The Effect of a Piezoelectric Ultrasonic Scaler with Curette Tip on Casting Gold Removal in Vitro / 대한치주과학회지

Periodontal debridement is most important procedure in periodontal treatment, because periodontal disease is the biofilm infection. The use of ultrasonic instrument has many clinical advantages compared to classical hand instrument. The introduction of newly developed ultrasonic scaler tips made the use of ultrasonic scaler popular. However the study of tooth substance removal according to the working parameters of ultrasonic scaler with newly developed tips is not sufficient. The purpose of this study is to evaluate the effects of working parameters of piezoelectric ultrasonic scaler with curette tip on casting gold removal. The working parameters was standardized by the sledge device which controls lateral force(0.5 N, 1.0 N, 2.0 N) and power setting was adjusted 2, 4, 8 in P mode and S mode and instrumentation time was 5 seconds. The defect depth and width were measured with profile meter and defect surface was examined by SME. The depth of defect was significantly large in S mode(39.58 +/-19.35micrometer) compared to P mode(8.37 +/-6.98micrometer). There was significant decrease of depth of defect between 1.0N(32.87 +/-27.18micrometer) and 2.0N(14.86 +/-15.04micrometer). The area of defect was also significantly large in S mode(4482.42 +/-3551.71micrometer2) compared to P mode (922.06 +/-960.32 micrometer2). There was significant decrease of area of defect between 1.0N(3889.12 +/-3936.00micrometer) and 2.0N(974.66 +/-986.01micrometer). The change of mode did not effect on the width of the defect. The change of power setting did not effect on the depth, width, and area of defect. In spite of limitation of this study it could be concluded that the use of piezoelectric ultrasonic scaler with curette tip on S mode could make significant tooth substance loss.

The Effect of a Piezoelectric Ultrasonic Scaler with Curette Tip on Casting Gold Removal in Vitro / 대한치주과학회지

Periodontal debridement is most important procedure in periodontal treatment, because periodontal disease is the biofilm infection. The use of ultrasonic instrument has many clinical advantages compared to classical hand instrument. The introduction of newly developed ultrasonic scaler tips made the use of ultrasonic scaler popular. However the study of tooth substance removal according to the working parameters of ultrasonic scaler with newly developed tips is not sufficient. The purpose of this study is to evaluate the effects of working parameters of piezoelectric ultrasonic scaler with curette tip on casting gold removal. The working parameters was standardized by the sledge device which controls lateral force(0.5 N, 1.0 N, 2.0 N) and power setting was adjusted 2, 4, 8 in P mode and S mode and instrumentation time was 5 seconds. The defect depth and width were measured with profile meter and defect surface was examined by SME. The depth of defect was significantly large in S mode(39.58 +/-19.35micrometer) compared to P mode(8.37 +/-6.98micrometer). There was significant decrease of depth of defect between 1.0N(32.87 +/-27.18micrometer) and 2.0N(14.86 +/-15.04micrometer). The area of defect was also significantly large in S mode(4482.42 +/-3551.71micrometer2) compared to P mode (922.06 +/-960.32 micrometer2). There was significant decrease of area of defect between 1.0N(3889.12 +/-3936.00micrometer) and 2.0N(974.66 +/-986.01micrometer). The change of mode did not effect on the width of the defect. The change of power setting did not effect on the depth, width, and area of defect. In spite of limitation of this study it could be concluded that the use of piezoelectric ultrasonic scaler with curette tip on S mode could make significant tooth substance loss.

The Effect of a Piezoelectric Ultrasonic Scaler with Curette Tip on Root Substitute Removal in Vitro / 대한치주과학회지

Based on current evidence in the literature, it is known that endotoxin is a weakly adherent surface phenomenon and that power-driven instruments can be used to accomplish definitive root detoxification and maximal wound healing without overinstrumentation of root and without extensive cementum removal. And one of the newly developed curette tips used with low power of piezoelectric ultrasonic scaler, is effective to remove calculus and not to remove the excessive cementum. The purpose of this study is therefore, to assess the influence of ultrasonic power and various working parameters on root substitute removal when instrumentation is performed with the curette tip on piezoelectric ultrasonic scaler. This study assessed defect depth, width and area resulting from instrumentation using a piezoelectric ultrasonic scaler with a curette type tip in vitro to acrylic resin block as a root substitute. The working parameters was standardized by the sledge device which controls lateral force(0.5 N, 1 N, 2 N) and instrumentation time(5 sec, 10 sec, 20 sec) and power setting was adjusted 0,2,4,8 in P mode. Power setting had the greatest influence on defect depth compared to lateral force and instrumentation time(standardized regression parameter estimates+/-standard error, 0.37+/-0.02, 0.19+/-0.02, 0.07+/-0.02). The effects on defect area also greatest for power setting(0.57+/-0.03) compared to lateral force and instrumentation time(0.33+/-0.03, 0.12+/-0.03). The effect of the power setting on the defect width(0.15+/-0.01) is not so great as defect depth or defect area compared to lateral force(0.12+/-0.01) and effect of instrumentation time is minimal(0.02+/-0.01). It could be concluded that the power setting has the greatest influence on the defect depth and area in curette type tip with low power of piezoelectric ultrasonic device. Many parameters can be adjusted in various situation in clinical use of piezoelectric ultrasonic scaler but the power setting is the first parameter to be adjusted.

The Effect of a Piezoelectric Ultrasonic Scaler with Curette Tip on Root Substitute Removal in Vitro / 대한치주과학회지

Based on current evidence in the literature, it is known that endotoxin is a weakly adherent surface phenomenon and that power-driven instruments can be used to accomplish definitive root detoxification and maximal wound healing without overinstrumentation of root and without extensive cementum removal. And one of the newly developed curette tips used with low power of piezoelectric ultrasonic scaler, is effective to remove calculus and not to remove the excessive cementum. The purpose of this study is therefore, to assess the influence of ultrasonic power and various working parameters on root substitute removal when instrumentation is performed with the curette tip on piezoelectric ultrasonic scaler. This study assessed defect depth, width and area resulting from instrumentation using a piezoelectric ultrasonic scaler with a curette type tip in vitro to acrylic resin block as a root substitute. The working parameters was standardized by the sledge device which controls lateral force(0.5 N, 1 N, 2 N) and instrumentation time(5 sec, 10 sec, 20 sec) and power setting was adjusted 0,2,4,8 in P mode. Power setting had the greatest influence on defect depth compared to lateral force and instrumentation time(standardized regression parameter estimates+/-standard error, 0.37+/-0.02, 0.19+/-0.02, 0.07+/-0.02). The effects on defect area also greatest for power setting(0.57+/-0.03) compared to lateral force and instrumentation time(0.33+/-0.03, 0.12+/-0.03). The effect of the power setting on the defect width(0.15+/-0.01) is not so great as defect depth or defect area compared to lateral force(0.12+/-0.01) and effect of instrumentation time is minimal(0.02+/-0.01). It could be concluded that the power setting has the greatest influence on the defect depth and area in curette type tip with low power of piezoelectric ultrasonic device. Many parameters can be adjusted in various situation in clinical use of piezoelectric ultrasonic scaler but the power setting is the first parameter to be adjusted.