1 Flashcards
what are the 6 points detailed on Posselt’s envelope of movement
Protrusion
Edge to Edge
Intercuspal position
Retruded contact position
Retruded axis position
Translation - full
what is the average amount of freeway space
2-4mm
what is a mandibular border movement
reproducible extremities of mandibular movements
detailed on posselts envelope
why is the retruded axis position important in clinical dentistry
reproducible jaw position
helps identify terminal hinge axis
what is the bennet angle and what is its average value
Bennet angle is angle formed between saggittal plane and path of non working condyle during lateral mandibular movements when viewed in the horizontal plane
average value is 15 degrees
what is the average condylar guidance angle
30 degrees
in what percentage of patients is RCP and ICP the same
10%
true combined perio endo lesion
perio and endo lesion both develop independently and progress concurrently and will eventually meet and merge
anatomical factors that may influence pus discharge location
discharge will follow route of least resistance
may be influenced by
- density of bone
- muscle attachments
- tight connective tissue attachment
attrition
dental wear caused by tooth to tooth contacts
ideal end point of obturation
1-2mm short of tooth apex
working length
distance from coronal reference point to the point at which canal preparation and obturation should end
what size must a file be for it to be seen on a radiograph
at least 15 gauge
features of necrotising gingivitis
halitosis
necrosis of interdental papilla
lymphadenopathy
malaise
pain
spontaneously bleeding gums
(rapid onset of symptoms)
risk factors for necrotising gingivitis
smoking
stress
malnourishment
HIV
