Medicine and Health Sciences Commons^™

Evaluation Of Headgear Safety : A Comparative Study, William J. Pritchard

Loma Linda University Electronic Theses, Dissertations & Projects

The purpose of this study was to determine the relative safety of headgear safety straps. Samples from five different safety headgear straps simulated orthopedic and orthodontic use and data were collected from a series of pulls on an Instron machine. The straps were compared by the distance the face bow traveled before the safety mechanism released, the force built into the face bow at safety release and the force required to remove the inner bow out of the molar tube. The conclusions are as follows: (1) the distance a face bow can travel from the molar tube and still be …

The Long Term Stability Of The Dental Arches Following Rapid Palatal Expansion, Robert C. Stockdale

Loma Linda University Electronic Theses, Dissertations & Projects

The rapid palatal expander is an appliance which has been used to laterally expand the maxillary dental arch, with subsequent mandibular dental arch expansion.

The purpose of this study was to evaluate and quantify long term post treatment changes in the length and width of both dental arches following rapid palatal expansion.

Plaster models from eleven patients treated with rapid palatal expansion were obtained seven or more years after treatment. The dental arches were intact anterior to the first molars and no retreatment had taken place.

Maxillary and mandibular canine, premolar and molar arch width, arch length, arch circumference, and …

A Modified Nance Unilateral Molar Distalizer, Tracy J. Reiner

Loma Linda University Electronic Theses, Dissertations & Projects

This clinical study evaluated a modified Nance appliance designed by the author to distalize molars unilaterally for Class II correction. This fixed appliance did not rely upon extraoral traction or intraoral elastics. Twelve unilateral Class II patients aged 13 to 17 were treated nonextraction with the appliance. Pretreatment and posttreatment photographs were taken of the palatal soft tissue and did not reveal any untoward changes as a result of the Nance acrylic button. All molars were corrected to an Angle's Class I relationship. Molar correction was evaluated visually and molar distalization was measured using an acrylic jig fitted to the …

Update - May 1990, Loma Linda University Center For Christian Bioethics

Update

In this issue:

-- James Walters wins NEH Grant
-- Fraud in Modern Medicine
-- Roy Branson serves as guest professor of medical ethics
-- Cambridge publishes Michael Pearson's study of Adventist ethics

[ RU486: Blessing or Curse? ]
-- Medical Aspects of RU486
-- The Curse of RU486: The Death Pill
-- RU486: A Very Mixed Blessing

-- Robert Wirth sparks aging project

Update - December 1989, Loma Linda University Center For Christian Bioethics

Update

In this issue:

-- Australia's Herbert Clifford will lecture at Loma Linda on February 24
-- Claremont Conference endorses "The Right to Choose Death"
-- Michael and Helen Pearson arrive from England
-- Contributors receive monthly audio cassettes

[ Nancy Cruzan and the Courts ]
-- The Persistent Vegetative State
-- Nancy Cruzan is Already Dead
-- Nancy Cruzan is Not a Vegetable
-- My Family's Anguish

-- The Right to Choose Death

Feasibility Of An Extraoral Method For Predicting Manibular Incisor Relapse, Mark J. Saylor

Loma Linda University Electronic Theses, Dissertations & Projects

The author undertook to develop an extraoral model for predicting mandibular incisor relapse similar to the model described by Harvey and Sheldon Peck. Whereas the Peck and Peck method involves intraoral measurements, the method described in this paper relied on the taking of measurements from the patient's pre-treatment plaster models. Two hundred and sixty teeth were measured both orally and on plaster casts, and several statistical tests were performed to isolate any differences between the intraoral and extraoral methods. The principal difference was identified as the faciolingual measurement of the incisor, due to the height of contour often being subgingival …

Update - June 1989, Loma Linda University Center For Christian Bioethics

Update

In this issue:

-- Etienne-Emile Baulieu discusses RU486
-- Walters edits War No More?

[ Abortion: Ethical Issues ]
-- Excerpts of papers presented at the "Abortion: Ethical Issues and Options" international conference

-- Elder, Guy, Provonsha and Winslow assess AIDS at A.P.C.

Chromatographic And Mass Spectrometric Analysis Of Bradykinin Related Arginyl Peptides And Other Studies, Kevin Dale Ballard

MUSC Theses and Dissertations

Dimethylpyrimidylornithyl-N-trifluoroethyl-O-TBDMS (DMPO-N-TFE-O-TBDMS) polyaminoalcohol derivatives of arginyl peptides were evaluated for their utility in peptide analysis by capillary gas chromatography-mass spectrometry (GC-MS). These derivatives were hydrolytically stable and sufficiently volatile for capillary GC-MS analysis of low nanomole amounts of peptides as large as RPPGF. Complete amino acid sequence information was generated under electron impact ionization conditions, including several ions diagnostic for arginine residues, with molecular weight information imparted by the [M-15]+ and [M-57]+ pair of ions characteristic of TBDMS derivatives. Analysis of the sequential intermediate derivatives by FAB-MS facilitated optimization of problematic derivatization steps. As little as 20 picomoles of peptide …

Update - November 1987, Loma Linda University Center For Christian Bioethics

Update

In this issue:

-- Gerald Winslow joins LLU faculty
-- Thompson library opens September 25

[ Anencephalic Infants as Organ Donors: Ethical Issues ]
-- A Neonatologist's Concern
-- A Neonatologist's Reply
-- Should the Law be Changed?
-- Would Anencephalic Neonates be Citizens?
-- Cadaveric Donors Should be Dead

-- Ethics Center seeks $100,000

A Study Of The Relationship Between Incisor Intrusion And Root Resorption, W. Michael Mcfadden

Loma Linda University Electronic Theses, Dissertations & Projects

This study examined the relationship between maxillary and mandibular incisor intrusion and root resorption. Age, sex, facial type, treatment time, extraction versus non-extraction therapy, width of the symphysis, and the angle of the incisors to skeletal reference planes were also studied for their relationship to intrusion and root resorption. Thirty-eight cases treated with utility arches for intrusion were selected. Root shortening was found to average 1.84 mm for maxillary incisors and 0.61 mm for mandibular incisors. Intrusion of incisors in a population that exhibited growth was found to be one of "holding against growth". No relationship was found to exist …

A Non-Human Primate Model For Studying Corticotomy-Facilitated Orthodontic Tooth Movement, R. David Rynearson

Loma Linda University Electronic Theses, Dissertations & Projects

This study was undertaken to test the hypothesis that a corticotomised tooth moves as a tooth-bone unit when under orthodontic force. A non-human primate model was designed to test the hypothesis. The non-human primate selected was Macaca fasicularis. Three adult males with erupted third molars were chosen so that extrapolation could be made to the adult human. The methods employed included the following: 1) Each animal had one treatment quadrant and one control quadrant per arch; 2) Pre-op and post-op study models were made; 3) All 2nd premolars, 2nd molars, and 3rd molars were banded; 4) A full-thickness flap …

Update - July 1986, Loma Linda University Center For Christian Bioethics

Update

In this issue:

-- Baby Jessie and Beyond
-- Newsbriefs
-- The Bouvia Decision: Right But Inadequate
-- LLU plans conference on ethics and transplantation

[ Apartheid and Morality Today ]
-- Growing Up White in South Africa
-- In Favor of Constructive Engagement
-- Divestment: Realistic Moral Opposition to Apartheid

-- What should treatment committees consider?
-- Religion and Politics on Sabbath (Editorial)
-- George Otto Schumacher, MD (1913-1986)
-- Thomas Gordon Goman, PhD (1944-1986)

Factors That Influence Prepared Childbirth Couples' Use Of Epidural Anesthesia For Labor And Delivery, Terri S. Chambers

Community & Environmental Health Theses & Dissertations

The purpose of this study was to identify factors that influence a Prepared Childbirth couple's decision to utilize epidural anesthesia for labor and delivery. Review of the literature indicated a high correlation between epidural use for uncomplicated labors and deliveries and a high incidence of maternal complications and low neonatal neurological and behavioral scores.

A sample of twenty-nine couples was used in this prospective, non-experimental field study for the research. Data were collected utilizing two developed demographic and factual event tools, Rotter's Internal-External Locus of Control Tool and Spanier's Dyadic Marital Adjustment Tool.

Three hypotheses were developed and data were …

Update - March 1986, Loma Linda University Center For Christian Bioethics

Update

In this issue:

-- Endowment effort succeeds!
-- In honor of my father
-- Are Apartheid and Nuclear War Biotheical Issues? (Editorial)

[ ABORTION: Understanding Our Differences ]
-- Excerpts from a husband and wife 'debate' regarding abortion

-- The Ethics of Biomedical Ethicists (Critique)

A Rapid Concentration And Identification Technique For Human Malaria Infections Using A Mouse Model, Donald D. Barton

Loma Linda University Electronic Theses, Dissertations & Projects

Red blood cells infected with malaria parasites experience a change in density making them lighter (less dense). This paper reports a new, rapid diagnostic technique using this change in density in the infected red blood cell. It is not only easy to use, but it is also compatible with the technological conditions found where the malaria problem is most acute - in many developing countries of the world. A small sample of blood drawn from a simple finger stick can be concentrated and examined microscopically for malaria parasites within 10 minutes. The thick film slide preparation, presently used, takes a …

A Sensitivity Analysis Of The Coefficients For The Transformation Of The Electrocardiographic Orthogonal Three-Lead System (Frank) To The Standard Twelve-Lead System, Rasa Ona Draugelis

Loma Linda University Electronic Theses, Dissertations & Projects

The SENSITIVITY ANALYSIS is performed on the transformation coefficients of the Frank XYZ signals generating standard 12-lead ECG with respect to diagnosis. The analysis is adapted for the individual waveform and per each lead. The disease/abnormality categories are described in terms of discrete pattern classes based on criteria used by Marquette Electronics, Inc. The nonlinear global sensitivity analysis method developed by Shuler, et al, is selected for this project. The diagnostic change in the waveform is denoted by a distance measurement from the pattern class boundary corresponding to the best-experimental coefficient estimates (Dower coefficients) to the alternate coefficient specification measurement …

Predictive Value Of Radiographic Analysis Of Menton, Hyoid Bone, And The Third Cervical Vertebra Angle, Kalfred G.S. Chun

Loma Linda University Electronic Theses, Dissertations & Projects

The purpose of this study is to determine if the hyoid bone could be used as a reliable and stable reference landmark. Previous researchers have used cranial landmarks to determine the hyoid bone position. The results of these studies have shown a large variability in hyoid position. To determine the hyoid bone position, an analysis called the hyoid triangle was used. The hyoid triangle is formed by joining the cephalometric points retrognathion (the most inferior posterior point on the mandibular symphysis), hyoidale (the most superior anterior point on the body of the hyoid bone), and C3 (the most anterior inferior …

Update - Spring 1985, Loma Linda University Center For Christian Bioethics

Update

In this issue:

-- 250 Attend first national ethics conference
-- Capron to discuss "The High Cost of Dying"
-- Our twofold potential (Editorial)
-- Letter to the Editor

[ Reflections Regarding Organ Transplantation ]
-- Excepts from "Ethical Challenges of Organ Transplantation" public lecture

--Do cancer patients expect too much?

The Incidence Of Postoperative Retching And Vomiting In The Adult Patient Undergoing Abdominal Surgery Following Intraoperative Administration Of Droperidol, Gary L. Miller

Theses and Dissertations

The complication of postoperative nausea and vomiting is still one of the most common today. The potential for secondary complications associated with retching and vomiting such as aspiration pneumonitis strain of suture line with possible hemorrhage, and potential fluid and electrolyte imbalance makes prevention of retching and vomiting a primary concern in the management of the postoperative patient.

The use of antiemetic drugs to prevent or control postoperative nausea and vomiting is a long-standing practice. Droperidol, an antiemetic, routinely used since being introduced in 1963, has been found to be successful in treating postoperative nausea and vomiting. This study examines …

Update - Fall 1984, Loma Linda University Center For Christian Bioethics

Update

In this issue:

-- Robert Veatch to lecture in January at Loma Linda
-- Bioethics conference slated for April
-- Charles Teel Jr. will lead Central America probe

[ Reflections Regarding Baby Fae ]
-- Ethical Issues Evoked by Baby Fae
-- The Best Available Therapy
-- The Morality of Experimenting Upon Children

-- Who Should Live When All Can? (Review)
-- Ruffcorn pledges yearly $10,000
-- Cafferky's provide $100,000
-- Ethics center seeks $500,000

A Comparison Of Enamel Detachments After Debonding Between Unitek's "Dynalok" Bracket And A Foil-Mesh Bracket: A Scanning Electron Microscope Study, Robert E. Meister

Loma Linda University Electronic Theses, Dissertations & Projects

The intent of this paper was to: 1. Evaluate the mode of adhesive failure when debonding both flexible and rigid base orthodontic brackets. 2. Evaluate the bracket bases for enamel detachments. 3. Measure the enamel detachments.

After preforming shear test on flexible and rigid base orthodontic brackets mounted to extracted human teeth it was determined that failure occurred at the enamel/adhesive interface 30% of the time, at the bracket/adhesive interface 10% of the time and a combination of these 60% of the time for both groups.

Five brackets from each group were evaluated for enamel detachments using energy dispersive x-ray …

Group Comparability: A Multiattribute Utility Measurement Approach To The Use Of Random Assignment With Small Numbers Of Aggregated Units, C. Anderson Johnson, John W. Graham, Brian R. Flay, William B. Hansen, Linda M. Collins

CGU Faculty Publications and Research

It is not always possible, especially in large-scale evaluation research, to ensure that random assignment will produce groups that are comparable on any number of potentially important factors. Typically, gaining comparability has been achieved only at the expense of random assignment. A method is presented that allows multivariate comparability while making only minimal restrictions on randomization. The procedure is demonstrated in the context of assigning 63 aggregated units (schools) to 28 experimental and control conditions. Good comparability of groups for all primary main effects and interactions was verified for 15 individual variables.

The Bender Gestalt And Symbol Digit Modalities Tests As Cerebral Dysfunction Screening Instruments :A Comparative Evaluation, Bruce R. Wright

Dissertations

Problem

One of the problems confronting the psychologist in an institutional setting is the selection of appropriate instruments for the screening and diagnosis of a variety of psychological problems. Among the more subtle and yet far-reaching problems of this sort are those associated with disease, trauma, or congenital defect of the central nervous system. It was the purpose of this study to evaluate the usefulness of two well-known psychological tests as screening instruments for neurological dysfunction in a large and varied institutional population.

Method

The Bender Visual-Motor Gestalt Test (BGT) and Symbol Digit Modalities Test (SDMT) were administered to one …

Mandibular Repositioning With Frankel Appliance Therapy, Clark E. Schneekluth

Loma Linda University Electronic Theses, Dissertations & Projects

A sample of twelve Frankel appliance (FR-2) treated patients, in the mixed dentition stage, were selectively chosen by an orthodontist based on the Class II correction and evaluated from before treatment and end of treatment laminagraphic and lateral cephalometric radiographs. The average treatment period was 22 months (1 yr. 10 mos.). The average pre-treatment age was 9.5 years with a range from 8 to 11 years old, while the average post-treatment age was 11.3 years with a range of 10 to 13 years.

Frankel appliance therapy was the only form of mechanics used in this study.

The before treatment lateral …

A Comparison Of Two Rapid Palatal Expansion Appliances And Their Effect On Palatal Cross-Sectional Area, William D. Scott

Loma Linda University Electronic Theses, Dissertations & Projects

Two rapid palatal expansion appliances, acrylic-free and acrylic-reinforced, were compared for their effect on the cross-sectional area of the palate. Two groups, twenty-five patients in each, were selected so that they would match as closely as possible with regards to age and sex distribution. The pre-treatment and post-treatment maxillary models were duplicated, and this duplicate model was then trimmed in a specific manner to allow the cross-sectional area between the first permanent molars to be compared. The results indicate that there is no difference, at the five percent level of significance, between these two appliances. It is concluded that the …

Investigation Of Blood Pressure Measurement Using A Hydraulic Occlusive Cuff, Kusha R. Bhattarai

Dissertations and Theses

This thesis presents an improved oscillotonometric system for the measurement of human blood pressure. The study included:

1. The design of a hydraulic occlusive cuff,

2. The investigation of the wave forms taken from the blood pressure measurements, and

3. The design of a mechanism for the simulation of human blood pressure pulse.

In this study, an experimental system consisting of a rigid shell occlusive cuff, a constant volume displacement pump, a transducer, and a chart recorder was designed and used for data collection.

A Correlation Study Of Facial Soft Tissue Proportions (Golden Sections) And Cephalometric Measurements Of Golden Sections And The Eleven Factor Analysis, Russell Andrew Sutliff

Loma Linda University Electronic Theses, Dissertations & Projects

Frontal photographs on a total of one hundred and three individuals who had been treated by Dr. Ricketts, and had been involved in a prior study at Rocky Mountain Data Systems, were evaluated for facial proportions according to Ricketts application of Pythagoras' golden section. Seven facial proportions were analyzed from 1:1 retention phase frontal photographs. Forty individuals, made up of twenty-two females and eighteen males, 12.2 to 21.0 years of age, were selected and divided into two groups of twenty each, according to their soft tissue facial proportions. A range of acceptability for the facial proportions was derived. Proportions within …

The Effects Of Second Molar Extractions In Conjunction With Bionator Treatment, Mohammed Toufic Jeiroudi

Loma Linda University Electronic Theses, Dissertations & Projects

The intent of this paper is to evaluate the effects of second molar extractions in conjunction with Bionator treatments. Eighteen Orthodontic patients were used in this study. All had had second molars extracted. Lateral cephalometric radiographs were traced and used to evaluate the treatment. The average age at time of extraction was 13 years, 3 months. The average treatment time was 38.3 months.

There were some orthopedic changes. The convexity decreased significantly, the condyle axis increased more than expected in normal growth. Also, the lower facial height and facial axis both became more dolichotype (open).

The upper and lower incisors …

Force Loss In Retraction Springs At 37°C As Affected By Time, Roger Edward Clawson

Loma Linda University Electronic Theses, Dissertations & Projects

Closed helix retraction springs fabricated from .016 X .016 inch Blue Elgiloy, Permachrome Standard stain less steel, and Multiphase orthodontic wire were tested at 37°C in their heat and nonheat treated condition to determine force relaxation properties. Electronic equipment consisting of load cells, regulated power supply, and an automatic recording device were used to measure force changes which occurred in the wire samples over a seven day period. A constant temperature was maintained by an ethylene glycol and water circulator. A temperature probe and an electronic thermometer monitored the 37°C water bath surrounding the wire samples. The data was graphed …

J.T.: A Case Of Mitral Valve Prolapse, F. Matthew Mihelic

Faculty Publications

No abstract provided.