5. Isthmus fracture

19/08/2020 2 min
5. Isthmus fracture

Listen "5. Isthmus fracture"

Episode Synopsis

2. ISTHMUS FRACTURE● Major cause is shallow preparation / inadequate depth of cavity.*● Other reasons ー too wide cavity preparation, sharp ‘axiopulpal line angle’. So bevel this axiopulpal line angle● If asked specifically about primary tooth isthmus # - shallow preparation● If asked specifically about permanent tooth isthmus fracture – sharp axiopulpal line angle .Q. The most common immediate ttt. Reported for fractured teeth was 25%.3. AMALGAM BLUEING (TOOTH) ● Seepage of amalgam contents upto DEJ causing blue discolouration. ● Management ー prior application of varnish.4. AMALGAM TATTOO (MUCOSA) ● Seepage of amalgam into the mucus membrane. ● Restoration, also retrograde amalgam restoration after apicoectomy. ● No treatment required.