Endocrown and 90° Shoulder Endocrown

Inclusion Criteria

• •1. 18-60 year old patients with healthy body, the tooth is molar, root tip no obvious damage, no root fracture by X-ray;
• •2. after complete root canal therapy, the remaining 4 wall intact tooth tissue;
• •3. after complete root canal therapy, the remaining 3 wall intact tooth tissue;
• •4. have good oral hygiene habits;
• •5. agreed to participate in the trial and signed the informed consent form;
• •6. patients who are not participating in other clinical trials;
• •7. after completion of the repair, compliance with the USPHS evaluation criteria of marginal density class A cases