Aesthetic dentistry · Clinical protocol

Tooth whitening,
rethought.

A standardized clinical protocol, designed to combine medical safety, aesthetic predictability and reproducible results.
By Hugo Philippe Fusaro Clinical article · Tooth whitening · 2026
After Before
before
after
02
Regulation

A procedure governed by European regulation.

Three stakeholders, distinct roles.

In accordance with European Directive 2011/84/EU1, products releasing 0.1% to 6% hydrogen peroxide are not available over the counter. The first application must be performed (or directly supervised) by a dentist.

This requirement draws a clear line between the supervised clinical procedure and non-medical "smile bars", where the absence of diagnosis and supervision exposes the patient to avoidable complications.

Dentist Medical lead · Indication, prescription, supervision of the first application, clinical follow-up
Dental laboratory Technical production · Custom-fitted trays, traceability, protocol support
Supervised patient At-home phase · Tray wear at home according to protocol, scheduled check-ups
Practice and laboratory: the digital workflow connects the chair to the tray
03
Mechanism

The science, in brief.

HHOOH₂O₂ oxidation cleaved chromophore •OH free radicals
04
Product

The Pola SDI range.

Day · Fast
Pola Day
6 % HP
FormHydrogen peroxide
Wear time30 to 45 min / day
KineticsFast release
pHNeutral
Active patient, low sensitivity, short daytime protocol.
Night · Gentle
Pola Night
10 % CP
FormCarbamide peroxide
HP equivalent≈ 3.3%
Wear timeOvernight / extended wear
pHNeutral
Sensitive patient, progressive and comfortable protocol.
Night · Performance
Pola Night
16 % CP
FormCarbamide peroxide
HP equivalent≈ 5.3%
Wear time2 to 4 h or overnight
pHNeutral
Low sensitivity, fast result expected.
Dosage & consumption
Pack of 50 syringes · 1.3 g each, built-in desensitizers
6
Syringes
per patient
1.3
g per
syringe
14
days,
average protocol
2
touch-ups
per year (maintenance)
Neutral pH
Enamel preservation
High viscosity
No gingival overflow
Built-in desensitizers
KNO₃ + sodium fluoride
Complete range
3 concentrations
05
Protocol

Five steps, no shortcuts.6

A strict protocol is the condition for legal safety, patient satisfaction and reproducible results. Each step has a precise role: none is optional.

I
Dentist
Diagnosis
Medical history, contraindications, baseline shade photo.
II
Dentist
Scaling
+ Polishing
Removal of calculus and stains. A clean, uniform surface.
III
Dentist
Digital
impression
Intraoral scanner. STL file sent to the laboratory.
IV
Supervised patient
At-home
treatment
First application supervised. 14 days on average.
V
Dentist +
Result
+ Follow-up
After photos, check-up, desensitization, maintenance.
Diagnosis
I
Diagnosis
Scaling
II
Scaling
Scanner
III
Digital scanning
Whitening tray
IV
Tray in place
Result
V
Final result
06
Selection

The right patient, at the right time.

Patient selection accounts for 80% of clinical success and 100% of legal safety.

  • Untreated active caries
  • Exposed cervical lesions
  • Severe dental hypersensitivity
  • Unstabilized gingivitis or periodontitis
  • Visible anterior restorations
  • Deep intrinsic discoloration
  • Pregnant or breastfeeding patients
  • Minors (legally prohibited)
  • Active bruxism without a night guard
  • Peroxide allergy
  • Unrealistic expectations of the result
  • Internal resorption
07
Management

Sensitivity, four levers.

Potassium nitrate 5%7
Neural action
14-day pre-treatment or built into the Pola gel. Blocks Aδ nerve transmission. The evidence-based reference.
Sodium fluoride
Remineralization
Topical application after each session, 30 min in the tray. CaF₂ formation, partial occlusion of open tubules.
CPP-ACP8
Amorphous remineralization
Casein phosphopeptide + amorphous calcium phosphate. Deep ionic diffusion, prolonged action.
Protocol modulation9
Clinical adjustment
Shorter wear time, longer intervals between applications, switching to a lower concentration.
08
Complications

Four complications, four countermeasures.

Tooth sensitivity10
I

The leading cause of discomfort. Mostly transient, but it must be anticipated to prevent patients from abandoning the protocol.

KNO₃ 5% pre-treatment + adjusted wear time + post-session desensitizers.
Result below expectations
II

Intrinsic discoloration underestimated, or expectations not reframed during the initial consultation.

Strict selection + baseline shade photography + a realistic conversation about expectations.
Gingival irritation
III

Prolonged gel contact with the gingiva, encouraged by an ill-fitting tray or an excessive amount of gel.

Custom tray with controlled reservoirs + calibrated gel quantity + careful rinsing.
Shade relapse
IV

Partial chromatic rebound in the months following treatment, linked to diet and tobacco.

Scheduled maintenance touch-ups + dietary advice + photographic follow-up.
· Summary ·

A simple, safe and reproducible protocol.

I.
Diagnosis
Rigorous selection, contraindications ruled out, baseline shade documented.
II.
Preparation
Scaling, polishing, digital impression, custom-fitted trays.
III.
Treatment
First application supervised, structured at-home protocol (~14 days).
IV.
Follow-up
Result check-up, desensitization, maintenance and scheduled touch-ups.
10
Sources

Scientific references

All clinical and regulatory statements in this presentation are supported by peer-reviewed sources (PubMed) and the European legal framework. Each number N in the document points here.

  1. Conseil de l'Union européenne. Directive 2011/84/UE du 20 septembre 2011 modifiant la directive 76/768/CEE relative aux produits cosmétiques en vue d'adapter son annexe III au progrès technique. Journal officiel de l'Union européenne, L 283/36, 29.10.2011. EUR-Lex
  2. Kwon SR, Wertz PW. Review of the Mechanism of Tooth Whitening. J Esthet Restor Dent. 2015;27(5):240-257. PMID 25969131
  3. Attin T, Schmidlin PR, Wegehaupt F, Wiegand A. Influence of study design on the impact of bleaching agents on dental enamel microhardness: a review. Dent Mater. 2009;25(2):143-157. PMID 18635255
  4. Wang Y, Gao J, Jiang T, Liang S, Zhou Y, Matis BA. Evaluation of the efficacy of potassium nitrate and sodium fluoride as desensitizing agents during tooth bleaching treatment: A systematic review and meta-analysis. J Dent. 2015;43(8):913-923. PMID 25913140
  5. Carey CM. Tooth whitening: what we now know. J Evid Based Dent Pract. 2014;14 Suppl:70-76. PMID 24929591
  6. de Geus JL, Martins ACR, Reis A, Rezende M. At-home vs In-office Bleaching: An Updated Systematic Review and Meta-analysis. Oper Dent. 2025. PMID 40485133
  7. Haywood VB. Treating sensitivity during tooth whitening. Compend Contin Educ Dent. 2005;26(9 Suppl 3):11-20. PMID 17039676
  8. Reynolds EC. Casein Phosphopeptide-Amorphous Calcium Phosphate: The Scientific Evidence. Adv Dent Res. 2009;21(1):25-29. DOI 10.1177/0895937409335619
  9. Donato MV, Reis-Prado AHD, Abreu LG, et al. Influence of dental bleaching on the pulp tissue: A systematic review of in vivo studies. Int Endod J. 2024;57(6):630-654. PMID 38470103
  10. In-office tooth bleaching protocols: an umbrella review of systematic reviews and meta-analyses on whitening efficacy and tooth sensitivity. Saudi Dent J. 2026. PMC13031690

Presentation document for educational and strategic purposes. The references cited are not a substitute for reading the original sources in full, nor for the clinical judgment of the partner dentist.

Hugo Philippe FUSARO

Digital dental design · CAD-CAM workflow · Exocad Trainer

Emailhfusaropro@gmail.com Phone+33 6 15 39 70 53 LinkedInView profile →
Hugo Philippe Fusaro