I have the impression that Maryland bridges have fallen out of favor. If this is true, does anyone know why ?

I had a couple but they failed within 6 months each time.......

I have had alot better luck with them using bonding material to glue a denture tooth to the two teeth next to the hole. It's tough to find a dentist that will do it but, I had one last about 5 years doing it this way.

I have also had a denist who filled the hole with bonding material and then "sculped" a decent looking tooth......it has now lasted 10 years.