Different Types Of Partial Dentures
Patients can opt for many different types of partial dentures. There are combined prosthetic restorations of partially edentulous dentitions with fixed and removable prostheses.
Acrylic Dentures
These are the basic types known in the NHS as flippers or gum strippers They are characterized by pink plastic denture bases, and low cost basis teeth and the denture base can easily be added to an existing treatment RPD. Indications are when remaining teeth have existing decay or periodontal disturbances It can be as an “immediate PD”, most frequently retained with wire clasps. They feature several disadvantages as follows:
1. The acrylic denture base tends to be brittle and due to its irregular shape tends to break frequently.
2 To counteract their tendency to break, the acrylic is usually built reasonably thick which can take some time “get used to it”.
3. The denture base rests only on the gums and is much less stable than the more permanent RPD which is “tooth borne”
4. As the gums resorb, the false teeth tend to sink below their original level making it necessary to reline them frequently and sometimes even to reset the teeth which adds more expenses
When a flipper is intended for temporary use while replacing one or more front teeth, it is often termed a "stay plate". Most frequently, these are intended to be used only for several months while waiting for healing during the different phases of implant placement. One of the neatest tricks that a flipper can make is to act as an "immediate partial denture".
This means that the appliance can be made before the teeth are removed, and inserted immediately after the extraction of the offending teeth. If the patient is presently wearing one of these inexpensive appliances and needs to have an existing natural tooth extracted, an impression can be taken with the flipper in place The impression with the flipper embedded in it is sent to the lab and a new denture tooth is put in place of the one to be extracted. This can be done in a single day, so a patient can come in with a bad tooth and walk out with a good false tooth in its position.
Cast Metal-based Dentures
Cast Metal RPD features its advantages, according to Dr Paul Revere The advantages are listed by him in the following range: the framework (FW) can be made out of cast silver, but can be cast from Cr Co alloys; the sore spots are seldom an issue as the FW
It is most often used in cases with patients who exhibit TMJ and who have known bruxers in these cases, it is better than flexible RPD. The metal framework does not contact the gums Thus, as the gums resorb, this type of partial does not sink into them and rarely requires relines.
As the teeth are altered by the dentist beforehand, there are fewer limitations in the placement of clasps, and they are less likely to be seen than the wrought wire clasps of the treatment partial. Modern frameworks are cast from an extremely strong alloy called chrome cobalt which can be cast very thin and are much less likely to break than -all plastic varieties. They are also much less noticeable on the tongue.
Saddle Lock Dentures
The Saddle lock” hidden clasp” RPD has a most important advantage: it allows facial clasps to display elimination and natural aesthetics. This type of RPD has superior stability and retention. It is defined by the usage of mesial/distal concave surfaces of the abutment teeth, with its retention instead of the buccal undercuts and retentive finish line of the clasps with great resiliency.
Flexi Valplast Dentures
The Vitallium/Nylon Partial denture A good alternative to the all nylon partial denture is one made with a combination cast metal framework with nylon clasps. This has the advantage of being tooth supported and also having gum collared plastic clasps like the nylon partial
Flexible Partial Denture - Features
1 Imported material with original packaging, natural colour, vivid, flexible, and free from transfiguration.
2. No metal snap ring, comfortable and cosmetic appearance.
3 Easy operation, flexible, transparent
4. Fastened with holder, stable.
Flexible partials may be used whenever you consider metal free partial dentures for your patient Flexible partials are translucent, allowing the natural tissue tone to show through. Patients find these partials extremely comfortable and durable without sacrificing aesthetics. These light weight, monomer free flexible restorations are ideal for partial dentures, and unilateral partials, even in conjunction with cast partials frameworks which can eliminate unsightly metal clasps.
Flexible partials are biocompatible nylon thermoplastics with unique physical properties. Their advantages and benefits are proven in dental practice. They are comfortable, have lightweight, flexible, and natural appearance This type of RPD is ideal for patients allergic to acrylic monomers. The flexible framework RPD is characterized by the application of nylon like materials to the fabrication of dental appliances The most common name brand is Valplast which has the following features:
● Nearly unbreakable;
● Coloured pink like gums;
● Can be built quite thin
● Can form not only the denture base but the clasps as well;
● Extremely stable and retentive
● Easy and perfect fitting and adjusting.
Some disadvantages are reported such as like:
● Sore spots around clasps.
● The RPD should be immersed in hot water for a minute to ease
● Use only a Vulcanite bur or “acrylic cutter” do not use a standard carbide to adjust.
● Cutting with slow speed only
● Valplast cannot be relined.
Flexible Plus Cast Thermoplastic RPD
Their advantages are:
● Elimination of metal usage;
● Thermoplastic material is in three tissue shades;
● Monomer free;
● Virtually unbreakable;
● Possibility for combining with metal FW to eliminate the display of metal labial clasps
The Nesbit RPD
The flexible FW Nesbit RPD can replace any number of teeth in the dental arch. There is one type of RPD that can legally be built only out of the flexible variety of material the single tooth RPD we refer to as a Nesbit. Dentists used to build Nesbits for their patients all the time. They were composed of a single denture tooth (usually a back tooth) between two cast metal clasps that attached to the teeth on either side of the missing one.
They looked a little like spiders when out of the mouth Patients tended to like them, but they came to an abrupt end in the 1970s. Before that time, in the rare event that a patient swallowed his appliance, he either waited for it to pass or sought medical help on his own assuming that the accident was his fault
The Cu-sil Partial Denture
A new kind of appliance is now available to allow a patient to retain one or more teeth and still wear a "full denture" A Cu sil partial denture is a full denture with holes that allow the remaining natural teeth to protrude through. Normally, the key to retaining a full denture is the suction that is obtained by fitting the plastic close to the gum tissue, but a hole allowing a tooth to protrude through would ordinarily break the suction.
The Cu sil partial denture is unique because the holes that surround the natural teeth are lined with a Silicone rubber gasket which snugly holds the teeth while allowing a natural suction to form under the denture For a more complete discussion of the
Cu sil partial denture, it is a transitional denture with a permanent feature. The Cu Sil is a patented tissue bearing appliance from a soft elastomeric gasket, which clasps the neck of each natural tooth
Immediate Transitional Dentures
The transitional denture may be used when the loss of additional teeth is inevitable but immediate extraction is not advisable or desirable Artificial teeth may be added to the transitional denture as and when the natural teeth are extracted. Treatment dentures are used as a carrier for treatment material. It is used when the soft tissues have been irritated by ill fitting prosthetic devices
Resin Dentures
Using certain Light Cured Resins Light curing materials for the lab and dentist are useful Material options include:
Denture relines
Repair material
Denture bases
This kind of RPD is monomer free.
Vinyl Composite Dentures
The second type of flexible partial denture base uses a vinyl composite instead of nylon. The most commonly sold brand is Flexite. A second brand Is Ultraflex. These materials are also flexible and can be built with tooth or gum coloured clasps. Ultraflex comes even in a clear variety Unlike partial nylon dentures, they are much
easier for the dentist to adjust making them a much more "user friendly" denture base.