Modern dental cleaning: ultrasonic scaling, air polishing and biofilm control

What modern scaling actually does

Modern scaling removes tartar, but above all it removes biofilm, the organised layer of bacteria that re-forms every day on the teeth and below the gumline. It usually combines ultrasonic instruments to remove hard deposits with, in some cases, fine-powder air polishing to clean away biofilm and stains. The goal is not "scraped" teeth but healthy, non-inflamed gums.

Two things need to be told apart:

• biofilm (plaque): soft, invisible or whitish, it forms within hours and is removed by brushing and interdental cleaning. It is what causes gum inflammation and decay;
• tartar (calculus): plaque that has been mineralised by salts in saliva. Hard and rough, it no longer comes off with a brush and acts as a base for new biofilm.

Tartar is therefore a problem mainly because it holds plaque. That is why current protocols focus on removing biofilm completely, including where no visible tartar has formed yet.

Ultrasonic scaling: removing tartar gently

The most widely used instrument for scaling is the ultrasonic tip. It vibrates at a very high frequency and breaks up tartar, while a water spray cools the instrument and flushes away debris. The high-pitched sound and vibrating sensation are normal.

Ultrasonic instruments have several advantages:

• they dislodge tartar with little pressure on the tooth;
• the water spray helps flush out gum pockets;
• slim tips allow work below the gumline when needed.

Hand instruments called curettes often complete the work in precise areas or to check the root surface. Contrary to a common belief, properly performed scaling does not wear away enamel or damage the teeth.

There are two main types of ultrasonic technology. If you have a pacemaker or an implanted defibrillator, always mention it: your dentist will choose the right instrument for your situation.

Air polishing: glycine, erythritol and bicarbonate

Air polishing sprays a mixture of air, water and a very fine powder onto the teeth. It cleans away biofilm and stains in hard-to-reach areas: between teeth, around orthodontic appliances, implants and bonded retainers.

The choice of powder is crucial:

• sodium bicarbonate: the original powder, effective on tea, coffee and tobacco stains but more abrasive. It is used on enamel only, above the gumline;
• glycine: a fine-grained amino acid, much less abrasive, suitable for exposed roots and gum tissue;
• erythritol: a sugar alcohol with even finer grains, very low abrasiveness, often combined with an antiseptic. It suits cleaning around implants and, with a dedicated nozzle, shallow pockets.

Gentle powders have changed how air polishing is used: it is no longer just a cosmetic "polish" but a genuine biofilm-cleaning tool. Air polishing is not available everywhere, and your dentist will tell you whether it is indicated in your case.

Biofilm-guided protocols

In recent years, structured protocols have been proposed that organise the visit around biofilm rather than tartar. In simple terms, their principles are:

• disclose plaque with a dye to make it visible, showing the patient the areas missed when brushing;
• explain and motivate: tailor hygiene advice to what the dye reveals;
• remove biofilm with gentle-powder air polishing on teeth, gums and around implants;
• remove remaining tartar with ultrasonics, in a targeted way, only where it persists;
• check that everything has been cleaned, then set the next visit according to risk.

This approach has two benefits: more thorough cleaning, and an often more comfortable visit, as mechanical instruments are used only where necessary. A final polish with paste often becomes unnecessary.

These protocols are a way of organising care, not a requirement: a well-performed conventional scale and polish remains effective.

Contraindications and precautions

Scaling is a routine and safe procedure, but some situations should be mentioned before the visit:

• anticoagulant or antiplatelet medication: it does not rule out scaling, but your dentist needs to know;
• a pacemaker or defibrillator, for the choice of ultrasonic device;
• significant respiratory disease, as the aerosol produced by air polishing may cause discomfort;
• a low-sodium diet, which means avoiding sodium bicarbonate powder;
• certain heart conditions with a risk of endocarditis, for which antibiotic cover may be needed according to guidelines;
• contact lenses, which are best removed before air polishing;
• pregnancy: scaling is possible and even recommended, as gums are often more inflamed at this time.

After the visit, temporary sensitivity to cold or slightly irritated gums are common and usually settle within a few days.

Common myths and how often to come

Several beliefs about scaling are widespread:

• "Scaling loosens teeth." False. Tartar sometimes hides gums that have already receded; once it is removed, the gap becomes visible, but it was there before. The gums then shrink back as they heal.
• "It whitens teeth." Only partly: it removes surface stains and tartar, which brightens the smile, but it does not change the tooth's natural colour. Our article on yellow teeth explains the difference.
• "If my gums bleed, I should wait." Quite the opposite: bleeding is a sign of inflammation that cleaning helps treat, as explained in our article on bleeding gums.

Frequency is individual. For many adults, a check-up with cleaning once or twice a year is suitable. People who build up a lot of tartar, smokers, people with implants or bonded retainers, and above all patients treated for gum disease often need more frequent visits.

Scaling, gum health and follow-up in Agdal

Careful scaling is often the first step towards healthy gums. If it reveals deep pockets, widespread bleeding or bone loss on the X-ray, it is no longer enough: a periodontal assessment and appropriate gum treatment take over.

At German Dental Clinic in Agdal, scaling comes with a gum examination and personalised hygiene advice, with digital X-rays when useful. The dentist explains the techniques used and the follow-up interval suited to your mouth. If you live in Rabat and your last cleaning was a while ago, you can book an appointment.