This study is constructed to assess in patients with carious vital posterior teeth whether the use of Vita Suprinity® (VITA Zahnfabrik H. Rauter GmbH & Co.KG- Germany) Zirconia reinforced lithium silicate partial coverage restorations will result in higher survival rates and better patient related outcome scores compared to IPS-e.max® CAD (Ivoclar Vivadent AG, Schaan - Liechtenstein) lithium disilicate partial coverage restorations.