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wasinitiallydifficult,astherootcanalwasslightlyob- turated. Following instrumentation to ISO 20, the toothwaspreparedforarootfilling.Instrumentation to more than ISO 20 did not appear advisable, as the reduceddiameteroftooth#22alreadyconstitutedan increased fracture hazard during preparation of the endodontic post or in the presence of lateral forces. Atthesamevisit,anorthogradeendodonticfilling was placed using a thermoplastic restorative tech- nique (Thermafil, DENTSPLY DeTrey) and Sealapex (SybronEndo; Fig. 2). The control radiograph showed that the root-canal filling had been placed lege artis (Fig. 3). Surgical crown lengthening was planned for four weekslater.Likeallsurgicalinterventionsatourclinic, this crown lengthening was performed using ultra- sonic surgical instruments (Acteon). In this protocol, the surgeon employs a surgical kit containing multi- plecalibrateddiamondinstruments(Fig.4).Aminimal circumferential incision was performed under local anaesthesia, completely dispensing with extensive flap elevation procedures or relieving incisions. The marginal bone was prepared approximately 2 mm farther apically to provide sufficient biological width for a subsequent crown (Berglundh 1992). The useofultrasonicsurgicalinstrumentsallowsthesur- geon to proceed quickly while protecting the tissue, astheseinstrumentshelpreducetheriskofiatrogenic damage to the root dentine, a risk that is elevated when using conventional rotary instruments (Fig. 5). Thesitewassuturedclosedusingasyntheticmonofil- amentthread(8-0Trofilene,Stoma;Fig.6).Microsur- gical suturing is indispensable in the anterior region. Ifitisneglected,thiswillresultintissuerecessionand impaired aesthetics. The sutures were removed one week later. Wound healing was uneventful, and the patient was com- pletely free of pain and other symptoms throughout theentiretreatment.Afteranadditionalweek,apost- and-core build-up was done using the Fibrapost and Sealacoresystem(ProduitsDentaires;Fig.7).Theroot canalwaspreparedwithreamers,whichareavailable in four different diameters (Fig. 8). The option to use the depth stop to pre-calibrate the reamer to the de- sired length was helpful, not least as a precaution against excessive preparation depths (Figs. 9 & 10). The root canal was prepared under copious irrigation and conditioned with a self-etching bonding system (Sealacore; Fig. 11). TheUDMA-basedresincement(Sealacore)wasin- troducedintotherootcanalwithasyringeandappli- cation tip (Fig. 12). The Fibrapost is a fibreglass-rein- forced resin endodontic post (Fig. 13) with retention I hereby agree to receive a free trail subscription of (4 issues per year). I would like to subscribe to for € 44 including shipping and VAT for German customers, € 46 including shipping and VAT for customers outside Germany, unless a written cancellation is sent within 14 days of the receipt of the trial subscription.The subscription will be renewed automatically every year until a written cancellation is sent to OEMUS MEDIAAG,Holbeinstr.29,04229 Leipzig,Germany,six weeks prior to the renewal date. Reply per Fax +49 341 48474-290 to OEMUS MEDIA AG or per E-mail to grasse@oemus-media.de Last Name, First Name Company Street ZIP/City/Country E-mail Signature Notice of revocation: I am able to revoke the subscription within 14 days after my order by sending a written cancellation to OEMUS MEDIA AG, Holbeinstr. 29, 04229 Leipzig, Germany. OEMUS MEDIA AG Holbeinstraße 29, 04229 Leipzig, Germany Tel.: +49 341 48474-0, Fax: +49 341 48474-290, E-Mail: grasse@oemus-media.de Signature implants1/12 You can also subscribe via www.oemus.com/abo AD