Code | Special-shape | Performance | Advantage | Limitation |
---|---|---|---|---|
CN209595930 [56] | 3D | SS | GCR | Insufficient strength |
CN207400812 [57] | S-shape | SS | GCR | Weak chip removal function |
US10136962 [58] | More curvature | SS | LR | No easy access to the inside of the root canal |
CN209032679 [59] | Helical shape | SS | GC | Out of alignment with the root canal axis |
CN201676027 [60] | Normal | Without two edges | LR | A single type of preparation |
EP2140 828 [61] | Small tip | Three spiral grooves | LR | Small contact area affects cutting performance |
CN211460595 [62] | Optimized tip | Two special surfaces | GCR | Non-streamline design tends to cause steps |
CN203724240 [63] | Vertical cutting pattern | Vertical | NCE | Vertical grain affects chip removal efficiency |
CN209933021 [64] | Multiple spiral grooves | Many | GCR | Too many spiral grooves affect the strength of the files |
CN203943750 [65] | N/A | Left-hand blade | NCE | Left-handed blades are not versatile for users |
US11083539 [66] | Tubular | Zigzag structure | NCE | Large size and inconvenient operation |
CN109498186 [67] | Composite cutting edges | Discontinuous | NCE | The spiral groove is in the opposite direction of the cutting edge |
CN213552491 [68] | Multi-pronged cone | Spiral | GCR | Not easy to control when rotating at a high speed |
CN211884087 [69] | Smooth | None | IS | No cutting edge leads to poor cleaning ability |
US20100119990 [70] | Interrupted shapes | Discontinuous | NCE | Continuously interrupting spiral grooves affect chip removal |
EP3170471 [71] | Spiral wound wire sets | Discontinuous | NCE | Spiral wound wire sets may not be strong enough to bond with the substrate |
CN206518609 [72] | Improved handle | Change to the universal handle | GV | Difficult to expand the scope of use |
CN211049650 [73] | Improved handle | Extended handle | GV, GVI | The handle is too long to affect the operation |
CN206910406 [74] | Improved handle and blade | Change of angle | GV | Unstable bending part |
CN205339178 [75] | Improved handle | The changed direction of the handle | GV, GVI | Difficult to disassemble |
CN108542513 [76] | Improved handle | Change to floating seat | GC, GV | Unstable force transmission during use |