after going to an incompetent periodontist for implants, i was lucky enough to find dr langer who corrected the other periodontists mistakes. the difference was like night and day. his practice is the most efficient ive ever experienced and ive been going to dentists since ive been 6 because of a very complicated mouth. as a child i had removable bridges both top and bottom. as a teenager braces and then permanent caps. and as an adult 5 implants and a total mouth reconstruction. he's the best!