Shortened Dental Arch Flashcards
what is the shortened dental arch concept
the patient has satisfactory oral function without use of RPD for posterior teeth
priority is given to maintaining anterior and premolar dentition
how many units are needed for a patient to have sufficient adaptive capacity
3-5 occlusal units
what issues can arise from having loss of molars
reduced mastication
mandibular displacement
alterations in food selection
aesthetic issues
loss of occlusal stability
TMJ problems
how many teeth should be the goal for oral health according to WHO
20
what are the indications for shortened dental arch
missing posterior teeth with 3-5 occlusal units remaining
sufficient occlusal contacts to provide a large enough occlusal table
favourable prognosis for remaining anterior and premolar teeth
patient not motivated to purse complex treatment plan
limited financial resources
what are the contraindications for shortened dental arch
poor prognosis of remaining dentition
untreated or advanced perio disease
pre-existing TMJD
signs of pathological tooth wear
patient has significant malocclusion
what should be taken into consideration when treatment planning for SDA
chewing problems
appearance concerns
discomfort
occlusal instability
if a patient fails to establish periodontal health what negative consequences are there in the long run
drifting of periodontally compromised teeth under occlusal load
loss of alveolar bone leading to compromised denture bearing area
loss of space for denture teeth in long term
what does distal tooth migration cause
increased anterior load
increased number and quantity of anterior occlusal contacts
increased interdental spacing
why is progressive wear a contraindication to SDA
gradual loss of occluding contacts and occlusal stability
what happens if stabilising occluding contacts fail
unplanned tooth loss may result
loss of occlusal stability
what are the 5 requirements for occlusal stability
stable contacts on all teeth of equal intensive in centric relation
anterior guidance in harmony with envelope of function
disclusion of all posterior teeth during protrusive movement
disclusion of all posterior teeth during lateral movement (non-working side)
disclusion of all posterior teeth during lateral movement (working side)
what is occlusal stability determined by
absence of pathology
periodontal support
number of teeth in arches
interdental spacing
occlusal contacts
mandibular stability
what manifestations can a traumatic occlusion have
fracture of restorations
tooth mobility
dental pain
tooth wear
TMJD
how can you extend an SDA
resin retained bridge
conventional bridge
implants
RPD
