosocomial Pneumonia In Intubated Patients- A Pilot Study, Michelle Lynn Bopp

Dental Hygiene Theses & Dissertations

The initial purpose of the study was to determine if a difference existed between nosocomial pneumonia rates for intubated patients who received twice daily oral hygiene care with 0.12% chlorhexidine gluconate and those who received the standard oral care while in the critical care unit (CCU). Over seven months (February - August), participants were identified through screening and consent procedures, and randomized into one of two groups. Over the seven months, only five subjects were enrolled. While in the study, twice-daily oral hygiene care consisting of brushing the cheeks, teeth and endotracheal tube with a suctioning toothbrush using an FDA …

Ada News - 09/16/2002, 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 - 09/02/2002, 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.

Dentalgram - Vol. 16, No. 09, Loma Linda University School Of Dentistry

Dentalgram

In this issue:

• In memoriam, Matthew Chun
• Students describe their mission service
• Careers in Dentistry Workshop
• School of Dentistry Fall Family Retreat
• Dr. Floyd Hansen assists dental clinics in Armenia
• Second Annual Celebration scheduled
• Department news

ประสิทธิภาพการฆ่าเชื้อของแคลเซียมไฮดรอกไซด์ ที่ระดับค่าความเป็นกรด-ด่างที่แตกต่างกันในห้องปฏิบัติการ, อังสนา ใจแน่น, เมตตจิตต์ นวจินดา, รัตน์ เสรีนิราช

Chulalongkorn University Dental Journal

วัตถุประสงค์ เพื่อศึกษาว่าที่ระดับค่าความเป็นกรด-ด่างและระยะเวลาเท่าใดของแคลเซียมไฮดรอกไซด์จึงจะ สามารถฆ่าเชื้อ 4 ตัวได้ วัสดุและวิธีการ เตรียมแคลเซียมไฮดรอกไซด์ผสมกับน้ํากลั่นให้ได้ระดับค่าความเป็นกรด-ด่าง 12.5, 12.0, 11.5, 10.5, 9.5, 8.5 และ 7.5 ใส่ลงไปในหลอดที่เตรียมเชื้อทั้ง 4 ตัวคือ เชื้อเอนเทอโรคอคคัส ฟิคัลลิส, เชื้อ แอคติโนมัยชีส วิสโคซุส, เชื้อสแตฟฟีโลคอคคัส ออเรียสและเชื้อสเตรปโตคอคคัส มิวแทนส์ ที่มีความเจือจาง เท่ากับแมคฟาแลนด์นัมเบอร์ 1 ตั้งทิ้งไว้ที่อุณหภูมิห้อง เมื่อครบ 10 นาที, 30 นาที, 1 ช.ม., 6 ซ.ม., 24 ซ.ม., 48 ซ.ม. และ 72 ซ.ม. นําสารในหลอด ใส่ในอาหารเลี้ยงเชื้อ 2 หลอดทุก ๆ ระดับค่าความเป็นกรด-ด่าง โดยมี น้ําเกลือเป็นตัวควบคุม นําอาหารเลี้ยงเชื้อเข้าตู้อบ 37°C เป็นเวลา 48 ช.ม. แล้วอ่านผลโดยดูจากความขุ่น ถ้าขุ่น แสดงว่ามีการเจริญของเชื้อ ทําซ้ํา 3 ครั้ง ตอนที่ 2 เตรียมแคลเซียมไฮดรอกไซด์ให้ได้ค่าความเป็นกรด-ด่าง เหมือนในตอนแรก นําเชื้อที่เจือจางแล้ว ใส่ลงไปในสารที่เตรียมไว้ อ่านค่าความเป็นกรด-ด่างตามเวลาที่เปลี่ยน ไปเหมือนตอนแรก ทําการทดลองซ้ํา 3 ครั้งนํามาหาค่าเฉลี่ย ผลการศึกษา เชื้อทั้ง 4 ตัวสามารถถูกทําลายโดยแคลเซียมไฮดรอกไซด์ที่ระดับค่าความเป็นกรด-ด่าง 12.5 โดย ค่าเฉลี่ยการลดลงของความเป็นกรด-ด่างเริ่มต้นที่ 12.5 มีความแตกต่างจากกลุ่มอื่นอย่างมีนัยสําคัญทางสถิติ (Repeated-Measures ANOVA ที่ p0.00) ส่วนค่าความเป็นกรด-ด่างที่ต่ํากว่า 10 ไม่สามารถทําลายเชื้อตัวใดได้เลย โดยใช้เวลาในการสัมผัสกับแคลเซียมไฮดรอกไซด์แตกต่างกัน เชื้อสเตรปโตคอคคัส มิวแทนส์ ใช้เวลา 30 นาที เชื้อแอคติโนมัยชีส วิสโคซุส …

การศึกษาเปรียบเทียบประสิทธิภาพของสารต่างๆ ที่ใช้ในการดึงเกลือแร่, วิจิตรา วิพิตมากูล, จุลจักร ตั้งยิ่งยง, สุชีรา พงษ์พันธ์

Chulalongkorn University Dental Journal

วัตถุประสงค์ เพื่อเปรียบเทียบประสิทธิภาพของสารที่ใช้ดึงเกลือแร่ 3 ชนิด คือ เอทิลีน ไตเอมีน เตตรา อะซิติก แอซิด (อีดีทีเอ) กรดฟอร์มิก และกรดไนตริกฟอร์มาลีน โดยพิจารณาจากระยะเวลาที่ใช้ ราคา วิธีการเตรียมสาร และการสูญเสียของเนื้อเยื่อ วัสดุและวิธีการ ใช้ฟันกรามใหญ่ที่สาม จํานวน 12 ซี่ แบ่งเป็น 3 กลุ่ม กลุ่มที่ 1 ดึงเกลือแร่โดยใช้อีดีทีเอ กลุ่ม ที่ 2 ใช้กรดฟอร์มิก และกลุ่มที่ 3 ใช้กรดไนตริกฟอร์มาลีน เปรียบเทียบระยะเวลาที่ใช้ดึงเกลือแร่จนสมบูรณ์ซึ่ง ตรวจสอบโดยวิธีการใช้สารเคมี เปรียบเทียบราคาของสารแต่ละชนิดและศึกษาการเปลี่ยนแปลงของเนื้อเยื่อฟัน หลังจากถูกดึงเกลือแร่ ผลการศึกษา กรดไนตริก ฟอร์มาลีนดึงเกลือแร่จากฟันได้เร็วที่สุดคือ 102.0 ชั่วโมง รองลงมาคือ กรดฟอร์มิก 148.5 ชั่วโมง และ อีดีทีเอ 696.8 ชั่วโมง การเปรียบเทียบราคาต่อขบวนการ คือ อีดีทีเอ 395.43 บาท กรดฟอร์มิก 89.10-148.50 บาท และกรดไนตริกฟอร์มาลีน 21.17-30.26 บาท กรดไนตริกฟอร์มาลีนเป็นสารเพียงชนิดเดียว ที่ทําให้เกิดการเปลี่ยนสีและเกิดการสูญเสียเนื้อเยื่อฟัน สรุป กรดไนตริกฟอร์มาลีนใช้เวลาน้อยที่สุดในการดึงเกลือแร่และมีราคาถูกที่สุดแต่มีข้อเสีย คือ อาจทําให้มีการ สูญเสียเนื้อเยื่อฟัน กรดฟอร์มิกซึ่งใช้เวลามากกว่า และมีราคาสูงกว่า เหมาะสมในการใช้งานด้านบริการ เนื่องจาก ไม่ทําให้เกิดการสูญเสียเนื้อเยื่อ แต่อีดีทีเอไม่เหมาะในการใช้งานด้านบริการเพราะใช้เวลานานมากและมีราคาสูง