The prepared vital abutments were protected by a provisional custom made FPD luted with a temporary luting cement (Provicol) for 14 days.
The mean sensitivity response for both cements i.e the glass ionomer luting cement and the resin based luting cement decreased gradually at each follow up appointment.
This is to say that irrespective of the type of luting cement used the mean sensitivity score of anterior teeth was greater than that of the posterior teeth at all four appointments i.e.
The insignificant P- values (Pgreatre than 0.05) at all appointments in both anterior and posterior abutments of fixed partial denture with either resin based or glass ionomer luting cement exhibited that there was no difference between the two cements in terms of post cementation sensitivity.
The superficial oxygen inhibition layer formed during curing of a dentine bonding resin in the presence of oxygen ensure that su perficial free methacrylate groups could react with monomers of the luting composites.
Effect of HEMA containing dentine desensitizers on shear bond strength of a resin luting cement.
Bonding of adhesive resin luting agents to metal and amalgam.
Resin luting cements are difficult to use and are expensive but provide better bonding with tooth struc- ture/fitting surface of indirect restorations.
As per this study glass ionomer cement is more soluble than Zinc Phosphate cement which is in con- trast to previous studies therefore more studies both in vitro and vivo are needed to be carried out prior to recommend zinc phosphate cement a preferable luting material.
1 Richard Van Noort Introduction to dental materials 3rd ed Luting Agents P:269, Mosby 2007