Medicine and Health Sciences Commons^™

An Anthropometric Study Of The Face And Dentition Of The Papago Indian At The Stewart Indian School, Carson City, Nevada, Stephen J. Christensen

Loma Linda University Electronic Theses, Dissertations & Projects

The dentition and craniofacial complex of the Papago Indian was studied and compared to other groups. Casts of plaster and lateral cephalometric roentgenograms were obtained from 31 Papago Indians who were from southwestern Arizona and were attending high school at the Stewart Indian Boarding School, Carson City, Nevada. The individuals were between the ages of 13 and 20 years and had normal jaw relationships with no contiguous missing teeth. Data was obtained for the following variables from an oral examination, dental casts and tracings of the roentgenograms:

1. Degree of shovel shape of the maxillary centrals.
2. Frequency of cusp of Carabelli. …

An Organ Culture Technique For Maintaining The Pulp Tissue Of Intact Human Teeth, John P. Devincenzo

Loma Linda University Electronic Theses, Dissertations & Projects

The size of explants in organ culture is limited by their ability to feed, respire, and excrete by diffusion. The perfusion procedure described in this report is not limited to a particular explant size. The test tissue was the adult human tooth.

In order to maintain the pulp tissue of the intact human tooth in organ culture, special precautions were taken to prevent internal necrosis and to allow diffusion of nutrients and waste products. Using aseptic technique, a standard tissue culture medium plus appropriate antibiotics were delivered to a glass manifold housed in an incubator with an atmosphere at 100% …

Documentation Of Tooth Movement Utilizing Panoral Radiography, Robert M. Hauck

Loma Linda University Electronic Theses, Dissertations & Projects

Tooth movement has been documented utilizing the panoral radiograph. A positioning device, attached to the XRM Panorex X-Ray machine, was the means of patient orientation for the necessary radiographs required during the course of this investigation.

A group of ten beginning orthodontic patients, each requiring cuspid retraction, was chosen for evaluation of tooth position. Three contemporary retraction devices were employed during the course of this study. Tooth position was documented by use of panoral radiography during the retraction of these teeth.

The panoral radiographs were taken at monthly intervals over a period of eleven months for each patient. Composite tracings …

An Anthropometric Study Of The Face And Dentition Of The Pima Indian Population At The Stewart Indian School, Carson City, Nevada, Wilmonte Lee Penner

Loma Linda University Electronic Theses, Dissertations & Projects

Study casts and cephalograms were obtained on 18 female and 21 male Pima Indian students from the Stewart Indian Boarding School, Carson City, Nevada. Dentitional characteristics were assessed both clinically and by study casts. Cranio-facial analyses were performed by utilizing the skeletal and denture pattern variables suggested by the Downs and Riedel cephalometric analyses.

The purpose of this study was two-fold: (1) to determine the extent to which the Pima conforms to the Mongoloid master pattern, and (2) to test whether or not significant differences exist between the Pima and other Mongoloid groups which would allow discrimination.

The results of …

A Procedure For The Measurement Of Glosso-Maxillary Forces, Howard L. Lilly Jr.

Loma Linda University Electronic Theses, Dissertations & Projects

The purpose of this investigation was to develop a clinically feasible procedure for recording the magnitudes of glosso-maxillary forces at four palatal loci using an electronic transducer system described by Lear et, al. (1965). Of particular interest was the development of a convenient and accurate calibration device for both intraoral and extraoral application. A further object of interest was the effect an acrylic carrier plate might introduce to the magnitude of force response. Finally whether or not any significant adaptation to the carrier plate or to the transducers occurs during a reasonable testing period (six to seven hours).

A calibration …

An Anthropometric Study Of The Face And Dentition Of The Apache Indian Population At The Stewart Indian School, Garold D. Becker

Loma Linda University Electronic Theses, Dissertations & Projects

Cephalometric and dental morphology records were obtained from forty-three contemporary Apache Indian subjects (living at the Stewart Boarding School for Indians, Carson City, Nevada) to study the cranial, facial, skeletal and dentitional patterns and compare discriminately to other contemporary North American Indian groups: Pima, Papago, Mayo and Chamula. Materials on other Indian tribes considered were obtained from studies completed at Loma Linda University. The data obtained from dental morphology analysis of the Apache Indian subjects was com pared to the Mongoloid Master Pattern (1-4) as described by Moorrees (1957).

The contemporary Apache Indian conformed to the Mongoloid Master Pattern for …

An Analysis Of Orthodontic Treatment Results, William S. Asano

Loma Linda University Electronic Theses, Dissertations & Projects

A study of orthodontic treatment results was made on forty patients treated by the graduate students Loma Linda University. The purpose of the study was to determine the treatment changes in patients treated in the graduate clinic. The study was based on the findings of the cephalometric and full mouth radiographs. The distribution of the malocclusions were similar to those found in other studies. The group of forty patients was divided for paired comparisons of type of malocclusion, length of treatment, and extraction of teeth. Statistical correlations were computed on every change investigated in this study.

The Steiner Analysis 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 …

Mayo Dental Morphology, Val K. Artress

Loma Linda University Electronic Theses, Dissertations & Projects

The Mayo Indian of Sonora, Mexico, was selected for a study of dental morphology. The objectives of the investigation were to determine the extent to which the Mayo conformed to the four criteria of the Mongoloid dental master pattern, and to compare eight other specific tooth morphologic characteristics with like studies on Mongoloid and non-Mongoloid peoples. Plaster casts were made on a sample of forty-one Mayos.

The results of the study indicate that Mayos exhibit a 46 percent frequency of shovel-shape maxillary incisors, classifying "moderate shovel" and "shovel" together. The maxillary central-lateral width difference of 1.5 mm is small compared …

The Piezoelectric Effect Of Bone In Vitro, Lloyd E. Gauntt

Loma Linda University Electronic Theses, Dissertations & Projects

The mechanism of bone deposition and resorption, under stress, is incompletely understood. The direct piezoelectric properties of bone have been suggested as playing an active role in the internal morphology of bone tissue.

This study was designed to fabricate an apparatus and develop a technique to measure, quantitatively, the direct piezoelectric effect of the crystallites of bone.

In vitro studies were done with bone samples taken from bovine femur. The samples were subjected to stress loading and were observed to exhibit a pressure-induced electrical phenomenon. The amplitude of the potentials generated was dependent upon the magnitude of the bony deformation. …

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 …

Mandibular Resting Posture : An Electromyographic Evaluation, Carroll L. Bright

Loma Linda University Electronic Theses, Dissertations & Projects

Mandibular resting posture is the positional expression of cranial-facial morphology and the myotatic reflex of its contiguous musculature.

Alteration of sensory input to the main sensory, mesencephalic and motor nucleus of the Fifth nerve in a myotalic reflex system, theoretically should result in changes or alteration in motor response.

The purpose of this study was then to examine post interference phenomena as noted by amplitude variations within muscles during centric occlusion and cyclic chewing and to block its expression via mandibular nerve anesthesia.

A Faraday cage was utilized to completely enclose the experimental subject and a 5P5 polygraph was used …

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 …

The Facial Complex Of The Mayo Indian: A Radiographic Cephalometric Study, David G. Webster

Loma Linda University Electronic Theses, Dissertations & Projects

In order to investigate the characteristics of the facial complex of the Mayo Indian and to make comparisons between the facial complex of the Mayo Indian and the facial complex observed in other ethnic groups, measures of facial angles and linear relationships were obtained from a group of Mayo Indians in the state of Sonora, Mexico.

A simple of thirty subjects, seventeen boys and thirteen girls, with a mean age of 18.3 years was selected for this study. The criteria for selection was based on the integrity of the dental arches, occlusion and tooth morphology. Plaster casts and cephalometric x-rays …

Cytogenesis In The Regeneration Of Striated Muscles, Carlos S. Anguizola

Master's Theses

No abstract provided.

A Qualitative Study Of The Biophysics Of Tooth Movement By Means Of A Three-Dimensional Analog, Edgar Francis Geigel

Master's Theses

No abstract provided.

The Physiological Aspects Of The Piezoelectric Phenomenon And Its Application In Biologic Bone, Virgil V. Heinrich

Loma Linda University Electronic Theses, Dissertations & Projects

The relationship between stress and bony architecture has long been recognized, but the actual cellular machanism which causes the alteration is still somewhat vague. Piezoelectric properties and bioelectric potentials have been proposed as partial answers.

It is the purpose of this investigation to better understand and correlate the relationship of electric potentials or bioelectric potentials to the formation and transformation of physiologic bone.

It is very likely that the crystallites of bone possess the physical properties that would allow them to exhibit the piezoelectric phenomenon.

In the technique of this work a direct current and a pulsating current across the …

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 …

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 …

Masseter And Temporal Muscle Adaptability To Interproximal Contact Disruption : An Electromyographic Study, Robert E. French

Loma Linda University Electronic Theses, Dissertations & Projects

In this study an attempt was made to determine the amount of interproximal contact disruption necessary to initiate an electromyographically discernable deviation in the masticatory musculature. Ten adult subjects with adjudged normal occlusions were used. An additional study was under taken to determine the time necessary for the right and left temporal and masseter muscles to accommodate this disruption. Myographic recordings were taken of the subjects while closing firmly in centric occlusion and chewing Dentyne gum first on the right side, then on the left.

Contact disruption was accomplished with a metal shim of .003 inch thickness and later in …

A Cephalometric Evaluation Of The Navajo Indian, Robert L. Cole

Loma Linda University Electronic Theses, Dissertations & Projects

A random sampling of 54 Navajo Indians was examined and a selective group of 20 subjects presenting harmonious facial profiles and good occlusions were taken from this random sampling for specific comparison with Caucasian and other ethnic groups.

The methods used in this study are as follows: Plaster casts of Maxillary and Mandibular dental arches, profile photographs and lateral cephalometric X-rays. The cephalometric X-rays were traced in the standard manner on both Downs' and Riedel's analyses. The mean values for the Navajo group were compared with the mean values established for Caucasians by Downs and Riedel. The comparison was subjected …

The Incidence Of Dental Caries, Periapical Root Resorption, And Alveolar Bone Loss Among The Navajo Indians Of Monument Valley, Utah, Ronald J. Fasano

Loma Linda University Electronic Theses, Dissertations & Projects

In a pilot anthropometric study of 52 Navajo Indians of Monument Valley, Utah, the incidence of dental caries, permanent tooth periapical root resorption, and alveolar bone loss was assessed. The relationship of tooth malpositioning to the specific parameter was subsequently determined.

The sample was divided into arbitrary age groups.

Periapical roentgenograms were taken of each subject and were used in the assessment of dental caries, periapical root resorption, and alveolar bone loss. Data from a specially prepared examination sheet augmented the findings from the roentgenograms.

Tooth malpositioning and arch relationships were determined from the study casts. Occlusion was then classified. …

Histogenesis Of Plasma Cells In Inflamed Oral Mucosa, Kenneth E. Nowlan

Master's Theses

No abstract provided.

A Comparison Of The Toxohormone Content Of Human Malignant Tissues, Laurence Lowell Mccarthy

Master's Theses

No abstract provided.

Stability Of The Orthodontically Treated Dentition: A Study Of Interocclusal Contacts And Their Relationship To The Stability Of The Orthodontically Treated Dentition, Joseph Bassler

Master's Theses

No abstract provided.

The Histologic Changes Following Apicoectomy In The Root Filled Tooth Of Dogs, Sarit K. Ghose

Master's Theses

No abstract provided.

Determination Of Streptococcal-Hyaluronidase In Human Carious Dentin, Saryubala Parikh

Master's Theses

No abstract provided.

A Histological Study Of The Periodontium In A Tooth Bearing Bone Graft, Robert Misiewicz

Master's Theses

No abstract provided.

The Efficacy Of A Limited Clinical Undergraduate Orthodontic Program, Benjamin H. Robson

Loma Linda University Electronic Theses, Dissertations & Projects

One of the major and long standing problems in undergraduate education has been the operation and maintenance of an efficient orthodontic clinic.

Literature based on the history of undergraduate orthodontic clinics, as well as of previous investigations into their operations was reviewed. Little if any, specific recorded information could be found.

The specific purpose of this investigation was to inspect the elements of and the accomplishments of a specific undergraduate orthodontic clinic. The efficacy was based upon an investigation along two avenues of study: (1) A complete review of all case histories and records for an analysis of the nature …

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 …