Fissure Sealants

The chewing surfaces of molars contain deep grooves and pits — fissures — that toothbrush bristles cannot fully reach, which is why so many cavities start there. A fissure sealant is a thin, tooth-coloured protective coating that flows into these grooves and sets as a smooth barrier, keeping food debris and plaque bacteria out of the areas brushing alone cannot protect. It is one of the simplest, most conservative preventive treatments in dentistry, and we place sealants regularly at our Wimpole Street practice.

Sealants are best known as a treatment for children, and with good reason: adult molars typically erupt around ages six and twelve, and sealing them soon after they appear protects the fissures during the years when decay risk is often highest. UK guidance supports fissure sealing for children at increased risk of decay, and sealants sit naturally alongside good brushing, sensible snacking habits and fluoride toothpaste as part of a prevention-first approach to children’s dentistry.

Adults benefit too. If you have naturally deep grooves, a history of fillings in your back teeth, a dry mouth from medication, or you wear aligners or retainers for long periods, sealing sound molars can help reduce the chance of new decay starting on the chewing surfaces. Your dentist will confirm which teeth are suitable at an in-person consultation — sealants are for healthy or minimally affected fissures, not for teeth that already have established cavities.

The appointment itself is quick and entirely drill-free. Each tooth takes around 10–15 minutes: the surface is cleaned and dried, a mild conditioning gel is applied for a few seconds to help the sealant bond, the tooth is rinsed and dried again, and the liquid sealant is flowed into the fissures and set hard with a blue curing light. There are no injections and no drilling, which makes sealants an ideal early experience of dentistry for children — many barely notice it has happened.

We use modern resin-based sealant materials, placed under careful moisture control, because a well-bonded sealant is what delivers long-term protection. Where a fissure shows the very earliest signs of decay confined to the enamel, your dentist may recommend a sealant or a slightly reinforced version as a way of arresting the process without a filling — a genuinely minimal-intervention option that preserves the whole tooth.

Fissure sealants cost £65 per tooth at our practice. The overall cost simply reflects how many teeth are suitable for sealing — often the four first adult molars in a child, sometimes more, sometimes fewer. After your examination, your written, itemised quote is confirmed before treatment begins, and there is never any pressure to seal more teeth than your dentist believes will genuinely benefit.

How do sealants compare with the alternatives? Fluoride varnish, applied at routine visits, strengthens enamel across all tooth surfaces and works well alongside sealants rather than instead of them. Doing nothing and simply monitoring is reasonable for low-risk patients with shallow fissures. The comparison worth remembering is with treatment after the event: a sealant placed in minutes, with no drilling, versus a filling once decay has taken hold. Prevention is typically simpler, quicker and less costly.

Sealants need no special aftercare. You or your child can eat and drink normally straight away, and brushing continues exactly as before — sealants protect the chewing surfaces, but the sides of the teeth and the gumline still rely on good daily cleaning and regular hygiene care. Very sticky or hard sweets are best kept occasional in any case, both for the sealants and for the teeth themselves.

A sealant typically lasts several years, and every sealant is checked at each routine examination. If one has chipped or worn, it can usually be topped up in minutes at minimal fuss. Longevity varies between individuals and depends on bite forces and habits, which is another reason regular check-ups matter — a partially lost sealant that goes unnoticed protects less well than an intact one.

If you are looking into fissure sealants in London for yourself or your child, our practice in Marylebone, near Harley Street, takes a prevention-led approach to family dentistry: gentle, unhurried appointments, honest advice about which teeth genuinely need sealing, and clear written pricing. We are easy to reach from across central London, and sealants can often be placed at the same visit as a routine check-up, subject to time and suitability.

What happens at the consultation? Before recommending any sealants, your dentist examines each back tooth individually, sometimes with intraoral photographs or a small X-ray where clinically justified, to confirm the fissures are sound and suitable. We consider the whole picture — your or your child's decay history, diet, brushing habits and fluoride exposure — because sealants are a targeted tool, not a blanket treatment. You then receive a written, itemised quote listing exactly which teeth we suggest sealing and why, and there is never any obligation to proceed on the day.

For children, the way the appointment is handled matters as much as the treatment itself. Our clinicians take time to show and explain each step in child-friendly language — the ‘tooth shampoo’ conditioning gel, the ‘magic torch’ curing light — so the visit feels like a game rather than a procedure. Because nothing hurts and nothing is drilled, sealants often become a child's first positive memory of the dentist, which pays dividends for a lifetime of comfortable dental care. Parents are welcome to stay chairside throughout.

Families travelling to our Wimpole Street practice will find us a short walk from Bond Street and Oxford Circus stations, with Regent's Park station also nearby — convenient for combining an appointment with a trip to the park or the shops. Sealants for siblings can often be booked back-to-back to save a second journey, and where sealants are placed at the same visit as a check-up, the whole family can frequently be seen within a single hour, subject to availability.