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Schneiderian Membrane Thickness and Clinical Implications for Sinus Augmentation: A Systematic Review and
Alberto Monje1, Karla Tatiana Diaz2, Luisiana Aranda3
1Department of Periodontics and Oral Medicine, University of Michigan, Ann Arbor, MI.
Background:
Schneiderian membrane thickness (SMT) has been regarded as a key factor for influencing membrane perforation, which may jeopardize the final clinical outcome of sinus augmentation. Hence, this systematic review aims at studying the mean SMT and further investigating patient-related factors that may affect SMT. As a secondary goal, the association between SMT and membrane perforation rate was studied.
Methods:
Three independent reviewers in several databases, including MEDLINE, EMBASE, Cochrane Central Register of Controlled Trials, and Cochrane Oral Health Group Trials Register databases, conducted electronic and manual literature searches. This review was written and conducted according to the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) and MECIR (Methodological Expectations of Cochrane Intervention Reviews) guidelines. Quantitative assessment was performed for articles that met the inclusion criteria to investigate the mean SMT, its contributing factors, and the influence on membrane damage and surgical complications.
Results:
Thirty-one studies that reported maxillary SMT were considered for qualitative analysis. Nineteen were further meta-analyzed. Overall mean ± SE SMT was 1.17 ± 0.1 mm (95% confidence interval [CI] = 0.89 to 1.44). Although mean SMT for the three-dimensional radiography (3DR) group was 1.33 mm (95% CI = 1.06 to 1.60), for the histology group, it was 0.48 mm (95% CI = 0.12 to 1.1). Random-effects model showed that, although there is a trend for thicker SMT as determined using 3DR compared with histologic analysis, such difference did not reach statistical significance (P = 0.15). Also, regression analyses demonstrated that the variables periodontitis (P = 0.13) and smoking (P = 0.11) showed thicker SMT. Inconclusive data were obtained when correlating SMT and perforation rate, although it seems that thicker SMT might be more prone to perforation (P = 0.14).
Conclusions:
SMT is, on average, 1 mm in patients seeking sinus augmentation. Three-dimensional technologies overestimate approximately 2.5 times SMT when compared with histologic analysis. Periodontitis and smoking may result in thickening of the sinus membrane. However, current data were inconclusive to link SMT to the rate of membrane damage.
Insights
Schneiderian membrane thickness (SMT) averages 1 mm in patients undergoing sinus augmentation. While 3D imaging overestimates SMT, periodontitis and smoking may thicken it, though the link to perforation remains unclear.
Area of Science:
- Oral and Maxillofacial Surgery
- Regenerative Medicine
- Anatomy
Background:
- Schneiderian membrane thickness (SMT) is crucial for sinus augmentation success, as perforation can compromise outcomes.
- Understanding factors influencing SMT is vital for optimizing surgical procedures.
- This review investigates SMT, associated patient factors, and perforation risk.
Purpose of the Study:
- To determine the average Schneiderian membrane thickness (SMT).
- To identify patient-related factors affecting SMT.
- To explore the relationship between SMT and the rate of membrane perforation during sinus augmentation.
Main Methods:
- Systematic review and meta-analysis of 31 studies.
- Literature search across major databases (MEDLINE, EMBASE, Cochrane).
- Adherence to PRISMA and MECIR guidelines for rigorous methodology.
Main Results:
- Overall mean SMT is 1.17 ± 0.1 mm.
- Three-dimensional radiography (3DR) overestimates SMT compared to histology (1.33 mm vs. 0.48 mm), though not statistically significant.
- Periodontitis and smoking show a trend towards thicker SMT, but without statistical significance.
Conclusions:
- Average SMT is approximately 1 mm in patients requiring sinus augmentation.
- 3D imaging significantly overestimates SMT compared to histological analysis.
- While periodontitis and smoking may influence SMT, current evidence is insufficient to link SMT directly to membrane perforation rates.
