We intend to review the UWHealth patient database to identify individuals with delayed or nonunion fractures. Subsequently, we will collect associated medical information related to fractures such as age of osteoporosis diagnosis, BMI, previous bisphosphonate treatment, type and location of fracture, time to complete union, other treatment needed for nonunion etc. With this information, we will evaluate the risk of delayed and nonunion fractures in patients previously receiving bisphosphonate treatment compared to a normal population. We also will investigate other potential causes of delayed or nonunion fractures in this population.