Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Osteogenesis Imperfecta ?
    ### Response:
    Osteogenesis imperfecta (OI) is a genetic disorder in which bones break easily. Sometimes the bones break for no known reason. OI can also cause weak muscles, brittle teeth, a curved spine, and hearing loss. OI is caused by one of several genes that aren't working properly.
    