Cold cured or cold pour dentures, also known as temporary dentures, do not look very natural, are not very durable, tend to be highly porous and are only used as a temporary expedient until a more permanent solution is found. These types of dentures are inferior and tend to cost much less due to their quick production time (usually minutes) and low cost materials. It is not suggested that a patient wear a cold cured denture for a long period of time, for they are prone to cracks and can break rather easily.
You may need new dentures if they are discolored, severely deteriorated or uncomfortable. Yellow or brown stains are the most common types of discoloration. Meanwhile, deteriorating dentures won't tear or grind food properly when you bite into something or chew. Dentures that don't fit properly can cause pain. If you're unsure how dentures should fit or feel, talk to your dentist.
I've had the immediate dentures for a year now and the office has been great the whole time. I've had a number of relines as my gums healed. I'm excited to get my permanent set. To be honest, when I first got the immediates placed, I didn't like them. Something seemed “off” and I couldn't put my finger on it. Looking back, it was just odd seeing myself with different teeth. I soon loved them. They look great and function like they should.
Later that afternoon I came back to have 16 teeth extracted. I got to the office and waited about 30 minutes before I was seen. I got to the back and began injections. After this I went to a full blown panic attack and came close to passing out. The one positive is the dentist who was working on me took it in stride. I wasn't treated disrespectfully and after about 30 minutes the panic subsided and she was able to finish my injections and begin pulling teeth.