Age 3 - Dental Tissues Flashcards
what si ageing
changes brith to death hangs in life
what si he vitality of enamel
non vial - no active changes
ameloblasts gone only passive them and c
wat are some mech surface changes in enamel
attrition - incised/occlusal
approximal wear - arch shortens
what are acquired lamellae
crack forms in life of tooth
what si the ionic exchange in the enamel
fluoride
exchange F with OH in lattice
more perfect struct
more resist acid dean
what is th evitlity of pulp
vital tissue and has acute responses to enviro stim
what is secondary dentine
les tubular with age
reduces pulp chamber
what is sclerosis of the root
translucent dentine infilling tubules starts apically linked to age fracture resist
what happens to pulp with age
decrease pulp volume
- dec vasc
- dec nerves dec sensitivity
- decundiff and odontoblast cells
with less undiff cells what does this mean
less potential for pulp to repsond
what can be seen in result of age in pulp
calcification
true pulp stones -tubular structure form odontoblast like cells
false pulp stones - calcified fibrous tissue
what happens to cementum with age
thickness increases up to 3X between ages 16-70
what can the thickness if the cementum lead to
can obstruct and obstruct apical foramen
compensates for wear
what happens to the peirodontium in age
not an age change but more assc vasc changes - thicken vessel walls and narrow lumen loss cellularity increasing fibrosis PDL fibres bundles thicker
what happens to bone in age
less dense cortisol mass dec more brittle less vasc some osteoporosis slower wound heal
