Orthodontics and Orthodontology Commons^™

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 …

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 …

Space (1965), American Dental Association, American Society Of Dentistry For Children

Patient Dental Health Education Materials 1929-1981

No abstract provided.

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 …

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 …

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 …

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 …

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. …

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 …

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 …

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 …

Cranial Base Changes In Patients Treated With Cervical Traction And Bite Plane, Arthur J. Morgan

Loma Linda University Electronic Theses, Dissertations & Projects

During orthodontic treatment extra-oral forces of considerable magnitude are applied to the maxillary molar teeth to correct an anterior-posterior maxillary mandibular dysplasia.

The treatment method of choice with Class II, Division 1 malocclusions in the late mixed dentition and early permanent dentition age is generally with the use of cervical traction.

The purpose of this study is to determine the effect of cervical traction on the development of the cranial base in patients subjected to Its use.

This investigation utilized before treatment and after treatment lateral cephalometric roentgenograms of twenty-five patients presenting a Class II, Division 1 malocclusion. Post treatment …

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 …

Ann Looks Just Like Me (1963), American Dental Association

Patient Dental Health Education Materials 1929-1981

No abstract provided.

A Technique For Studying The Spacial Relationship Of Oral Hard Tissues Utilizing Panoral Radiography, Howard W. Conley

Loma Linda University Electronic Theses, Dissertations & Projects

Although panoral radiography employing various techniques has been described in the literature since 1949, no information is available relative to its application in quantification of positional charge of the hard tissues of the oral region.

An assessment of the radiographic equipment available to this investigator for quantification studies seemed imperative before embarking on this research.

In order to establish a standard, five exposures were made on radiographic film rotating the source of radiation from left to right and from right to left. These films were superposed and it was established that the tolerances found using the Panorex machine were within …

A Myometric Evaluation Of Certain Aspects Of The Perioral Musculature In Individuals With Demonstrable Adverse Swallowing Patterns, John Milford Anholm

Loma Linda University Electronic Theses, Dissertations & Projects

The forces exerted by the perioral musculature and the effects observed in subjects with adverse swallowing patterns accompanied by demonstrable mentalis habits were compared with a control group of "normal" subjects by the following methods:

1. Study casts of upper and lower arches were obtained for a morphological evaluation of denial structures.

2. Measurements of lip pressures against the teeth were recorded for the following:

a. Drinking water

b. Volitional and spontaneous swallows

c. Designated speech sounds

d. Maximum effort pressure

3. Measurements of inter-lip pressures were recorded at the center and corner of the mouth for the following:

a. …

Orthodontics Questions And Answers (1962), American Dental Association, American Association Of Orthodontists

Patient Dental Health Education Materials 1929-1981

No abstract provided.

Smile, Judy! (1960), American Dental Association

Patient Dental Health Education Materials 1929-1981

No abstract provided.

To The Dentist It's Malocclusion (1959), American Dental Association

Patient Dental Health Education Materials 1929-1981

No abstract provided.

Orthodontics Questions And Answers (1956), American Dental Association, American Association Of Orthodontists

Patient Dental Health Education Materials 1929-1981

No abstract provided.

Orthodontics (1945), American Dental Association. Bureau Of Public Relations, Allan G. Brodie

Patient Dental Health Education Materials 1929-1981

No abstract provided.