Patient receiving a personal consultation at the SmileClub practice

TEETH WHITENING COLOGNE · SMILE CLUB ONE

Brighter teeth.
At home.
With us.

Custom trays. Personal support.
Home whitening that fits your everyday life.

Check suitability. Get a personal plan. Then decide.

Current European Opalescence PF product image from the manufacturer
YOUR HOME WHITENING199 €*Trays + gel + instructions

*€199 for your starter kit, including the first appointment with suitability assessment and NIRI scan. Any necessary cleaning or preliminary treatment is agreed separately.

OPALESCENCE · HOME WHITENING IN 21 SECONDS

THE PRINCIPLE IS SIMPLE

Tray. Gel.
Brighter teeth.

Put gel into your custom trays, insert them and whiten at home. This short film shows the principle. We explain the right application for you in person at our practice.

We determine the gel, dosage and wearing time for your teeth.

Book a whitening appointment

Opalescence application video · Ultradent.

Custom trays Dental supervision NIRI scan included

Your teeth.
Your whitening plan.

We start together at our Cologne practice. Then you whiten your teeth at home. You know which gel to use, how to dose it and when to wear your trays. Our team supports you throughout.

5 REASONS TO WHITEN WITH TRAYS

Effective whitening.
At your own pace.

Custom whitening trays.
A plan for your teeth and your everyday life.

01 / WHITENING

Comparable whitening.
At home, too.

Home whitening can produce similar whitening to treatment at a dental practice. A clinical Opalescence study found no significant differences in colour change at the measured time points.

Whitening study
02 / SENSITIVITY

Less sensitivity
is possible.

In the same study, sensitivity was lower with 10% home whitening than with the highly concentrated in-office protocol. Other studies found similar values. We tailor the gel and application to your teeth.

Studies on sensitivity
03 / REFILL

Keep your trays.
Save on touch-ups.

If your trays still fit and whitening remains suitable, you can reuse them. Two 1.2 ml Opalescence PF syringes cost €29 including VAT. There is no need to make new trays.

Your refill for €29
04 / SUPPORT

Whiten at home.
With dental supervision.

We assess your suitability, check the fit of your custom trays and supervise the first application. We discuss your target shade, gel and treatment plan in person. Our team remains your point of contact while you whiten at home.

05 / YOUR TIMING

Your event.
Your schedule.

Whether it is a wedding, holiday or photo shoot, we allow enough preparation time. You then fit your home applications into everyday life, without a practice appointment for every application. We agree wearing times and any breaks together.

Study on wearing time

Studies relate to specific gels and treatment protocols. Your results and sensitivity may differ.

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OPALESCENCE · BEFORE / AFTER

What whitening
can look like.

A manufacturer's example.
An individual course of treatment.

After photo of the manufacturer's example following 30 days with Opalescence Custom 10%; photos by Carol Jent, RDH
Before photo of the current Ultradent manufacturer's example by Carol Jent, RDH
Drag to compare or use the arrow keys.

Manufacturer's example: Opalescence Custom 10% over 30 days. Photos: Carol Jent, RDH / Ultradent. View manufacturer's reference ↗
Individual results may vary. This is not a SmileClub treatment case or a promise of results for our kit; your gel and application are agreed in person.

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SMILE CLUB ONEHOME WHITENING ↗
Your start.
Your trays.
Opalescence PF packaging variants from the manufacturer's current German website
TRAYS · GEL · INSTRUCTIONS
Manufacturer's image · your kit contents as agreed

EVERYTHING TO GET STARTED

Your whitening.
Your starter kit.

You receive custom trays, suitable gel and personal instructions. The dental suitability assessment and NIRI scan at your first appointment are included in the kit price.

  • 01Dental suitability assessment
  • 02Digital scan with NIRI caries check at the first appointment
  • 03Custom trays for upper and lower teeth
  • 04Whitening gel for the agreed application cycle
  • 05Personal instructions and first application at the practice
199 €*For your
starter kit
Book a whitening appointment

Get advice first. Then decide about treatment.

*Included in the kit price: first appointment with dental suitability assessment and NIRI scan. We agree the full scope of services and costs in writing. Any necessary cleaning or preliminary treatment is discussed separately.

HOW HOME WHITENING WORKS

Start in Cologne.
Continue at home.

Three steps to an application
that suits your teeth.

  1. 01

    Check in Cologne

    At the first appointment, we check your teeth and gums and supplement the examination with a NIRI scan. This check is included in the kit price. We investigate any abnormal findings before whitening.

  2. 02

    Made for you

    Your digital scan is used to make custom trays. We explain the application, check the fit and supervise the first application at the practice.

  3. 03

    Whiten at home

    Apply the gel according to your agreed plan. Contact our team if you have questions or discomfort.

SCIENTIFICALLY STUDIED

Home whitening.
What the studies show.

Clinical research on the method.
Explained transparently.

RANDOMISED STUDY · 202348participants

Similar whitening.
Less sensitivity.

All the methods studied produced whitening. Colour change did not differ significantly between groups at the measurement time points. Sensitivity in the home group was lower than with certain in-office and combined protocols.

Study & context

Zhong et al., China/Switzerland, four groups of 12 people each. Home: Opalescence PF with 10% carbamide peroxide for 14 days; in-office: two sessions with 40% hydrogen peroxide. Small groups, follow-up to day 43. No proof of general equivalence or better enamel protection. The highly concentrated comparison protocols are not application recommendations for our offer.

View original study ↗
RANDOMISED STUDY · 2021130participants

Whitening confirmed.
Individual responses.

This larger study also showed whitening with both methods. The home group reported less sensitivity only on the first day; afterwards, the values did not differ significantly.

Study & context

Donassollo et al., Brazil: 10% carbamide peroxide for at least 2 hours daily for 14 days or two in-office sessions with 35% hydrogen peroxide; both groups received a desensitising gel beforehand. Some colour measurements favoured home whitening. Short-term follow-up up to two weeks after treatment. The broadly similar sensitivity does not support a blanket promise of being “much gentler”.

View original study ↗
JOURNAL OF THE ADA · 2025120participants

Wearing times that fit
your everyday life.

For one studied 10% carbamide peroxide gel, shorter daily wearing times were not inferior to longer application on two colour-change measures after one month.

Study & context

Terra et al., Brazil with a US co-author: 2, 4 or 8 hours daily for 14 days, extended if needed. The result for the Whiteness Index remained unclear. Sensitivity was similar between groups. The study compares home wearing times only. Your wearing time is determined for the gel actually used; shorter times are not a general dosage instruction.

View original study ↗

The studies examine specific products and procedures, not the SmileClub starter kit. Whitening, duration and sensitivity vary between individuals.

Book a whitening appointmentLet's establish which plan suits you.

NIRI · AT YOUR FIRST APPOINTMENT

Check first.
Then whiten.

Your scan shows us more than tooth shape.

First appointment with NIRI check · included in the kit price

Signs of early decay

NIRI uses near-infrared light and can reveal changes between teeth that are difficult to see by looking into the mouth alone. We assess the images together with your clinical findings.

NIRI without X-rays

This additional image uses no X-ray radiation. We take X-rays when medically necessary. NIRI supports diagnosis and does not replace necessary X-rays.

Why we check before whitening

With decay or leaking fillings, whitening gel can penetrate further into the tooth and put the dental pulp at risk. That is why we assess your suitability even for low-concentration home whitening. We investigate abnormal findings and treat them if necessary before starting.

An unremarkable NIRI image does not reliably rule out decay. We also assess white enamel spots according to their cause and activity. Your findings determine the gel and application.

Studies and medical context
iTero manufacturer's example: 3D view of an upper dental arch with camera image and NIRI image of a marked contact area
Assessing the 3D scan, camera image and NIRI together.

CAMERA IMAGE

Unaltered camera image of an upper premolar from the iTero manufacturer's example, case 3

NIRI IMAGE

Unaltered NIRI image of the same premolar: the manufacturer's guide describes a bright approximal area as an indication of a lesion
The same contact area in two views. NIRI can provide additional clues; we make the diagnosis using the complete findings.

Manufacturer's example: Align Technology / iTero Element 5D Clinical Guide, case 3. Images from our Caries-Off archive.

THE HEALTH CHECK BEFORE WHITENING

Why we
take a closer look.

Studies on NIRI diagnosis
and previously damaged enamel.

CLINICAL STUDY · 202422participants

NIRI supplements
caries diagnosis.

A clinical study examined NIRI in permanent posterior teeth. Detection varied by tooth and lesion stage. An unremarkable image alone is therefore insufficient to rule out decay.

Study & context

Kanar et al.: 22 people, 639 tooth surfaces, iTero Element 5D. For clinically validated early enamel lesions in molars, sensitivity was 45.5% for NIRI and 81.8% for bitewing X-rays. The small sample and different lesion stages limit generalisability. The authors declare no financial interests in the companies involved.

View original study ↗
LABORATORY STUDY · 202660extracted teeth

Previously damaged enamel
may be more permeable.

In laboratory tests on artificial white enamel lesions, more peroxide penetrated into the tooth with 16% carbamide peroxide than with healthy enamel. This shows a possible risk, but not inevitable clinical tooth damage.

Studies & context

Baracco et al., 2026: 60 human premolars, artificial white spots, Whiteness Perfect with 16% carbamide peroxide. Peroxide was measured in a buffer solution in the pulp chamber, not damage to a living dental pulp. A laboratory experiment with a gel other than Opalescence; no proof that every concentration damages every lesion.

View original 2026 study ↗

The results are not consistent: Kim et al., 2016, found no additional significant deterioration in mineral composition or cross-sectional microhardness in artificial white spots with 10% Opalescence Non-PF and artificial saliva. This laboratory study also does not authorise use on untreated open decay.

View 2016 comparison study ↗

The check remains important, even with mild gels.

The German Dental Association highlights risks with decayed teeth and leaking restorations. The German guideline on intraoral scanning classifies scan data as an aid to diagnosis. We decide which further examinations are needed based on your findings.

BZÄK: whitening and dental health ↗German guideline on intraoral scanning ↗
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YOUR TRAYS STAY WITH YOU

Your trays stay.
The gel gets replenished.

For a later touch-up, you can reuse trays that fit. You then need refill gel instead of newly made trays.

Before each new application cycle, we check fit and suitability. The first application takes place at our practice; afterwards, you continue at home according to your personal plan.

Discuss a touch-up

OPALESCENCE PF REFILL

29 € 2 original syringes
1.2 ml each
including VAT
€14.50 per syringe

The price covers refill gel. We discuss costs for any necessary examinations or additional services in advance. Gel concentration, dosage and the amount needed depend on your findings and treatment plan.

How much does refill gel cost online?

Examples for Opalescence PF with 2 syringes of 1.2 ml each from our research on 2 October 2026:

Online price examples for two Opalescence PF syringes compared with our refill offer
OfferPrice for 2 syringes
Smile Club One · Cologne€29 including VAT
Mon Sourire Blanc ↗France · PF 10%€35 including VATplus shipping as shown at checkout
BleachingGels.de ↗Poland · PF 16%€28 excluding VATplus VAT and shipping
Hey Whitening ↗Portugal · PF 16%€54.60 including taxesplus €9.90 DPD shipping to Germany

Selected researched offers, not a complete market overview. Prices and availability may change. Concentrations and flavours differ; we choose your gel to suit your teeth. The shipping information for Hey Whitening comes from its shipping terms ↗.

GOOD TO KNOW

Your questions.
Our answers.

Is home whitening suitable for me?

We assess this during a dental examination. Suitable teeth and healthy gums are prerequisites. Decay, leaking fillings or other findings may require preliminary treatment. This offer is for adults aged 18 and over.

How white will my teeth become?

That depends on your starting shade, the type of discolouration and the application. We discuss a realistic target with you. We cannot guarantee a particular shade or a fixed duration of the results.

How do I plan whitening before an event?

Tell us the occasion and date early. The examination, tray manufacture and whitening need preparation time. After your instructions, you fit home applications into everyday life; daily wearing time and total duration depend on your gel and findings. We also plan for possible breaks due to sensitivity. A specific result by a fixed date is not guaranteed.

Is the NIRI scan included in the first appointment?

Yes. The dental suitability assessment and digital NIRI scan are part of your first appointment and included in the kit price. NIRI uses near-infrared light and can provide signs of early decay between teeth. We discuss the images and your findings with you in person.

Does NIRI mean I no longer need X-rays?

The NIRI image itself uses no X-ray radiation. However, it cannot reliably detect every instance of decay or assess the entire clinical situation. We decide whether additional X-rays are medically necessary based on the examination. NIRI does not replace necessary X-rays.

Why is the check important even with mild whitening gel?

A low active-ingredient concentration does not replace an examination. Decay and leaking fillings can make it easier for whitening agents to penetrate the tooth and put the dental pulp at risk. We therefore investigate abnormal findings before whitening and treat them if needed. Whether white enamel spots are suitable for whitening depends, among other things, on their cause and activity.

What if I have sensitive teeth?

Tell us about any existing discomfort before you start. Whitening can temporarily make teeth more sensitive. We agree the application with you. If you experience pain, stop applying the gel and contact our practice.

Will fillings and crowns become whiter?

Fillings, crowns, veneers and other dental restorations are not lightened by whitening. We discuss beforehand whether this could create visible shade differences.

Will my health insurance pay for whitening?

Cosmetic whitening is an elective service paid for privately. A regular check-up under Germany's statutory health insurance is separate and may be billed to your insurer if the requirements are met. We explain in advance which services can be billed to your insurer and which you pay for privately. The NIRI scan at the first appointment is included in our private kit price; this does not promise automatic reimbursement by your insurer.

How does a later touch-up work?

We check whether your trays still fit and whether another application is suitable. You receive refill gel for the agreed application cycle. The first application of each new cycle is also carried out by a dentist or under direct dental supervision. We agree the gel, quantity and further application in person.

How much does refill gel cost?

Two original 1.2 ml Opalescence PF syringes cost €29 including VAT. That is €14.50 per syringe. The price covers the gel; we discuss the costs of any necessary examinations or additional services beforehand. Well-fitting trays and suitable teeth remain prerequisites for a touch-up.

How many applications are possible with two syringes?

That depends on your trays, the amount of gel needed and your personal treatment plan. Two syringes therefore do not imply a fixed number of applications. We show you the correct dosage and provide the amount you need until your next check-up.

Do I need a dental cleaning beforehand?

Before whitening, deposits and external stains must be assessed and removed if necessary. We discuss with you in advance whether cleaning or further treatment is needed, including any additional costs.

Waiting area at the SmileClub practice in Cologne

YOUR SMILE CLUB IN COLOGNE

Personal.
In the heart of Cologne.

Your whitening begins with an appointment in person at our practice.

Smile Club One
Große Brinkgasse 29
50672 Cologne
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YOUR FIRST STEP

Your whitening.
Your appointment.

Choose your appointment for our whitening starter kit. At our Cologne practice, we assess your suitability and discuss the appropriate procedure and costs. Then you decide about treatment.

Cologne · Große Brinkgasse 29

WHITENING KIT · SMILE CLUB ONE

Choose your appointment.

The online calendar shows available times and lets you book your appointment directly.

30 minutesCologne practice
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