Total TMJ Joint Replacement

Question 1

6 indications for TMJ joint replacement

Answer 1

-failed previous TMJ surgeries
-severe arthritic joint
-loss of vertical mandibular height and occlusal relationship
-pathology
-ankylosis-either fibrotic or bony
-condylar agenesis

Question 2

what are the 2 approved TJR prosthetics in USA?

Answer 2

-Biomet
-TMJ Concepts

Question 3

Biomet is made out of what for condylar componenet

Answer 3

chromium cobalt alloy
3 sizes 45,50,55mm
may contain nickel-avoid in nickel allergy

Question 4

biomet is made out of what for fossa component

Answer 4

ultra-high molecular weight polyethyelene

Question 5

is pseudotranslation possibel with biomet TJR?

Answer 5

yes if unilateral placement due to push of contralateral TMJ

Question 6

TMj concepts condylar component is made out of what?

Answer 6

-pure titanium, custom made with CT scan and stereolithography

Question 7

TMJ concepts fossa component is made out of what?

Answer 7

pure titatanium w/ ultra high molecular weight polyetheylene

Question 8

what is the surgical technique- 2 approaches for TJR?

Answer 8

preauricular approach
submandibular retromandibular approach