Comparison of the clinical effect between two gingival retraction techniques

Objectives: To compare the clinical effect of gingival retraction cord and gingival retraction paste.To make sure if gingival retraction paste is more easily acceptable by both the patients and the dentists. Methods: 198 teeth in 151 patients were chosen .During the procedure of tooth preparation and impression ,gingival retraction cord and paste were used respectively. Operation time was recorded. Whether or not the uncomfortable feelings showed by the patients was observed.The effects of the impression were evaluated. Results: These two gingival retraction techniques could both achieve good results on the impression effects.But obvious differentiations were showed in the operation time and the extent of pain. Conclusions: These two gingival retraction techniques can both relieve the injury and bleeding of the gingival tissue during the tooth preparation and can also help to acquire the clean and clear impression. But the gingival retraction paste featureshas more convenient operation and the ideology of no pain, which is more easily accepted by both the patients and the dentists.