Tan H K, Hooper P M, Buttar I A, Wolfaardt J F
Department of Restorative Dentistry, University of Alberta, Edmonton, Canada.
J Prosthet Dent. 1993 Dec;70(6):532-7. doi: 10.1016/0022-3913(93)90267-r.
This study evaluated the effect of disinfection time (10, 30 and 60 minutes) on the dimensional changes of stone casts poured against an irreversible hydrocolloid impression material (Jeltrate). Impressions were made of a stainless steel analog of a maxillary arch. The impressions were sprayed with bleach, iodophor, phenol, and water and were stored for designated times before poured in a type IV stone (Vel-mix). The arch width, length, and depth of the vault of the resultant casts were measured by use of a contact measuring device (MicroVal) capable of measuring to 0.0001 mm. Data were analyzed with two-way analysis of variance at the 95% confidence level. Results indicated that disinfection treatment of alginate impressions with surface disinfectants did not cause significant dimensional changes in the resultant stone casts from statistical and clinical points of view.
本研究评估了消毒时间（10分钟、30分钟和60分钟）对用不可逆水胶体印模材料（Jeltrate）灌注的石膏模型尺寸变化的影响。对上颌牙弓的不锈钢代型制取印模。将印模喷洒漂白剂、碘伏、苯酚和水，并在指定时间储存，然后灌注IV型石膏（Vel-mix）。使用精度可达0.0001毫米的接触式测量装置（MicroVal）测量所得模型的牙弓宽度、长度和腭穹深度。在95%置信水平下用双向方差分析对数据进行分析。结果表明，从统计学和临床角度来看，用表面消毒剂对藻酸盐印模进行消毒处理不会使所得石膏模型产生显著的尺寸变化。
