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[Causes and management of gingival coloration caused by metal ceramic crows]
1Department of Dentistry, Ruijin Hospital, Shanghai Second Medical University, Shanghai 200025, China.
Objective:
To analyse the marginal gingival coloration caused by metal based ceramic crowns in 28 patients,and to explore the methods to remove or reduce this abnormal coloration.
Methods:
28 patients with metal based ceramic crowns developed gingival coforation. The period of wearing crowns ranged from 2 weeks to 3 years. To remove or reduce gingival coloration,the original metal based ceramic crowns were discarded. Temporary plastic crowns were utilized for 2 weeks. The cervical ceramic approach was used for rehabilitation,or the abutments were re-prepared for metal based ceramic crowns.
Results:
At the end of follow up,gingival coloration disappeared in patients managed with cervical ceramic approach. While in patients managed with second metal crowns, gingival coloration was improved greatly.
Conclusion:
Gingiral coloration can be removed or reduced by cervical ceramic approach or re-fabrication of metal based ceramic crowns.
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