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Table 1 Changes in canal volumes, surface areas, and the percentages of surface unchanged after preparation

From: The effect of a manual instrumentation technique on five types of premolar root canal geometry assessed by microcomputed tomography and three-dimensional reconstruction

 

Tooth (canal system classification)

 

A (type I)

B (type II)

C (type III)

D (type IV)

E (type V)

Δ Volume (mm3) *

0.84

5.67

7.30

4.05

4.16

 

+4.8%

+150.2%

+96.7%

+85.6%

+146.3%

Δ Area (mm2) *

2.95

19.99

28.26

15.59

17.57

 

+3.4%

+42.9%

+42.4%

+32.9%

+49.0%

Δ Percentage (%)

83.0%

28.9%

41.1%

40.7%

27.4%

  1. *Absolute scores (upper lines) and relative findings (lower lines), expressed as percentages of the initial values.