Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the genetic changes related to dentinogenesis imperfecta ?
    ### Response:
    Mutations in the DSPP gene have been identified in people with dentinogenesis imperfecta type II and type III. Mutations in this gene are also responsible for dentin dysplasia type II. Dentinogenesis imperfecta type I occurs as part of osteogenesis imperfecta, which is caused by mutations in one of several other genes (most often the COL1A1 or COL1A2 genes).
    