The decay extends down to alveolar bone, pulp is probably non-vital, which may need root canal treatment in order
to rescue the tooth
. However, restoration is difficult.Ideally, crown lenthening is needed in order to establish biologic width. However, after crown lenthening procedure, interdental papilla may recede and there may be black triangle present between tooth#9 and #10, which compromise cosmetic result. In addition, crown-root ratio needs to be considered.