[Clinical effects of two different hydroxyapatite bone graft materials during maxillary sinus lifting surgery with...

To compare the clinical effects of two different hydroxyapatite bone graft materials in maxillary sinus lifting surgery with bone grafting and implantation at the same time.

Seventy-two patients with implantation in the maxillary posterior dental area and insufficient bone mass admitted to the First Affiliated Hospital of Bengbu Medical College were collected from March 2018 to April 2019, and they were divided into experimental group(n=36) and control group(n=36) by random number table. Patients in the control group used hydroxyapatite composite material, while patients in the experimental group used nano-hydroxyapatite composite material. The clinical effects, bone increment and bone density changes of the two groups of implants were compared, and postoperative implant stability and complications of the two groups were compared. Statistical analysis was performed with SPSS 18.0 software package.

The survival rate of implants in the experimental group was significantly higher than that in the control group at 24 months (P＜0.05). Alveolar bone resorption in the experimental group was significantly lower than the control group 6 months after surgery(P＜0.05). The bone mineral density of implants in the experimental group was significantly higher than the control group 6 months and 12 months after operation(P＜0.05). The implant stability coefficient value of the experimental group was significantly higher than the control group 12 months after operation(P＜0.05). There was no significant difference in the total complication rate between the two groups(P＞0.05).

In maxillary sinus lift, the survival rate of nano-hydroxyapatite composite material implanted in the same period is high, which can improve postoperative bone metabolism and increase implant stability with good safety.