Dental abnormalities Flashcards
what happens when there’s an interruption in the developmental stage of a tooth
effects the tooth
- this can be due to genetic and or environmental factors
list the different stages of tooth development
- initiation
- proliferation
- histodifferentiation
- morphodifferentiation
- apposition
- calcification
- eruption
what happens if the laying down of matrix is interrupted?
enamel has missing sections or the calcification or maturation of the structure is interrupted = leads to a qualitative defect
in primary dentition when doe the incisor initial calcification in utero begin ?
3-4 months in utero
in primary dentition, when does the crown become completed ?
4 months after birth
in primary dentition, when doe the eruption of the lower incisors occur?
6 months of age
in primary dentition when does root completion occur?
18 months after eruption
in permanent dentition when do the first perm molars start to develop?
4 months in utero and calcifies at birth
in permanent dentition, when do the central incisors and lower lateral develop?
3-4 months of age
in permanent dentition, when do the upper laterals develop ?
10-12 months of age
summary calcification at birth
what are the 3 different types of classification anomalies ?
developmental
acquired
descriptive
what is a developmental anomaly?
- might have arisen from predetermined force eg. genetics, may have coded difference in their genes which ensure that th product of the coding was different from the norm which is either by mutation (denovo) of gene or gene passed form parent to child (more predictable)
what is an acquired anomaly ?
- influenced by environmental factors eg. trauma infection or chemicals
- tooth development is affected intrinsically by environmental factor interrupting genesis of the tooth (not extrinscly like caries)
why is a descriptive anomaly?
structure (layer)
number
size and shape (conical or tubucular)
eruption and exfoliation
colour ie staining
