I lost my upper plate that was originally purchased from this office. From the first day after the plate was installed I was back numerous times to have it adjusted where they wouldn't fall while talking or eating, to no avail. I was told that my mouth wouldn't support the denture & that I would have to use an adhesive. The plate was getting to the point where it was making my gum sore. The unexpected loss of that plate appears to have been a blessing. My new upper denture plate is great. I have been able to talk and eat without it falling. I now wish I would have been more assertive, as this experience cost me dearly in the purchase of a new upper plate.