Slidepath Work Flashcards
What are enamel tufts and enamel lamellae?
The ADJ is the interface of the enamel and the underlying dentin. … Lamellae are linear enamel defects that extend from the surface of the enamel towards the ADJ, or vice versa. Enamel tufts are “small, branching defects that are found only at the ADJ, protruding into the enamel towards the enamel surface.
What are enamel spindles?
An odontoblastic process that extends in between cells of inner dental epithelium before the formation of enamel.
Where is cementum thickest?
Apex of root and in furcation areas.
Where is the periodontal ligament situated in cementum and bone?
C- located apically
B- located cervically on bone.
This is to distribute forces to bone in a balanced way.
What dental tissue is first affected in periodontal disease?
-Gingival fibres.
What is the calculation to determine pressure?
Pressure= force/area
Where will you find trabecular bone in the cortisol plate?
Trabecular bone passes through gaps in inner cortisol plate of alveolar bone.
What jaw bone is the most dense and how does this effect implant placement?
The upper contains more spongy bone than the lower. The lower is more dense and compact- implants work better in the lower due to attaching to more bone.
What are dead tracks?
They are lesions filled with air- usually tertiary dentine here because the dentinal tubules are exposed- bacteria enters here and there is now no odontoblasts.
When is secondary dentine produced?
When there is complete formation of the tooth.
NO DENTINAL TUBULES IN TERTIARY DENTINE.
.
What is the function of tertiary dentine?
To protect the pulp against any damage- plus these tubules from exposing vital tissue.
What are the two types of tertiary dentine?
Reactionary- Primary odontoblasts- when the stimuli id not as strong
Reparative- When the stimuli is strong (so might kill odontoblasts and secondary odontoblasts might take over- preodontoblastic cells take over to form tertiary dentine). Tertiary dentine happens in all exposures of the dentinal tubules.
What happens do odontoblasts as they get older?
They get thinner. Dentine formation gets slower as you get older too.
What happens to dentinal tubules when they get closer to the ADJ?
They get thinner. Intratubular dentine is formed as we grow- wider and cramped dentinal tubules as we get closer to the pulp.
