IADR Abstract Archives
Efficiency of Two Piezo Surgery Inserts for Cortical Bone Osteotomy
Objectives: To compare the cutting efficiency of two different piezo surgery inserts for osteotomy by evaluating the thermal changes and the time required to perform a standardized linear osteotomy.
Methods: Two different piezo surgery inserts, the ST94 serrated tip (Test A) and the ST70Z sword tip (Test B) compatible with the piezo surgery machine OE-F15® (Osada Inc., Los Angeles, California, USA) were used. 80 Osteotomies with 10 mm length, 1.2mm thickness and 3 mm deep were performed in bovine bone disks with similar density to cortical bone. The piezo inserts were replaced after 10 uses. The piezo surgery device was set at 100% power and at two different water volumes (50% and at 100%). Thermal changes and time variations were recorded in real time with a thermocouple system. The effects of the water volume and type of insert on the thermal changes and time necessary to accomplish the osteotomies were evaluated by multiple regression analysis. Statistical significance was set as p<0.05.
Results: Multiple regression analysis revealed no temperature differences during piezo surgery osteotomies when lower volumes of water were used for both groups (P 0.054). Both types of piezo surgical inserts showed similar thermal increases without significant differences between groups (P 0.074). The time analysis indicated that the mean time values necessary to perform linear osteotomies were longer with the sword tip (Test B) (P 0.035).
Conclusions: Within the limitations of this in vitro study, it may be concluded that:
-Water irrigation volume of 50% have similar effect on temperature variations that a water irrigation volume of 100%
-The serrated tip and the sword tip increase the temperature at the same proportion during linear osteotomies.
-The test A (serrated tip) requires less time to perform a linear osteotomy and therefore possesses better cutting efficiency.
Methods: Two different piezo surgery inserts, the ST94 serrated tip (Test A) and the ST70Z sword tip (Test B) compatible with the piezo surgery machine OE-F15® (Osada Inc., Los Angeles, California, USA) were used. 80 Osteotomies with 10 mm length, 1.2mm thickness and 3 mm deep were performed in bovine bone disks with similar density to cortical bone. The piezo inserts were replaced after 10 uses. The piezo surgery device was set at 100% power and at two different water volumes (50% and at 100%). Thermal changes and time variations were recorded in real time with a thermocouple system. The effects of the water volume and type of insert on the thermal changes and time necessary to accomplish the osteotomies were evaluated by multiple regression analysis. Statistical significance was set as p<0.05.
Results: Multiple regression analysis revealed no temperature differences during piezo surgery osteotomies when lower volumes of water were used for both groups (P 0.054). Both types of piezo surgical inserts showed similar thermal increases without significant differences between groups (P 0.074). The time analysis indicated that the mean time values necessary to perform linear osteotomies were longer with the sword tip (Test B) (P 0.035).
Conclusions: Within the limitations of this in vitro study, it may be concluded that:
-Water irrigation volume of 50% have similar effect on temperature variations that a water irrigation volume of 100%
-The serrated tip and the sword tip increase the temperature at the same proportion during linear osteotomies.
-The test A (serrated tip) requires less time to perform a linear osteotomy and therefore possesses better cutting efficiency.