| Implant system compatibility | Connection type, driver interface, and approved use with the intended implant components. | Compare the wrench and driver specifications with the component instructions for use (IFU); confirm engagement without wobble or slipping. | Choose only a wrench explicitly compatible with the implant system and the intended clinical procedure. | Compatibility reference, IFU version, and instrument identification. |
| Torque range and units | Specified operating range and whether readings are expressed in N·cm or another unit. | Check markings and documentation; ensure the target torque is within the instrument’s stated range. | Do not use a wrench outside its specified range. Follow the implant manufacturer’s instructions for the required torque. | Specified range, unit, and applicable procedure reference. |
| Torque accuracy | Manufacturer-stated accuracy or tolerance, calibration requirements, and verification method. | Use a suitable, in-date torque tester according to the wrench IFU. Test at the points and frequency specified by the manufacturer. | Accept results only against the stated tolerance and testing procedure; remove from service if results fall outside limits. | Test date, tester identification, measured values, acceptance limits, and operator. |
| Repeatability and operation | Consistent torque delivery, clear release or indication, and smooth movement. | Operate the wrench as directed and check for sticking, abnormal noise, delayed release, or inconsistent readings. | Do not rely on an instrument that behaves inconsistently, even if its exterior appears undamaged. | Functional-check results and any reported irregularities. |
| Sterilization compatibility | Validated cleaning and sterilization method, temperature limits, disassembly instructions, and cycle restrictions. | Review the device-specific IFU and the sterilizer instructions; confirm that the intended cycle is validated for the instrument. | Follow the specified reprocessing instructions. Do not assume all wrenches tolerate the same cycle or parameters. | Reprocessing procedure, cycle record, and any required load documentation. |
| Cleaning access | Whether the instrument must be disassembled and whether joints, openings, or detachable parts can be cleaned effectively. | Inspect all accessible surfaces after cleaning; follow the stated disassembly and inspection steps. | Choose a design that staff can reprocess consistently using the clinic’s validated workflow. | Cleaning checklist and inspection findings. |
| Materials and corrosion resistance | Material-care instructions and restrictions on detergents, chemicals, or processing conditions. | Inspect for corrosion, pitting, discoloration, cracks, or damaged markings after reprocessing. | Remove damaged or corroded instruments from service and follow the manufacturer’s assessment or replacement guidance. | Inspection results, damage reports, and service actions. |
| Maintenance and calibration interval | Manufacturer-recommended inspection, lubrication, servicing, and calibration intervals. | Compare usage and reprocessing history with the specified schedule; arrange verification by an appropriate service provider when required. | Use the device-specific schedule rather than applying a generic interval to every wrench. | Usage log, service history, calibration or verification dates, and next due date. |
| Identification and traceability | Readable model or instrument identification, serial or lot details where provided, and status labeling. | Confirm the instrument can be distinguished from similar tools and linked to its maintenance and verification records. | Do not use an instrument whose identity or service status cannot be confirmed. | Inventory entry, identification details, and current status. |
| Final selection | Compatibility, accuracy verification, reprocessing requirements, usability, and available service support. | Review the IFU, test documentation, sterilization workflow, and maintenance plan before purchase or clinical use. | Select the wrench that meets the clinical requirements and can be accurately verified, safely reprocessed, and maintained. | Selection rationale, approved workflow, and responsible reviewer. |