Overview
ISO 5836:1988 is an international standard specifying the precise dimensions and tolerances for holes in metal bone plates used in surgical implants. This standard is essential for ensuring compatibility and secure fixation of bone plates with screws that feature asymmetrical threads and spherical under-surfaces, in accordance with screw standards defined in ISO 5835. Notably, ISO 5836:1988 focuses solely on hole specifications rather than the overall shape, size, or hole spacing of the bone plates.
Developed by ISO Technical Committee TC 150 for surgical implants, this standard promotes uniformity and reliability in orthopedic implant manufacturing, helping to improve surgical outcomes and device performance.
Key Topics
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Hole Dimensions and Tolerances
ISO 5836:1988 defines four types of holes (Type A, B, C, and D) categorized by their shape-cylindrical, conical, threaded, and with spherical countersinks-to accommodate screws with asymmetrical threads and spherical under-surfaces. Each hole type includes detailed dimensional parameters and tolerance limits to ensure precise screw fitting.
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Compatibility and Interoperability
The standard guarantees that the holes in bone plates correspond accurately to screws compliant with ISO 5835. This interrelationship facilitates correct fixing of implants, reducing risks of loosening or misalignment during orthopedic surgery.
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Adjustments for Plate Thickness
ISO 5836 addresses how hole dimensions should adapt when plate thickness varies from a reference measurement, maintaining implant strength and preventing screw head protrusion.
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Annex A – Standards Interrelationship
This annex provides a schematic overview of related ISO standards addressing bone screws (HA, HB, HC, HD types), bone plates, and surgical tools, illustrating the integration within the comprehensive orthopedic implant standardization framework.
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Annex B – Bibliography
Annex B lists key related ISO standards relevant to surgical implants, bone screws, and orthopedic instruments, serving as a valuable reference for practitioners and manufacturers.
Applications
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Orthopedic Implant Manufacturing
ISO 5836:1988 guides manufacturers in designing bone plates with precisely sized holes, guaranteeing compatibility with standardized screws. This improves product quality and consistency across global markets.
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Surgical Implant Fixation
Surgeons rely on bone plates manufactured according to ISO 5836 to ensure optimal fixation with screws that engage securely, enhancing mechanical stability during bone healing.
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Regulatory and Quality Assurance
Compliance with ISO 5836 supports regulatory approval processes and quality control for medical devices, helping suppliers meet international medical standards and foster patient safety.
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Medical Device Research and Development
Engineers and designers utilize the standard to innovate new bone plate designs while retaining compatibility with existing screw systems, facilitating advancements in orthopedic surgery.
Related Standards
- ISO 5835 – Implants for surgery – Metal bone screws with hexagonal drive connection and spherical under-surface of head – Dimensions
- ISO 6475 – Implants for surgery – Metal bone screws with asymmetrical thread and spherical under-surface – Mechanical requirements
- ISO 8319-1 & ISO 8319-2 – Orthopaedic instruments – Keys and screwdrivers for different screw head types
- ISO 9269 – Implants for surgery – Metal bone plates holes and slots for screws with conical under-surface
- ISO 9585 – Orthopaedic instruments – Drilling instruments such as drill bits, taps, and countersinks
- ISO 9714-1 – Orthopaedic instruments and related tools (in preparation)
For professionals in orthopedic device manufacturing, surgical practice, or medical regulatory affairs, ISO 5836:1988 offers a critical framework ensuring reliable, interchangeable, and high-quality surgical bone implants, emphasizing hole specifications for screws with asymmetrical threads and spherical undersurfaces.
Open preview (PDF)Implants for surgery — Metal bone plates — Holes corresponding to screws with asymmetrical thread and spherical under-surface
