You have a few ways you can replace a missing 1st molar.Option #1 - You could get a bridge. This would be the most cost effective way and fastest way to replace this tooth. Additionally, you can expect your bridge to last you a good 30 years, if it is made of zirconia. Zirconia is the substance that makes up man-made diamonds (known as cubic zirconia). Zirconia is very, very durable and works extremely well for posterior (back teeth) bridges. Zirconia can very easily be made to match your current tooth color. I would not get a ceramic bridge for the back teeth. Metal bridges like gold, are pretty outdated and unsightly to most people.Option #2 - You could get a titanium implant in place of the missing tooth. This is the most expensive option because it would require an implanted post titanium post (usually cost at about $5,000 by itself). Then you have to get a special crown made for your implant, which will cost about double the cost of a regular crown. Bridges can be placed in 1-2 appointments, but implants may take months for bone to heal. Also, undergoing an implant procedure is a lot more painful than the relatively pain-less bridge. It often takes patients weeks to heal from implants and usually takes months before they are completely stable.Option #3 - You can get a partial denture for that one tooth. This is the least expensive option, but I would not recommend this option if you can afford a bridge.Good luck and I hope this helps. Follow me if you have more questions.Sarah Thompson, DMD