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Schneiderian membrane thickness variation following endodontic procedures: a retrospective cone beam computed tomography study.

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Thera van den Munckhof, Shanon Patel, Garrit Koller, Erwin Berkhout, Francesco Mannocci, Federico Foschi

Original languageEnglish
Article number133
JournalBMC Oral Health
Issue number1
Early online date6 May 2020
Accepted/In press28 Apr 2020
E-pub ahead of print6 May 2020
Published6 May 2020


King's Authors


Background: To assess the change of the Schneider membrane thickness measured by CBCT before and after root canal treatment, retreatment and pulp capping procedures. Methods: This retrospective study was conducted on CBCT scans of a patient population of Guy's Hospital NHS Foundation Trust, London. Three groups of patients were studied: Group 1 consisted of patients referred for primary endodontic treatment; Group 2 for endodontic retreatment; Group 3 for indirect pulp capping procedures (serving as a control group). Follow up scans were carried out 1 year after treatment. Measurements were carried out on CBCT scans and data were analysed statistically by Wilcoxon Signed Rank Test. Linear regression was used to assess predictive parameters for membrane thickness. Results: A statistically significant reduction of the Schneider membrane thickness was observed one year after endodontic treatment and retreatment (P < 0.05) but no significant reduction was observed after pulp capping procedures. Linear regression showed that age and gender were significant predictors influencing the Schneider membrane thickness. Conclusions: Within the limitations of this retrospective study, following root canal treatment and re-treatment a Schneiderian membrane thickness reduction occurred at 1-year follow-up. The removal of odontogenic infection following endodontic treatment may help reducing the thickness of the Schneider membrane.

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