Dental anomalies Flashcards
Give the prevalence of hypodontia
3rd molars very common
first perm molars
Upper central incisors
more common permanent
Conditions ass with hypodontia
- Ectodermal dysplasia
- Down syndrome
- Cleft palate
- Hurlers syndrome
- Incontinentia pigmentii
Give some problems ass with hypodontia and give management options
- Abnorm shape or form
- Spacing
- Submergence
- deep overbite
- reduced LAFH
- Overdenture
- partial denture
- Composite
- Porcelain veneers
- Fixed prosthesis (crowns or bridges)
- Implants
Prevalence of hyperdontia/supernumary
1.5-3.5%
M>F
Max more com
Increased in cleidocranial dysplasia
Types of supernumary
Conical (cone shaped)
Tuberculate (barrel shaped , has tubercles)
Supplemental (tooth of normal series)
odontome (irreg mass dental hard tissue , compound or complex)
Most common cause delayed eruption perm incisors teeth
What is taurodontism?
- Enlargement of pulp chambers with furcation area displaced toward apex of root
What is Amelogenesis imperfecta and give the types?
- Congenital inherited disorder with abnormal formation of enamel unrelated to systemic conditions
Type 1 - Hypoplastic (enamel crystals don’t grow correct length)
Type 2 - Hypomineralised (Crystalites fail to grow in thickness and width)
Type 3 - Hypomaturational (Enamel crystals grow incompletely in thickness and width but normal length with incomplete mineralisation)
Mixed forms with taurodontism
Give the aetiology of Hard tissue defects (enamel hypo/hyper etc)
Localised
- Trauma
- Caries then abscess primary incisors
Generalised
- Environmental (flurosis or MIH ass with illness or chronological hypomin due liver or kidneyfailure)
- Hereditary (Amelogenesis imperfecta)
Give prenatal , neonatal and postnatal generalised environmental factors that can lead to enamel defects
Prenatal
- Rubella
- Congenital syphillis
- Thalidomide
- F-
- Cardiac and kidney disease
Neonatal
- Prematurity
- Meningitits
Postnatal
- Otitis media
- measles
- Chickenpox
- TB
- Pneumonia
- Long term health problem e.g. organ failure
Problems form Amelogenesis imperfecta
- Sensitivity
- Caries/ acid susceptibility
- Poor aesthetics
- Poor oral hygiene
- Delayed eruption
- Anterior open bite
txt options of Ameolgenesis Imperfecta
- Prevention!
- Comp veneers
- FS
- Metal onlays
- SSC
- Ortho
Name systemic disorderd ass with enamel defects
- Down’s syndrome
- Epidermolysis bullosa
- Prader - willi
Give reasons why there may be anomalies of dentine
- Dentinogensis imperfect (3types)
- Dentine dysplasia
- Odontodysplasia
- Systemic disturbance like metabolic nutritional or drugs
What is dentine dysplasia ass with?
- Normal crown morph, amber radiolucency, pulpal obliteration , short constructed roots
What is Odontogysplasia?
- Localised arrest in tooth development
- Thin layers of enamel and dentine
- Large pulp chambers
- AKA Ghost teeth
