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Three-dimensional changes in mandibular jaw cysts following decompression surgery: a retrospective cohort study
Clemens Raabe1,2, Valerie Schmidt3, Martina Schriber4
1Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, Bern, CH-3010, Switzerland. clemens.raabe@unibe.ch.
BMC Oral Health
|January 26, 2026
Summary
Decompression surgery effectively reduces mandibular cyst size, with patient age and sex influencing reduction rates. Measurements using cone-beam computed tomography (CBCT) showed high reliability.
Area of Science:
- Oral and Maxillofacial Surgery
- Radiology
- Oncology
Background:
- Mandibular jaw cysts can grow large, necessitating effective treatment.
- Decompression surgery is a common initial approach for large cysts.
- Understanding dimensional changes and influencing factors is crucial for treatment planning.
Purpose of the Study:
- To evaluate three-dimensional changes in mandibular cysts after decompression surgery.
- To identify factors affecting cyst size reduction rates.
- To assess the reliability of measurements using cone-beam computed tomography (CBCT).
Main Methods:
- Retrospective cohort study analyzing CBCT scans before and after decompression.
- Two examiners measured cyst dimensions using specialized 3D software.
- Patient demographics, cyst type, and bone perforation were recorded.
Main Results:
- Mean cyst volume decreased significantly (p < 0.0001) by -5.2% monthly.
- Female and younger patients exhibited higher reduction rates.
- Measurement reliability was high (intraclass correlation coefficients > 95%).
Conclusions:
- Decompression is an effective first-stage treatment for large mandibular odontogenic cysts.
- Patient age and sex, but not cyst characteristics, showed limited influence on dimensional changes.
- CBCT measurements demonstrated excellent reproducibility.
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