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Fig. 1 | BMC Oral Health

Fig. 1

From: A comparison of the shaping ability of three nickel-titanium rotary instruments: a micro-computed tomography study via a contrast radiopaque technique in vitro

Fig. 1

Representation drawing of tooth section showing how transportation and centring ratio were derived. Dark shaded area represents original canal space, and grey shaded area represents canal’s shape after instrumentation. X1 = shortest distance from the distal edge of the blocks to the distal periphery of the pre-instrumented canal; X2 = minimum distance between the distal of the blocks to the distal periphery of the instrumented canal; Y1 = shortest distance from the mesial edge of the blocks to the corresponding periphery of the pre-instrumented canal; and Y2 = the minimum distance between the mesial edge of the blocks to the mesial periphery of the instrumented canal

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BMC Oral Health

ISSN: 1472-6831

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