A longitudinal study of the clinical performance of porcelain veneers

Abstract

A total of 315 porcelain labial veneers were fitted in 96 patients in two teaching hospitals, between July 1986 and October 1991, and were evaluated after a period of up to 63 months. During the evaluation period 53 (17%) restorations in 31 (32%) patients presented with a problem at review. Of these, 25 (8%) were of a minor nature and the veneer remained in use while 34 (11%) debonded or were removed. Increased problem and failure rates were associated with veneers placed on existing restorations, where tooth surface loss had occurred prior to treatment, and where inappropriate luting agents were employed. Age, gender, fabrication technique (platinum foil or refractory die), use of rubber dam and year of bonding were not significant factors.

A clinical longitudinal study 323 porcelain laminate veneers. Period of study from 3 to 11 years

“…This relatively low survival rate for our functional design restorations in comparison with other studies (2,3), may be justified due to the design of the dental preparation that we used (extension of the restoration to the back side of the tooth, leaving a fine bevel). For this reason, and due to in vitro studies (14)(15)(16) Other authors (6,9) show less favorable results, likely related to incorrect cement application techniques. In the majority of the clinical studies on this type of restoration, the degree of patient satisfaction has been a factor taken into account.…”

“…(Fig. 1 and 2) As with any technique in the process of development, the use of porcelain laminate veneers requires both mid-term and long-term studies in order to verify their usefulness and allow them to continue to be used, establishing, reducing, or expanding their indications for the population (3)(4)(5)(6)(7)(8)(9)(10)(11)(12). These techniques have been used at the Prosthodontics and Occlusion Teaching Unit of the Department of Medicine and Dentistry of the University of Valencia since 1985, which has now treated a significant number of patients with porcelain laminate veneers in response to their esthetic demands.…”

Crowns and other extra-coronal restorations: Porcelain laminate veneers

“…Indeed, a long-term follow-up 18 of veneers placed over a 10-year period shows a survival rate of 91% at 10.5 years (calculated with the Kaplan Meyer method). These excellent results may, amongst other things, reflect careful case selection, but it is worth noting that other authors, 5,13,19,20 have reported much higher rates of failure of between 7-14% over 2-5 years. Such studies suggest that the risk factors for veneer failure are:…”

“…Dunne and Millar reported that the incidence of such repairable defects (8%) was similar to the number of veneers requiring total replacement (11%). 5 It is useful to be aware of the above data when patients ask how long their proposed veneers are likely to last. It may also be prudent to warn them that although most (80-100%) 7 patients remain satisfied with the aesthetics, veneers are prone to marginal staining, the amount of which will vary from patient to patient.…”

“…4 These restorations are now an accepted part of the dentist's armamentarium. [5][6][7] Custom-made acrylic resin veneers preceded them, but these showed unacceptable levels of failure and of marginal stain. 8 Alternative veneering materials are still available, usually either direct or indirect composite resin materials.…”