A Removable Partial Dentures (RPD) are for a partially edentulous dental patient who desires to have replacement teeth for functional or aesthetic reasons, and who cannot have a bridge (a fixed partial denture) for any number of reasons, such as a lack of required teeth to serve as support for a bridge (i.e. distal abutments) or due to financial limitations.
The reason why this type of prosthesis is referred to as a removable partial denture is because patients can remove and reinsert them when required without professional help.
Rather than lying entirely on the edentulous ridge like complete dentures, removable partial dentures possess clasps of metal or plastic that “clip” onto the remaining teeth, making the RPD more stable and retentive.
RPD can be manufactured with different techniques.
Oldest method is completely made from acrylic’s, and their clasp’s are made from orthodontic’s wire.
Their downfall is that they have thick acrylic base, and their clasps are not casted, so they don’t fit as precisely to the tooth.
Also they are more fragile and susceptible of fractures, also they doesn’t provide good aesthetic value because the clasps are visible.
Most popular RPD are Model Cast Dentures, which are manufactured from high strength dental alloy.
There are two types of model cast dentures.
First one is the classical type, where all the body and clasps of the denture structure are made from high strength dental alloy.
Their advantages are that they are very robust, very hard to brake, and their clasps fit to the tooth very precisely, so the retention they provide is far better than acrylic ones. Downside is that their clasps are visible, and also during constant usage (removing and inserting), their clasps make friction to the holding tooth, so the tooth enamel can be damaged.
Newest RPD are Model Cast Dentures With Attachments.
A precision attachment is a precision-machined male and female (key and lock) housing that connects a removable partial denture to fixed bridgework
The female part of the attachment is soldered to fixed crowns or bridgework the male part is attached to the partial denture. The male is machined by the manufacturer to fit the female with such precision that any male out of the box will fit any female with an exact degree of accuracy. All of the precision attachments in a partial denture are positioned so that they are exactly parallel to each other.
What are the Advantages of Precision Attachment Cases?Precision attachment partial dentures are the very best restorations where fixed restorations are contraindicated.
- There are several key advantages of this type of restoration:
- Cosmetic Appearance
- Maintainable Periodontal Health
- Longevity of Abutment Teeth
- Patient Comfort
- Questionable Teeth can be saved in a way that does not affect case
- Longevity if they are lost in the future
- Natural Tooth and/or Implant Abutments can Be Used
- Precision Attachment Partial Dentures Can Be Adapted to Compensate for Future Changes in the Mouth
There are many different kinds of attachments that will avoid the need for unsightly clasps, and confer the highest degree of patient comfort.