Three-dimensional changes and influencing factors of tent space following osteotome sinus floor elevation without grafting: A 48-month retrospective radiographic study

IF 4.8 1区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE Clinical Oral Implants Research Pub Date : 2024-06-14 DOI:10.1111/clr.14312

Wen Zhang, Haida Chen, Ke Zhao, Xinhua Gu

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Abstract

Objectives

To analyze the three-dimensional stability and morphologic changes of tent space after the osteotome sinus floor elevation (OSFE) procedures without bone grafts.

Materials and Methods

Forty-six implants placed using the OSFE technique with simultaneous implant placement without bone grafts were included in this retrospective study. Cone-beam computed tomography (CBCT) scans of the augmented sinuses were obtained pre- and postoperatively up to 48 months of follow-up. The maxillary sinus cavity profiles were outlined using three-dimensional virtual reconstruction and superimposition of CBCT scans. The three-dimensional changes in the tent space were measured. A generalized estimating equation (GEE) was used to explore potential factors.

Results

The implant survival rate was 97.8%. The mean volume of remaining tent space immediately after surgery was 96.8 ± 70.5 mm³, shrinking to 31.0 ± 24.9 mm³ after 48 months, while the mean percentage of remaining tent space volume decreased to 29.1 ± 20.7%. The tent space volume and the percentage of residual tent space volume only decreased significantly within 12 months after surgery (p = .008, .013). GEE results indicated positive correlations between the percentage of remaining tent space volume and implant protrusion length (p = .000) and apical height (p = .000), with a negative correlation between the sinus floor area immediately after surgery (p = .002) and the healing time (p = .022).

Conclusions

The volume of the tent space rapidly shrank after OSFE without bone grafts. Several factors might influence the tent space stability. Long-term clinical trials with larger sample sizes are necessary to further validate the results.

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截骨窦底提升术后帐篷空间的三维变化和影响因素：一项为期 48 个月的回顾性放射学研究。

目的分析不植骨的骨刀窦底提升（OSFE）术后帐篷空间的三维稳定性和形态变化：这项回顾性研究共纳入了 46 个使用 OSFE 技术植入的种植体，同时植入种植体时未进行植骨。在术前和术后48个月的随访中，对植入的上颌窦进行了锥形束计算机断层扫描（CBCT）。通过三维虚拟重建和 CBCT 扫描的叠加，勾勒出上颌窦腔的轮廓。测量了蝶窦空间的三维变化。采用广义估计方程（GEE）来探讨潜在因素：种植体存活率为 97.8%。术后剩余帐幕空间的平均体积为 96.8 ± 70.5 mm3，48 个月后缩小至 31.0 ± 24.9 mm3，剩余帐幕空间体积的平均百分比降至 29.1 ± 20.7%。帐篷间隙体积和剩余帐篷间隙体积百分比仅在术后 12 个月内显著下降（p = .008, .013）。GEE 结果表明，剩余帐幕空间体积百分比与种植体突出长度（p = .000）和根尖高度（p = .000）呈正相关，与术后即刻的窦底面积（p = .002）和愈合时间（p = .022）呈负相关：结论：在不植骨的情况下，OSFE术后窦腔体积迅速缩小。有几个因素可能会影响帐篷间隙的稳定性。为了进一步验证结果，有必要进行样本量更大的长期临床试验。

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来源期刊

Clinical Oral Implants Research 医学-工程：生物医学

CiteScore

7.70

自引率

11.60%

发文量

149

审稿时长

3 months

期刊介绍： Clinical Oral Implants Research conveys scientific progress in the field of implant dentistry and its related areas to clinicians, teachers and researchers concerned with the application of this information for the benefit of patients in need of oral implants. The journal addresses itself to clinicians, general practitioners, periodontists, oral and maxillofacial surgeons and prosthodontists, as well as to teachers, academicians and scholars involved in the education of professionals and in the scientific promotion of the field of implant dentistry.