수종의 레진접착 고정성 국소의치의 설계에 따른 탈락 저항성 평가 = Evaluation of dislodgement resistance of various resin-bonded fixed partial dentures : an In Vitro Study

다국어 초록 (Multilingual Abstract)

The purpose of this study was to evaluate the dislodgement resistance of new types of resin bonded fixed partial dentures (RBFPDs), compared with conventional RBFPD, modified RBPFD using various modifications in the tooth preparation designs with mechanical loading and thermal cycling clinically corresponding to one year period.
Forty blocks were made using artificial teeth corresponding to the mandibular left second premolar and second molar. Each blocks were divided into four groups according to design (n=10). Every specimens were prepared according to the design, and the prosthesis was fabricated according to the conventional method. The prosthesis were cemented with resin cement according to the manufacturer's instructions. And half of the speimens were processed using chewing simulation (240,000 cycles, 50 N load, 1.7 Hz.) and thermocycling (temperatures: 5-55℃, dwelling time: 30s) and the remaining 20 specimens didn't apply any treatment. Then 40 blocks were stained with 2% methylene blue solution for 24 hours, and the premolar and molar sites were sectioned mid-lingual to mid-buccal surface. After the section was performed, the length of dye penetration area was divided by the length of the overall length under the prosthesis to calculate the percent of dye penetration. The data were statistically analyzed with Kruskal-Wallis test, followed by Mann-Whitney test (P<.05).
Without artificial aging, there was no significant difference in dye penetration percent. The dye penetration percent ​​after artificial aging were lower in group C and group D than in group A and group B, and there was no significant difference in dye penetration percent ​​according to molar and premolar in each group.
In this limited experiment, a 3-unit RBPFD and a 2-unit RBPFD using original tooth undercuts, compared with the conventional design of RBPFD and modified RBPFD, have significantly lower microleakge (P<.05).

목차 (Table of Contents)

• Ⅰ. 서론 1
• Ⅱ. 연구 재료 및 방법 3
• Ⅲ. 연구 결과 9
• Ⅳ. 총괄 및 고찰 17
• Ⅴ. 결론 20
• 참고문헌 21
• 영문요약 24