Medicine and Health Sciences Commons^™

A Methodology For The Determination Of The Relationship Between Quantitative Occlusal Forces And The Masticatory Muscles, William Melvin Taskey

Loma Linda University Electronic Theses, Dissertations & Projects

[Abstract Not Included]

A Method To Determine Curved Surface Laminagraphic Width And Position In Panoral Radiography Utilizing The Panorex X-Ray Unit, Gary G. Morikone

Loma Linda University Electronic Theses, Dissertations & Projects

Although the Panorex X-ray unit has been in existence for almost a decade, no information is publicly available relative to the determination of its laminagraphic slice width or position.

In order to utilize the machine most effectively as a research tool, it seems imperative that this width and position be established.

For the purpose of establishing the spatial relationship within the exposure mechanism, the two eccentric rotational axes were first located. Utilizing a positioning device, ten panoral radiographs of a plastic working dummy with metallic implants were exposed at varying exposure readings. The resultant radiographs, revealing varying degrees of accuracy …

Using A Computer Model To Study The Force Distribution On The Root Of The Maxillary Central Incisor, E. Jan Davidian

Loma Linda University Electronic Theses, Dissertations & Projects

A computer model of a human maxillary central incisor was devised to predict the momentary center of rotation of a tooth when a force was applied to the crown. The root of a tooth was divided up into a series of small segments to simulate the resisting forces set up along the root by the periodontal fibers. Each segment was assumed to resist a force in proportion to its area.

To study a tooth in a state of static equilibrium, two conditions must be met. The vector sum of all the forces acting on the tooth must equal zero, and …

An Odontometric Study Of Five Contemporary Western United States Indian And Alaskan Eskimo Groups, John A. Matis

Loma Linda University Electronic Theses, Dissertations & Projects

The morphologic characteristics of the oral cavity in five contemporary Western Indian and Alaskan Eskimo groups have been investigated by the use of study models of the dental archs. The sample consisted of 216 individuals, including 44 Navajos, 43 Apaches, 40 Papagos, 42 Pimas and 47 Alaskan Eskimos.

The first purpose of the study was to determine the extent of investigator error. This was accomplished by remeasuring many morphologic traits of the dentition in 125 Indians which had previously been measured by different investigators using the same study models. It was found that investigator error can be significant, even in …

What Nursing Personnel Know About Identifying The Signs Of Increased Intracranial Pressure, Naomi Bullard

Loma Linda University Electronic Theses, Dissertations & Projects

This study was concerned with finding out how much nursing personnel know about identifying signs of increased intracranial pressure and what understanding they have regarding the importance of prompt reporting of these signs.

A statement was prepared describing what the registered nurse, the license vocational nurse and the nursing assistant should know. This was validated by a panel of experts.

A two part questionnaire was developed from this statement. Part I asked for an essay response regarding the definition, causes, signs and symptoms and the nurse responsibility in intracranial pressure. Part II presented situations to which best answers were to …

Mandibular And Alveolar Growth In Dog Following Infusion Of 5-Fluorouricil, Richard D. Pfeiffer

Loma Linda University Electronic Theses, Dissertations & Projects

The action of a chemotherapeutic agent as a tool in studying its effect upon a primary growth center, the mandibular condyle, was investigated. So far as can be ascertained, no studies have been reported where these growth sites have been eliminated or modified by the use of chemotherapeutic growth inhibitors.

Observation of mandibular and alveolar growth following the infusion into the left external carotid artery of a cancer chemotherapeutic agent, 5-Fluorouricil (Roach-Hoffman), was noted. Comparisons were made between the infused and the uninfused sides of the mandible observing gross growth changes.

Four dogs, aged 75 days, were infused with varying …

Biochemical Properties Of Salmonella Potsdam Bacteriophage P4/2, Clyde L. Roggenkamp

Loma Linda University Electronic Theses, Dissertations & Projects

Over 90% recovery of phage P4/2 was realized with differential centrifugation concentration and purification, whereas only about 16% was recovered from the aqueous two-phase polymer - Genetron - ECTEOLA-cellulose column system. Purity of preparations was greatest with the density gradient centrifugation (A₂₆₀ = 2.66 and A₂₈₀ = 1.80 per 10¹² plaque-forming units). With the chemical system of concentration and purification followed by an ECTEOLA anion exchange run, the A₂₆₀ was 6.6 and the A₂₈₀ was 4.3.

Three tests were employed to determine the configuration of P4/2 DNA: (1) a formalin denaturation test, (2) a thermal …

Survey Of Knowledge Of Fifty Registered Professional Nurses Regarding Selected Factors Of Indirect Blood Pressure Measurement, Audrey Gayle Krueger

Loma Linda University Electronic Theses, Dissertations & Projects

This study was concerned with determining the knowledge registered professional nurses had regarding selected factors that contributed to variations in the indirect measurement of blood pressure. It was thought that assessment of the nurses' knowledge could contribute to more effective nursing services by disclosing areas of weakness which could be strengthened by hospital in-service and nursing education. Literature was reviewed on the methods of measurement in current use, common errors encountered in indirect measures, and selected factors that influence blood pressure readings, i.e., cuff width, emotions and activities, obesity versus thinness, position of the subject, inflation and deflation of cuff …

Antibiotics And The Wasting Disease In Neonatally Thymectomized Rats, Douglas M. Grignon

Loma Linda University Electronic Theses, Dissertations & Projects

The administration of the antibiotic, Chloramphenicol, to pregnant rats just prior to, and for four days after delivery, diminishes the incidence of the so-called "Wasting Disease" in neonatally thymectomized rats.

A total of 50 rats were divided into the following groups:

1. Thymectomy only---nonmedicated 17 rats
2. Thymectomy only---medicated 12 rats
3. Thymectomy-adrenalectomy---nonmedicated 5 rats
4. Thymectomy-adrenalectomy---medicated 8 rats
5. Controls---nonmedicated 4 rats
6. Controls---medicated 4 rats

Chloramphenicol was administered in the drinking water to the mothers of groups 2, 4 and 6 for about 2 days prior to delivery and 4 days after. On the day of birth or within three days after birth, the …

A Study Of The Relationship Between Preoperative Anxiety And Postoperative Vomiting, Taye Grace Emori

Loma Linda University Electronic Theses, Dissertations & Projects

The identification of anxiety as a causative factor in post operative vomiting was the purpose of this study. It was hypothesized that the more anxiety a patient experienced before surgery, the greater would be his chances of vomiting immediately after surgery.

The establishment of an underlying basis and need for a study of the relationship of anxiety and postoperative vomiting were made through a review of literature. The factors which researchers believed were contributory to postoperative vomiting and the possible inclusion of anxiety as one of them were studied.

Three physiologic measures (systolic blood pressure, heart rate, and eosinophil count) …

Nurse Attendance Versus Use Of Analgesic Medication In The First Stage Of Labor, Jo Ann Soulé Henriksen

Loma Linda University Electronic Theses, Dissertations & Projects

To determine if the woman who receives the continuous attendance of a nurse during the first stage of labor requires less analgesic medication than the woman who is given interrupted or intermittent nursing care, a study was made employing the experimental method with the parallel-group technique. Thirteen patients meeting the criteria of the study who received continuous nursing attendance during the first stage of labor by the nurse researcher were closely matched to thirteen patients from a group of one hundred seventy-three, whose nursing care was given by the staff personnel. As an objective method of assessing support during labor …

A Comparison Of Axillary And Rectal Temperatures In Children, Doris Payne

Loma Linda University Electronic Theses, Dissertations & Projects

This study was conducted on seventy-five children, three to eight years of age. The purpose was to compare a three-minute axillary with a three-minute rectal temperature. Known factors which might influence the findings were eliminated. These were emotional stress, physical exercise, antipyretic medications, cooling and heating measures, gastro-intestinal disturbances, and croupettes or oxygen tents. The range of the difference between the temperatures was from 0.8 degrees to 2.2 degrees with the mean difference of 1.13 degrees. A little less than half of the temperatures had one degree of difference. An additional thirty-two per cent were within 0.2 degrees of being …

Development Of A Positioning Device For Use In Conjunction With Panoral Radiography, Ray M. Hymer

Loma Linda University Electronic Theses, Dissertations & Projects

A cephalometric positioning device has been developed for use on the XRM Panorex X-Ray machine. Tests have demonstrated that the variability in producing serial radiographs with this device is comparable to, or less than, that currently accepted in conventional radiographic cephalometry.

Two procedures for obtaining serial radiographs were employed. Two patients were used for the first procedure and three patients were used in the second procedure.

In the first procedure each patient was positioned in the device and two radiographs were taken in sequence without disturbing the patient.

In the second procedure three clinic patients were used as subjects and …

Root Surface Area Related To Anchorage In The Begg Technique, Donald Copeland Freeman

Theses and Dissertations (ETD)

Almost two hundred years ago Hunter recognized the necessity of extracting teeth to ’’procure room for the others which are to be brought into the arch.” He further noted that, ”To extract an irregular tooth would answer but little purpose if no alteration could be made in the situation of the rest.”¹

Extraction of selected teeth to gain room for the proper placement of the rest, and the subsequent procedures to utilize this space to the utmost advantage, have been integral parts of orthodontic treatment for many years.

Strang and Thompson² stated that the ability to manipulate any …

A Cephalometric Comparison Of The Chamula, Mayo And Navajo Indians, Norman C. Bunker

Loma Linda University Electronic Theses, Dissertations & Projects

Lateral head x-rays were obtained on selected samples of 24 Chamula, 29 Mayo and 39 Navajo Indians for cephalometric comparison.

Cephalometric evaluation was carried out by means of the Bjork analysis. Mean values for each of the Indian groups were determined and compared with each other and with the mean values of a group of Swedish conscripts studied by Bjork. The mean values were statistically analyzed and and subjected to the Student's "t" test to determine the significant levels of differences.

Results revealed that in comparing the three Indian groups significant differences do appear. They are few and general concordance …

Occlusal Patterns And Tooth Morphology In The Navajo Indians Of Monument Valley, Utah, Leroy C. Trnavsky

Loma Linda University Electronic Theses, Dissertations & Projects

The occlusal patterns and morphology of the dentition of the Navajo Indians were studied and compared to those of populations of known Mongoloid ancestry. Thirteen dento-anthropomorphic characteristics were studied from plaster casts obtained from fifty-four Navajo Indians from the Monument Valley area of Utah. The thirteen characteristics included were:

1. Degree of shovel-shape of the maxillary centrals and laterals.
2. Presence of a winged appearance in the maxillary centrals.
3. Mesiodistal crown diameters of the maxillary centrals and laterals.
4. Type of lingual tubercle on the maxillary centrals and laterals.
5. Cusp pattern of mandibular molars.
6. Cusp pattern of maxillary molars.
7. Frequency of cusp of …

Patients With Transistor Pacemakers : Their Problems In Adjusting To Daily Living, Miriam L. Moore

Loma Linda University Electronic Theses, Dissertations & Projects

It was the purpose of this study to gain greater insights into the problems and needs of patients with artificial pacemakers. The problem was to find out in what ways the pacemaker affected the patients' manner of living and what problems they had had in adjusting to a new way of life.

The method of the study was the descriptive survey; an interview guide was the tool. Seven patients who had been electronically paced for periods of four weeks to two and one half years were interviewed in their homes. The ages of the three men and four women ranged …

Electromyographic Analysis Of The Temporal And Masseter Muscles During The Para-Retentional Period In Orthodontic Patients, Thomas L. Thompson

Loma Linda University Electronic Theses, Dissertations & Projects

This study was initiated to compare electromyographically the activity of the masseter and temporal muscles during the early retentional period in orthodontic patients. Electromyographic recordings were taken at the following times: (1) before typical edgewise appliance was removed, (2) at time of retainer insertion, (3) after eight to twelve weeks of retainer wearing, and (4) one day following occlusal equilibration. Electromyograms from the orthodontic group of subjects were compared with electromyograms from a group of subjects with normal occlusion, and a group of subjects with untreated Class II, Division 1 malocclusions. There was a total of thirteen subjects studied: five …

A Study Of The Pattern Of Malocclusion Of The Lower Anterior Teeth In Subjects With Malocclusion And No History Of Orthodontic Treatment, Richard A. Simms

Loma Linda University Electronic Theses, Dissertations & Projects

A study of the pattern of malocclusion of the six lower permanent anterior teeth in subjects with malocclusion and no history of orthodontic treatment was undertaken to determine if the malocclusion of these teeth occurred in a random manner or followed a definite regular pattern.

The problem was approached epidemiologically by studying the positions assumed by the teeth in 408 males and females age 12 to 23. The subjects of this investigation were enrolled as students in the grammar school, academy, college and university system of the Pacific Union Conference of Seventh-day Adventists.

The method of visual assessment of malocclusion …

Effects Of Loading Various Wire Configurations Under Simulated Cuspid Retraction Conditions, Carl James Heinrich

Loma Linda University Electronic Theses, Dissertations & Projects

The magnitude, and manner of application of forces effects the whole complex picture of tooth movement. Proper mechanical management in terms of the individual tooth as well as the entire arch, must be kept in mind. When applying forces for producing individual tooth movement as desired in cuspid retraction, we must consider the nature of the biological resistance in terms of the force distribution in the periodontal membrane as well as the force magnitudes necessary for efficient tissue response.

Since the alteration of wire configuration offers the greatest potential in changing the physical properties of a unit of wire, the …

A Comparative Study Of Two Contemporary Methods Of Cephalometric Analysis, Alden B. Chase

Loma Linda University Electronic Theses, Dissertations & Projects

A comparative cephalometric study was made of nineteen cases, fourteen of which were patients under treatment at the Department of Orthodontics, School of Dentistry, Loma Linda University. The remainder were individuals considered to have normal occlusions.

The review of the literature emphasized the plethora of analyses and the fact that cephalometry is a tool that must be mastered if the orthodontist is to give the best service. Thus the need for a study to compare the methods of analyzing the cephalograph. A study was made to compare two main methods of analysis and to determine whether or not the information …

Effect Of 9 Α-Fluorohydrocortisone Acetate On Gastric And Salivary Electrolytes Of Normal Fasting Subjects, Ardis Stern Beckner

Loma Linda University Electronic Theses, Dissertations & Projects

The effect of 9α-FF on the Na:K ratio, chloride, and pH of saliva and gastric secretions, and on the total and free acid of gastric juice in normal human subjects was investigated. This study was designed to investigate whether conditions could be produced in the normal human subject similar to those present in patients with primary aldosteronism by using large doses of 9α-FF. August and others found a change in salivary electrolytes when cortisone, desoxycortisone, or ACTH were given to normal subjects. In these cases as in primary aldosteronism there was a decreased Na:K ratio and potassium excretion, with sodium …

Effects Of Alternate Hot-And-Cold Treatment Following Hysterectomy, Teresa Eileen Holland

Loma Linda University Electronic Theses, Dissertations & Projects

This study was conducted to find out if the giving of alternate hot-and-cold treatments to the chest following abdominal hysterectomy would result in measurable benefits in improved patient comfort and rate of recovery. The White Memorial Hospital was selected as the control area and the Loma Linda Sanitarium and Hospital was selected as the experimental area.

Literature was reviewed to determine the value of wet heat and cold on the circulatory and respiratory system and whether or not their effects would be useful postoperatively.

Studies were further searched to find individual differences in the perception of pain. The influence of …

Accuracy Of The Indirect Method Evaluated By Mercury Micromeasurement, Estol C. Pruett

Loma Linda University Electronic Theses, Dissertations & Projects

Although the indirect method for preparing dental castings has been in use for over forty-five years, very little information has appeared in dental literature relative to its accuracy. The development of a precise and quantitative method for determining the adaptation of wax patterns or castings was necessary before such an evaluation could be considered valid. It was felt the Mercury Micromeasurement test, devised in 1958 by Hollenback, should meet these requirements. A description of the test had been published. However, at the time the project was begun, no data had appeared in the literature.

In order to establish a standard …

A Study Of The Bacteriological Effectiveness Of Oral Thermometer Procedures In Three Selected Hospitals, Esther Mae Rose

Loma Linda University Electronic Theses, Dissertations & Projects

Because pathogens such as streptococcus and staphylococcus have been transferred in many hospitals, the source of the infections is of concern to doctors, nurses, and other medical personnel. As shown by the review of literature, good techniques are necessary to stop the spread of disease.

It was the purpose of this study to investigate one facet of patient safety by: (1) the culture of thermometers ready for use in three selected hospitals; (2) to determine the effectiveness of the Group, Individual, and Central Supply methods of disinfection currently practiced in the three selected hospitals.

The method for the experiment of …

Electroencephalography In A Teaching Hospital, Guy M. Hunt Jr.

Loma Linda University Electronic Theses, Dissertations & Projects

Electroencephalography may be defined as a study of the electrical activity of the brain. This activity was first recorded and reported by Caton in 1875. However, it was the work of Hans Berger, confirmed by Adrian and Matthews in 1935, which opened the way for the rapid advancement of knowledge in this field. The arrival of the age of electronics made possible development of the sensitive, accurate, and dependable amplifiers available in modern electroencephalography, which has in turn made possible the rapid advancements in this field. Techniques have been perfected and standardized, personnel have been trained, and laboratories have been …

Surgery For Benign Biliary Tract Disease : An Analysis Of 310 Cases From Smaller Hospitals, Theodore E. Wade

Loma Linda University Electronic Theses, Dissertations & Projects

[Abstract Not Included]

Summary:

The results of biliary tract surgery in three small general hospitals serving suburban communities was studied. Their average daily censuses were 38, 70, and 97. Fourteen (4.5%) of 310 cases of benign biliary tract disease died after surgery. Among 219 cases of elective cholecystectomy, four patients (l.8%) died. The mortality in 1196 cases reported from small hospitals by this, and three other authors, was 3.3%. This is slightly higher than the mean mortality, 2.4% among 25 reports of surgical mortality for gall stone disease found in the literature. The maximum number of cases came to surgery …