Most patients never see where dental instruments go between appointments, and many feel awkward asking. There is no need to. Questions about sterilisation, single-use items and instrument tracking are fair at any dental practice, and a practice that runs its systems well can answer them in plain language.
This article is about the infection control systems a practice runs for every patient. It is not about infections such as an abscess or a dry socket after an extraction, which are covered in other articles.
The rules Australian dental practices work to
Several documents set the benchmark. The Australian Guidelines for the Prevention and Control of Infection in Healthcare (2019), published by the National Health and Medical Research Council with the Australian Commission on Safety and Quality in Health Care, set the principles across all healthcare, including dentistry. The Australian Standard AS 5369:2023 covers how reusable medical devices, such as dental instruments, are cleaned, sterilised and stored. The Australian Dental Association's Guidelines for Infection Prevention and Control, now in a fifth edition (2024), bring these together for dental practice.
The ADA's guidelines state that responsibility for infection control rests with each registered dental practitioner and cannot be delegated, and that the Dental Board of Australia expects practitioners to practise in a way that maintains and enhances public health and safety. In New South Wales, a health practitioner regulation that took effect on 1 September 2025 lists dental practitioners among those who must follow prescribed infection control standards, naming AS 5369:2023.
Single-use items are used once, then thrown away
Some items are made to be used on one patient at one visit and then discarded. Needles are the obvious example, and gloves are another; the ADA guidelines are clear that single-use gloves must never be reused or put back on after removal. Manufacturers mark single-use devices with a specific symbol, and those items are never reprocessed.
Reusable instruments are cleaned, then sterilised
Most hand instruments and handpieces are designed to be reused, but only after reprocessing. The first step is thorough cleaning, because blood, saliva or debris left on an instrument can shield microorganisms from the sterilising process. The instruments are then packaged and sterilised in a steam steriliser, often called an autoclave, which uses pressurised steam at a controlled temperature and time.
A steriliser is not simply switched on and trusted. Its cycles are recorded, and practices use test systems to confirm it is working, including biological indicators that contain resistant bacterial spores. If the spores do not survive a cycle, that shows the steriliser can kill highly resistant organisms, not only that the dial reached the right number.
Tracking links your appointment to a steriliser cycle
The ADA guidelines describe batch control identification. Each sterilised pack carries a code that links it to a particular steriliser cycle, and that code is recorded against the patient's treatment. If a cycle were later found to have failed, the practice could identify which instruments and which patients were affected and act on it. Asking whether a practice uses batch tracking is a reasonable question, and the answer should be easy to give.
What you can see for yourself
Some infection control happens in front of you. Between patients, frequently touched surfaces such as the light handle, chair controls and the dental unit are wiped with disinfectant or covered with disposable barriers that are changed each time. Staff wear protective equipment suited to the procedure, which may include gloves, masks, eyewear and gowns. Seeing gloves changed, surfaces wiped and fresh covers applied is a normal part of every appointment, not something special to yours.
Instruments are often opened from sealed pouches in front of the patient. That is a useful sign that they have been through reprocessing and stored properly since.
Questions worth asking, and what a clear answer covers
| Question | A clear answer usually mentions |
|---|---|
| How are reusable instruments sterilised? | Cleaning first, then a steam steriliser (autoclave) |
| Do you track instruments to my appointment? | Batch codes on packs linked to steriliser cycle records |
| Which items are single-use? | Needles, gloves and other items marked single-use, discarded after one patient |
| How do you know the steriliser is working? | Cycle records and regular testing, including biological indicators |
| What happens between patients? | Surfaces disinfected or barrier covers replaced |
| Which guidelines do you follow? | The ADA infection control guidelines and AS 5369 |
You do not need to ask technical questions. Asking whether the practice follows the ADA's infection control guidelines, or whether the team has infection control training, is enough to open the conversation. A practice that welcomes the question is generally a good sign. If a practice cannot explain its process simply, that does not prove anything is wrong, but it is reasonable to ask for more detail.
Who does this work
Day-to-day reprocessing is often carried out by dental assistants, under systems the registered practitioners are responsible for. Our article on what a dental assistant can and cannot do explains their role. Oral health therapists work within the same systems, as described in our guide to an oral health therapist's scope of practice.
Items that travel to and from a dental laboratory, such as impressions, crowns and dentures, are also handled under infection control procedures. Our article on why dental lab work gets remade covers some of the handling involved, and if you are comparing public and private care, what public dental will not treat may also help.
Common questions
Are dental needles ever reused?
No. Needles are single-use and are discarded after one patient.
Is it rude to ask my dentist about sterilisation?
Not at all. It is a reasonable question, and most practices are happy to explain their process.
What is an autoclave?
It is another name for a steam steriliser, which uses pressurised steam at a set temperature for a set time to sterilise cleaned instruments.
If you would like to know how we manage infection control, ask any of our team at your next visit, or see our current offers if you are due for a check-up. This article is general information and is not a substitute for asking your own dental practice about its specific systems.
