Maryland bridge could be a good option for missing tooth?

Hi, thanks for write... NO, Maryland is the worst option you can do, dental Implant or dental bridge. Good luck.

Hi:Normally, Maryland bridge is very effective solution for missing front tooth.  In the molar area due to biting pressure it may not be a long lasting solution.Best,Dr. Maddahi

Seems the problem you are describing is related to a back tooth rather than a front one. Maryland bridges are somewhat outdated, but originally were designed to be used in front teeth areas. If the back / chewing teeth are to be replaced the option of a Maryland bridge may not work due to the issues with their stability. Choose the implant as this option will surely provide the most beneficial and long term solution to a tooth replacement, even if it involves the sinus lift procedure. Conventional bridge would surely be still a better alternative. Good luck, Dr. Daniyar 

A cantilever bridge or a Maryland bridge is a concept that ends up costing you more than you expect. Imagine eating at the end of a table that's supported on one side only. Even if they're cemented into the ground, the strain on the G's of the one side is tremendous. So the tooth that holds the cantilevered crown suffers this great strain also with use-eating, grinding, etc. What happens to the tooth is bone loss, fracture of the bridge or tooth and ultimate tooth and bridge loss. And you're left with a bigger problem. 
If you're able to place an implant, that's the best long term solution. An equally good long term choice is the three unit bridge. The so-described "table" is supported by four legs. Don't sacrifice solid design and known success for the idea of "conservation of tooth structure". You'll be happier in the end. 

A Maryland bridge is not a bad option for a front tooth if the adjacent teeth are not compromised. I wouldn't usually recommend a Maryland bridge for back teeth due to the amount of pressure placed on back teeth. It could easily break. A Maryland bridge might be considered temporarily in the area of a missing back tooth while waiting to have an implant placed, but since you said that is not an option for you, I would recommend a bridge for longevity.