On the pre operative X Ray, this asymptomatic tooth looks badly worn and its root canal is calcified, still, this tooth periodontal status is good and its crown to root ratio would still be acceptable even after having performed a potential crown lengthening procedure. Casted post bevelled margin preparation will include 2mm of preparation length on solid tooth to ensure an adequate length of parallel wall to achieve an effective ferrule.
In this case overall outcome success mostly relied on an intricate root canal procedure outcome. Dental operating microscope has been most helpful when attempting to locate this narrow root canal entry and thus, played a key role in helping preserving this natural tooth. Being able to perform a root canal in this case allowed the patient to preserve its tooth instead of extracting it and replacing it with a dental implant.
Root canal instrumentation has been performed with Mani stainless K files and ProTaper Universal (Dentsply). Chelator: RC Prep. PUI Irrigation: NaOCl 5%. Ultrasonic tip: BUC One from Spartan. P5 (Dentsply) Sealer used: Pulp Canal Sealer. Obturation technique WVC.