Clinically reviewed by David Hanna, RDH — Registered Dental Hygienist
Clinical Indications & Contraindications
Indications
Moderate staining where faster lift is desired without going to maximum strength
Patients who tolerated 25% previously and want more pronounced results
Contraindications & Cautions
Active oral pathology; unresolved hypersensitivity
Inadequate isolation capability — barrier is strongly recommended
Mechanism of Action
35% HP increases reactive oxygen availability and diffusion rate, enabling a quicker oxidation of chromogens. Outcomes depend on isolation quality and cycle control.
Step‑by‑Step Protocol (35% HP)
1) Preparation
Baseline shade, photos, consent
Dry field; lip/cheek retractors
2) Isolation
Barrier recommended around gingival margins and exposed cervical areas
3) Application
1–2 mm even layer; avoid soft tissue
Fresh ribbon each cycle
4) Timing
1–2 cycles × 15–20 minutes; mid‑cycle agitation
5) Finish
Suction, rinse; inspect tissues
6) Aftercare
48‑hour white diet; consider desensitizer
Sensitivity Risk & Mitigation
Risk Factors
Exposed dentin; previous post‑op sensitivity
Mitigation
Strict isolation; reduce to 1 cycle if needed
Use desensitizer; reinforce aftercare
Case Scenarios
Moderate staining
1–2 cycles × 15–20 min. If plateaued, consider finishing with 38% HP.
Time‑limited sessions
Single cycle; add recall at 3–6 months with 25% HP maintenance.