Mumsnet hasn't checked the qualifications of anyone posting here. If you have medical concerns, please seek medical attention; if you think your problem could be acute, do so immediately. Even qualified doctors can't diagnose over the internet, so do bear that in mind when seeking or giving advice.
I have a rechargeable Sonicare. I bought it because it was cheaper than the Waterpik. I fill it with diluted mouthwash. I don't know if it does any good, but it leaves my mouth feeling clean and fresh.
My Dd has a waterpik flosser, she also puts in neat mouthwash as well, she was advised to get one after she had her braces off as she has a metal retainer behind the top and bottom front teeth to keep them from moving should she forget to put in her plastic retainer of a night.
My Dd is unable to use tape flosser on the front teeth as the metal retainer prevent the tape going to the bottom of the tooth. She loves her waterpik and I've just brought some replacement heads from amazon.
I have the phillips sonicare too. I was advised to buy a water flosser or similar- but the hygienist said she could not recommend any particular type/ brand. She did give me some pointers on how to choose. Look at the amount of water/ mouthrinse it holds - is it enough for each use ( sonicare is) or will you need to keep filling it. Do you have a mirror over the sink (water/mouth rinse can be splashy- I presume an air flosser is not?) Will it suit your electrical use ( ie can it be put on charge easily without getting in the way?). If others need to use it can it be shared/heads changed easily ( sonicare is too stiff for my small hands to easily swop over- DH can do it- kids probably not)There were other things. I think I read lots of reviews- but it is confusing. Mine only partially works because my teeth are squashed together ( no gaps)- but it is easier than flossing so gets done every day( I still floss traditionally occasionally). By the way if you have no 2 pin shaver sockets in your bathroom, you will need to buy a 2 pin shaver adapter - sold in Boots and electrical stores etc and plug into your normal sockets.
I have one and I love it. Phillips one, I also put mouthwash in it. You still need to floss though according to my dentist. I use the water flosser twice a day and floss with tape...a little less often!