Hypodontia Flashcards
What is hypodontia
congenital absence of 1 or more teeth
What is anodontia
complete absence of teeth
What is severe hypodontia
congenital absence of 6 or more teeth
What is missing upper laterals associated with
ectopic canines
Non-syndromic causes of hypodontia
mutations in at least 3 genes associated with missing teeth
Familial
Sporadic
Syndromic causes of hypodontia
e.g. cleft lip and palate, anhydrotic ectodermal dysplasia
Environmental causes of hypodontia
trauma
radiotherapy/chemotherapy
Presentation of hypodontia
delayed/assymetric eruption
retained/infra-occluded/absent deciduous teeth
tooth form
hypodontia associated problems
microdontia/malformation of other teeth
short root anomaly
impaction
enamel hypoplasia
taurodontism
potential problems with hypodontia
spacing
drifting
over-eruption
aesthetics
Functional problems
hypodontia care pathway
GDP recognition
refer to ortho specialist
in GDH- allocate to hypodontia clinic
Hypodontia investigations
Study/planning models
Radiographs
Photographs
Cone beam CT
Management options for space open- missing upper laterals
RBB
Implants
RPD
Conventional bridgework
Autotransplantation
What is the ideal abutment tooth for RBB and why
Canine- root length, crown dimensions, less shine through
Advantages of RBB
Minimal/no tooth prep
No LA
cheaper
Less surgery time
Can be used as provisionals
Less destructive if fails
Relatively simple
do when young
non-destructive
looks good
place on semi-permanent basis
