Ortho Oracle - orthopaedic operative atlas

Osteogenesis Imperfecta

(see also: Pyknodyostosis) Discussion disease characterized by failure of maturation and organization of collagen fibers; defect in collagen (procollagen to type I collagen sequence and abnormal cross linking) leading to decreased collagen secretion, bone fragility; there may be an inability to form normal bone due to a defect in osteoblastic function; with the formation of … Read more

Osteoid Osteoma

– See: Bone Tumor Menu – Discussion:     – benign osseous tumor usually less than 1.5 cm in diameter, comprising 11% of all benign bone tumors;            – no cases of malignant transformation has been reported;     – occurs primarily in adolescents and less often in children;      … Read more

Osteochondroma / Osteocartilaginous Exostosis

    – Discussion:     – a developmental dysplasia of peripheral growth plate which forms a cartilage capped projection of bone found near metaphyses of long bones;           – peripheral chondroblast grows outward from the metaphysis, acting as an ectopic growth plate, which ceases growth at skeletal maturation;     … Read more

Osteoblastoma

– Bone Tumor Menu – Discussion:     – unusual benign osseous tumor;     – it resembles osteoid osteoma in some respects buts is larger ( >2 cm);     – unlike osteoid osteoma:            – occurs in older adolescents and young adults;            – osteoblastoma … Read more

Ortolani’s Test: for Congenital Hip Dislocation

– Discussion:     – early dx by postnatal screening w/ Ortolani or Barlow’s Test is essential to detect hip instability or dislocation;     – strictly interpreted, the Ortolani sign is the palpable sensation of the gliding of the femoral head in and out of the acetabulum;           – femoral … Read more

Orthopaedic Manifestations of Child Abuse

– Discussion:     – child abuse occurs most often under the age of 3 years;     – when child abuse goes unrecognized, the mortality rate may be as high as 5%;     – common patterns for abuse:            – unwitnessed spiral fractures            – fractures occuring prior to walking age;     – common fractures:            … Read more