Introduction of Bridge Types and Structural Elements PDF

INTRODUCTION OF BRIDGE TYPES AND STRUCTURAL ELEMENT ASSIST.PROF.DELÂL BOZYEL LEARNING OUTCOMES After the completion of this subject, student will be able to: Ø Decides on the dental bridge types according to the treatment. Ø Explains the possible fixed prosthodontic types plan basically according...

INTRODUCTION OF BRIDGE TYPES AND STRUCTURAL ELEMENT ASSIST.PROF.DELÂL BOZYEL LEARNING OUTCOMES After the completion of this subject, student will be able to: Ø Decides on the dental bridge types according to the treatment. Ø Explains the possible fixed prosthodontic types plan basically according to the missing teeth by using his own words FIXED PARTIAL DENTURES A partial denture that is cemented to natural teeth or roots which furnish the primary support to the prosthesis. Bridge (fixed partial denture) A prosthetic appliance that is definitively attached to remaining teeth and replaces a missing tooth or teeth. ABUTMENT A tooth which provides attachment and support for a bridge. RETAINER The component that is cemented to the abutments to provide retention for the prosthesis. PONTIC The artificial tooth that is suspended from the abutments. Natural tooth Remaining root Implant CONNECTOR The component that joins the pontic to the retainer. May be rigid or non-rigid. SADDLE (EDENTULOUS SPACE) The area of edentulous ridge over which the pontic will lie. DEFINITIONS THE TYPES OF BRIDGES The type of the Bridges according to support The conventional bridge They are the most commonly used type of fixed partial dentures. The design involves fabrication of a fixed partial denture, which takes support from abutments on either side of the edentulous space. The design may vary according to the condition of the abutments but the abutments on either side should be able to support the fixed partial denture. THE TYPES OF BRIDGES The type of the Bridges according to support Cantilever Cantilever fixed partial denture is used when support can be obtained only from one side of the edentulous space. These dentures have compromised support. The abutment teeth on the supporting side should be strong enough to withstand the additional torsional force. THE TYPES OF BRIDGES Cantilever Very conservative design especially when a single abutment is involved. When secondary abutments are used, parallel preparation can be easily obtained because the abutments are adjacent to another. Easy to fabricate. Produces torquing forces on the abutment. Cannot be used to restore long span edentulous spaces. Minor design errors can affect the abutments in a large scale. THE TYPES OF BRIDGES The type of the Bridges according to support Adhesive Bridge Dentures with or without preparation, which have a truly adhesion-based retention system, as there is no macromechanical retention on the metal surface of bridges, the surface of which is simply oxidized and bonded with organosilane adhesives. The type of the Bridges according to the material THE TYPES OF BRIDGES Precious Alloy Metallic Semi Precious Alloy Non Precious Alloy Material Combined Metalic with labial or buccal veneers Metallic with full veneer All resin Non metallic All ceramic THE TYPES OF BRIDGES The type of the Bridges according to connector types Fixed-fixed Bridges Has rigid connectors at both ends of pontics which forms a rigid prosthesis. The abutment teeth are therefore rigidly splinted together, and for a conventional bridge must be prepared parallel to each other so that the bridge, which is a minimum of three units, can be cemented in one piece. The retainers should have approximately the same retention as each other to reduce the risk that forces applied to the bridge will dislodge one retainer from its abutment, leaving the bridge suspended from the other abutment. THE TYPES OF BRIDGES Fixed-fixed Bridges Provides cross arch splinting. Ease of handling. Robust design with maximum retention and strength. Can be used for long spans. Preparations should be parallel. Isolation should be well provided for cementation. Unwanted stress and lever forces are directly transferred to the abutment producing considerable damage. THE TYPES OF BRIDGES The type of the Bridges according to connector types Fixed-Removable Bridges It has a rigid connector usually at the distal end of the pontic & a movable connector that allows some vertical moment of the mesial abutment tooth. THE TYPES OF BRIDGES Fixed-Removable Bridges Allows flexure of mandible Allows units to be cemented as individual sections. Preparations do not need to be parallel to each other More conservative of tooth tissue They act like stress breakers. Length of span limited. More complicated to construct in the laboratory than fixed-fixed. Difficult to make temporary bridges. Metal may show occlusally THE TYPES OF BRIDGES The type of the Bridges according to connector types Spring Cantilever Fixed Partial Denture This is a special cantilever bridge exclusively designed for replacing maxillary incisors but these dentures can support only a single pontic. Support is obtained from posterior abutments. THE TYPES OF BRIDGES Spring Cantilever Fixed Partial Denture Can be used for diastema cases. Metal crown retainers that require minimal tooth preparation, can be used in posterior teeth to replace missing incisors. The connector bar may interfere with speech and mastication. Deformation of the connector bar may produce coronal displacement of the pontic. There may be food entrapment under the connector bar, which may lead to tissue hyperplasia. REFERENCES • Contemporary Fixed Prosthodontics - Elsevier eBook on VitalSource, 6th Edition-2023 • Fixed Prosthodontics: Principles and Clinics-H.W.Anselm WiskottQuintessence Pub Co; 1st edition (June 21, 2011) THANK YOU