Dear editor

In light of the discussions in the literature of repair verses replacement I was interested to see the very useful technique tip in the January 2017 issue, where the ‘Cojet technique’ was used alongside a universal bonding agent containing silane.

Whilst there are no clinical evaluations of the long-term effectiveness of this technique, I thought the readers might like to see a repair effected on the distal retainer of a four unit bridge 12 years ago (Figure 1). The tooth was isolated and block out resin applied to the remaining ceramic so as not to roughen the surface with the Cojet sand (Figure 2).

At the time there were no bonding agents which contained silane and so, in the case described, the conventional approach using Cojet sand, hydrofluoric acid, silane, bonding agent and composite was employed. The restoration was completed and the patient was happy with the result (Figure 3).