Clinical results of lithium-disilicate crowns after up to 9 years of service.

Objectives: The purpose of this prospective study was to evaluate the clinical outcome of anterior and posterior crowns made of a lithium-disilicate glass-ceramic framework material (IPS e.max Press, Ivoclar Vivadent).

Materials And Methods: A total of 104 single crowns were placed in 41 patients (mean age, 34 ± 9.