seminar notes Flashcards
if a crossbite has associated displacement what is the likely aetiology
dental aetiology
if skeletal discrepancy likely wont displace but asymmetry may be present
how does digit sucking result in uni lateral crossbite or small maxillary arch
when sucking digits tongue depresses so buccinator and masseter forces left unopposed , this is paired with negative intra oral pressure from sucking motion
will dummies affect permanent dentition
no as almost always stopped by 4/5 years old
what appliances may be given to stop a digit sucking habit
removable appliance - wth goal post
fixed appliance - with tongue rake
name 3 potential aetiologies of an anterior open bite
tongue thrust
digit sucking
skeletal pattern
what age does the mid palatal suture close
around age 14 (think RME)
what permament teeth would a 9 year old typically have
all 1st molars
all upper and lower incisors
do you need to compensate deciduous teeth extractions
no - none
extraction of what tooth may require a balancing extraction
Cs
what should be done if a child with hypodontia comes into your practice
refer
name 3 potential reasons for a midline diastema
unerupted supernumerary
hypodontia
generalised spacing
arch - toothsize discrepancy
dens in dente
invagination of pulp
as soon as tooth erupts will be communication between oral cavity and pulp - poor prognosis tooth
what two radiograph combinations can be done for parallax
horizontal - 2 PAs
vertical - OPT and maxillary occlusal
aetiology of unerupted canines (4)
- long path of eruption
- genetic links
- crowding
- ectopic position of tooth germ
when should ectopic canines be surgically removed
- no suitable path of traction to bring it into arch
- signs of early damage to lateral incisor
- patient doesnt want active treatment
- good long term prognosis of Cs (if retained)
- 2 and 4 contact present
