Australasian Dentist Issue 93

CATEGORY 84 AUSTRALASIAN DENTIST Solutions featured: 3Shape TRIOS intraoral scanner 3Shape TRIOS Design Studio – open chairside solution Case information The patient, a male, age forty-three, is a long-standing patient at the practice. He has full dentition – with several crowns present on molar teeth. There is a history of bruxism, clenching and cracking teeth with the patient not a very complaint occlusal splint wearer. Tender tooth46has adeteriorating large MOD composite resin filling with a lingual crack visible under high magnification. Tooth tests positive for a crack associated with the ML cusp. The patient was given two options for treatment: u Replace filling with a larger resin filling that eliminates the ML crack u Remove resin filling and undermined cusp and restore with a porcelain crown/onlay Upon assessment of the clinical presentation, functional habits, patient history, treatment plan and intended outcome, a decision was made for a crown- lay preparation and fabrication of lithium disilicate restoration. Treatment goal The treatment goal was to create an aesthetic crown that met all clinical requirements and accommodated the patient’s parafunction and intermittent occlusal splint usage. Treatment Time spent on each procedure throughout the case is documented by Dr Somana. Bonding Protocol Crown prepared as per manufacturers recommendations (Ivoclar Vivadent). Bonded with Panavia F 2.0 (Kuraray) as per manufacturer’s instructions LINICAL Crown-lay lithium disilicate restoration using chairside workflow By Dr Kasen Somana, Signature Dentistry Fig. 1 (i + ii) , 2 Lower full arch and model set pre-prep 3Shape TRIOS IO scan (7 minutes) Fig. 3, 4, 5 Tooth prep under 12x magnification (30-40 minutes) Fig. 6 Prep- Arch Scan (30 seconds) Fig. 8, 9 Restorative anatomy design proposed by TRIOS Design Studio Fig. 10, 11 Restoration’s occlusal fit checked with 3Shape Patient Specific Motion and adjusted Fig. 7 Occlusal plane defined