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What are three of the five Pathologic Changes to the Teeth ?
•Genetic
•Environmental
•Disease processes
•Metabolic disturbances
•Non-genetically linked defects in normal development and growth .
What kind of changes occur in Category 1?
•Category1: Changes occurring during initial growth and development of the tooth
What kind of changes occur in Category 2?
•Category2: Changes occurring after tooth development when the tooth is fully erupted
What are three of the sevenPost-developmental abnormalities?
•Attrition
•Abfraction
•Abrasion •Erosion
•Pulpitis, Pulp Stones
•Internal and External resorption
•Enamel hypoplasia
Name this lesion:
•Wearing away of tooth structure causedby tooth-to-tooth contact.
•Some occurs over time as part of theaging process
•Considered pathologic when the loss issevere and out of proportion to age of patient
Attrition
•Sometimes considered a subcategory of attrition
•Loss of tooth structure in the cervical area due to occlusal forces
–Thinner enamel at CEJ
–Curvature of enamel at CEJ
–Greater tensile strength of dentin
Abfraction
•Pathological wearing away of tooth structure due to mechanical forces
•Usually from tooth brushing butcan be from other habits such as the use of bobby pins, biting thread, etc.
•Usually presents as a V-shaped orU-shaped depression
Abrasion
•Loss of tooth structure due to chemical agents
•Caries is not considered a category of thislesion •Usually from foods and liquids
•Saliva should buffer acids so xerostomiacan contribute to this process
•Bulimia, GERD, pregnancy, alcoholism canbe causes as well
Erosion
• Inflammation of the pulp from stimuli
– Caries
– External trauma
– Trauma from occlusion, mastication – Dental procedures
– Extreme temperature changes
• May appear normal radiographically orhave a slight widening of the PDL at the apices
• Classified as threedifferent types…
Pulpitis
•Inflammation will resolve and the tooth will return to normal.
•Pain is usually the presenting symptomwith sensitivity to cold, sometimes hot
•Percussion does not normally initiatepain
•Pain usually goes away if stimulussubsides
Reversible Pulpitis
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