A pontic is attached to a retainer by a connector.
Connectors can be rigid or nonrigid. Nonrigid
connectors take the form of male- and female-locking
arrangements. Rigid connectors are classified as either
cast or soldered.
The teeth that support and hold the retainer are
called abutments. It is almost mandatory that an FPD
be supported by an abutment at both ends. This
requirement is waived in special situations. When a
pontic is suspended from only one retainer, it is
A number of teth can share a load being placed on
one of them. This helps prolong the life of loose teeth
or those that have lost supporting bone. Stabilizing a
mobile tooth or teeth is called splinting. When
stabilizing adjacent teeth with connected castings that
are cemented in the mouth, the prosthesis becomes a
form of fixed splinting. Such splints are made in the
same fashion as an FPD.
RESIN-BONDED FIXED PARTIAL
DENTURES (MARYLAND BRIDGE)
This type of fixed prosthesis is made of a single
pontic and thin metal retainers located both proximally
and lingually on the abutment teeth. The retainers are
specially designed metal-extensions (wings). The FPD
is retained by a resin bond between the acid etched
abutment teeth and the metal surface of the retainer. A
missing left central incisor is illustrated in A of figure
8-6. A fabricated Maryland bridge is illustrated in B of
figure 8-6. The bridge in place from the lingual aspect
is illustrated in C of figure 8-6. A posterior
resin-bonded FPD is shown in figure 8-7.
INTERIM FIXED PARTIAL DENTURE
This is a rigid, temporary restoration that replaces
missing teeth and is generally made from a self-cutting
resin. Its purpose is to protect cut tooth surfaces and
hold the abutment teeth in position while the definitive
FPD is being fabricated in the dental laboratory.
Figure 8-6.Anterior resin-bonded FPD (Maryland bridge).
Figure 8-7.Posterior resin-bonded FPD (Maryland bridge).
TYPES OF REMOVABLE PROSTHETIC
The three basic types of removable prosthetic
prostheses are complete dentures, removable partial
dentures, and overdentures. There are variations of
each of these types.