Dental School, Department of Prosthodontics, University of Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany.
Zahnarztpraxis Dr. Schröder & Partner, Kronenstrasse 20, 70173, Stuttgart, Germany.
BMC Oral Health. 2020 Jul 9;20(1):197. doi: 10.1186/s12903-020-01178-4.
To assess changes in apical bone height/bone gain over up to 8 years after implant placement combined with simultaneous internal sinus-floor elevation (ISFE) without use of graft.
217 implants were placed in combination with graft-free ISFE and successfully healed in the posterior maxilla of 138 patients. Radiographs after surgery across an evaluation time of up to 8 years were analyzed. Changes in apical and marginal bone height related to the implants were measured. Differences in bone height over the study period were evaluated by use of Wilcoxon tests. To identify possible influencing factors on apical bone gain and marginal bone loss, backward linear regression variable selections and linear mixed regression models were performed.
At the apical aspects of the implants, significant mean vertical bone gain of 2.4 mm (mesial) and 2.6 mm (distal) was observed after 6 months (p < 0.05). Radiographic analysis yielded additional bone gain of up to approximately 3.5 mm over the study period. Small initial bone height was crossed with more pronounced apical bone gain (p < 0.05).
If implants are placed combined with graft-free ISFE, significant vertical bone gain, especially in the first year post-op, can be expected. Smaller initial bone height is associated with a higher likelihood for greater bone gain.
评估种植体植入同时进行无植骨的内提升窦底增高（ISFE）后长达 8 年的根尖骨高度/骨增量变化。
在 138 名患者的上颌后区，共植入 217 个种植体，并与无植骨的 ISFE 联合使用，这些种植体均成功愈合。对术后长达 8 年的评估时间内的影像学资料进行分析。测量与种植体相关的根尖和边缘骨高度的变化。通过 Wilcoxon 检验评估研究期间骨高度的差异。为了确定影响根尖骨增量和边缘骨吸收的可能因素，采用向后线性回归变量选择和线性混合回归模型进行分析。
在种植体的根尖部位，在术后 6 个月时观察到有意义的平均 2.4mm（近中）和 2.6mm（远中）的垂直骨增量（p<0.05）。在研究期间，影像学分析得出了额外的约 3.5mm 的骨增量。初始骨高度较小与更明显的根尖骨增量相关（p<0.05）。
如果种植体与无植骨的 ISFE 联合植入，可以预期会有显著的垂直骨增量，特别是在术后第一年。初始骨高度较小与更大骨增量的可能性增加相关。
