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. 2020 Aug 20;12(4):218–224. doi: 10.4047/jap.2020.12.4.218

Table 2. Classification of restoration failure according to Burke19.

Classification Pattern of fracture
Class I Minimal fracture or crack in crown
Class II Less than half of crown lost
Class III Crown fracture through midline; half of crown displaced or lost
Class IV More than half of crown lost
Class V Severe fracture of tooth and/or crown