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Table 1 Burke’s classification for modes of crown fracture

From: Fracture resistance of prefabricated versus custom-made zirconia crowns after thermo-mechanical aging: an in-vitro study

Code

Interpretation

I

Minimal fracture or crack in crown

II

Less than half of crown lost

III

Crown fracture through midline

IV

More than half of crown lost

V

Severe fracture of crown and/or tooth

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BMC Oral Health

ISSN: 1472-6831

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