Using the double-cord packing technique of tissue retraction for making crown impressions

The double-cord packing technique is effective and safe for impression taking as long as the following steps are taken: Whenever possible, finish lines should be placed supragingivally. The gingival tissues should always be in good periodontal health. Two knitted cords of different sizes soaked in aluminum chloride solution are used. The first cord should be left in place while making the impression. Retraction cords should never be forced into the sulcus. Always remove both cords before dismissing the patient.