2019 年 10 巻 1 号 p. 14-19
It is not unusual for a crack in the enamel to be found with proximal caries in the molar region and for caries to extend along the crack to below the gingival margin. However, when restoration by means of the indirect method is carried out for caries located on the proximal surface, an excessive amount of tooth material needs to be cut away and there is a danger that this can markedly reduce the strength of the remaining material. The direct method of restoration with composite resin is therefore desirable. Restoration of appropriate proximal contact and marginal conformity are essential with direct method restorations using composite resin, and there are a number of different methods. Among these, the method using a sectional matrix and separation ring may be optimal, but it cannot be used if the area of application is confined and caries extends below the gingival margin. Here, we report a two-stage method, in which the subgingival region is filled and then the proximal contact region is filled, through an actual clinical case.
