Preclinical fixed prosthodontics.pdf

Preclinical Fixed Prosthodontics Dr. Safaa Amir Heiba BDS, MSc, U of K Introduction:  Prosthodontics: Is a branch of dentistry that concerns about the replacing teeth and contiguous tissues or jaw structures by artificial devices to restore oral function, comfort, appearance and health o...

Preclinical Fixed Prosthodontics Dr. Safaa Amir Heiba BDS, MSc, U of K Introduction:  Prosthodontics: Is a branch of dentistry that concerns about the replacing teeth and contiguous tissues or jaw structures by artificial devices to restore oral function, comfort, appearance and health of the patient. Introduction:  Prosthodontics: It has three main branches: Removable, fixed, and maxillofacial prosthesis. Introduction:  Fixed Prosthodontics: Is a branch of prosthodontics that concerns about the replacing and/or restoration of teeth by artificial substitute (cast prosthesis) that can not be removed by the patient. Introduction:  Fixed Prosthodontics: Is a technique used to fabricate a fixed prosthodontic appliance that is securely fixed to natural tooth/teeth or screwed to one or more dental implants/implant abutments to restore teeth function and esthetics, it can not be removed by the patient. Introduction: Aims fixed prosthodontics:  Restore function of teeth; mastication and speech.  Restore esthetics.  Maintain oral health and integrity. Introduction: Indications for fixed prosthodontics:  Badly broken down teeth.  Primary trauma.  Tooth wear.  Hypoplastic conditions (congenital or acquired). Introduction: Contraindications for fixed prosthodontics: There is no absolute contraindication for fixed prosthodontics however it is better to put the following situations in consideration: Introduction: Contraindications for fixed prosthodontics:  When a more conservative approach can provide satisfactory results. Introduction: Contraindications for fixed prosthodontics:  Patient’s age and medical condition: young patients below 18 have large dental pulps and fixed prosthesis may cause them gingival recession. While other patients; elderly and medically compromised, may not tolerate long treatment sessions. Introduction: Contraindications for fixed prosthodontics:  Patients with bad oral hygiene; it should be controlled first. Introduction: Types of cast restorations:  Crowns; partial or full coverage crowns.  Bridges.  Inlays.  Onlays.  Veneers. Introduction: Crown: It is a restoration that restores missing tooth structure of three or more axial surfaces and the occlusal/incisal surface of a tooth with a material such as cast metal alloy, ceramics, resin or a combination of materials. Introduction: Crown:  Anatomical crown: it is highest/topmost part of a tooth occlusal to the cementoenamel junction.  Clinical crown: It is the part of the tooth that is visible in the mouth. Introduction: Crown:  Dental crown: it is an artificial replacement that restores missing tooth structure by surrounding part or all of the remaining structure with a material such as cast metal alloy, metal ceramics, ceramics, resin, or a combination material. Introduction: Bridge: It is also called fixed partial dentures. It is a dental prosthesis that is luted, screwed, or mechanically attached or otherwise securely retained to natural teeth, tooth roots, and/or dental implants/abutments that provide the primary support for dental prosthesis and restoring teeth in partially edentulous arch; it can not be removed by the patient. Introduction: Bridge: Consists of three components:  Retainer.  Pontic.  Connector. Introduction: Inlay: It is a fixed intracoronal restoration (not including the cusps), a dental restoration made outside of the tooth to correspond to the form of the prepared cavity; which is then luted into the tooth. Introduction: Onlay: It is a fixed partial coverage restoration that restores one or more cusps and adjoining occlusal surfaces or the entire occlusal surface and is retained by mechanical or adhesive means; Introduction: Veneer: It is thin lamination, shell-like dental material bonded to one side of the tooth to improve its appearance and/or restore it’s normal contour. Introduction: Classification of fixed restorations: According to retention: Either:  Extracoronal restorations.  Intracoronal restorations.  Intraradicular restorations. Introduction: Classification of fixed restorations: Extracoronal restorations: Either:  Full coverage restorations.  Partial coverage restorations. =========================== =========================== =======++++++++++++++++++== ===]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]] ]]]]]] Introduction: Classification of fixed restorations: Intracoronal restorations:  Inlays.  Onlays. Introduction: Classification of fixed restorations: Intraradicular restorations: Either:  Post-retained restorations.  Implants. Introduction: Classification of fixed restorations: According to material used: Either:  Ceramic restorations.  Metal-ceramic restorations.  Full metal restorations.  Resin restorations. Introduction: Classification of fixed restorations: According to position: Either:  Anterior restorations  Posterior restorations Introduction: Classification of fixed restorations: According to time: Either:  Temporary restorations.  Permanent restorations.