Dental Development/Morphology/Occlusion Flashcards
- An issue in HISTODIFFERENTIATION during tooth development would cause what type of anomaly?
- At what morphologic stages would HISTODIFFERENTIATION occur?
- What are some examples of anomalies due to issues during this stage?
- create anomalies in the structure of dentin and enamel
- Cap and Bell stages (both early and advanced)
- AI type 1 (hypoplastic); AI type 4 (hypoplastic and hypomaturation); DI
- An issue in PROLIFERATION during tooth development would cause what type of anomaly?
- At what morphologic stages would proliferation occur?
- What are some examples of anomalies due to issues during this stage?
- number of teeth and structure of teeth
- in all 3 (bud, cap, and both bell stages)
- hypodontia; hyperdontia, oligodontia, epithelial rests
- An issue in MORPHODIFFERENTIATION during tooth development would cause what type of anomaly?
- At what morphologic stages would MORPHODIFFERENTIATION occur?
- What are some examples of anomalies due to issues during this stage?
- size and shape of teeth
- in all 3 (bud, cap, and both bell stages)
- microdontia, pg lateral, mulberry molars, hutchinson incisors, absence of cusp/root; macrodontia, tuberculated cusps, cusp of Carabelli, taurodontism, dens in dente, dens evaginatus, dilaceration, gemination, fusion, concrescence
If a patient has AI type 2, at what point in the histophysiologic stage did an issue arise?
AI type 1?
AI type 4?
AI type 3?
AI type 2–> during apposition and during mineralization
AI type 4–> during apposition, during mineralization, and during histodifferentiation
AI type 1–>during histodifferentiation
AI type 3–> during maturation
AI type 1 is hypoplastic
AI type 2 is hypomaturation
AI type 3 is hypocalcification
AI type 4 is both hypoplastic and hypomaturation
What syndromes are associated with hyperdontia?
- Down Syndrome
- Sturge Weber Syndrome
- Cleidocranial dysplasia
- Crouzon Syndrome
- Apert syndrome
- CLP
- Orofaciodigital syndrome type 1
- Gardner syndrome
What syndromes are associated with missing teeth?
- ectodermal dysplasia
- Crouzon syndrome
- Achondroplasia
- Ellis-van Creveld (chondroeectodermal dysplasia)
- Williams syndrome
- incontinentia pigmenti
- orofaciodigital type 1
- Rieger syndrome
- non-syndromic CLP
What syndromes are associated with microdontia?
- Ectodermal dysplasia
- Crouzon syndrome
- Down syndrome
- Hemifacial microsomia
- Ellis-van Creveld (chondroectodermal dysplasia)
- pituitary dwarfism
What syndromes are associated with macrodontia?
- hemifacial hyperplasia/hypertrophy
- Crouzon syndrome
- Otodental syndrome
- XYY syndrome
- pituitary gigantism
- pineal hyperplasia with hyperinsulinism
What is the most common type of hyperdontia? In which sex? In which area of the mouth?
MC in males in max anterior; with MC type being MESIODENS
Which teeth are most commonly missing? And which sex is it more common in?
More common for females to have missing teeth.
3rd molars>mand 2nd pre>max laterals>max 2nd pre
Which teeth are most commonly associated with microdontia?
max laterals, 2nd premolars, 3rd molars
what is dens invaginatus vs dens evaginatus?
dens invaginatus is Dens in dente – tooth within a tooth
dens evaginatus is talon cusps
Which teeth are most commonly associated with dens in dente and how does that occur?
MC dens invaginatus: max laterals
–IEE invageinates
tx: seal or composite resto
if deepr lesion, may need IPC/DPC, RCT
Which teeth are most commonly associated with dens evaginatus and how does that occur?
talon cusps are mostly associated with maxillary incisors>lateral incisors; 77% are permanent teeth
occurs with the evagination of the IEE
Characteristics of AI type 1
- hypoplastic type
- insufficient quantity of enamel with lack of complete IEE
- BOTH dentitions affected
- MC type vs types 2,3,4
- 44% have long lower face causing anterior open bite
