Direct Filling Golds: An In-Vitro Study of Microleakage as a Function of Condensation Force: An In-Vivo Study of Marginal Quality
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
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The purpose of this investigation was to determine the sealing ability of three types of direct filling golds inserted into class V cavity preparations using four different ranges of condensation force. An in-vivo study of the marginal quality of restorations of three types of direct filling golds was also initiated. Class V preparations were made in 120 extracted anterior and premolar human teeth. Three direct gold filling materials and four different condensation force ranges were used in restoring the teeth. The filling materials used were Electraloy R.V., a gold-calcium powdered alloy Goldent and Improved Goldent, two pure powdered golds. The condensation force ranges used were 4-6 lbs, 6-8 lbs, 8-10 lbs, and 10-12 lbs. The teeth were subjected to temperatures of 10 and 50 C alternately for 1250 cycles. Ca45 was used to detect the microleakage of the restorations. Ridit analysis was employed to evaluate the degree of microleakage. Statistical analysis was done by a factorial analysis of variance and the Newman Keuls sequential range test. The results were as follows No significant relationship was found between the condensation force ranges used and the degree of microleakage with each direct gold restorative material and At each condensation force range, the gold-calcium alloy displayed less microleakage than either of the powdered golds. A statistical analysis showed that this microleakage difference was highly significant. No significant differences were found between the microleakage patterns of the two powdered golds.
- Anatomy and Physiology
- Medicine and Medical Research
- Metallurgy and Metallography