Impacted tooth frequently appears in upper cuspid and upper central incisors(except of the third molar) .
Serious tooth defect which involved cuspid, incisal Angle, marginal ridge and occlusal surface can't be filled and need occlusal reconstruction.
Conclusion: Predicting the tooth size of cuspid and bicuspid group in malocclusion can't simply follow the law of normal occlusion.
