I'm on the fence regarding my opinion about Dr Perrigo & his office. I had gone far too long since seeing a dentist, so admit that my mouth was , & is, a challenge. I have a huge fear of going to dentists & asked for nitrous oxide before the 1st major round of work was to be performed. They brought in a tank/canister & placed the mask on , but I never get the calming effects of the nitrous oxide, just 2 hours of intense root canals, & extractions. They insisted that I was getting the nitrous, & just didn't realize it. I've had nitrous before with success, & told them that I knew I was NOT getting it. It resulted in being more traumatic for me , & subsequently compromised my trust. I'm sure that they won't want to publish this review, but that trauma led to a 3 day chain reaction of events which I'm convinced were triggered by the unfortunate dental mix-up . I don't know if they just gave me an extremely low dose or had an empty tank; actually seemed line I was receiving just pure oxygen during that work. Whatever happened , I wish that I had been believed when I voiced my concern 1/2 way thru! I was told that I was mistaken about what I was feeling ! That offense only added to the traumatic experience. I'm hurt, insulted & fearful now more than ever !!!