Depth of the curve of Spee in two ancient civilizations

مرکز و کتابخانه مطالعات اسلامی به زبان های اروپایی

منو

" Depth of the curve of Spee in two ancient civilizations "
Hala Taha

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	55040
Doc. No	:	TL24994
Call number	:	‭1465934‬
Main Entry	:	Hala Taha
Title & Author	:	Depth of the curve of Spee in two ancient civilizations\ Hala Taha
College	:	University of Illinois at Chicago
Date	:	2009
Degree	:	M.S.
student score	:	2009
Page No	:	53
Abstract	:	Objective . The aim of this research is to compare whether there is any difference in the depth of the curve of Spee of adult individuals from two ancient civilizations with different dietary background: Peru (700-1400 A.D.) and Kish (Iraq, 3000-2500 B.C.) Materials and methods . From the catalogue archives of the Field Museum of Chicago, 45 mandibles from the Peru collection and 38 mandibles from the Kish collection were considered for inclusion in the study. The selected mandibles were then examined by the investigator from which 34 half mandibles were included in the study. The two samples consisted of 17 adult Peruvian and 17 adult Kish half mandibles having almost a complete number of teeth. Scanning of the mandibles was done using a 3D laser surface scanner (Roland LPX 600, Roland DGA corporation, California, USA). The STL images were imported into Mimics software version 10.0 (Materialise, Leuven, Belgium) for analysis. Measurement of the depth of the curve of Spee at the first and second premolars as well as at the mesial and distal cusp tips of the mandibular first molar was done. Determination of the lowest point of the curve was made. The depth of the curve of Spee at the lowest point of the curve (biggest distance) was the one recorded for each half mandible. Results . The depth of the curve of Spee for the Kish sample ranged from 1.11 mm to 3.51 mm with a mean of 1.91 mm. As for the Peru sample, the depth of the curve of Spee ranged from 0.83 mm to 6.86 mm with a mean of 2.48 mm. Student t -test was used to compare the two means of the depth of CS in the two samples. Results show no significant difference between the mean depth of the curve of Spee at its lowest point in the two samples. For both samples the deepest point of the curvature was more frequently located on the mesial cusp of the first molar. Conclusions . The depth of the curve of Spee does not show statistically significant difference between the two civilizations although the Peru sample displayed more variability (SD for the Peruvian sample was 1.48 versus 0.66 for the Kish sample). Key words . Curve of Spee, Leveling of the curve of Spee.
Subject	:	Health and environmental sciences; Dentistry; 0567:Dentistry
Added Entry	:	University of Illinois at Chicago