Belinda Smithwick, Dental Hygienist

Role: Dental Hygienist, Smile Solutions

Qualifications: ADOH (RMIT)

Registration: DEN0002159598 — Dental Practitioner, Dental Hygienist, General Registration

Registration can be verified free on the AHPRA public register at ahpra.gov.au. The hygiene service page is Dental Cleans and Hygienists.

Background

Belinda has worked in the dental industry for over ten years, having begun her career as a dental assistant in 2008.

Committed to ongoing education, she has obtained a Certificate III in Dental Assisting, a Certificate IV in Radiography and a Certificate IV in Oral Health Promotion. It was through those studies that she found her interest in preventive health, and went on to complete an Advanced Diploma in Oral Health at RMIT to qualify as a dental hygienist.

On graduating she received the Golden Scaler award for consistently standing out within her cohort, clinically and academically.

The path from dental assistant to registered hygienist is a real and demanding one, and it is worth noting the distinction it crosses: dental assisting is not a registered occupation in Australia, while dental hygiene is. Qualifying as a hygienist means moving from working under direction to holding independent registration and independent professional accountability.

She has written for the practice on where that preventive interest leads: Health problems linked to poor oral hygiene.

What a dental hygienist is

A hygienist is a registered dental practitioner in their own right — independently registered with the Dental Board of Australia, independently accountable, with their own professional indemnity insurance and continuing professional development obligations, and subject to the same registration standards and complaints process as a dentist.

"Dental hygienist" is a protected title. Ahpra's advertising guidelines set out, profession by profession, the titles the National Law protects; for the dental profession they are "dentist, dental therapist, dental hygienist, dental prosthetist, oral health therapist", and the same five appear again as the divisions of the dental practitioner register (Ahpra, Guidelines for advertising a regulated health service, Tables 1 and 3). Nobody may call themselves a dental hygienist in Australia without holding that registration.

Scope includes:

Periodontal assessment and charting — measuring and recording pocket depths, bleeding, recession and mobility
Scaling and root surface debridement, including below the gum
Management of gingivitis and periodontitis, within a structured professional relationship with a dentist
Oral hygiene instruction tailored to the individual mouth
Fluoride application and fissure sealants
Radiographs, where qualified
Stain removal and polishing
Preventive advice on diet, smoking and dry mouth

Scope does not include: crowns, bridges or veneers on adult teeth; root canal treatment on permanent teeth; extraction of permanent teeth; implant placement; surgery; or prescribing medicines.

Hygienists work within a structured professional relationship with a dentist. That is a requirement of the registration, not a comment on competence — diagnosis of the overall treatment plan remains with the dentist. The boundary is set out in Dental hygienist vs dentist — what's the difference?, What does a dental hygienist do? and What is the difference between a Dental Therapist and Dental Hygienist?

What any registered practitioner may do is framed by one further standard. The Board's Scope of practice registration standard, in effect since 1 July 2020, "requires dental practitioners to practise within the scope of their education, training, and competence at all times" (Dental Board of Australia, FAQ: Specialist registration). That applies to a dentist exactly as it applies to a hygienist — it is not a hierarchy, it is a boundary each practitioner carries individually.

What the appointment actually is

This is the part most people misunderstand, and it changes what you should expect.

A hygiene appointment is a periodontal assessment and treatment, not a polish. The polish is the last two minutes and the least important part. Your Smile Solutions dental hygienist visit: what to expect walks through a visit.

What should happen:

A review of your medical history and medications. Dry mouth from medication is one of the commonest causes of sudden decay, and it changes the advice completely — see My mouth is always dry — why is this and does it affect my teeth?
A periodontal examination — pocket depths recorded around the teeth, bleeding points noted, recession measured. These are numbers, and you are entitled to be told them. They are how you and the practitioner know whether anything is improving. See What Is Gum Disease? and Periodontal (gum) disease
Removal of plaque and calculus, above and below the gum line, by hand instruments and ultrasonic scaler. Where the deposits sit deeper, see When do you need deeper cleaning?
Specific, individual advice. Not 'floss more' — which sites, which tool, what size interdental brush fits your gaps, and why. See Is flossing really that important? and What is the ideal daily routine for oral hygiene?
A recall interval based on your risk, not a default six months.

Some soreness or sensitivity for a few days after a thorough clean is normal, particularly where there was inflammation. Bleeding during the appointment is a sign of existing inflammation rather than of rough treatment — see Bleeding Gums. Where the periodontal picture is advanced, care is shared with a specialist periodontist.

The things a hygienist will tell you that are worth acting on

Bleeding gums are not normal. They mean inflammation, and inflammation left alone becomes bone loss.
Spit, don't rinse after brushing — rinsing washes away the fluoride that would keep working. See The benefits of fluoride and Choosing the right toothpaste
The night-time brush matters most, because saliva flow falls during sleep. See How often should I brush my teeth?
Interdental brushes beat floss where the spaces admit them, and the right size is specific to you.
Frequency of sugar and acid matters more than quantity. Sipping is worse than drinking — see How does sugar affect your dental health?
Smoking hides gum disease as well as causing it.
Electric brushes help, particularly with reduced dexterity, and neither brand nor price is the deciding factor — technique and consistency are. See Which toothbrushes do dentists recommend?, and on pressure, How much pressure should I apply when brushing my teeth? and Over brushing: What can it do to my teeth?
Any ulcer, white patch, red patch or lump that has not healed in three weeks needs examining. See Oral cancer: Signs, risk factors and how your dentist can help

The two pieces of prevention advice that have independent evidence behind them

Most oral hygiene advice is sensible and uncontroversial. Two parts of it have been examined by national and international bodies, and are worth quoting rather than paraphrasing, because they are the two things that change outcomes most.

Sugar, and specifically free sugars. The World Health Organization states that "the consumption of free sugars in foods and beverages is the most common risk factor for dental caries", and that "limiting the intake of free sugars to less than 10% of total energy intake — and ideally to less than 5% — minimizes the risk of dental caries throughout the life course". Free sugars, as WHO defines them, are "all sugars added to foods and beverages by the manufacturer, cook or consumer, plus sugars naturally present in honey, syrups and fruit juices" (World Health Organization). Fruit juice counts. That surprises people.

WHO also sets out the mechanism in one sentence, and it is the reason frequency matters so much: "a continued high intake of free sugars, inadequate exposure to fluoride and a lack of removal of plaque by toothbrushing with fluoride toothpaste containing 1000-1500 ppm concentration can lead to dental caries".

Fluoride. The National Health and Medical Research Council concluded, after reviewing the evidence, that "water fluoridation reduces tooth decay by 26 to 44% in children and adolescents, and by about 27% in adults", and that "the existing body of evidence consistently shows that water fluoridation safely and effectively reduces tooth decay across the population at the current Australian levels" (NHMRC).

Why a hygienist raises both of these: they are the two levers a patient actually controls between appointments, and together they explain why the advice is about what and how often you drink and whether the fluoride is left on the tooth rather than about brushing harder.

Why prevention is the better economics

Worth stating in plain terms, because it is the argument for the appointment.

Enamel does not grow back, and bone lost to periodontitis does not return. Everything dentistry does after prevention fails is replacement — and every restoration has a finite life and each replacement removes more tooth than the last. A small filling at twenty becomes a larger one at thirty-five, a crown at fifty, possibly a root canal, and eventually an extraction.

Hygiene visits interrupt that sequence at the cheapest possible point. Early enamel demineralisation can remineralise. Gingivitis is fully reversible. Neither is true a few years later. The published fees for hygiene appointments are in the Price Guide, and the longer-term argument is set out under Wellness and Longevity and in How good oral hygiene can increase your lifespan and The importance of dental hygiene — a window onto your overall health.

Registration

The Dental Board of Australia registers dentists, dental specialists, dental hygienists, dental therapists, oral health therapists and dental prosthetists. It does not register dental assistants, dental nurses or dental technicians.

All registered dental practitioners, including hygienists, hold DEN-prefixed registration numbers, renewed annually and subject to standards for recency of practice, continuing professional development, professional indemnity insurance, criminal history and English language skills. Conditions appear on the public register. The clinicians here who hold specialist registration are listed on Dentists and Registered Specialists.

You can check any of this yourself. Ahpra "publishes an online register of all dental practitioners that provides the profession and the public with up-to-date information about a dental practitioner's registration status", and that register "also includes details of the specialty or specialties for dentists who hold specialist registration" (Dental Board of Australia, Specialist Registration). For a hygienist, what you are looking for is the division — it will say Dental Hygienist — together with the registration status and any conditions.

Common questions

Can I book straight in with a hygienist, or do I have to see a dentist first?

Ring and ask, because the answer depends on whether you are already a patient here and on what you need. The underlying reason is not gatekeeping for its own sake: hygienists work within a structured professional relationship with a dentist, and the diagnosis of the overall treatment plan sits with the dentist. That is a condition of how the registration works, not a comment on anyone's skill.

In practice it usually means that a first visit to a practice includes an examination, and that subsequent hygiene appointments can often be booked directly. If you are coming from another practice and have been having regular cleans elsewhere, say so when you ring — the answer may be different from the answer for someone who has not been seen in five years.

What you should not do is skip the examination because you only want the clean. The two appointments look for different things, and decay between teeth, a cracked cusp, a failing old filling or a soft-tissue change are not what a hygiene appointment is set up to diagnose. If something is found during a clean, it gets referred back to the dentist rather than treated on the spot — and that is the system working, not a delay.

If you have a specific concern — bleeding that will not settle, a bad taste, a tooth that has started to feel loose — mention it when booking, so enough time is allowed. Contact Us or call 13 13 96.

How often should I actually come, and who decides?

Your risk decides, not the calendar — and the strongest risk factors are mostly not about brushing. Six months is a default rather than a finding, and for some people it is too often and for others nowhere near often enough.

The evidence behind that is specific and worth knowing, because most people do not realise their medical history has anything to do with their gums.

Diabetes is a major risk factor. The peer-reviewed literature records that susceptibility to periodontitis is increased by approximately threefold in people with diabetes, and that there is a clear relationship between degree of hyperglycaemia and severity. In the US NHANES III survey, adults with an HbA1c above 9% had significantly higher prevalence of severe periodontitis than people without diabetes — OR 2.90 (95% CI 1.40 to 6.03) (Periodontitis and diabetes: a two-way relationship).
It runs both ways. The same literature finds severe periodontitis at baseline associated with an increased risk of poor glycaemic control at follow-up — which is why a diabetes review and a periodontal review belong in the same conversation. See Diabetes and oral health.
Smoking is in a category of its own. One analysis of NHANES III found higher physical activity associated with significantly lower risk of periodontitis — but with no association at all in smokers, the authors suggesting that “the harmful effects of smoking outweighed any benefit of physical activity”. That is as blunt as this literature gets.
Obesity appears in the same analysis: a BMI of 30 or more carried significantly increased risk of periodontitis compared with a BMI of 18.5 to 24.9.

Add to that list dry mouth, whether from medication or another cause, previous bone loss (which never comes back and changes the baseline permanently), pregnancy, and the simple fact of how much calculus has actually accumulated since last time.

So ask for the interval to be explained rather than assumed, and ask what would have to change for it to get longer. A recall interval is a clinical judgement about you — and it should be revisited when your health changes, not just when your teeth do.

Will a clean make my teeth whiter?

It will remove stain, which is not the same as whitening — but for a lot of people it is most of what they actually wanted.

The distinction is real. Stain removal takes off what has accumulated on the enamel: tea, coffee, red wine, tobacco. Whitening changes the shade of the tooth itself by chemical action. A clean returns you to your own colour; it cannot go past it.

That is worth knowing before you spend money, because much of what people read as discolouration is surface staining, and the honest sequence is to have the clean first and then decide whether whitening is still wanted. It is also the correct clinical order in any case: plaque and calculus sit over the enamel, so they block the gel from reaching it and take up the whitening themselves — teeth appear to lighten and then revert once the deposits come off.

If you do want to go further afterwards, the regulatory position is worth understanding: under Schedule 10 of the Poisons Standard, products above 6% hydrogen peroxide or 18% carbamide peroxide may only be sold, supplied and used by registered dental practitioners (TGA Poisons Standard; ADA Policy Statement 2.2.8). See Teeth Whitening.

One honest caveat that applies to both: whitening does not change crowns, veneers, bridges or tooth-coloured fillings, so an existing restoration on a front tooth will stand out more, not less, as the natural teeth lighten around it. Worth raising before you start rather than after.

Since the clean my teeth feel sensitive and there are gaps that were not there before. Did the clean cause that?

Almost always it revealed them rather than caused them — and the distinction matters, because the instinct is to stop having cleans, which is the one response that makes it worse.

Here is what has usually happened. Calculus does not sit neatly on the tooth; it builds into the spaces between teeth and over root surfaces that gum recession has already exposed. While it is there, it fills the gap and insulates the root. Removing it takes away the filler and the insulation at the same moment — so the space that was already there becomes visible, and the root surface that was already exposed starts registering cold. The bone and gum were lost gradually over years; the awareness of it arrives in an afternoon.

What to expect: soreness or sensitivity for a few days after a thorough clean is normal, particularly where there was inflammation, and it generally settles as the gum tissue tightens back against the tooth. A sensitivity toothpaste used consistently — not just when it hurts — is the usual first measure, and there are in-practice options if it persists. See What to do if you suffer from sensitive teeth.

What is worth reporting rather than waiting out: sensitivity that is getting worse after a week or two rather than better; pain on biting; a deep ache that lingers after the cold has gone; or a tooth that has started to feel loose. Those are different problems that happened to be noticed at the same visit.

And the gaps: ask to be shown the periodontal numbers and told which of them changed. Recession and pocket depths are recorded precisely so that this conversation can be had with measurements rather than impressions — including, where more is needed, when do you need deeper cleaning?

Practical details

Belinda's registration and division can be checked free on the AHPRA public register at ahpra.gov.au. To book a hygiene appointment, call 13 13 96, or see Contact Us. The full clinical team is on Our Team.

Smile Solutions, Level 1, 220 Collins Street, Manchester Unity Building, Melbourne VIC 3000. Phone 13 13 96, or theteam@smilesolutions.com.au. Monday–Friday 8.00am–6.00pm, Saturday 8.30am–1.30pm, Sunday by appointment. Location and directions.

This page records qualifications and career history as published by the practice. General information only; it does not replace advice from your treating practitioner. Figures quoted from the World Health Organization, the NHMRC, the Dental Board of Australia and Ahpra are those publishers' and are population-level findings, not predictions about any individual.

Smile Solutions trades under ABN 28 193 514 103.