Bridge prostheses components pontic and abutment retainers 2

Bridge prostheses – components, pontic and abutment retainers. 2. Technology of mandibular hygienic bridge prosthesis using the “ Adapta” system 1.

Fixed partial denture “bridge” connector pontic retainer Abutment preparation abutment

Physiological mode of transmission of masticatory pressure

l Dental bridges are fixed prosthetic devices. They are cemented onto existing teeth or implants, and can only be removed by a dentist. As a fixed denture dental bridge made to replace one or more missing teeth.

What are the parts of a typical dental bridge (fixed)? A dental bridge essentially consists of: A pontic or false tooth used to replace the missing tooth, which is made from gold, alloys, porcelain or a combination of these materials. Two crowns - serving to anchor the false tooth in place.

Indications for Fixed Prosthodontics v. One or two adjacent teeth are missing in the same arch. v. The supportive tissues are healthy. v. Suitable abutment teeth are present. v. The patient is in good health and wants to have the prosthesis placed. v. The patient has the skills and motivation to maintain good oral hygiene.

Contraindications for Fixed Prosthodontics ØNecessary supportive tissues are diseased or missing. ØSuitable abutment teeth are not present. ØThe patient is in poor health. ØThe patient is not motivated to have the prosthesis placed. ØThe patient has poor oral hygiene habits. ØThe patient cannot afford the treatment.

Definition Pontic is defined as an artificial tooth on a fixed dental prosthesis that replaces a missing natural tooth , restores its function and usually fills the space previously occupied by the clinical crown.

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B) Classification of pontics Pontic designs are classified into two major groups: *Those that contact the oral mucosa *Those that do not **Based on type of materials for fabrication **Based on method of fabrication Pontic selection is based primarily on esthetics and oral hygiene.

Pontic design Proper Pontic Design leads to Success of the FPD *The pontic must be carefully designed and fabricated not only to facilitate plaque control of the tissue surface and around the adjacent abutment teeth but also to the existing occlusal considerations. *The design of pontic depends on various factors: Pretreatment assessment , Pontic classification , Biological considerations , Mechanical considerations and Pontic fabrication.

Optimal pontic design

Metal dental bridges

Dental bridges appearance

Ideal Requirements 1 -A pontic should restore the function of the tooth it replaces 2 -It should provide good esthetics 3 -It should be biocompatible with continued oral health and comfort. 4 -It should permit effective oral hygiene. 5 -It should preserve underlying mucosa and bone.

Requirements: Crowns on the supported teethnumber, status Law Vustrov abutment retainers type and choice Pontic - configuration and type

RESTORATION OF OCCLUSAL FUNCTION Ø Occlusal harmony during mandibular movement Ø Restoration of the swallowing function

Ø Crown contour compatible with the buccal, labial and lingual soft and hard structures of the mouth

Ø Arrangement of teeth Ø Correct anatomy of the crown portion

Ø Ø Harmony with healthy gingival tissues Harmony between facial features and crown contour Ø Restoration of natural coloring

How do Bridges Work? v Evidence v Function abutments pontic,

1) Evaluation of the medical – biological basis of the masticatory apparatus properly – choice and reducing the supporting tooth/teeth 2) Correct impression 3) Making temporary bridge 4) Removing of temporary bridge and cemented the new fixed definitive bridge

About the Procedure 1 2 3 • Reducing the adjacent abutment • Accommodation for the thickness of the crown • • impressions A me. Reducing the adjacent abutment Accommodation for the thickness of the crown tal framework, including the pontic, is created • A temporary bridge will be inserted for protection • The new permanent bridge will be fitted and cemented

A) Pretreatment assessment Certain procedures enhance the success of pontics they are: 1 Pontic space 2 Residual ridge contour 3 Gingival architecture preservation

l Provides the laboratory technician with a reproduction of a patient’s bite and opposing arch registration for designing the anatomic structures of the fixed prosthetic. l Open bite l Closed bite

The balanced restoration of teeth Technology of mandibular hygienic resin -bridge prosthesis using the “Adapta” system

Pontic Configuration High hygienic situated at the distance American l Heart-healthful hygienic l Extended medullary true hygienic l

Pontic Designs Smoot, round surface

Saddle or ridge lap pontics

Modified ridge lap

Sanitary or hygienic

Conical pontic

Ovate pontic

A Ridge lap Modified ridge lap Ovate Conical Sanitary/ hygienic Modified sanitary/ hygiene

Pontic and Edentulous Ridges

Necessary supplies, equipment and tools l ADAPTA DEEP – DRAWING SYSTEM

Necessary supplies, equipment and tools Modelling instruments

Two-layered plaster model with removable logs

0, 1 y 0, 6 mm

Rapid-Ringless-System Plasticks and hollow plasticks

Hydraulic Flask Press

LITERATURE Fundamentals of Fixed Prosthodontics Herbert T. Shillingburg, Jr, DDS Sumiya Hobo, DDS, MSD, Ph. D Lowell D. Whitsett, DDS Richard Jacobi, DDS Susan E. Brackett, DDS, MS