Contrast study on the clinical effects of electrosurgical retraction and secondary gingival retraction / 重庆医科大学学报

ABSTRACT

Objective:To observe and compare the clinical effects of electrosurgical retraction and secondary gingival retraction in fixed prosthodontics.Methods:68 teeth of 36 patients undergoing crown and bridge restoration were randomly distributed into 2 groups.Secondary gingival retraction and electrosurgical retraction were adopted to perform gingival retraction,take impression in sequence and make master cast respectively.Then,the time of gingival retraction and shoulder of preformed teeth,gingival condition and master cast were evaluated after gingival retraction.Results:25 of 33 teeth performed with secondary gingival retraction reached satisfactory level,while 8 teeth were unsatisfactory,with the satisfactory rate of 75.8%.28 of 35 teeth performed with electrosurgical retraction were satisfactory,but 7 teeth were not satisfactory,with the satisfactory rate of 80.0%.Time of gingival retraction by this two methods showed significant statistical difference,while the effects have no statistical difference.Conclusion:Electrosurgical retraction is a relatively good way of gingival retraction and worthy of clinical application because of easy and simple handling,easy exposure of clear dividing line between soft and hard tissue,satisfactory effects of gingival retraction,and quick recovery after surgery.