We will have limited operations from 15:00 Wednesday 24 December 2025 (AEDT) until Friday 2 January 2026. Find out how to contact us during the holiday period.
Medical devices can be designed and manufactured, or modified, to suit a specific person. These devices are called personalised medical devices.
This page introduces the 3 types of personalised medical devices and their regulatory requirements. Detailed information about each topic, including practical examples from the dental and allied health sectors, can be found in the Resources and guidance section.
Definitions and examples
Personalised medical devices are medical devices that are designed and manufactured, or adapted/modified, to meet the needs of an individual.
We categorise personalised medical devices into 3 types:
- Adaptable medical devices
- Patient-matched medical devices (PMMDs)
- Custom-made medical devices (CMMDs)
Adaptable medical devices
Adaptable medical devices are personalised after they are manufactured.
They are modified, adapted or assembled to suit a specific individual. This is done in line with the manufacturer’s instructions.
Examples include:
- A limb prosthesis assembled from pre-manufactured components in line with the manufacturer’s instructions.
- An off-the-shelf bruxism mouthguard, to be moulded by the patient themselves.
- A prefabricated (non-prescription) orthotic insole, shaped and trimmed to the right size for a patient.
Patient-matched medical devices
Patient-matched medical devices (PMMDs) are personalised before they are manufactured.
They are manufactured to match the anatomical or physiological features, or pathological condition, of an individual. This is done within a specific design envelope, using production processes that can be validated and/or verified and reproduced.
Examples include:
- A dental aligner that is designed in a software suite to fit a specific person.
- A wrist splint that is designed and moulded to match a specific person’s anatomy.
- A maxillofacial plate that is designed and 3D-printed to suit an individual’s precise defect.
Design envelope
The design envelope is a set of parameters, within which the device can be tailored (matched) to a specific person, while ensuring the device:
- is safe,
- is fit for its intended purpose, and
- meets the intended recipient's needs.
These parameters (or factors) may include:
- minimum and maximum dimensions
- performance limits
- allowable environmental limits for operation
- specifications for materials and their properties.
Custom-made medical devices
Like a PMMD, a custom-made medical device (CMMD) is designed and made for a particular person. Unlike a PMMD, a CMMD is so rare and unique that the manufacturer cannot adequately and fully validate the design or production processes used. A health professional may determine that a CMMD is needed when no other device like it is included in the Australian Register of Therapeutic Goods (ARTG).
An example is an acetabular implant made for a person who is 2.26 metres tall and weighs 160 kilograms. The dimensions and tolerances of the implant needed to suit this person are outside the manufacturer’s usual design envelope. The implant is genuinely a ‘once-off’ and therefore is a CMMD.
Use the decision tree below to help you decide what type your medical device is.