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

Wen Zhang ¹, Haida Chen ², Ke Zhao ²

⁰Department of Stomatology, Quzhou Hospital of Traditional Chinese Medicine, Quzhou, Zhejiang Province, China.

Clinical Oral Implants Research +

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June 14, 2024

View abstract on PubMed

Summary

The space created by osteotome sinus floor elevation (OSFE) without bone grafts shrinks significantly within 12 months. Implant protrusion and apical height correlate with tent space volume, suggesting factors influencing stability.

Area Of Science

Oral and Maxillofacial Surgery
Dental Implantology
Bone Regeneration

Background

Osteotome sinus floor elevation (OSFE) is a technique to augment the maxillary sinus for dental implants.
Understanding the dimensional stability of the created space (tent space) is crucial for long-term implant success.
The use of OSFE without bone grafting presents a unique scenario for tent space evolution.

Purpose Of The Study

To analyze the three-dimensional stability and morphologic changes of the tent space after OSFE procedures performed without bone grafts.
To identify factors influencing tent space stability over time.

Main Methods

Retrospective study of 46 implants placed with OSFE without bone grafts.
Cone-beam computed tomography (CBCT) scans used for pre- and post-operative analysis up to 48 months.
Three-dimensional virtual reconstruction and superimposition of CBCT scans to measure tent space changes.

Main Results

High implant survival rate of 97.8%.
Significant reduction in tent space volume and percentage of remaining volume within 12 months post-surgery.
Positive correlations found between remaining tent space volume and implant protrusion length and apical height.

Conclusions

The tent space volume significantly shrinks after OSFE without bone grafts, primarily within the first year.
Implant protrusion length, apical height, initial sinus floor area, and healing time are potential factors influencing tent space stability.
Further long-term clinical trials with larger sample sizes are recommended to validate these findings.

Keywords:

bone regeneration cone‐beam computed tomography dental implants implant stability maxillary sinus sinus floor elevation