W13 - Disorders of Bone - Curtin Flashcards
What is actinomyces (relevance, where is it seen)
- Commonly seen in third world / remote
- Associated with dental infections
- “in btw bacteria and fungus”
How to differentiate hypercementosis from cementosseous lesions
Hypercementosis has PDL radiolucency
Cementosseous blends
Stafnes bone cavity
- Bilateral
- Below the IAN canal
Features of Pagets disease of bone
aka Osteitis Deformans
Two phases
- Resorptive phase / osteoclastic
- Osteosclerotic phase (incr mass, disordered)
Most commonly in long bones but can occur in maxilla and zygoma
Features of osteopetrosis
- Loss of coritical definition
- Dense calvaris
- May present with hearing and vestibular issues
- Sensory problems
What is fibrous dysplasia? (3)
Bone gets replaced by fibrous tissue
- Affects craniofacial bones
- Painless enlargement / swelling
- Ends around puberty
Define osteomyelitis (what is it described as?)
Inflammation of the bone
- possible extrusion of pus
- Described as: acute/chronic, suppurative
- Usually due to infection
ID + describe + tx
osteomyelitis
Inferior border of RHS mandible expansion
- pathological
- calcifications within it surrounded by radiolucency
- Infection is within marrow of bone
Tx: excision of bone sequestrum
How can inflammatory bone disorders come from sterile bone?
Sterile bone inflammation
- Rare
- Autoinflammatory bone disorders
- Ex/ Chronic recurrent multifocal osteomyelitis
- Skin +/- gut disorders
- Origin of problem most likely from gut not bone
What are some examples of nutritional / metabolic / endocrine bone disorders
- Osteomalacia → mineral def or Rickets
- Post menopausal osteoporosis
- Hyperparathyroidism / acromegaly
2 neoplastic disorders of bone
Osteosarcoma
Chondrosarcoma
How does chondrosarcomas appear on radiograph
They dont → radiolucent
chondro = cartilage
not osseous enough to be radiopaque
Osteosarcoma
*this is also how untreated broken jaw will look like
Osteosarcoma
- “sunray” appearance of bone spicules
What are some categories of bone disorders
Inflammatory bone diseases
Cystic lesions
Reparative lesions of bone
Nutritional
Iatrogenic
Developmental
Hormonal
Heriditary
OSteomyelitis
