Department of Prosthodontics, Malmö University, Faculty of Odontology, Malmö, Sweden.
J Prosthodont. 2019 Feb;28(2):e609-e616. doi: 10.1111/jopr.12795. Epub 2018 Apr 17.
To validate the well-known and often-used impression replica technique for measuring fit between a preparation and a crown in vitro.
The validation consisted of three steps. First, a measuring instrument was validated to elucidate its accuracy. Second, a specimen consisting of male and female counterparts was created and validated by the measuring instrument. Calculations were made for the exact values of three gaps between the male and female. Finally, impression replicas were produced of the specimen gaps and sectioned into four pieces. The replicas were then measured with the use of a light microscope. The values received from measuring the specimen were then compared with the values received from the impression replicas, and the technique was thereby validated.
The impression replica technique overvalued all measured gaps. Depending on location of the three measuring sites, the difference between the specimen and the impression replicas varied from 47 to 130 μm.
The impression replica technique overestimates gaps within the range of 2% to 11%. The validation of the replica technique enables the method to be used as a reference when testing other methods for evaluating fit in dentistry.
验证常用于测量预备体和冠之间适合性的知名印象复制技术。
验证包括三个步骤。首先，验证测量仪器以阐明其准确性。其次，通过测量仪器创建和验证由男性和女性对照组成的样本。计算男性和女性之间三个间隙的精确值。最后，制作样本间隙的印象复制件并将其切成四部分。然后使用显微镜测量复制件。从测量样本中获得的值与从印象复制件中获得的值进行比较，从而验证该技术。
印象复制技术高估了所有测量的间隙。根据三个测量点的位置，样本和印象复制件之间的差异在 47 到 130 微米之间。
印象复制技术高估了 2%至 11%范围内的间隙。复制技术的验证允许该方法在测试其他用于评估牙科适合性的方法时用作参考。
