Medicine and Health Sciences Commons^™

The Relationship Between The Lingual Surface Of The Maxillary Central Incisor And The Eminence Of The Mandibular Fossae, Robert A. Huffer

Loma Linda University Electronic Theses, Dissertations & Projects

Gnathologists have suggested that in order to prevent excessive wear on posterior teeth, alveolar bone loss due to traumatic occlusion, and temporomandibular Joint (TMJ) disturbances, the mandibular incisors should disclude the posterior teeth by moving along the lingual surfaces of the maxillary incisors as the condyles move down the articular eminence in protrusion. It is suggested that in order for this to occur, the lingual surface of the maxillary incisors should be steeper than the eminence.

A cephalometric technique was developed to accurately determine the anatomical form of the articular eminence. A regular orthodontic tracing of the head was done …

An Analysis Of Orthodontic Treatment Results Employing Class Ii Armstrong Adjustable Intermaxillary Springs, Michael E. Shumate

Loma Linda University Electronic Theses, Dissertations & Projects

A study of orthodontic treatment results employing Class II Armstrong Adjustable Intermaxillary Springs was made on twenty-eight randomly selected patients which were treated by Dr. Maclay Armstrong.

The skeletal and dental changes observed during treatment with the Class II springs was compared with those results observed when comparable type malocclusions were treated with Class II elastics. A list of changes which were observed during treatment with Class II elastics was compiled from the literature using individual studies published by Ricketts, Creekmore and Hanes.

The study was based on the findings observed in the initial and final cephalometric radiographs. A statistical …

Maximum Opening And Closing Forces Exerted By Diverse Skeletal Types, Erkut Yildirim

Loma Linda University Electronic Theses, Dissertations & Projects

An appliance was constructed to measure the maximum opening force, whereas, a gnathodynamometer was utilized to record maximum closing force of 44 subjects. The collected data was analyzed by computer, regardless of sex, to determine both the mean and the standard deviation of the opening forces, and the average right and left side closing forces. The data was also computed for the above mentioned variables to find out the mean and the standard deviation for both sexes. The Student's t test was utilized to determine if there were any significant differences in the before mentioned variables. A linear correlation analysis …

Induced Early Closure Of The Spheno-Occipital Synchondrosis In The Guinea Pig, Arthur A. Ewert

Loma Linda University Electronic Theses, Dissertations & Projects

This study was designed to explore the significance of the spheno-occipital synchondrosis in cranial base and craniofacial development.

Premature fusion of the spheno-occipital synchondrosis in the guinea pig was induced by placing a wire staple in the cranial base across the synchondrosis. One end of the staple was placed in the basi-occipital bone and the other end in the basi-sphenoid bone.

Results of this early closure showed marked changes in craniofacial morphology. The entire cranium anterior to the auditory bullae dropped down in relation to the axial skeleton. The cranial base from basion to the intersphenoidal synchondrosis was markedly shortened. …

Correlation Of The Epiphyseal Closure And Ossification Of The Ulnar Sesamoid Bone Of The Metacarpophalangeal Joint Of The Thumb, Hilbert Lentz

Loma Linda University Electronic Theses, Dissertations & Projects

The purpose of this investigation was to determine if there is a correlation between the times of closure of the epiphyses of the hand and the time of ossification of the ulnar sesamoid of the metacarpophalangeal joint of the thumb.

The time for these events was studied in twenty-three males and fourteen females for which appropriate hand radiographs were available. Radiographs were made every three months and epiphyseal closure was studied in these beginning with the one in which the sesamoid first appeared. The maximum time for study after sesamoid closure was twenty-four months.

Only one subject showed complete closure …

The Role Of The Articular Eminence In Mandibular Protrusion, Norman E. Corbett

Loma Linda University Electronic Theses, Dissertations & Projects

Since movements of the TMJ may be translatory, rotary, or both, the form of the articular eminence becomes an integral part of the anatomy of the joint and is important in an understanding of TMJ function. A cephalometric technique was developed to accurately determine the anatomical form of the articular eminence. From a series of cephalograms, taken in various mandibular positions, the protrusive condylar path was determined. This path was also determined from a gnathological recording technique. The paths obtained were observed to be the same. The condylar path and articular eminence curves were mathematically expressed by computer programmed quadratic …

A Comparative Roentgenographic Cephalometric Study Of The Facial Profile Of Orthodontic Patients Treated At Loma Linda University With Winners Of The "Smiles Of The Year" Contest, Romeo I. Stoll

Loma Linda University Electronic Theses, Dissertations & Projects

The "Smiles of the Year" winners and patients treated at Loma Linda University by the extraction or non-extraction approach were compared by linear and angular variables of skeletal, dental and soft tissue components. These findings were analyzed statistically to determine significant differences in the profile and detect the relationship between the integument and hard structures.

The following conclusions were drawn from this investigation to reflect the trend of treatment at Loma Linda University.

1. After treatment the patients had less skeletal convexity, but were more convexity than established standards.
2. The incisors of the patients treated by the extraction approach were less …