Hypodontia Flashcards
what does hypodontia mean
congenital absence of one or more teeth
what does anodontia mean
complete absence of teeth
what does severe hypodontia mean
6 or more congenitally absent teeth
what teeth are most affected by hypodontia
lower 5s
upper 2s
upper 5s
lower incisors
what other orthodontic condition is hypodontia associated with
ectopic canines
what is the aetiology of non-syndromic hypodontia
mutations in at least 3 genes associated with missing teeth
familial
sporadic
what is the aetiology of syndromic hypodontia
cleft lip and palate
anhidrotic ectodermal dysplasia
what is the aetiology of environmental hypodontia
trauma
radiotherapy/chemotherapy
what is the presentation of hypodontia
delayed or asymmetric eruption
retained or infra-occluded deciduous teeth
absent deciduous tooth
tooth form
what are the associated problems with hypodontia
microdontia
malformation of other teeth
short root anomaly
impaction
delayed formation and/or delayed eruption other teeth
crowding and/or malposition of other teeth
maxillary canine/first premolar transposition
taurodontism
enamel hypoplasia
altered craniofacial growth
what are the potential problems with hypodontia
spacing
drifting
over-eruption
aesthetic impairment
functional problems
what is the hypodontia care pathway
recognised by GDP
refer to specialist orthodontist
GDH hypodontia clinic
what is included in the assessment and planning of hypodontia
history
extra-oral examination
intra-oral examination
investigations
problem list
definitive plan
retention/maintenance
what investigations are used in hypodontia
study models
planning models
radiographs
photographs
CBCT
what are the management options for missing upper laterals
accept
restorative alone
orthodontics alone
combined orthodontic and restorative treatment
what restorative treatment can you get for missing upper laterals if the space is open
partial denture
implant
resin bonded bridge
conventional bridge
auto-transplantation
what is the ideal plan for hypodontia treatment
satisfies expected aesthetic objectives
least invasive
satisfies expected functional objectives
what is the best abutment tooth for a resin bonded bridge
canine
what are the advantages of a resin bonded bridge
relatively simple
do when young
non-destructive
can look good
place on semi-permanent basis
what are the disadvantages of a resin bonded bridge
failure rate
appearance sometimes not good
orthodontic retention needs are high
what are the keys to successful management of hypodontia
inter-disciplinary team
joint assessment and treatment planning with precise aims
joint collaboration at transitional stages of treatment
follow up of treated cases
