Zirconia copings held up well over three years in compromised anterior teeth in a clinical trial published in the International Journal of Prosthodontics (March/April 2010, Vol. 23:2, pp. 107-109).
For the prospective trial, University Clinic Erlangen researchers evaluated 19 0.3-mm-thick zirconia copings and feather-edged marginal preparations used to restore severe decay in the anterior maxilla.
Ten patients received 19 single-tooth restorations. After a mean follow-up of 39.2 months, every single restoration had survived with acceptable surfaces and no fractures.
"The clinical method may be a reliable treatment modality for restoring severely compromised anterior teeth," the researchers concluded.
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