Week 13- Bone disorders Flashcards
What is dysplasia?
Presence of abnormal cells
What are different types (headings) of bone disorders?
- Inflammatory bone diseases
- Cystic lesions
- Reparative lesions of bone
- Nutritional Iatrogenic
- Dystrophic bone diseases
- Developmental
- Hormonal
- Hereditary bone diseases
- Idiopathic
- Tumours
What are characteristics of actinomyces?
- In between bacteria and fungus
- Can be associated with dental infections
- Seen in third world
What questions do we need to ask for pt with disorder of bone?
- What is it?
- What causes it?
- How do pts present/how do we find it?
- How do we establish diagnosis?
What are the disorder headings for periodontal disease?
- Infective
- Inflammatory
- Bone resorption
What is this?
Stafne’s bone cavity- below the IAN canal and bilateral.
How do we classify bone disorders on radiograph?
- Anatomic
- Artifact
- Pathologic
How is radiographic appearance of bone described?
- Radiopaque/radiolucent
- Unilocular/multilocular
How are disorders of bone diagnosed?
- Radiographic appearance
- History
- Exam
- Imaging
- Histopathology
What is Paget disease of bone (osteitis derformans)?
- Dystrophic condition
- More common in long bones but can happen in facial bone
- 2 phases- resorptive phase, osteosclerotic phase (increased bone mass, disordered)
- Can get heart failure
- 4% progress to sarcoma
Reversal lines
What are characteristics of osteopetrosis?
- Bones are abnormally dense and prone to breakage
- Loss of cortical definition
- Dense calvaris
- May present with hearing loss and sensory problems
What is cleidocranial dysplasia?
- Developmental condition
- Autosomal dominant
- Effects bone undergoing intramembranous ossification
- Dental abnormalities
- Sinusitis
- Mild developmental delays
- Hypertelorism
- No metopic suture
What are characteristics of fibrous dysplasia?
- Bone replaced by fibrous tissue
- Affects craniofacial bones
- Painless enlargement- stops after adolescent
- Genetic anomalies
- Can associated with cutaneous/endocrine syndomes
What is this?
Fibrous dysplasia
What is osteomyelitis?
- Inflammation of bone
- +/- infection
- Can be acute/chronic, suppurative or not
- Can be pus
What is happening in this image and tx?
Osteomyelitis
- Inferior border of right mandible- expansion.
- Pathological
- Well defined
- Calcification within it surrounded by radiolucency
- Dead primary teeth with chronic infection that has spread to bone marrow
- Tx: excision of bone sequestrum
What is this?
Osteomyelitis
What is this?
MRONJ
- Hard, yellow, exposed bone
- Iatrogenic
What is happening in this radiograph?
Osteosarcoma OR may be old fractured md that did not receive tx
- Loss of continuity of LHS md
- Irregular replacement of proximal and distal ends
- Lysis extending into bony stumps
