Abstract:

Objective

To evaluate the effect of immediate dentin sealing on the prevention of dentin hypersensitivity after crown restoration.

Methods

Thirty patients received 30 posterior three-unit bridge fixed restorations. Two vital abutment teeth in each patient were allocated randomly into experiment or control groups. Teeth in experiment group （30 teeth） were coated by dentin bonding agent（single bondⅡ） immediately after tooth preparation before making the impression. In control group （30 teeth）， impression was made directly after tooth preparationwithout dentine bonding agent coating. After final restoration cementation， post-operative sensitivity was recorded at baseline （1 week after the insertion） and for recall periods at 1， 6， 12 and 18 months.

Results

Teeth sensitivity in the experiment group were significantly less than those in the control group at 1 week and 1 month after cementation （1 week Z = -1.88，P = 0.03；1 month Z = -2.15， P = 0.02）， whereas there was no significant difference between the two groups at the end of 6， 12， and 18 months. Scores for teeth sensitivity in experiment group were lower than those in group control， at 1 week and 1 month after cementation （1 week P＜0.001，1 month P=0.027）.

Conclusions

The effect of dentin bonding agent in the prevention of dentin hypersensitivity after fixed bridge restoration is significant. In our clinical trail， sealingthe abutmenttooth surface immediately after tooth preparation can effectively reduce the abutment hypersensitivity and reduce the patient discomfort.

Key words: Dentin bonding agent, Immediate dentin sealing, Dentin hypersensitivity