Mamoun John, Salamah Mohammed
International Congress of Oral Implantalogists, USA.
Dent Assist. 2010 Jan-Feb;79(1):13-4, 36-7.
The dry angle is a thin, triangle-shaped piece of moisture-absorbing cellulose that is placed over the buccal mucosa. It absorbs parotid gland saliva and some mandibular saliva, and helps to maintain a dry working field. It is an adjunct to rubber dam isolation and can facilitate dry field isolation in ways that cotton rolls cannot. Its thinness allows it to be placed in the thin space between the maxillary second molars and the ramus aspect of the mandible and sometimes it may be the most practical tool for isolating second molars for bonding or cementation procedures. When slightly moistened with parotid saliva, the dry angle adheres to the surface of the buccal mucosa. It replaces the flabby surface of the buccal mucosa with the stif surface of the dry angle. This prevents suctioning of the mucosa by the high volume evacuator (HVE) suction tip, aids in retraction of the mucosa and increases the number of ways that instruments can be positioned intraorally without obstruction from the HVE suction tube. This article explains the clinical techniques and use of the dry angle in general dentistry.
干角是一块薄的、三角形的吸湿纤维素片，放置在颊黏膜上。它吸收腮腺唾液和一些下颌唾液，并有助于保持手术区域干燥。它是橡皮障隔离的辅助工具，能以棉卷无法做到的方式促进术区干燥隔离。其薄度使其能够放置在上颌第二磨牙与下颌升支之间的狭小空间内，有时它可能是用于第二磨牙粘结或粘固操作时隔离的最实用工具。当被腮腺唾液稍微浸湿时，干角会粘附在颊黏膜表面。它用干角的硬质表面取代了颊黏膜的松弛表面。这可防止大容量吸引器（HVE）吸头抽吸黏膜，有助于黏膜的牵拉，并增加了器械在口腔内放置时不受HVE吸引管阻碍的方式。本文解释了干角在普通牙科中的临床技术和应用。
