I don't have dentures but my husband is approaching the finish of a year in process of getting upper and lower dentures. His will be implants that use implanted posts to secure them so he won't need to use any dental glue and they will be removable. Implants do cost a lot more than regular dentures so that maybe a consideration we started with implant on the bottom and regular on top at $30,000+ but keeping the uppers from slipping was a challenge so we decided on implants on the top and that was another $40,000+, biggest part is the difference in materials used in implanted dentures over regular dentures. I would suggest that you go back to Aspen unless he didn't like his experience with them as I've been told that is anything needs to be corrected on uppers a differnent dentist might not want to do it. Also not sure what level of dentures your husband has but dentures are made of different materials and have different life expectancies.