Conclusion
pain
The present study showed that in the clinical protection of mandibular second molar, both two test groups could achieve stable long-term bone defect repair. The use of CGF gel and CGF membrane could alleviate short-term pain after surgery, accelerate early-stage bone repair, reduce long-term probing depth and relieve economic cost for patients. Therefore, in the strategy of clinical protection of mandibular second molar, this new bone repair protocol is worthy of promotion by clinicians.