Can Mesenchymal Stem Cells Improve Bone Regeneration in Maxillary Sinus Augmentation? A Systematic Review and...

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Oral and Maxillofacial Surgery

Background:

• Mesenchymal stem cells (MSCs) show preclinical promise for bone regeneration around dental implants.
• Clinical data on MSC efficacy in maxillary sinus augmentation for dental implants is limited and inconclusive.

Purpose of the Study:

• To systematically evaluate the clinical effectiveness of MSC-based regenerative therapies versus conventional grafting in maxillary sinus augmentation for dental implant placement.

Main Methods:

• A systematic review and meta-analysis adhering to PRISMA 2020 guidelines.
• Included six randomized clinical trials (RCTs) comparing MSCs to control groups.
• Assessed risk of bias using Cochrane RoB 2.0 and certainty of evidence with GRADE methodology.

Main Results:

• No significant difference in implant success rates between MSC and control groups (RR=0.98; 95% CI: 0.94-1.03).
• Conventional grafting showed a statistically significant advantage in bone neoformation (SMD=-0.83; 95% CI: -1.37 to -0.30).
• High certainty of evidence for bone formation outcomes; moderate for implant success.

Conclusions:

• MSC-based therapies do not currently offer a significant clinical advantage over conventional grafting for maxillary sinus augmentation.
• Limited trials and heterogeneity necessitate cautious interpretation.
• Further high-quality studies are required to validate MSC efficacy in implant-related bone regeneration.