1. Immediate and six-month space changes after premature loss of a primary maxillary first molar 
Yai-Tin Lin, DDS, MS, Wen-Hsien Lin, DDS, Yng-Tzer J. Lin, DDS, MS 
The Journal of the American Dental Association 
Volume 138, Issue 3, Pages (March 2007)
DOI: /jada.archive
Copyright © 2007 American Dental Association Terms and Conditions

2. Figure 1
Measurements of the primary molar (D + E) space, arch perimeter, intercanine width and intercanine length.
The Journal of the American Dental Association  , DOI: ( /jada.archive )
Copyright © 2007 American Dental Association Terms and Conditions

3. Figure 2 Measurements of the arch width and arch length.
The Journal of the American Dental Association  , DOI: ( /jada.archive )
Copyright © 2007 American Dental Association Terms and Conditions