The classification of single-rooted, pulpless teeth.

This paper draws attention to the important role of supragingival tooth structure in providing resistance to displacing forces, particularly transverse forces, on crown posts. Evaluation of the success rate of crown posts has indicated that remaining tooth structure and post space configuration should be taken into consideration during treatment planning. To facilitate the recording of, treatment planning for, and communication about the restoration of pulpless teeth, a simple classification of the remaining tooth structure is proposed.