Evaluation the resistance form to oblique forces of teeth prepared to receive full crowns by a novel mathematical method

الملخص EN

Background and aim: Full crown preparation must have resistance form geometry.

The aim of this study was to investigate whether full crown preparation of undergraduate students work have resistance to oblique forces.

Methods: The resistance of 41 first or second lower molars preparation of undergraduate students work to receive full crowns were examined by measuring three dimensions.

These dimensions gave an indication whether a resistance form exists or not.

Results: The preparations had no resistance towards the buccal direction in 71%, nor towards the lingual direction in 90% of the cases.

Conclusion: Students should pay more attention to the resistance form geometry when preparing teeth to receive full crowns