Objectives: This study aims to evaluate the endo-sinus bone remodeling of dental implants placed via osteotome sinus floor elevation (OSFE) after 6 months and using different implant protrusion lengths and bone grafts through cone beam computed tomography (CBCT).
Methods: Ninety-six patients with 124 implants were included and assigned into four groups. Group 1: implant protrusion length<4 mm with bone graft; group 2: implant protrusion length>4 mm with bone graft; group 3: implant protrusion length<4 mm without bone graft; group 4: implant protrusion length>4 mm without bone graft. Apical bone gain (ABG), cortical bone gain (CBG), bone density gain (BDG), and marginal bone loss (MBL) were observed and analyzed at baseline and 6 months after implant surgery.
Results: The CBG in grafted groups 1 and 2 was higher than that in non-grafted groups. The ABG and BDG were higher in non-grafted groups 3 and 4 than in grafted groups, and the levels in group 3 were higher than those in group 4. The CBG in grafted group 2 was higher than that in group 1. No significant difference was observed in MBL analysis.
Conclusions: The BDG of IPL<4 mm implants was higher than IPL>4 mm implant when bone grafts were not applied. No relevance was observed between IPL and CBG. Bone grafts can accelerate endo-sinus bone remodeling by increasing CBG and dissipating the influence of IPL on BDG.
目的: 利用锥形束CT（CBCT）评价植骨与否和种植体突入长度（IPL）对上颌窦底内提升术后6个月的骨改建的影响。方法: 纳入96位患者，总计124颗种植体，将种植体分为：植骨且突入长度小于4 mm组（组1）；植骨且突入长度大于4 mm组（组2）；未植骨且突入长度小于4 mm组（组3）；未植骨且突入长度大于4 mm组（组4）。种植体植入后6个月，测量种植体顶端骨高度变化量（ABG）、皮质骨高度变化量（CBG）、骨密度变化量（BDG）和边缘骨吸收（MBL）指标，并进行统计分析。结果: 植骨的组1和组2的CBG高于不植骨组；未植骨的组3和组4的ABG和BDG高于植骨组；未植骨的组3的ABG和BDG均高于组4；植骨的组2的CBG高于组1；4组的MBL差异无统计学意义。结论: 不植骨条件下，与IPL<4 mm相比，IPL>4 mm者的BDG较小，IPL与CBG无相关性。植骨可通过增加皮质骨高度，使BDG不受IPL影响来加速成骨进程。.
Keywords: bone grafts; dental implant; implant protrusion length; osteotome sinus floor elevation.