I understand your concern, because after all, it is temporary, right? To get things straight, I imagine your dentist wanted to try this for now, and you are coming back to cement things permanently, and this is perfectly normal. We sometimes do this to let the bite settle, or to try it out, so I'd say you are lucky to have a professional that cares enough to take the extra time to be sure it is right. As far as your question about how long it will last: If it is kept clean and doesn't come off, I've seen people do fine after 6 months at the most with temporary cement and do just fine. The trick is keeping it in place for that amount of time, because they are made to come off easily to avoid damaging the tooth below. I'm sure the intention is only 2-4 weeks, and then you will be returning to cement it permanently. Take care and good luck with your treatment!
