P066 Orthopedic complications of osteogenesis imperfecta
Abstract Background Osteogenesis imperfecta (OI) is an inherited connective tissue disorder including various skeletal manifestations. Bone fragility, vertebral body malformation and length lower limbs inequality are often responsible for orthopedic complications. The aim of our study was to determine orthopedic complications of OI and to specify management modalities in rheumatology. Methods We conduct a retrospective study based on the files of children referred to the rheumatology departement over the last 15 years, for treatment of OI. The evaluation was clinical and radiological. Clinical examination included joint and spine assessment. An X-ray of the spine and painful joints associated with a quantitative densitometry were requested. Results Five patients were collected, their mean age was 9 years. All patients had peripheral fracture. Joint assessment revealed a flessum of the elbow and a reduction of the motion of hip in 40% of cases. Scoliosis was noted also in 40% of cases. The average of spine Z –score was -3, 4. All children had benefited from oral calcium and vitamin D supplementation associated with cyclic intravenous bisphosphonates and an adapted rehabilitation protocol. Surgical management was often needed in 2 cases. Discussion and Conclusion Orthopedic complications during OI are essentially the consequence of lower bone mineral density which would cause peripheral or vertebral fracture. Indeed, some other factors like length inequality, pelvic obliquity, ligamentous laxity and inter-vertebral disc abnormalities could be involved in scoliotic progression. The management of these skeletal complications must be early and multidisciplinary in order to improve the prognosis and the quality of life of the patient