PPT-Complex Amalgam Restorations

Syed Mukhtar Un Nisar Andrabi Introduction Complex posterior restorations are used to replace missing tooth structure of teeth that have fractured or are severely involved with caries or existing restorative material. V Black believed that amalgam should consist of 67 silver 27 tin 5 copper and 1 zinc LowCopper Traditional Conventional Amalgam Composition Silver 60 Tin 29 Copper 6 Zinc 2 General Setting Reaction When lowcopper amalgam is triturated A Class II preparation. No. 245 Bur . Pear shaped bur No. 330. INITIAL DEPTH. Initial depth is 1.5 mm from the central pit or 0.2-0.5 mm into dentin or 2mm from the prepared . buccal. and lingual walls.. Dr . Rakesh. Kumar . Yadav. INTRODUCTION. Most of the teeth can be restored with amalgam and composite but if large crown portion lost due to caries or some other reasons, the remaining tooth structure is decrease and difficult to obtained resistance and retention form so prepare dentine lock and slot but when these retention features are insufficient to provide desired retention then pin supported restorations are used. . Signature or Patient or Guardian if a Minor Date Class I Amalgam Restoration. Conservative Approach. Cavity width : . ¼ intercuspal distance (1 – 1.5 mm).. Depth : . 1.5 – 2 mm. Indications. Moderate to large restorations.. Restorations that are not in . Introduction. Dental . amalgam has been in use for more than 175 years and has been used for hundreds of millions of restorations. .. This . material is used to restore teeth with . decay.. It . is one of the materials used for direct restorations include, silver amalgam, composite resin and gold foil.. A Class II preparation. No. 245 Bur . Pear shaped bur No. 330. INITIAL DEPTH. Initial depth is 1.5 mm from the central pit or 0.2-0.5 mm into dentin or 2mm from the prepared . buccal. and lingual walls.. MSc.operative. dentistry. Terminology. Silver paste. an alloy, one of the constituent of . which is mercury. an alloy made by mixing Hg with . Ag . dental amalgam alloy. components. 1. Silver ( Ag) 48- 70%. Dr. . . KaramAhmed. Operative Dentistry. Conservative Dentistry. It’s the art and science of . diagnosis,. . treatment. and . prognosis. of defects of teeth. Such treatment should result in:. Goals. Assistant Professor,. Conservative Dentistry & Endodontics. Overview. History. Basic composition. Basic setting reactions. Classifications . Manufacturing. Variables in amalgam . performance. History . Powder: the alloy powder composed of :. 1- sliver . : 40-70% . Gives strength . High expansion of the restoration. 2- Tin . 20-30%. Increase affinity for mercury. speed of amalgamation. Increase the flow of the amalgam . Amalgam adalah suatu alloy, air raksa dengan satu atau beberapa logam lain. Pada suhu kamar air raksa didapati berbentuk cairan, titik bekunya adalah -39ᵒC. Dapat segera mengalami reaksi amalgamisasi dengan logam seperti perak, tin, cuprum menghasilkan suatu bahan yang padat.. The retentive Macro-Lock Post Size #1 was able to accommodate the vacant space, leaving relatively low cement thickness.. . This post system was selected because of the anatomic taper in the apical sections, and the reported flexural strength of this post. . 1. 2. 3. 4. INITIAL DEPTH. 5. OUTLINE FORM FOR MANDIBULAR FIRST MOLAR. 6. Outline Form. Establishing outline form means:. 1) Placing preparation margins in positions they will occupy in the final preparation except for finishing enamel walls and margins..