The present invention features methods for promoting the differentiation of osteoblast bone forming cells to a mineralization phenotype and increasing bone mass using inhibitors of Brahma. Subjects benefiting from such treatment may have non-union fractures, osteopenia or osteoporosis, osteosarcoma, or a bone graft or bone fusion or orthopedic and dental implants, osteolytic bone disease, skeletal defects or deficiencies or periodontal disease.