Parts of Fixed Dental Prosthesis Dr Muhammad Rizwan

  • Slides: 18
Download presentation
Parts of Fixed Dental Prosthesis Dr. Muhammad Rizwan Memon F. C. P. S Assistant

Parts of Fixed Dental Prosthesis Dr. Muhammad Rizwan Memon F. C. P. S Assistant Professor

Parts of FDP Retainers 2. Pontic 3. Connectors 1.

Parts of FDP Retainers 2. Pontic 3. Connectors 1.

Connector Pontic Retainer Abutment Preparation Abutment Edentulous Ridge

Connector Pontic Retainer Abutment Preparation Abutment Edentulous Ridge

Retainer A part of FDP which unites the abutments to the remainder of the

Retainer A part of FDP which unites the abutments to the remainder of the restoration (GPT 8 -2005) Abutment: A tooth, a portion of a tooth, or that portion of a dental implant that serves to support and/or retain a prosthesis.

Types of Retainers Major retainers • FVC, PVC Minor retainers • Inlay, onlay Conservative

Types of Retainers Major retainers • FVC, PVC Minor retainers • Inlay, onlay Conservative retainers Telescopic retainers All metal, Metal Ceramic, All ceramic, All acrylic retainers

Pontic: An artificial tooth on a FDP that replaces a missing tooth, restores function

Pontic: An artificial tooth on a FDP that replaces a missing tooth, restores function and usually fills the space previously filled by a natural crown (GPT 8 -2005).

Ideal Pontic �Biologic • Can maintain healthy tissues • Cleansable �Mechanical • Strong enough

Ideal Pontic �Biologic • Can maintain healthy tissues • Cleansable �Mechanical • Strong enough to withstand functional forces • Rigid & resistant to deformation • Provides normal function �Esthetic • Looks like the tooth it replaces • Tissue contacts appear as normal tooth

Types of Pontics/ Classification With mucosal contact • • • Saddle pontic Ridge lap

Types of Pontics/ Classification With mucosal contact • • • Saddle pontic Ridge lap pontic Modified ridge lap pontic Ovate pontic Bullet shaped/ conical/ heart shaped/dome shape pontic Without mucosal contact • Sanitary/hygienic pontic

Saddle Pontic Overlaps the ridge Most natural feeling Most difficult to clean Used for

Saddle Pontic Overlaps the ridge Most natural feeling Most difficult to clean Used for • Limited occlusal-gingival space • Patients who object to lingual space

Ridge Lap Pontic � Resembles natural tooth � Like saddle on buccal � Convex

Ridge Lap Pontic � Resembles natural tooth � Like saddle on buccal � Convex on the lingual � Forms a large concave contact with ridge � Non-cleansable � Tissue inflammation � Do not use

Modified Ridge Lap � Aesthetic � Convex tissue surface � Used routinely in aesthetic

Modified Ridge Lap � Aesthetic � Convex tissue surface � Used routinely in aesthetic zone � Contacts tissue only on most facial surface of the pontic � Most cleansable � Least tissue irritation � Space between pontic and tissue on lingual can be unacceptable to some patient

Conical � Rounded and cleansable � Triangular embrasures may trap debris � Suited for

Conical � Rounded and cleansable � Triangular embrasures may trap debris � Suited for thin mandibular ridges � Non-esthetic regions

Ovate � Highly aesthetic � Bluntly rounded pontic tip set into concavity in the

Ovate � Highly aesthetic � Bluntly rounded pontic tip set into concavity in the ridge � Pontic appears to be “growing” from ridge � Difficulty in cleaning � Potential for tissue irritation

Hygienic � No contact with ridge � Most cleansable � Used in non-aesthetic areas

Hygienic � No contact with ridge � Most cleansable � Used in non-aesthetic areas � Used primarily in posterior regions � Convex in all directions � O-G thickness no less than 3 mm � Amount of space under 1 - 1. 5 mm

Connectors: The portion of FDP that unites the retainers and pontics (GPT 8 -2005).

Connectors: The portion of FDP that unites the retainers and pontics (GPT 8 -2005).

Types of Connectors Rigid Connectors a cast, soldered, or fused union between the retainer

Types of Connectors Rigid Connectors a cast, soldered, or fused union between the retainer and pontic (GPT-8 -2005)

 Non Rigid Connectors any connector that permits limited movement between otherwise independent members

Non Rigid Connectors any connector that permits limited movement between otherwise independent members of a fixed dental prosthesis (GPT-8 -2005) • • Tenon- Mortise Connectors Loop Connectors Split Pontic Connectors Cross Pin and Wing connectors