When someone has this disease, their bones are more likely to break. Unfortunately, osteogenesis imperfecta has no cure. This disease is categorized in four types: Type one is the most common case and it often causes brittle teeth and bone related injuries. Type two is a more severe version of type one and has most of the same symptoms just in more severe cases. People with type three of osteogenesis imperfecta may have more than 100 fractures before puberty. Their eyes often develop a purple, blue, or grey tint and people with this case also often have hearing loss. 50% of people that have osteogenesis imperfecta have hearing loss while becoming an adult. Type 4 is a more severe case of most symptoms stated above.