Abstract: Evaluation of therapeutic effects on cracked teeth preserving SUN ShuWen , BAILian. (Fifth Clinic, Peking University School andHospital of Stomatology, Beijing 100020, China) Abstract: Objective To investigate the clinical methods of preserving cracked teeth that need to have a root canal therapy . Methods 75 cracked teeth that need to have a root canal therapy were included.These cases were treated with occlusal adjustment, root canal therapy, resin restoration，temporary crown restoration，full crown restoration. And then follow- up results were evaluated. Results The results were satisfactory in 57 teeth (>=2 years) and failure in 18 teethafter treatment . Conclusions Indicationsshould be restricted according tocrack range，periodontal condition and the relevance between the former two, and full crown restoration. The use of rubber dam, occlusal adjustment, temporary crown repair and complete coronal restoration after root canal therapy can be effective in preventing teeth fracture.Strict indications and teeth fracture prevention are the key of successful therapy. Key words: cracked tooth; root canal therapy;temporary crown restoration; full crown restoration

Key words: Key words: cracked tooth, root canal therapy, temporary crown restoration, full crown restoration