Effect of restoration margins on the biologic width

ABSTRACT

Preserving the biologic width is critical when restoration of the teeth involves placing restorative margins in an area which could encroach on the dentogingival complex. In cases where the clinician is forced to submerge the restorative margin subgingivally in an attempt to reach healthy tooth structure, the dentogingival complex can easily be violated if the concept of biological width is not respected. A tooth prepared in such a manner will result in pathological periodontal response due to impingement of the junctional epithelium and connective tissue attachment. Various unfavorable clinical situations will develop from this response. Such undesirable alterations may include chronic periodontal inflammation with possible subsequent loss of periodontal attachment, resulting in deep periodontal pocket highly susceptible to future breakdown. The objective of this article is to highlight the importance of the biologic width in relation to restoration margins. Appropriate preventive measures should be considered in advance to restorative work and a careful approach for the periodontal health will contribute to the long term stability and success of the restored dentition