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Dental Tribune United Kingdom Edition

14 Cosmetic Tribune United Kingdom Edition May 21-27, 2012 ate the gingival margin con- tours required to perform the aesthetic crown lengthening procedure. The surgical site was anaesthetised and the biological width was deter- mined. A 980nm diode laser with a 400μ cable was used for the surgical procedure. The amount of gingival tissue to be incised was outlined. Initial incision for the laser-assisted gingivectomy was similar to that of using a blade with an external bevel approach. The distance of the incision from the coronal marginal gingiva is based on the pocket depth and the amount of attached gingiva. The gingival chamfer is achieved and the initial cut is made slightly apical to the pocket depth measurement. A slow, unidirectional hand mo- tion is used, moving the tip at an external bevel towards the tooth structure. Caution is necessary, especially near the root structure, because of a possible laser - hard tis- sue interaction, which could harm the tissue. During the course of surgery, care was taken to maintain the biologi- cal width and to preserve the attached gingiva (Figs 3, 4, 5). The access cavity was pre- pared according to the tra- ditional method. The ro- tary instruments were used along with the ProTaper files for cleaning and shaping the root canals. Sterilisation A 980nm diode laser with a 200 μcable was used for sterilisa- tion of the canals along with regular chemical disinfect- ants. The advantage of laser sterilisation to a conventional irrigant regime to provide sterilisation is that while irri- gating solutions have a limited depth of penetration, the laser beam transmitted through the tip of a fibre is emitted in a lateral direction and has an effective penetration depth of more than 1,000μm. This was followed by obturation and coronal access restoration with composites. The patient was recalled after one week for further treatment. Phase 3: Aesthetic phase The third phase entailed la- ser-assisted depigmentation and laser-assisted bleaching. page 13DTß Fig 3 Immediately post-operative Fig 4 One week post-operative Fig. 5 Laser assisted sterilisation of the root canals in relation to 31, 32, 41 & 42. Fig 6 - 7 Laser assisted bleaching 16/03/2012 15:49