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! i<br />

majority of root fillings was noted in adults between 40 and 59 years of age. The<br />

number of root-filled canals per tooth (ratio) increased from 1.67 to 1.96. Concomitantly,<br />

the annual number of tooth extractions was more than halved (Fig. 3). The<br />

number of pulpotomies was substantially reduced from 30,616 in 1977 to 2357 in<br />

2003.<br />

-+-Tooth extraction<br />

250t---""

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