Fractures & Bone Conditions Flashcards
Bone formation
Osteoblasts
Matured Osteoblasts
Osteocytes
Bone resorption
Osteoclasts
Enchondral Dev’t Process
Hyaline Cartilage -> Invaded by blood vessels -> Replaced by bone
Membranous Dev’t Process
Osteoid matrix -> Calcifies -> Bone
Example of Enchondral bones
Sternum
Ribs
Scapulae
Spine
Pelvis
Long bones
Example of Membranous bones
Cranial Vault
Facial bones
BMD is influenced by:
Hormonal status
Dietary intake
Weight bearing activities
Peak of bone mass
1st 3 decades of life (35 y/o)
Pathophysiology of Osteoporosis
Reduced Osteoblastic activity
Increased Osteoclastic activity
MC area of fx in Osteoporosis
Midthoracic
Upper lumbar
Hip
Distal forearm
Modifiable Risk Factors (Osteoporosis)
Smoking
Alcoholism
Low Calcium intake
Early Pregnancy
Sedentary Lifestyle
Caffeine intake
Anorexia
Medication
Early Menarche
MC prescribed tx in Osteoporosis
Estrogen Therapy
MC form of short limb Dwarfism
Achondroplasia
Echondral Osteogenesis is retarded and ceased early
Achondroplasia
Characteristics of Achondroplasia
Brachycephalic
Small Face
Broad Forehead
Flat Nose
Prominent Jaw
Short Stature (4ft), Arms & Legs
Main en Trident
Bowing of Femur & Tibia
Milder form of Achondroplasia
Almost normal face & cranium
Hypochondroplasia
Normal Face & Cranium with short stature
Not obvious at birth (2 y/o)
Pseudoachondroplasia
Changes in Metaphysis that is similar to Rickets
Metaphyseal chondroplasia
Chondroectodermal Dysplasia AKA
Ellis-Van Creveld Syndrome
Chondroectodermal Dysplasia Manifestations
Polydactyly
Dysplastic Fingernails
Chondrodysplasia Punctata AKA
Stippled Epiphyses
Irregularly stippled calcification in epiphysis
Chondrodysplasia Punctata or Stippled Epiphyses
Facial Features seen in Chondrodysplasia Punctata
Mongoloid Facie
Diastrophic Dwarfism Manifestations
External ear deformity
Club foot
Kyphoscoliosis
Hitchhiker’s Thumb
Regions of increased bone mass
Osteosclerosis
Marble bone
Osteopetrosis
Osteropetrosis (X-ray)
(+) Celery stalk (bone within bone appearance)
Spotted bone
Osteopoikilosis
Muscle and fascia transform into immobile structures
Progressive Myositis Ossificans
Progressive Diaphyseal Dysplasia AKA
Engelmann’s Disease
Bone Disorders (Autosomal Dominant)
Marble bone (Osteopetrosis)
Achondroplasia
Spotted bone (Osteopoikilosis)
Hypochondroplasia
Progressive Diaphyseal Dysplasia (Engelmann’s Dse)
Progressive Myositis Ossificans
Bone Disorders (Autosomal Recessive)
Diastrophic Dwarfism
Ellis-Van Creveld Syndrome (Chondroectodermal Dysplasia)
Bone Disorders (Both Autosomal Dominant & Recessive)
Metaphyseal Chondrodysplasia
Chondrodysplasia Punctata (Stippled Epiphyses)
Subchondral Calcification d/t lack of Vit D in infants/children
Rickets
Characteristics of Rickets
Coxa Vara
Bow leg
Scoliosis
Delayed closure of Fontanels
Adult Rickets
Osteomalacia
Lack of Vit C
Scurvy
Skeletal overgrowth
Hyperpituitarism (GIgantism)
Decreased production of growth hormone
Hypopituitary Dwarfism
Paget’s Disease AKA
Osteitis Deformans
Characteristics of Paget’s Disease
Thickening of cranium
Thickening & bowing of long bones
Kyphosis
Stages of Bone Healing
Hematoma
Soft Callus
Hard Callus
Remodeling
Bone Healing Time in Children
4-6 weeks
Bone Healing Time in Adolescents
6-8 weeks
Bone Healing Time in Adults
10-18 weeks
Common Sites of Delayed Union
Tibia (20 weeks)
Femur (20 weeks)
Humerus (10 weeks)
Classifies injuries of the Growth plate
Salter-Harris Classification
Salter-Harris Classification I
Cartilage plate (Superficial)
Salter-Harris Classification II
Growth plate and Metaphysis (Above)
Salter-Harris Classification III
Epiphysis and Cartilage plate (Lower)
Salter-Harris Classification IV
Epiphysis, Growth plate, Metaphysis (Through)
Salter-Harris Classification V
Crushed growth plate (Erased)
Garden Classification I
Incomplete femoral neck fx
Garden Classification II
Complete undisplaced femoral neck fx
Garden Classification III
Complete partially displaced femoral neck fx
Garden Classification IV
Complete fully displaced femoral neck fx
Le Fort Classification Type 1
Palate is separated from superior maxilla
Le Fort Classification Type 2
Nasal bones, midportion of face & maxilla move
Le Fort Classification Type 3
Middle of 3rd of face separates from upper 3rd of face
Craniofacial separation