Abstract
BackgroundArthroscopic shavers play an indispensable role in arthroscopic debridement. They have exquisite structures and similar designs. The purpose of this study was to establish a reproducible testing protocol to compare the resection performance and the quality (tensile strength, torsional strength, and corrosion resistance) of different arthroscopic shavers with comparable designs. We hypothesized that there could be little difference in resection performance and quality between these shavers.MethodsIncisor Plus Blade (IPB; Smith & Nephew, Andover, MA) and Double Serrated Plus Blade (DSPB; BJKMC, Shanghai, China) were selected for resection performance and quality test. For resection performance testing, the resection torque, which is the minimum torque required to cut off silicone blocks with the same cross-sectional area, was measured to evaluate the resection performance of shaver blades when the other factors remain the same. For quality testing, tensile and torsion tests of the shavers’ joint part were performed, and ultimate failure load and maximum torque were measured and compared. The corrosion resistance of these blades was assessed by the boiling water test based on the ISO13402.ResultsNo significant difference existed in the resection torque between the shaver blades of IPB and DSPB (P = 0.54). To the failure load of shavers’ joint parts, IPB was significantly higher than DSPB, both in the outer and inner blades (P < 0.0001). The maximum torque of the joint part had no significant difference between IPB and DSPB (for inner blades P = 0.60 and outer blades P = 0.94). The failure load (for both IPB and DSPB P < 0.0001) and maximum torque (for IPB P = 0.0475 and DSPB P = 0.015) of the inner blades were higher than those of the outer blades. No blemishes were observed on the surface of the blades after corrosion resistance tests.ConclusionsThis study provided some new methods to evaluate the resection performance and quality of different shavers. The resection performance, the torsional strength of the joint part, and the corrosion resistance of IPB and DSPB may show comparable properties, whereas the tensile strength of the shavers’ joint part showed some level of difference.
Highlights
Arthroscopic shavers play an indispensable role in arthroscopic debridement
The shavers produced by different manufacturers vary, but certain structural compositions are common, such as a handpiece with the high-performance motor, arthroscopic shaver blades for cutting tissue, and a power source related to irrigation and suction
No statistical difference existed in the resection torque between Incisor Plus Blade (IPB) (0.00396 ± 0.00033 N·m) and Double Serrated Plus Blade (DSPB) (0.00406 ± 0.00038 N·m;P = 0.54)
Summary
Arthroscopic shavers play an indispensable role in arthroscopic debridement. They have exquisite structures and similar designs. The shaver system plays an indispensable role in arthroscopic surgery. Shaver blades consist of grips, shafts, and tips (Fig. 1). The shafts and tips of the blades are mainly made of metal, while the grips are primarily made of composite plastic. This type of connection structure is sophisticated, and the failure mode is difficult to predict. Different shavers are available in the market They have various sizes (in length and diameter) and shapes (straight, curved, flexible) to meet diverse types of joint surgery. The cutting performance and the design of the surgical tool are as essential as the doctor’s experience and play a vital role in the success of the operation
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