The most common and mildest form of OI, characterized by the body producing normal collagen, but not enough required for strong bones. People with this form will have little or no bone deformity, but will be more prone to fractures. Also, the strength of teeth can be affected, and the whites of the eyes can appear to have a blue, purple or grey tint.
The most severe form of OI. Affecting the formation of normal collagen formation, bones can break as easily even as early as in the womb. Many infants with this form of OI will not survive past infancy.
A severe form of OI also caused by improperly formed collagen, it will often be characterized by severe deformities along with additional complications. People with Type III often are born with fractures, have a blue, purple, or grey tint to the whites of the eyes along with spinal deformitites, respiratory complications, and brittle teeth.
A moderately severe form of OI also caused by improperly formed collagen. Bone deformities will be mild to moderate, and people will be more prone to bone fractures and brittle teeth. The whites of the eyes will be normal, and some people will be shorter than average.