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Sterilisation and Infection Control at Calm Dental

The short answer

Every instrument that touches you is either single-use and discarded, or sterilised in a vacuum autoclave, sealed in an individual pouch, and opened in front of you. Every autoclave cycle is logged and verified with a chemical indicator, and a biological spore test is run weekly. You are welcome to ask to see any of it.

Autoclave
Vacuum, pouched
Cycle verification
Every load
Spore test
Weekly
Licensing
HCSA, MOH standards

What happens to an instrument between patients

  1. Separated at the chair. Sharps go straight into a rigid container. Single-use items are discarded. Reusable instruments go into a sealed transport container, never carried loose.

  2. Cleaned before sterilising. Debris is removed by ultrasonic bath or washer-disinfector. This step matters: an autoclave cannot sterilise through blood or cement, so cleaning is what makes sterilising possible.

  3. Inspected and pouched. Each instrument or set is checked under light for residue and damage, then sealed in an individual pouch with a chemical indicator and dated.

  4. Autoclaved. A vacuum cycle, which removes air so steam reaches hinges, hollows and handpiece lumens — the places a simple steam cycle misses.

  5. Checked and logged. The indicator is read on unloading. The cycle is recorded. A failed or ambiguous indicator means the whole load is reprocessed, not judged by eye.

  6. Stored sealed, opened in front of you. The pouch stays closed until your appointment. If it is open, damp or damaged when it reaches the chair, it goes back.

The rest of the room

Handpieces (drills)Sterilised between every patient, not wiped. Each surgery holds enough handpieces that no cycle is ever rushed.
WaterlinesFlushed between patients, purged at the start and end of the day, and disinfected on a scheduled cycle to prevent biofilm.
Surfaces and chairWiped with hospital-grade disinfectant between patients, with barrier films on the switches, light handles and headrest that hands touch mid-treatment.
AerosolsHigh-volume suction at the tooth for anything that generates spray, plus rubber-dam isolation for restorative work — which also keeps the field clean and dry for bonding.
Single-use onlyNeedles, scalpel blades, suction tips, saliva ejectors, gloves, masks, bibs, cups, polishing cups and brushes, matrix bands, impression tips.
RadiographySensors sheathed for each patient and the sheath discarded. See 3D scans and X-rays.
WasteClinical and sharps waste segregated at source and collected by a licensed contractor.
Vaccination and screeningClinical staff immunised against hepatitis B and following standard precautions with every patient, no exceptions and no assumptions.

Why we are writing this down

Most people never ask about sterilisation, and the ones who want to ask often feel awkward doing it. So here it is in writing instead: not a promise about how much we care, but the actual routine, in the order it happens, so you can check it against what you see in the room.

Two things follow from that. If something looks wrong — an open pouch, a surface not wiped, an indicator you want to look at — say so, to anyone in the clinic. And if you have a bloodborne infection, tell us because it is relevant to your care, not because it changes our precautions. It does not. The protocol is the same for every patient, which is the only version that works.

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Questions

Are instruments used on more than one patient?

Instruments that can be sterilised are, in a vacuum autoclave, sealed in an individual pouch, and the pouch is opened in front of you at the start of your appointment. Anything that cannot be reliably sterilised — needles, blades, suction tips, gloves, bibs, polishing cups, matrix bands — is single-use and discarded.

How do I know the autoclave is actually working?

Three ways, and all three are recorded. Every pouch carries a chemical indicator that changes colour only if the correct temperature, pressure and time were reached. Every cycle is logged. And a biological spore test is run weekly — live spores put through a cycle and cultured, which is the only test that proves the machine kills organisms rather than merely got hot.

What about the water in the drill and the rinse cup?

Dental unit waterlines are the part of a clinic nobody thinks about and the part most worth asking about. Ours are flushed between patients, disinfected on a scheduled cycle, and the units are purged at the start and end of each day. Biofilm in a waterline is a real risk in dentistry and it is managed by protocol, not by hoping.

Do you follow a national standard?

Yes. Singapore clinics are licensed under the Healthcare Services Act and inspected against it, and our protocols follow the Ministry of Health infection-control requirements and standard dental sterilisation practice. Being licensed is the floor, not a distinction — every clinic has to meet it. What differs between clinics is how the daily routine is actually run.

Can I watch, or ask what something is?

Yes, and people do. If you want to see the pouch opened, the indicator strip, or the autoclave logbook, ask. Nothing about this is confidential and there is nothing we would rather you did not see.

Why does this matter for a routine cleaning?

Because the risk in dentistry is not dramatic, it is cumulative — blood and saliva, aerosols, and instruments that touch bone and gum. The protocols exist so that a routine appointment carries no more risk than the surgery it looks like. Consistency on ordinary days is the whole point.

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