OBJECTIVE: The objective of this in vitro study is to assess the bond between titanium and various ceramic materials as well as the failure load, and fatigue of bonded abutment materials.
MATERIALS AND METHODS: Part I: A titanium pin (Grade V Ti alloy, 6.4 mm high, 8.2° taper) was scanned using the Sirona Inlab scanner software version SW4.2.5.
A crown (tooth #19) was designed to fit the pin and machined using four crown materials (Ivoclar e.max, Vita Enamic, Vitablocs Mark II, and Sirona inCoris zirconia).
Pins were held in a CNC machine to reproducibly sandblast each pin at the same speed and pressure (100 psi, Prepstar) using 125 micron alumina and then cleaned in an ultrasonic bath.
The milled crowns were cemented to the pins using three different cements (3M/ESPE RelyX Ultimate, Ivoclar Multilink Hybrid, and Kuraray Panavia V5). A load of 1190 grams was placed on the crowns to achieve uniform cementation.
Two cementing techniques were used for each cement, one with no treatment (no primer/no etch) and the other with treatment as recommended by the manufacturer (primer/etch). Design of Experiment (DOE) was used to determine the testing sequence and the specimen number.
A pull out test was applied to all specimens using a universal mechanical testing machine (Instron 5566A) at a crosshead speed of 1mm/min. Load at failure was recorded for each specimen. Data were analyzed by factorial regression model using JMP Pro 13.
Part II: In the second part of the study TiBases were cemented to the crowns using two cement combinations (RelyX Ultimate with no treatment, and Multilink Hybrid with treatment) based on the results from part I.
After cementation specimens were subjected to cyclic loading by pneumatic powered cylinder with an electronic control device (Pober Industries, Waban MA). The load applied on each specimen was 500 N (maximum compressive force) for 200,000 cycles. A pull out test was applied on all specimens.
RESULTS: Retention strength by cement, treatment and material Bar graph of retention strength by cement type, crown material and fatigue.
CONCLUSION: Overall retention values were lowest for zirconia and highest for e.max and Enamic.
In general, primer/etch technique produced significantly higher values than no primer/etch.
For RelyX cementation, no primer/etch produced significantly higher retention.
Maximized desirability of retention load is for Enamic cemented with Multilink hybrid with primer/etch, although there is no statistically significant difference between the values for Enamic and e.max with Multilink hybrid cement primer/etch.
| Identifer | oai:union.ndltd.org:bu.edu/oai:open.bu.edu:2144/42845 |
| Date | 05 August 2021 |
| Creators | Shembesh, Marwa A. |
| Contributors | Giordano II, Russell |
| Source Sets | Boston University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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