Clinical survival of chair-side generated monolithic lithium disilicate crowns:10-year results
Original Article
First Online: 04 November 2017
Abstract
Objectives
Nowadays,
all-ceramic materials are routinely used within the treatment of
patients in dentistry. The objective of this prospective clinical trial
was the evaluation of chair-side generated monolithic lithium disilicate
crowns after 10 years.
Materials and methods
Forty-one
posterior full contour crowns made of lithium disilicate ceramics were
inserted with a self-adhesive resin cement in 34 patients (20
university/14 private practice) using a chair-side CAD/CAM technique.
One crown per patient was randomly selected for evaluation according to
the modified US Public Health Service criteria.
Results
After
a mean examination time of 10.1 years, 26 crowns were available for
re-examination. Within the observation period, five failures occurred
due to one crown fracture after 2.9 years, an abutment fracture after
6.0 years, one severe endodontic problem after 6.1 years, a root
fracture after 7.0 years, and a replacement of one crown caused by a
carious lesion after 10 years. Complications occurred as retention loss
of one crown, two carious lesions, and a change in sensibility
perception of two abutment teeth. All events were associated with
molars. The Kaplan-Meier analysis revealed a survival rate of 83.5% and a
complication-free rate of 71.0% after 10 years.
Conclusion
Due
to the small amount of technical complications and failures, the
clinical performance of monolithic lithium disilicate crowns was
completely satisfying.
Clinical relevance
The
insertion of chair-side fabricated monolithic lithium disilicate crowns
can be recommended for long-term use in the posterior region.
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