拔牙后牙槽窝即刻植入纳米羟基磷灰石的临床观察

Clinical Study on Immediate Implantation of Nano-hydroxyapatite(nHA) after Tooth Extraction

目的:研究拔牙后即刻植入纳米羟基磷灰石颗粒预防术后牙槽骨吸收,保持牙槽嵴高度的临床疗效。方法:选择16例需同时拔除下颌两侧相同部位后牙的患者,按左右分组,左侧为拔牙后立即填塞颗粒型纳米羟基磷灰石,右侧为拔牙后传统搔刮血块充盈对照。4周、12周分别复诊,摄X线片检查。对牙槽窝的愈合,牙槽嵴高度进行观察。结果:16例患者创口愈合良好。两组比较,12周后实验组X线片见牙槽窝处的X线阻射影与周围牙槽骨密度相近,界限不清,恢复的牙槽嵴与周围基本平齐,牙槽高度恢复良好。对照组牙槽嵴高度明显降低,实验组牙槽嵴高度降低不明显。结论:拔牙创内即刻植入纳米羟基磷灰石不影响创口愈合,能促进新骨的形成,很好地维持牙槽嵴高度,为以后进行义齿修复提供一个良好的基骨条件。

Objective：The purpose of this study is to investigate the effect of nano-hydroxyapatite（nHA）after teeth extraction.on maintaining the height of alveolar ridge.Methods：16 cases,who needed teeth extraction were divided into two groups：one received implantation of nano-hydroxyapatite（nHA）immediately after teeth extraction;the other was kept vacant after teeth extraction as the control group.X-ray was taken immediately after operation,4 and 12 weeks postoperative respectively.Results：All wounds healed well without any complication.Compared to the alveolar bone just after tooth extraction,the height of implanted nHA alveolar ridge kept well and reconstructed perfectly.Conclusion：Implantation of nano-hydroxyapatite（nHA）after teeth extraction could maintain and reconstruct the height of the alveolar ridge and avoid the complication.It would be helpful for the following prosthetic restoration of artificial tooth.