トップへ » Considering Dentures? » Dentures and TMJ Arthrosis » Cases of TMJ arthrosis caused by dentures
Cases of TMJ arthrosis caused by dentures
A patient who came in complaining of pain in the right jaw and the inability to open his mouth straight.
[state of the mouth when opened]
Seen from the front, it is obvious that the jaw has shifted to the left.
[state of dentures]
Looking at the dentures, it can be seen that the teeth on the left side are more worn down than those on the right side.
We took an X-ray of the joints in the jaw. We were able to diagnose that the articular disk on the left-hand side was shifted forward and had lost function.
Since this treatment method was to be carried out before making new dentures, we duplicated the patient's dentures, lowered the front of the lower jaw and raised the right side of her bite by 2 millimeters to give her smooth movement. We confirmed that she was able to open her mouth straight using the duplicate dentures and after making sure there was no more pain in the jaw, we remade her dentures.
We take a mold of Inaba-style full dentures using the maxillomandibular simultaneous impression method.
What are full dentures made using the maxillomandibular simultaneous impression method?
We used the PDRI Insert of the KaVo PROTAR actuator, a device used to measure bite alignment, to adjust the patient's bite alignment by lowering the front of the lower jaw in order to provide her with smooth jaw movement.
Dentures were made after we confirmed that the right jaw needed to be lowered by 2 millimeters during the jaw function exam by creating a graph using CADIACS and setting the PDR insert to 0 and then again to 2 millimeters.
We were able to alleviate the patients jaw pain with these dentures and they also allowed her to open her mouth straight.
This treatment method produces dentures that allow movement of the jaw joints. This particular case was rather complicated and required Dr. Shigeru Inaba's wide range of knowledge. It is very likely that using dentures that do not fit correctly over a long period of time may lead to TMJ arthrosis.
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