RT Journal Article T1 Regeneration of periodontal bone defects with mesenchymal stem cells in animal models. Systematic review and meta-analysis A1 Velasquez Ron, Byron Vinicio A1 Chauca Bajaña, Luis Alberto A1 Tomás Carmona, Inmaculada A1 Camacho-Alonso, Fabio A1 Pérez-Sayáns García, Mario A1 Pérez Jardón, Alba K1 Stem cells K1 Pluripotent stem cells K1 Periodontal defect K1 Periodontal regeneration AB The aim of this study was to evaluate the efficacy of mesenchymal stem cells (MSCs) in the regeneration of periodontal bone defects in animal models. A systematic review and meta-analysis were conducted following the PRISMA guidelines, and the study was recorded in PROSPERO under reference number CDR42021247462. The PICO question was: is periodontal regeneration (cementum, periodontal ligament and alveolar bone) with MSCs more effective than other techniques? Three groups were considered: Group 1: MSCs alone or mixed with regenerative materials. Group 2: only regenerative materials. Group 3: no regenerative material nor MSCs. The search was conducted using MeSH with a total of 18 articles for qualitative analysis and 5 for quantitative analysis. For the meta-analysis, a modification of the effect size algorithm was developed, which considered a comparison of means between treatments using the Student's t sample distribution. When comparing the effect size between Group 1 and Group 2, the effect size for the new cementum was 2.83 mm with an estimated confidence interval of 95% (CI 95%) between 0.48 and 5.17 mm. When considering the fit to a random-effects model, the combined variance (τ2) was 6.1573 mm, with a standard deviation (SD) of 5.6008 mm and a percentage of total heterogeneity I2 of 92.33% (p < 0.0001). For new bone, the effect size was 0.88 mm, CI 95% − 0.25 to 2.01 mm, τ2 = 1.3108 mm (SD = 1.2021 mm) and I2 = 80.46%, p = 0.0004). With regard to the new periodontal ligament, it was not possible for the meta-analysis to be performed. MSCs have a greater capacity for tissue regeneration in root cementum than in alveolar bone compared to other regenerative materials PB Springer SN 1618-1247 YR 2022 FD 2022 LK http://hdl.handle.net/10347/29193 UL http://hdl.handle.net/10347/29193 LA eng NO Odontology (2022). https://doi.org/10.1007/s10266-022-00725-5 NO Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. This study was partly funded by a pre-doctoral grant (on a competitive basis) from the Health Research Institute of Santiago de Compostela that was awarded to Alba Pérez Jardón (IDIS2020/PREDOC/03) DS Minerva RD 28 abr 2026