Crown Size-Arch Space Relationships During Human Prenatal Dental Development

As shown in composite reconstructions made from optically-projected measurements of 10μ frontal maxillofacial sections of 20 histologically normal fetuses and embryos in the 70-255 mm CRL range, individual differences in relative tooth size and interdental spacing are evident by 10.5-11 weeks of gestation, and age-corrected crown-size correlations (r=0.40) approximate those in postnatal life. Despite an eight-fold increase in crown dimensions, interdental spacing remains approximately constant after 150 mm CRL, suggesting that the tooth organs or the periodontal membranes are able to maintain spacing, into the third trimester.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/67036/2/10.1177_00220345790580020301.pd

Crown Area as an Indicator of Changing Crown Size in Human Pre-natal Teeth

This study deals with correlations of tooth size in human primary teeth. Traditionally, mesiodistal or buccolingual measurements have been used to express crown size. However, in this study, crown area was used as a reference parameter. Graphic reconstructions of 38 histologically prepared human fetuses with Crown-Rump Length (CRL) between 54 and 280 mm were used to obtain linear and area measurements. Based on clinical records and physical examinations, these fetuses were considered typical-for-age, or "normal". Correlation matrices indicated high levels of concordance among all developing deciduous tooth crowns and arch measurements. It was concluded that crown area is a statistically better trait to use in comparison of teeth rather than the traditional mesiodistal measurement.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/66806/2/10.1177_00220345840630111001.pd

D E Space-A Realistic Measure of Changes in Arch Morphology: Space Loss Due to Unattended Caries

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/67893/2/10.1177_00220345800590100401.pd