Fixed Theoretical Fall 2024 PDF

II-The Bridge It is a masticating or incisive surface, of metallic and/ or non-metallic material, spanning a space in the dental arch and firmly attached at one or both ends to the adjoining teeth (fig. 10). -Abutment Tooth It is a prepared natural tooth or root, which support and retai...

II-The Bridge It is a masticating or incisive surface, of metallic and/ or non-metallic material, spanning a space in the dental arch and firmly attached at one or both ends to the adjoining teeth (fig. 10). -Abutment Tooth It is a prepared natural tooth or root, which support and retain the bridge from one or both ends. Pier (intermediate abutment tooth) It is an isolated abutment tooth where the anterior and the posterior teeth to it are missing. -Pontic It is a suspended part of the bridge, which restores the coronal portion of the missing tooth esthetically and functionally. - Retainer It is an artificial restoration rebuilding the prepared abutment tooth and encored the pontic to the abutment. - Connector It is that part of the bridge which connects the pontic (s) with the retainer (s). It may be: a. Rigid cast / solder joint. b. Non-rigid occlusal or lingual rest 8  Fig. 10: Components of a fixed Partial Denture Fixed-Fixed Bridge: It is a bridge in which the pontics and retainers are connected together at both ends with rigid connector and the bridge is cemented at both ends to the abutment teeth (fig.11). Fixed-Supported Bridge: It is a bridge in which the pontic is connected to the retainer at one end by rigid connector and by non-rigid connector in the other end allowing some individual movement of abutment (fig.12). Fixed-Free Bridge: (Cantilever Bridge) It is a bridge with its pontic is soldered and derives its support from one or two retainers at one end only while the other end is unsupported (fig.13). 9  Spring Cantilever Bridge: It is a cantilever bridge in where the pontic is at the end of resilient curved arm rested on the palate deriving its support from an abutment remote from the edentulous area (palatal spring) (fig.14). Simple Bridge: It is one single type bridge which may be fixed-fixed, or fixed-support, or fixed- free, or cantilever, or spring cantilever or removable bridge. Compound Bridge: It is a combination type of bridge composed of two or more of the simple bridges (fig.15 A and B). Complex bridge: It is a bridge that extends at one of its terminals beyond the canine. Unilateral Bridge: Two or three teeth anterior bridge does not cross the midline. Bilateral Bridge: Bridge which components extend on both sides of the midline. Immediate Bridge (Immediate Replacement Bridge): It is a bridge with root extension pontic and constructed before extraction of the tooth and seated in position immediately after extraction at the same visit. Temporary Bridge: It is a bridge made and used temporarily for the protection of the prepared teeth and maintenance of the space till completion and cementation of the bridge. 10  Fig. 11: Fixed-Fixed Bridge Fig.12: Fixed-Supported Bridge Fig. 13: Fixed- Free Bridge Fig. 14: spring cantilever Bridge A B Fig.15: Compound bridge. A; Fixed-fixed-Supported Bridge. B; Fixed-fixed-free Bridge 11