DIRECT VENEERS- FROM DESIGN TO IMPLEMENTATION
Figure 14. The content smile of the patient Figure 15. Smile of the patient
Figure 16. Smile of the patient
Many studies prove the usability of direct veneers in the everyday dental practice. Frese et al. 15 conducted a five-year follow-up study on 176 direct veneers. All veneers were made without preparatory works in order to provide color and shape correction at the Conservative Dental Clinic of Heidelberg University, Germany. After the follow-up period, the restorations were grouped into three categories: „ failure“, „ survival“ and „ success“. Damage occurred in 30 cases, but all of them could be repaired, so they belonged to the“ surviving” group. In the end, no restoration was classified as“ failure”. This made the five-year survival rate to be 100 % in this group, whose size can be considered as statistically significant. With the faults taken into account, the success rate was 84.6 %. 15 Garcia-Godoy et al. conducted a 6-year follow-up study on in vitro and in vivo restorations. 14 In vitro, they fitted MO restoration to 32 extracted human teeth, then exposed them to various influences for 6 years in a randomized way( immersion in water, thermo-mechanical load, both). In the in vivo group, direct restorations were fitted into 68 teeth of 30 individuals in total. After 6 years, the closure at the edges was evaluated. The in vitro experiments showed an 85 to 100-percent success for the enamel, while a 42 to 52-percent one for the dentin. In the in vivo group, the edge closure was intact in 75 to 90 percent for the enamel.
It was shown that there were significant differences between the enamel and the dentin. 16 In a third case, Gresnigt et al. monitored 96 direct veneer restorations for more than 40 months. Survival rate was 87.5 %. 17 The adhesive technique makes it possible to esthetically optimize such teeth which show no decay lesions without doing any damage. This way, we can also satisfy patients who refrain from any more invasive treatment, e. g. crowning. Based on the literature data shown, it can be stated that- with appropriate indications- direct veneer restorations can be equivalent alternatives to conventional“ golden standard” restorations. As Garcia-Godoy et al. showed, the“ appropriate indications” are a very important factor, because a sufficient bonding power can only be obtained on the enamel surface, i. e. it is reasonable to consider the indications of direct veneer if a large surface of dentin is exposed. 17 Our experience justifies the facts presented above. In case there is a sufficent amount of enamel surface we can decide on direct veneer restauration after measuring the possibility of preparing, elaborating and polishing the restauration.
4. Conclusions
To conclude, in the first place we can say that this adhesive technique makes it possible to esthetically optimize such teeth which show no decay lesions without doing any damage. We are also in a position to say that the facts presented in this paper are justified and supported by our experience. Secondly, another conclusion would be that, if there is a sufficent amount of enamel surface, a decision that could be taken would be to resort to direct veneer restauration. This can only be done after measuring the possibility of preparing, elaborating and polishing the restauration.
Acknowledgments
The authors declare no conflict of interest related to this study. There are no conflicts of interest and no financial interests to be disclosed.
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