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Abstract
The purpose of this study was to determine if there were differences in the angle of eminentia of two 20th century populations based on race, age, gender, and number of teeth and whether there was asymmetry of the angles of eminentia. The sample included dry skulls from the Hamann-Todd Osteological collection as follows: 80 African-Americans (AA, 53 males and 27 females) and 62 European-Americans (EA, 49 males and 13 females), ranging in age from 16-77 years. The lateral, central, and medial aspects of the right and left slopes of the articular eminence were measured in a parasagittal plane. Independent t-tests, paired t-tests, and Pearson correlation coefficients were computed. For the AA population, the right central, lateral, and medial angles of eminentia were steeper than the corresponding left angles (paired t-test, p<0.05); for the AE males only the right lateral and medial angles were significantly steeper than the corresponding left angles (paired t-test, p<0.05). There were no significant relationships between age or number of teeth and the angle of eminentia measurements, nor were there differences in angle of eminentia by gender. There were two differences by race: the EA males had steeper left central and left medial angles than the AA males (independent t-test, p<0.05). The central angle of eminentia was consistently steeper than the medial angle (paired t-test, p<0.01), and the lateral was generally steeper than the medial.
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Notes on contributors
T. Roma Jasinevicius
Dr. T. Roma Jasinevicius received her dental degree from Case Western Reserve University (CWRU) School of Dental Medicine (Cleveland, Ohio) in 1976 and her Masters in Education–Adult Learning and Development from Cleveland State University in 1997. She is presently an assistant professor and course director of dental anatomy and masticatory dynamics in the Comprehensive Care Department at CWRU School of Dental Medicine. She is a member of the American Dental Education Associa-tion and IADR/AADR professional organizations.
Marsha A. Pyle
Dr. Marsha A. Pyle is currently the Associate Dean of Curriculum at Case Western Reserve University School of Dental Medicine. She earned her D.D.S degree from CWRU in 1984 and her Masters in Education from Cleveland State University in 1997. She completed a fellowship in Geriatric Training from University Hospitals (Cleveland, Ohio) in 1991. She is the Director of the CWRU Training Center for Geriatric Oral Health. She is also an asssistant professor of geriatric dentistry in the Division of Geriatric Medicine at the CWRU School of Medicine. She is a member of the ADA, ADEA, and IADR/AADR.
James A. Lalumandier
Dr. James A. Lalumandier received his D.D.S. degree from Georgetown School of Dentistry (Washington, D.C.) in 1973 and an M.P.H. from the University of North Carolina in 1989. He is Board Certified in Dental Public Health. He is presently Chair of the Department of Community Dentistry. He is a member of the American Association of Public Health, International Academy of Sports Dentistry, and ADEA.
Suchitra Nelson
Dr. Suchitra Nelson received an M.S. in nutrition in 1984, and an M.S. in 1988 and Ph.D. in 1992 in epidemiology from Case Western Reserve University. She is currently an assistant professor in the Department of Community Dentistry at CWRU School of Dental Medicine (Cleveland, Ohio). She is a member of the ADEA and IADR/AADR professional organizations.
Keith J. Kohrs
Dr. Keith J. Kohrs is an orthodontist in Aurora and Strasburg, Colorado. He received his D.D.S. degree from Case Western Reserve University in 2000 and a certificate in orthodontics from Oregon Health and Sciences University in 2002.
Danny R. Sawyer
Dr. Danny R. Sawyer received his D.D.S. degree from the School of Dentistry, Medical College of Virginia of Virginia Commonwealth University (MCV/VCU) in 1973 and his doctorate in General and Experimental Pathology in 1977 along with a certificate of Resident Specialty in oral maxillofacial pathology from MCV/VCU. A diplomate in the American Board of Oral Medicine, he is presently Chair of the Department of Oral Diagnosis and Radiology at CWRU School of Dental Medicine. Dr. Sawyer has published over 90 research articles and textbook chapters dealing with oral diagnosis and pathology.