When there are multible teeth missing and there are no back teeth to use as abutments for a FPD the RPD is an option. Restore all your missing teeth on one removable appliance. The RPD may be a full acrylic appliance with clasps that connect with your teeth or it may have a metal frame work coated with acrylic (gum-colored plastic) with metal clasps. Crowns are recommended on your natural teeth that will hold the clasps for better fit and also to protect them from the clasps. Precision attachment also can be used which offer more esthetic result than the metal clasps. Precision attachments are small “buttons” that are built-in the crown and RPD as male-housing so the metal part will not show but they cost more. RPD is the choice for people who want a quick and affordable solution.
Hybrid removable denture or sleeves with crown prosthesis or over-lay prosthesis are diferent names of a version of a RPD. Instead of the clasps or precision attachments we use the teeth as an ankorage of the denture. In this manner we preserve the remaining teeth and help in conservation of the bone. We use all or some of the remainig teeth and cover them with a metal framework (fullmetal crown). On the body of the removable denture there is a metal connector that will pair with that tooth offering high retention and esthetic results. The only disadvantage of this appliance is the cost because the framework must be made of precious metal (gold).
Overdenture on locators
In cases that there is enough bone only in the front area of the mandible or maxilla to place two to four implants, then an overdenture supported on locator attachments can offer excellent retention of the denture. Locators are small metal “buttons” that are screwed on the implant (male) and the housing part on the denture providing easy sitting of the denture by the patient.