tooth wear part 2.2

Question 1

For a fixed restoration to usually be possible how much tooth structure should remain

Answer 1

50% of tooth structure above the gingivla margin

Question 2

What materials would you want to use for an indirect restoration for a pt who is a severe bruxist

Answer 2

metal

Question 3

What is the key for small teeth in tooth wear cases

Answer 3

maxamise your retention and resistance from the use of grooves

Question 4

How do inlays and grooves help for small teeth in fixed pros and where would you place them

Answer 4

They enhance resistance form by reduction in radius of rotation

place inlays & grooves in long axis of tooth

Question 5

What type of tooth prep helps with retention but may affect aaesthetics

Answer 5

A more parallel prep but think about aesthetic vs function

Question 6

If a tooth was very worn away and is going sub gingival what could you do to aid in tooth prep of that tooth

Answer 6

electrosurgery to take away some the gingivae to expose more of the tooth to make adequate tooth prep

Question 7

Would you prep the palatal surface of an anterior tooth that has bad tooth wear, what crown would you use and why

Answer 7

No as there wont be much space and with crowns being PMJ the occlusion is set to bite onto the metal with this limited space

Question 8

What margins are preferable in tooth wear cases and fixed pros

Answer 8

Metal margins, chamfer

Question 9

If a pt with severe tooth wear on the lower teeth and alower PD what could you do to increase OVD to help faciltate resorations on the lower ants

Answer 9

Drill holes inot the denture on the post. teeth and palce composote on top just a couple of mm’s to hlep increase OVD