Medicine and Health Sciences Commons^™

An In Vitro Study Comparing The Conventional Step-Back Instrumentation Technique To A Combination Step-Back/Ultrasonic Technique, James A. Eberhardt

Loma Linda University Electronic Theses, Dissertations & Projects

Cleaning and shaping the root canal system is an important phase of endodontic therapy, and must be performed thoroughly and completely if successful root canal therapy is to be expected. A number of investigators have compared different methods of cleaning and shaping of the root canal system. The purpose of this study was to compare the effectiveness of the conventional step-back technique with that of a combination step-back/ultrasonic technique. This combination technique is a modification of the conventional step-back technique using an ultrasonic instrument alternately with hand instrumentation. Utilizing 40 canals from extracted human mandibular molar teeth with a curvature …

Ua66/4/2 Allied Health Department Newsletter Issue No. 3, Wku Allied Health

WKU Archives Records

Newsletter created by and about WKU Allied Health.

Recovery Of Broken Dental Needle By Fluoscope(การใช้ฟลูโอสโคปช่วยค้นหาเข็มฉีดยาชาหักทางทันตกรรม), Sittichai Tudsri

Chulalongkorn University Dental Journal

The Fluoscope was applied to locate and find out the broken needle, which occured during an inferior alveolar nerve block. It is very simple method and not harmful for surgical removal of the broken dental needle. (รายงานการใช้ฟลูโอสโคปช่วยค้นหาเข็มฉีดยาชาที่หักขณะทําการฉีดยาสกัดเส้นประสาทอินฟีเรียอัลวีโอลาร์ นับเป็นวิธีการที่สะดวกง่ายรวดเร็วที่สุด และไม่ทําให้เกิดอันตรายภายหลังการผ่าตัดเอาเข็มออก)

Vascular Pattern Of Gingiva In Relating To The Alveolar Bone (โครงสร้างเส้นเลือดของเหงือกในความสัมพันธ์กับกระดูกขากรรไกร), Tussanee Darongsuwan

Chulalongkorn University Dental Journal

The vascular pattern of the gingival crevice in relating to the alveolar bone was studied in rats using the SEM vascular casting technique. The crevicular vasculature demonstrated two types of morphology: planar plexus and coiled vascular loop. The planar plexuses were found subjacent to the crevicular epithelium extending from the gingival margin to the epithelium attachment while the coiled loops were found at the middle third of the crevice. The loops arise from the ascending vessels of the planar network underneath, coiled and drained into the larger vessels refered to post-capillary venules and collecting venules. The variation of the vascular …

Periodontal Change After Initial Treatment (Hygienic Phase)(การเปลี่ยนแปลงสภาวะปริทันต์ ภายหลังการรักษาในระยะเริ่มแรก), Narongsak Laosrisin, Daungrut Krongrava, Nuchjaree Pongnaris

Chulalongkorn University Dental Journal

This study sought to evaluate the periodontal change after initial treatment (hygeinic phase) by means of probing pocket depth and clinical attachment level. The decreasing in pocket depth and the gain of attachment level were statistically analized by analysis of variance (ANOVA). After initial treatment, 98% of the patients showed the decreasing in pocket depth while only 80% of them demonstrated the attachment gain. The clinical improvment in the different groups of severity sites of probing depth 3, 4, 5 and ≥ 6 mm. from 3232 sites were examined. The decreasing in probing pocket depth and gain of attachment level …

Classfication Of 13 Teenage And Adult Toothbrush Types According To Roundedness And Diameter Of Bristles (การจําแนกกลุ่มแปรงสีฟันวัยรุ่น และผู้ใหญ่ 13 ชนิด จากความมันกลม และขนาดเส้นผ่าศูนย์กลางของขนแปรง), Chutima Trairatvorakul, Nalina Narongchaikul, Waleerach Chayayon

Chulalongkorn University Dental Journal

Thirteen types of toothbrushes were classified into 4 groups according to the percentage of roundedness and diameter size of bristles. Twentyfive bristles from each of ten, thirteen brand toothbrushes, roundomly selected were evaluated for roundedness under stereomicroscope at 40x magnification by two investigators, while 30 bristles randomly selected from 6 tooth- brushes of each brand were filmed under scanning electron microscope at 35x magnification and measured for sizes of diameters. The findings were at α = 0.05 confident level, the proportion of roundedness ranged from Oral-B, the highest (0.226) to the lowest, Colgate & Bulter Gum (0.004). The credibility between …

Substitution For Retentive Pins In Amalgam Restorations(รีเทนชันที่สามารถใช้ทดแทนรีเทนทีฟพิน ในการบูรณะฟันด้วยอมัลกัม), Daranee Tantbirojn, Lalida Sukonthaman

Chulalongkorn University Dental Journal

Various types of pins become popular retentive devices for extensive amalgam restorations but several disadvantages are associated with their uses. Alternative methods of auxillary retention have been suggested. Studies indicated that some of them provide as much retention and resistance for restorations as do retentive pins. This acticle reviews the proper use of retentive pins and describes other substitutional methods such as Amalgapin, retentive slot, modified cavity preparation utilizing available tooth structure, including the use of dentin bonding agents. These methods can be used as substitutional retentions to retentive pins in extensive amalgam restorations.(ในการบูรณะฟันที่มีการสูญเสียเนื้อฟันไปมากด้วยอมัลกัม โดยใช้รีเทนทีฟฟินช่วยเพิ่มรีเทนชัน มักจะเกิดการแตกหักของเนื้อฟันส่วนที่เหลือ และมีข้อควรระวังในการทําหลายประการ จึงมีความพยายามหารีเทนชันอื่น เพื่อทดแทน ได้แก่ …

Hemisection And Root Amputation In Furcation Involved Teeth(การตัดแบ่งครึ่งฟัน และการตัดรากในฟัน ที่มีรอยโรคบริเวณช่องรากฟันกราม), Thitiporn Panpothong, Narongsak Laosrisin

Chulalongkorn University Dental Journal

Hemisection and root amputation are still significant therapeutic procedures in furcation involved teeth. This article emphasizes what dentist should know well prior to the treatment as for diagnosis, anatomical features of the furca, root and supporting bone, indication and contraindication, procedure technique and restoration after hemisection and root ampution, including factors which lead to failure.(การตัดแบ่งครึ่งฟันและการตัดรากฟันเป็นวิธีการหนึ่งในการรักษาผู้ป่วยโรคปริทันต์ที่มีรอยโรคบริเวณช่องรากฟันกราม บทความนี้กล่าวถึงสิ่งที่ทันตแพทย์ควรทราบก่อนจะพิจารณาให้การรักษาด้วยวิธีนี้ ได้แก่ การวินิจฉัยรอยโรค ลักษณะทางกายวิภาคศาสตร์ของช่องรากฟันกราม รากฟันและกระดูก ข้อบ่งชี้ และข้อห้าม วิธีการตัดแบ่งครึ่งฟันและตัดรากฟัน การการรักษาไม่ประสบผลสําเร็จ)

Nasolabial Cyst: Report Of Case(ถุงน้ำนาโซเลเบียล : รายงานผู้ป่วย 1 ราย), Saengthip Yanajaree

Chulalongkorn University Dental Journal

This report concerns the case of a 41-year-old male patient who had a rare condition of nasolabial cyst on the left side which developed outside the bone in the maxillofacial area under the ala of the nose and distorted left nostril. The patient also had pain on the upper left lateral and canine teeth which was from another cause. Differential diagnosis and treatment were performed. Over a 6-year follow-up period, no recurrence of the lesion had been found.(รายงานผู้ป่วยชายไทยคู่อายุ 41 ปี มีถุงน้ำนาโซเลเบียลซึ่งพบได้น้อย เกิดขึ้นนอกกระดูกขากรรไกร บนด้านหน้าใต้ปีกจมูก บริเวณเหนือปลายรากฟันหน้าบนซ้าย โดยฟัน # 22 และ # 23 มีอาการร่วมด้วยซึ่ง เนื่องมาจากสาเหตุอื่น สามารถทําการวินิจฉัยแยกออกจากโรคอื่นและทําการรักษาได้ จากการติดตามผลเป็น ระยะเวลา 6 ปี พบว่าไม่กลับมาเป็นใหม่อีก)

Gcf Used For Monitoring Periodontal Severity(การใช้ Gcf เพื่อพยากรณ์ความรุนแรงของโรคปริทันต์), Sookjit Yanajaree

Chulalongkorn University Dental Journal

GCF is an inflammatory exudate in the gingival crevice of inflamed gingiva. It contains, in varying amounts, substances derived from products of tissue breakdown, products of microbial plaque, products of host cell, and products of host immunity which are in proportional to periodontal severity. The quantity and components of GCF can be used to predict the severity of periodontal disease which is beneficial for further treatment.(GCF เป็นสารคัดหลั่งจากการอักเสบที่มีอยู่ในร่องเหงือก ประกอบด้วยเซรุ่มและส่วนประกอบต่าง ๆ ที่เกี่ยวข้องกับการอักเสบ สามารถจัดเก็บเพื่อตรวจหาสารและวัดปริมาณสารได้ สารบางตัวที่มาจากเนื้อเยื่อยึดต่อ ที่ถูกทําลายจากคราบจุลินทรีย์ใต้เหงือก จากเซลล์ของร่างกายที่ปฏิบัติหน้าที่อยู่บริเวณอวัยวะปริทันต์ และจาก ระบบภูมิคุ้มกันของร่างกายนั้นเป็นสัดส่วนกับระดับความรุนแรงของโรคปริทันต์ ดังนั้นการตรวจหาและทราบถึงปริมาณของสารใน GCF สามารถใช้ทํานายโรคและระดับความรุนแรงของโรคได้เพื่อใช้เป็นแนวทางในการ วางแผนการรักษาต่อไป นอกจากนี้ลําพังปริมาณ GCF ก็ใช้แทนดัชนีบอกความรุนแรงของเหงือกอักเสบได้)

The Study Of Preservative Effectiveness In Fluoride Mouthwash Formulation(การศึกษาประสิทธิภาพของสารกันบูดในตํารับยาอมบ้วนปากฟลูออไรด์), Vanida Sangalungkarn, Ratchapin Srisatjaluk

Chulalongkorn University Dental Journal

Four preservatives in various concentration (w/v) ie: paraben mixtures (0.2% methyl paraben plus 0.02 or 0.04% propyl paraben), 0.4% sodium benzoate, 0.4% sodium benzoate plus 0.1% benzonic acid, 0.034% thymol, and 0.8% potassium sorbate, were tested for their microbicidal activities in fluoride mouthwash formulas. All passed the preservative effectiveness test. We found that 0.4% sodium benzoate and 0.034% thymol were fungistatic to Aspergillus nigar. These two preservatives could also be fungicidal if 0.1% benzoic acid was added to the former and the alcohol content was raised from 5 to 12% with the latter.(รายงานนี้แสดงผลการศึกษาประสิทธิภาพของสารกันบูดแต่ละชนิดในตํารับยาอมบ้วนปากฟลูออไรด์ สารกันบูดที่คัดเลือกมาทดสอบมีขนาดความเข้มข้น (น้ำหนัก/ปริมาตร) ดังนี้ ส่วนผสมของพาราเบน (0.2% เมธทิล พาราเบนและ …

Development Of Periapical Lesions In Immunosuppressed Rats, Phillip A. Waterman Jr.

Loma Linda University Electronic Theses, Dissertations & Projects

The pathogenesis of periapical lesions is the interaction of the oral flora with the existing host defenses. The role of bacteria has been established in endodontic disease but the contribution of the host defenses in periapical lesion formation is less clear. The purpose of this study was to compare periapical lesion development in immunosuppressed rats with that in normal rats. Thirty-five, eight-week old Sprague-Dawley rats were equally divided into seven groups. Groups 1, 2, and 3 were given weekly injections of Cytoxan, an immunosuppressive agent. Groups 4, 5, and 6 received no immunosuppressive therapy. Group 7 served as a control, …

Antibacterial Effects Of Various Endodontic Irrigants And Medicaments On Selected Anaerobic Bacteria, Patrick K. Ohara

Loma Linda University Electronic Theses, Dissertations & Projects

This study was undertaken to determine the antibacterial effects of various endodontic irrigants and medicaments against six selected anaerobic bacteria. In part 1, the organisms were mixed separately with dilutions of six irrigants in tubes containing fluid thioglycolate broth and allowed to remain in contact for specific time periods before being evaluated for growth. In part 2, the vapors of six medicaments were tested using agar plates streaked with the bacteria.

For part 1, the six irrigants were ranked as to their ability to inhibit bacterial growth. Statistical analysis showed that chlorhexidine and hydrogen peroxide were significantly more effective as …

Retrofilling Materials : The Effects Of Two Setting Times On The Degree Of Dye Leakage Of Retrograde Filling Materials, Robert K. Higa

Loma Linda University Electronic Theses, Dissertations & Projects

Sealing of the root canal system is usually accomplished by the conservative endodontic approach. Cases where it is impossible to treat nonsurgically are usually treated surgically by an apicoectomy and retrofill. There is a lot of controversy in the literature over which retrofilling material is closest to ideal. Presently, the most popular materials seem to be Amalgam, Super EBA, and IRM. For this reason, these materials were chosen for this study to evaluate the leakage potential at two different time intervals to see if setting time of the material had any influence on the amount of leakage.

Seventy extracted single …

A Pilot Study On The Evaluation Of Short Term Effects Of Jasper Jumper Therapy, Eric D. Fraser

Loma Linda University Electronic Theses, Dissertations & Projects

Lateral cephalometric radiographs were obtained for ten patients treated with Jasper Jumper appliances from three locations. Pre and post-appliance measurements were compared to determine the cephalometric effects seen in this group of patients. All patients in this study exhibited mesofacial to brachyfacial growth patterns and were all of growing age. All patients were treated to Class I along the complete buccal segment. The results yielded the following conclusions: 1) the facial axis did not open and the lower face height did not increase significantly for this group of patients, 2) there is an intrusive effect delivered to the upper first …

A Shear Bondstrength Evaluation Of Five Orthodontic Light-Cured Adhesives, Perry M. Unruh

Loma Linda University Electronic Theses, Dissertations & Projects

In this study, the shear bondstrengths of five commercially available orthodontic light-cured adhesives were evaluated with respect to two types of curing lights and various cure-times. A total of 160 Transcend brackets (mechanical retention) were utilized. The brackets were individually bonded to knurled stainless steel testing rings via the respective adhesives. Each bracket was sheared from the testing ring using an Instron machine. For each adhesive a 2, 5, 10, and 20 second cure-time, and an immediate, 5 minute, 20 minute, and 24 hour shear test time was employed. The adhesives were cured using high intensity and low intensity visible …

Transforming Growth Factor-Beta 1 Expression In Developing Ovine Teeth As Visualized By In Situ Hybridization, Søren Jepsen

Loma Linda University Electronic Theses, Dissertations & Projects

Recently we demonstrated that human dentin contained relatively high amounts of transforming growth factor beta (TGF-ß) and proposed that dentin TGF-ß originated from odontoblasts. Because of the suggested role of TGF-ß in mediating cellular interactions in dental cell development by paracrine mechanisms, we studied the expression of TGF-ß message in developing teeth by in situ hybridization. 5 µm serial sections of neonatal sheep mandibular third molars that had been fixed in glutaraldehyde and paraffin-embedded were used for in situ analysis. An [³⁵S]-labeled cRNA probe, complementary to TGF-ß1 mRNA, was constructed from human TGF-ß1 cDNA. Northern analysis of total …

Force Systems From T-Loop Orthodontic Space Closure Springs: The Effects Of Asymmetric Placement And Angulation On The Alpha-Beta Moment Differential, Andrew J. Kuhlberg

SoDM Masters Theses

No abstract provided.

Commencement Program 1992, Loma Linda University

Commencement Programs

CONTENTS

2 | 1992 Events of Commencement

3 | Academic Procession

4 | The Speakers

8 | The Honorees

16 | The Zapara Awards

Order of Programs

• School of Medicine, 18
• School of Dentistry, 25
• Graduate School, 32
• School of Nursing, 40
• School of Public Health, 44
• School of Allied Health Professions, 51

Ability Of Cylindrical Root Form Implants To Withstand Controlled Lateral Forces, Silvio Emanuelli

Loma Linda University Electronic Theses, Dissertations & Projects

The ability of root form implants to withstand lateral forces has been investigated in animal model. Two new techniques for quantification of forces generated by a loading device have been developed and tested. The strain gages bonded to the loading device were calibrated either intraorally by a micro load cell, or in laboratory by Instrom Machine.

Preliminary results indicate that laterally applied continuous forces up to 6,000 grams do not elicit failure of root form implants.

An Evaluation Of Surface Enamel Damage Following The Debonding Of Ceramic Brackets : A Follow-Up Study, B. Scott Hood

Loma Linda University Electronic Theses, Dissertations & Projects

To evaluate surface enamel damage after debonding ceramic brackets using their manufacturer's recommended methods, sixty four bicuspid teeth were bonded with three different types of ceramic brackets and one type of metal bracket. All the brackets tested utilized mechanical retention only. The brackets were debonded in the mouth seven to ten days after bonding, extracted and evaluated with a scanning electron microscope. The study concluded that: 1) all brackets alter the surface enamel, 2) there is a significant difference in surface enamel damage between the metal bracket and the ceramic brackets utilizing a tensile debonding method, 3) there is no …

Predicting Post-Treatment Maxillary Lip Position : A Comparison Of Two Techniques, Kevin J. Andrews

Loma Linda University Electronic Theses, Dissertations & Projects

The objective of this study was to compare the "drape" technique as proposed by Economides with the Holdaway technique in predicting post-treatment maxillary lip position and to determine which method was more accurate. Pre and post-treatment lateral cephalograms were traced for ninety (Caucasian) cases equally divided by sex into three treatment groups: a) non-extraction with at least 4mm of upper incisor retraction, b) extraction of upper first bicuspids only, and c) extraction of all first bicuspids. VTO's were constructed as outlined by Economides (drape) and Holdaway for prediction of post-treatment maxillary lip position. The predicted lip positions were compared to …

New In Vivo And In Vitro Techniques For Quantification Of Lateral Force Levels That Cause Implants To Fail : A Progress Report On Monkey Research, V. Leroy Leggitt

Loma Linda University Electronic Theses, Dissertations & Projects

Two new techniques for quantification of forces generated by an expansion screw apparatus placed between pairs of cylindrical endosseous titanium implants are described, along with preliminary data gained from their use in Macaca rhesus monkeys. Strain gages were bonded to the expansion apparatus and were calibrated either directly by micro load cell, or indirectly by Instron Machine to reflect the applied force.

Immediate loads of up to 6 kilograms have been applied to the implants with no increase in mobility as verified by a Periotest device. No previous studies on the orthodontic uses of implants have evaluated in vivo forces …

Soft Tissue Changes Of The Upper Lip Following Isolated Le Fort I Osteotomies, Kendall E. James

Loma Linda University Electronic Theses, Dissertations & Projects

Pre-operative (T-1) and post-operative (T-3) radiographs were obtained and traced for fifty-one non-growing patients who had undergone isolated Le Fort I osteotomies. These tracings were then digitized with the results arranged in a data file and subjected to statistical analysis. The purpose of this study was to establish ratios for certain hard to soft tissue movements that could be used to aid the clinician in post-surgical soft tissue profile prediction. The results showed that even though a large sample was used, individual patient variability remained high particularly in the horizontal directions. Most ratios found in this study were consistent with …

Condylar Angulations As Related To Submental-Vertex Radiographs, Jady L. Chiakowsky

Loma Linda University Electronic Theses, Dissertations & Projects

Pretreatment submental-vertex radiographs were obtained for 637 adolescent patients (307 males, 330 females) who had presented themselves for orthodontic treatment. The purpose of this study was to: (1) determine the relationship between condylar angulations and depth of cut with the variables: age, sex, and race, and (2) establish normative values for the categories studied. The results indicated that no significant differences existed between the condylar angulations for the variables measured. However, significant differences did exist between the depth of cut for the variables measured and there was significant interaction between age and race with respect to the depth of cut. …

Ua66/4/2 Ceremony Of Capping & Pinning, Wku Dental Hygiene

WKU Archives Records

Program from capping & pinning ceremony.

Ada Code Of Ethics (May 1992), 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.

A Study On Water Purity Using Electrical Conductivity(ความบริสุทธิ์ของน้ำดื่มน้ำใช้), Prasert Songkittiguna, Kriwal Wattoom

Chulalongkorn University Dental Journal

A study on the electrical conductivity, pH and bacterial cultures, the water purity is determined. Results are shown that the rain water during 2534 B.E. is much more polluted than 2533 B.E. Interestingly, the acidity of the rain water is approximately the same as the distillated water obtained from the Department of Pharmacology, Faculty of Dentistry, Chulalongkorn University. However, the distilled water displays the lowest electrical conductivity; it was one- tenth of the standard value of pharmaceutical or laboratory water set by the British Pharmacopoeia. The highest electrical conductivity, among all water tested, was both the Bangkok tap water and …

The Influence Of Eating Habits As Related To Caries Status Of School Children(อิทธิพลของบริโภคนิสัยต่อสภาวะโรคฟันผุของเด็กวัยเรียน), Ravewan Panya-Ngarm, Yuttana Panya-Ngarm

Chulalongkorn University Dental Journal

The aim of this study was to investigate the influence of eating habits on dental caries status of school children from low socio-economic families. The study was carried out in 2 groups of the compulsory school children aged 9 and 12 years. Each group was comprised of 210, equal number of boys and girls, and normally distributed by accidental quota sampling. Caries status (DMFT) were examined by a dentist whereas the preceding 24 hour dietary consumption was interviewed by a nutritionist. The result showed that the average daily consumption of the nutrients of 9 and 12 year old group, boys …

Prevalence Of Interproximal Caries Of Maxillary Central Incisors In A Group Of Thai Patients(ความชุกของการเกิดฟันผุระหว่างฟันตัดกลางซี่บนในผู้ป่วยไทยกลุ่มหนึ่ง), Bhoranee Watchraphongse, Patcharin Supaprod, Pairat Dhiravarangkura

Chulalongkorn University Dental Journal

A study was made of the prevalence of interproximal caries of the mesial of the central incisors which are in the same environment, the incidence of the interproximal caries is generally assumed to be the same. However, this was not found so in every case. The research methodology involved collecting data from x-ray films of the central incisors of 947 subjects. These were 10 to 59-year-old patients at the Faculty of Dentistry, Chulalongkorn University during 1987-1989. The results showed that caries of the central incisors are mostly found in 20-29 year-old males and females. It was found that 75.08 percent …