Air Bubble Formation in Alginate Impression Generated by Hand Mixing, Invented Semi-Automatic Machine and Automatic Centrifuge Machine
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Abstract
This study aimed to determine the effect of hand mixing, invented semi-automatic machine and automatic centrifuge machine on air bubble formation in alginate impression material. A total of 45samples was divided into three groups (15 samples per group) by mixing method, then counted and calculated air bubble by NIS-Element BR program. In term of percent area of air bubble formation, Kruskal Wallis and Mann Whitney-U test showed statically significant difference between each group (P< 0.05), 95% CI. In part of quantity, the invented semi-automatic machine had mean of percent of area of air bubbles in alginate sampleless than hand mixing but more than the group of automatic centrifuge machine. The result concluded that the invented semi-automatic machine can be used instead of hand mixing.
Article Details
บทความ ข้อมูล เนื้อหา รูปภาพ ฯลฯ ที่ได้รับการลงตีพิมพ์ในวิทยาสารทันตแพทยศาสตร์ มหาวิทยาลัยขอนแก่นถือเป็นลิขสิทธิ์เฉพาะของคณะทันตแพทยศาสตร์ มหาวิทยาลัยขอนแก่น หากบุคคลหรือหน่วยงานใดต้องการนำทั้งหมดหรือส่วนหนึ่งส่วนใดไปเผยแพร่ต่อหรือเพื่อกระทำการใด ๆ จะต้องได้รับอนุญาตเป็นลายลักษณ์อักษร จากคณะทันตแพทยศาสตร์ มหาวิทยาลัยขอนแก่นก่อนเท่านั้น
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