Current developments in rotary root canal instrument ...

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480 VOLUME 41 • NUMBER 6 • JUNE 2010 QUINTESSENCE INTERNATIONAL Peters/Paqué Fig 2a Temperature-dependent transition from austenitic (brittle, hard) to martensitic (soft) crystalline lattices. M f, M s, A f, A s indicate martensitic and austenitic starting and finishing temperatures, respectively.

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