Operative Dentistry - Dental pins
Dental Pins Add caption Dental pins Indicated when: -T here has been excessive loss of tooth structure or there is sufficient mechanical retention. - When a single cusp is missing, for placing a core before restoring with a cast restoration or for placement of a temporary amalgam restoration in a tooth requiring endodontic treatment under rubber dam. Add caption Advantages:- 1. Conservation of tooth structure. The preparation of pinholes is more conservative than slot and lock retention. Also the pin- retained amalgam is more conservative than the preparation for a cast restoration. 2. Appointment time, one visit. 3. Resistance and retention may be significantly increased. 4. Economic. Compared to cast restoration the amalgam restoration is a relatively inexpensive restoration procedure. Disadvantages: 1.Dentinal micro-fracture "drilling pinholes and placing the pin create craze line or fracture" as well as interval stresses in dentin. 2.Microleakage: has b...