Effect of all-ceramic crown for cosmetic restoration of adult anterior teeth malalignment

Objective To explore the effect of all-ceramic crowns for cosmetic restoration of adult anterior teeth malalignment.Methods Twenty-eight patients with anterior teeth malalignment from October 2005 to October 2010 in the Department of Stomatology were selected and divided into two groups.The observation group(14 cases)applied all-ceramic crowns for cosmetic restoration,while the control group(14 cases)used nickel-chromium alloy full porcelain.The patients were reexamined one year after treatment,and the two groups were compared in gum color,gingival index,the edge of the suitability.Results One year after treatment,the gingival darkening teeth of the control group was 61.3%,and the observation group had no gum color change occurs.The gum color changes of the two groups had statistically significant difference(P0.01).Gingival index of the control group over 1 was 28.1%,and the observation group was 3.0%.The control group was significantly higher than the observation group(P0.01).The proportion of possession of class A of the suitability of the edge of the set of teeth controls was 68.8%,and the proportion of the observation group was 90.9%.The difference between the two groups was statistically significant(P0.05).Conclusion Using all-ceramic crowns for cosmetic restoration of anterior teeth malalignment,the tooth shape and color and marginal fitting are all in good condition,and the effect is significantly better than the nickel-chromium alloy full porcelain,which is worth to be widely used in clinical practice.