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Maxillary sinus floor augmentation and dental implant placement using dentin matrix protein-1 gene-modified bone marrow stromal cells mixed with deproteinized boving bone: A comparative study in beagles



Maxillary sinus floor augmentation and dental implant placement using dentin matrix protein-1 gene-modified bone marrow stromal cells mixed with deproteinized boving bone: A comparative study in beagles



Archives of Oral Biology 64: 102-108



The aim of the study was to evaluate the effects of the combined use of dentin matrix protein-1 (DMP1) gene-modified bone marrow stromal cells (BMSCs) and Bio-Oss(®) for maxillary sinus floor augmentation (MSFA) implant placement in dogs. BMSCs were derived from bone marrow of six beagles and cultured. The cells were transduced with a lentiviral vector overexpressing the DMP1 gene and enhanced green fluorescent protein (EGFP) gene (Lenti-DMP1/EGFP) in test group, and with a lentiviral vector encoding EGFP gene (Lenti-EGFP) in control group. Six dogs received sinus augmentations using the bilateral approach with a simultaneous implant placement at each site respectively. At the same concentration, 2×10(7) cells/ml, one sinus was grafted using a mixture of autologous DMP1/EGFP gene-modified BMSCs and Bio-Oss(®) (DMP1 group), and the contralateral sinus was grafted with autologous EGFP gene-modified bMSCs and Bio-Oss(®) (EGFP group). After a 3 month healing period, bone regeneration and osseointegration were evaluated using histologic and histomorphometric methods. The bone-implant contact (BIC) and the bone area fraction in the DMP1 group (BIC: 34.67%±8.23%, bone area fraction: 35.16%±3.32%) were significantly greater compared with the EGFP group (BIC: 26.06%±5.16%, bone area fraction: 20.74%±1.63%) (P<0.05). No significant difference between the residual bone substitute material volume (BSMV) in the DMP1 group (35.86±7.35) and the EGFP group (32.16±9.16) was found in our study (P>0.05). BMSCs modified with the DMP1 gene can be used as an adjunct to Bio-Oss(®) to enhance new bone formation and the osseointegration of dental implants in MSFA of dogs.

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Accession: 058276038

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PMID: 26826470

DOI: 10.1016/j.archoralbio.2016.01.004


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