How long do implants last?

Since September, I've been experiencing a tingling pain in my teeth whenever I drink cold water. At first, it only happened on the left side, but then it spread to the right. And it's not just cold water, but also hot water and food. It also hurts when I brush my teeth with tap water if it's not lukewarm. Even with my mouth open, my teeth feel sensitive even when exposed to cold air, so I visited a dentist to inquire about root canal treatment.

 

He said it was okay and filled the space between my gums with a reinforcing agent and that was it.

But it was still the same, so I went to another dental clinic, and they didn't say anything, just told me not to floss too often, did some scaling, and told me to wait and see.

 

 

I asked about my right tooth because it has an implant, but in reality, the implant's nerve is already dead, so there can't be any pain, and they only said that I should suspect the molars (1) on either side of the implant or the prosthetic tooth (4) in front. But in reality, it seems like numbers 1, 2, 3, and 4 are all painful. When you blew air and flushed the teeth to check...

 

 

Around mid-January, the symptoms disappeared for exactly two weeks, but then the numbness and tingling started again. I'm thinking of going to the dentist, but I'm wondering if implants also have a lifespan.

My current implant is about 10 years old, so I'm wondering if there could be a problem (I was told it was well maintained until last year...) and if it would be appropriate to perform root canal treatment 1.4 for these symptoms! I'd appreciate the opinions of those who specialize in dentistry!