De Mourgues F, Llory H
SSO Schweiz Monatsschr Zahnheilkd. 1979 Dec;89(12):1271-3.
In hydrocolloid impressions, the visibility of the margins of cavity preparation is most important. Purely mechanical management of the gingival tissue by cotton threads does not always give satisfactory results, particularly in multiple preparations. Electrosurgery, subtly used, avoids blood and seepage from the sulcus and seems to better control the accessibility of the margins to the hydrocolloid material.
在水胶体印模中，洞形预备边缘的可视性最为重要。用棉线对牙龈组织进行单纯的机械处理并不总能取得令人满意的效果，尤其是在进行多个预备时。巧妙使用的电外科手术可避免血液和龈沟渗出物，似乎能更好地控制边缘与水胶体材料的接触情况。
