Dental Anomalies Flashcards
What can dental anomalies be categorized into
number
size/shape
structure
eruption & exfoliation
What are the dental anomalies affecting number
hypodontia
hyperdontia
hypodontia
What is the most common tooth to be missing
mandibular premolar
maxillary lateral incisor
hypodontia
What is the least common tooth to be missing
first permanent molar
upper central incisors
What is the prevalence of hypodontia
3.5-6.5%
What are the conditions associated with hypodontia
- Ectodermal dysplasia
- Down syndrome
- Cleft palate
- Hurler’s syndrome
- Incontinentia pigmentii
What are the aims of treamtent for hypodontia
prevention
restore function and aesthetics
What are the problems experienced by those who have hypodontia
- Abnormal shape/form of present teeth (cone shaped/straight sided small teeth)
- Spacing
- Submergence/infraocclusion of primary teeth
- Deep overbite
- Reduced lower face height
What are solutions for the problems experienced by those who have hypodontia
- Overdenture
- Partial denture
- Composite
- Porcelain veneers
- Fixed prosthesis
- implants
What is the chronology of dental management for hypodontia
- Diagnosis
- Removable prosthesis (while awaiting definitive tx)
- Orthodontics (to make restorative treatment easier)
- Composite buildups to improve shape and size of present teeth
- Porcelain veneers
- Crowns/bridges
- Preventative treatment (all the way through as we cannot afford to lose more teeth)
hypodontia
Why do we wait until a patient is in their 20s for veneers
prior to this, gingival margin moves position
What is hyperdontia aka
supernumerary
What is the prevelance of supernumerary teeth
1.5-3.5%
What jaw is hyperdontia more common in
maxilla
What condition is there higher frequency of hyperdontia
cleidocranial dysplasia
What are the 4 types of supernumerary
- conical
- tuberculate
- supplemental
- odontome
Describe a conical supernumerary
cone shaped
Describe a tuberculate supernumerary
barrel shaped
has tubercles
Describe a supplemental supernumerary
looks like a tooth of a normal series
lateral incisor most common
remove the lateral incisor which is hardest to position correctly
Describe odontome supernumerary
irregular mass of dental hard tissue
can be compound or complex
What is complex odontome
o Complex is when the calcified dental tissues are simply arranged in an irregular mass bearing no morphologic similarity to rudimentary teeth
What is compound odontome
o Compound is when the dental tissues are arranged in a more oderly pattern than complex
What is the most common cause of delayed eruption of the permanent incisor teeth
supernumerary
What are dental anomalies affecting size/shape
- microdontia
- macrodontia
- double teeth
- odontomes
- taurodontism
- dilaceration
- accessory cusps
- dens in dente