What are some reasons for a failed one pontic fixed bridge that is about two years old when proper flossing, cleanings, etc., were held to?

Some thoughts...: Recurrent decay, cement washout, fracture of abutments. Hard to say why your bridge may have failed. Ask local dentist for a second opinion.

Many things: Fixed bridge failure mainly comes from not addressing the protocol of sound periodontal tissue around the abutment teeth . Constructing a fixed bridge while there is a periodontal problem could lead to a total failure of it in a short time . Aldo open margins , open contact . Improper occlusion could lead to failure if the bridge