pISSN 2234-7518
eISSN 2005-372X

Table. 3.

Sum of the average number of congenitally missing tooth and tooth with short root according to the Parry–Romberg syndrome (PRS) severity index

PRS severity index Patient Congenitally missing tooth Tooth with short root Sum of congenitallymissing tooth andtooth with short root
Mild #1 0 0 0
#4 0 0 0
#8 2 1 3
Mean 0.67 (n = 2/3) 0.33 (n = 1/3) 1.0 (n = 3/3)
Moderate #3 3 1 4
#5 2 6 8
Mean 2.5 (n = 5/2) 3.5 (n = 7/2) 6.0 (n = 12/2)
Severe #2 2 1 3
#6 9 2 11
#7 0 0 0
#9 11 0 11
#10 0 6 6
Mean 4.4 (n = 22/5) 1.8 (n = 9/5) 6.2 (n = 31/5)

Mild, Total score < 140; Moderate, total score between 140 and 170; Severe, total score ≥ 180.

Korean J Orthod 2020;50:407~417 https://doi.org/10.4041/kjod.2020.50.6.407
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