Ic. Mackie et al., A FOLLOW-UP-STUDY OF INCISOR TEETH WHICH HAD BEEN TREATED BY APICAL CLOSURE AND ROOT FILLING, British Dental Journal, 175(3), 1993, pp. 99-101
A follow-up study was conducted of 93 non-vital immature incisor teeth
treated by apical closure and root filling. Only six teeth had been l
ost and these losses were due to trauma, failed restorative treatment
or root resorption. Life table analysis suggested that 86% of teeth wo
uld still be present after 5 years. The number of teeth at risk was to
o small after 5 years to provide precise enough estimates of the perce
ntage of survivors.