Sterilisation and infection control at Picasso Dental Clinic

Many New Zealand patients researching dental care in Vietnam phrase their concern as “is Vietnam hygienic?” The question is understandable, but it frames the problem incorrectly. Hygiene standards vary as much within any country as they do between countries. A poorly managed clinic in Auckland carries the same infection risks as a poorly managed clinic in Ho Chi Minh City. The operationally relevant question is more specific: does this clinic run a traceable, validated sterile chain from autoclave to chairside?

This page explains what that sterile chain looks like when done correctly, what questions to ask, and what the answers should be.

The right question to ask — not “is Vietnam safe” but “does this clinic run a traceable sterile chain”

Infection control in dentistry is procedural, not geographic. A clinic either validates its sterilisation cycles or it does not. It either tracks instruments from use through reprocessing to re-use, or it does not. It either treats implant surgery as a sterile surgical procedure, or it does not. Country of operation is not the variable that determines this.

The framework that governs these questions is consistent across accredited dental practice worldwide: the Centre for Disease Control’s dental infection prevention guidelines, ISO standards for sterilisation, and the WHO’s five moments of hand hygiene apply to dental clinics in Switzerland, Australia, New Zealand, and Vietnam. The difference is not what the standards say — it is whether a given clinic applies them, documents the application, and can demonstrate that documentation to a patient who asks.

Asking for sterilisation documentation before you book overseas dental treatment is entirely reasonable. If a clinic responds to that request with vague reassurances rather than actual records, treat it as a warning.

What international-standard infection control looks like

A clinic operating to international infection control standards maintains the following:

WHO five moments of hand hygiene. The World Health Organisation defines five specific moments during patient care when hand hygiene must be performed: before touching a patient, before a clean or aseptic procedure, after body fluid exposure risk, after touching a patient, and after touching the patient’s surroundings. In dental practice this translates to glove change protocols, hand wash or alcohol gel use at defined points, and no bare-hand contact with sterile instrument fields. This is observable during your visit.

Validated autoclave cycles with spore testing. Physical indicators (temperature gauges, pressure readings) confirm that a cycle ran. Chemical indicators (colour-change strips inside packs) confirm that steam penetrated the load. Biological indicators — spore tests — confirm that the cycle was sufficient to kill resistant microorganisms. Spore tests are the definitive quality assurance measure. A compliant clinic runs them periodically, records the results, and retains those records. Ask to see them.

Instrument tracking with batch and lot numbers. Each sterilised instrument pack should carry a tracking label that identifies the autoclave load it came from, the cycle parameters, and the operator. This means that if an autoclave failure is detected, all instruments processed in that batch can be identified and recalled. Without tracking, there is no way to know which patients were exposed to a failed sterilisation cycle.

Surface disinfection between patients. All clinical contact surfaces — dental chair controls, light handles, bracket tables, suction attachments — are disinfected between patients using appropriate chemical agents. This is a basic but frequently audited standard.

Personal protective equipment (PPE). Clinicians wear gloves, masks, and eye protection during all clinical procedures. Gloves are changed between patients; masks are changed when visibly contaminated or after aerosol-generating procedures.

Autoclave classes — what you should ask for

Not all autoclaves are equivalent. Understanding the differences lets you ask a specific, informed question.

Class N autoclaves use a simple gravity displacement cycle in which steam enters the chamber and displaces air by gravity. This is effective for solid, unwrapped instruments but cannot reliably sterilise hollow instruments (dental handpieces, implant motors, irrigation cannulas) or porous loads (wrapped instrument packs). Class N is not appropriate as the primary sterilisation method in a clinic performing surgical procedures.

Class S autoclaves are designed for specific loads as defined by the manufacturer. They may incorporate some vacuum functionality, but their scope is more limited than Class B.

Class B autoclaves use a pre-vacuum cycle that removes air from the chamber before steam is introduced. This evacuation step ensures steam penetrates hollow lumens, wrapped instrument packs, and porous materials throughout the load — not just the surface. Class B is the international gold standard for dental clinics performing any surgical work, including implant placement. If a clinic offers implant surgery, it should be operating Class B autoclaves.

When you ask about autoclave class, you are looking for “Class B” as the answer. A clinic that does not know the class of its autoclave, or that responds with a description of the machine’s brand rather than its class, warrants further questioning.

Single-use and reusable items — what Picasso’s policy is

Dental consumables fall into three categories: items that must be single-use only, items that can be reprocessed if validated sterilisation is performed, and items that are single-use by preference for patient safety.

Single-use items at Picasso include all needles and syringes, suction tips, saliva ejectors, dental dams, matrix bands, and implant-related surgical components that come pre-packaged sterile from the manufacturer. These are opened at chairside and disposed of after a single patient.

Reusable instruments — including scalers, explorers, mirrors, forceps, and most handpieces — are reprocessed after each patient through a defined decontamination sequence: ultrasonic cleaning, inspection, packaging in autoclave pouches, sterilisation cycle, and tracked storage.

Implant surgical kits typically contain a mix: the implant fixture itself is a single-use sterile device opened from manufacturer packaging at the time of surgery; the implant motors and drill guides are reusable and must be sterilised to surgical standard.

Implant surgery: a higher bar than routine dentistry

Implant placement is a surgical procedure. It requires a sterile field — the same infection control disciplines applied in a hospital theatre, scaled to a dental operatory. The distinction matters because infection at an implant site does not simply cause pain or require a filling; it can result in implant failure, bone loss, and the need for surgical removal.

At Picasso, implant procedures use sterile draping, sterile implant packaging opened at chairside under direct surgeon supervision, pre-surgical preparation of the operative site, and CBCT-guided surgical planning designed to minimise tissue trauma and reduce the anatomical guesswork that can extend procedure time and exposure.

CBCT imaging is not just a planning convenience — it reduces the need for exploratory tissue manipulation, which in turn reduces contamination risk and procedure length. More on the implant process is at /dental-implants/, with implant brand documentation at /safety/implant-brands/.

Water line management — the overlooked risk

Dental unit waterlines (DUWL) are the internal tubing networks that supply water to dental handpieces, air-water syringes, and ultrasonic scalers. These tubes are narrow, have low intermittent flow, and maintain water at body temperature — conditions that promote bacterial biofilm formation on the interior walls.

Biofilm in dental waterlines has been associated with infections including Legionella in immunocompromised patients, and is a recognised infection control concern documented in literature from Australia, the United States, and Europe. It is not a developing-world-specific problem; it is a plumbing maintenance problem that occurs wherever waterline management protocols are not followed.

Compliant management of dental waterlines includes periodic flushing at the start of each clinical session, use of waterline treatment chemicals or independent water bottles with sterile water, and periodic microbiological testing of waterline output. Ask about DUWL management specifically if you are immunocompromised or will be undergoing a procedure that involves significant irrigation — such as implant placement.

How to verify sterilisation when you visit

If you want to observe or confirm sterilisation standards during your clinic visit, these are the specific things to request:

1. Ask to see the autoclave validation log for the current or previous week, including cycle parameters and operator signatures.
2. Ask when the most recent biological indicator (spore) test was performed and request sight of the result.
3. Ask to see a sample instrument tracking sheet showing lot numbers and sterilisation batch data.
4. Observe whether instruments at chairside are opened from sealed autoclave pouches in front of you.
5. Note whether the clinician performs hand hygiene and changes gloves between contact points.

A clinic that is genuinely operating to standard will produce these records quickly and without defensiveness. Reluctance, inability to locate records, or reassurances that are not backed by documentation are warning signs.

If you are immunocompromised or high-risk

Patients on immunosuppressant therapy, undergoing or recently completing chemotherapy, with uncontrolled diabetes, or with other conditions that reduce immune response should approach elective dental tourism with particular care. The infection risk profile of any surgical procedure is materially different for a person whose immune system cannot mount a normal response to even low-level contamination.

Before booking any elective overseas dental procedure — including routine work — discuss your health status with your New Zealand GP. They can assess whether your current health status is appropriate for travel and elective surgery, and can provide a fitness-to-travel letter that the overseas clinic should review before treatment planning. See /nz-guide/gp-medical-fitness-letter/ for guidance on what that letter should cover.

Some immunocompromised patients are not good candidates for dental tourism regardless of clinic quality. That is an honest medical assessment, not a reason to avoid the question.

Red flags at any clinic

These warning indicators apply to dental clinics in New Zealand, Australia, and Vietnam equally:

• Cannot state the class of their autoclave, or provides a brand name rather than a class designation
• Does not perform biological indicator (spore) testing, or cannot produce records when asked
• No instrument tracking system — sterilised packs have no batch or lot identification
• Instruments are not opened from sealed pouches at chairside in front of you
• Clinicians do not change gloves between patients or between clean and contaminated contact
• Cannot describe their dental unit waterline maintenance protocol
• Dismisses infection control questions as unnecessary concern

Any of these should prompt you to ask more questions before agreeing to treatment — at home or abroad.

Next step

Request a free NZD quote at /free-quote/. If you have existing health conditions that may affect your treatment eligibility, discuss them with your GP first and review /nz-guide/gp-medical-fitness-letter/. Related safety pages: /is-it-safe/ and /safety/honest-risks/.

About this page

Medically reviewed by

Dr. Emily Nguyen

Founding Clinical Director, Picasso Dental Clinic

DDS · Founder and Clinical Director, Picasso Dental Clinic group

Clinical focus: Cosmetic dentistry · Veneers · Smile design

Dr. Emily Nguyen founded Picasso Dental Clinic in 2013 (originally Serenity International Dental Clinic) and led its 2023 rebrand. She sets clinical standards across the group's six branches in Hanoi, Da Nang, Ho Chi Minh City, and Da Lat, and personally reviews cosmetic protocols including the Portrait Sitting workflow for veneers and smile makeovers.

Last clinically reviewed

24 May 2026

Published by

Picasso Dental Clinic

Review policy

Every medical procedure page on this site is reviewed by a named Picasso clinician before publication and re-checked when pricing, materials, or protocols change. Source documents are linked at the bottom of each page.