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Dental Propaedeutics · Chapter 12. Dental Anesthesia

Topical anesthesia

Anaesthesia superficialis

Topical (surface) anesthesia is a method of non-injection local anesthesia of the oral mucosa. It is achieved by applying an anesthetic (in the form of a solution, ointment, gel, or aerosol) directly to the tissues in the area of the upcoming intervention.

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ObjectiveAnesthetization of superficial tissues prior to injections or manipulations.
Exposure timeFrom 1 to 5 minutes depending on the drug formulation.
Working formSolutions, ointments, gels, aerosols.
Important conditionIsolation of the area to prevent the anesthetic from spreading.
2 min readFor medical studentsUpdated Sep 25, 2026
Material prepared by WhiteCoat Pro editorial team based on platform study guidesReviewed by medical editor: Aulov A. A., general practitioner · 09/24/2026

Indications

Topical anesthesia is used when it is necessary to eliminate sensitivity only in the superficial layers of the mucous membrane. Main indications for use:

  • Pain relief before needle insertion for subsequent injection anesthesia.
  • Operations on the maxillary sinus and its puncture.
  • Extraction of mobile and primary (deciduous) teeth.
  • Diagnostic punctures of tumor-like formations.
  • Tissue scraping for cytological examination.
  • Opening of superficially located abscesses.
  • Incision of the gingiva (gingivotomy).
  • Dressing changes.

Main drugs (solutions)

For surface treatment of the mucous membrane, local anesthetic solutions in various concentrations are used:

  • Lidocaine: 2–10% solution. The most popular drug, also used as an aerosol.
  • Trimecaine: 4–10% solution. (Note: the section on trimecaine mentions its unsuitability for topical anesthesia, yet in the section on the technique itself it is listed among the drugs used).
  • Pyromecaine: 1–2% solution.
  • Sovcain: 0.05–0.2% solution.
  • Tetracaine (Amethocaine): 0.5–2% solution. Used extremely rarely due to high toxicity and risk of complications. The effect occurs in 1–3 minutes and lasts 20–40 minutes.
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Ointments and gels

In addition to solutions, formulations that adhere better to the mucous membrane are actively used:

  • Pyromecaine ointment.
  • Peralen ultra.
  • Pulponest.
  • Xylonor.

Such formulations are applied locally on a cotton or gauze swab (or turunda). The average application time is 3–5 minutes. For certain conservative treatment tasks, ointments may be applied for 5–10 minutes.

Application technique

To achieve optimal effect and minimize risks, it is necessary to follow the application technique (for solutions, except tetracaine):

  1. The drug is applied to the intervention site using a sterile cotton-tipped applicator.
  2. The holding time is 1–2 minutes.
  3. Critically important to carefully retract the surrounding soft tissues (cheeks, lips). This will prevent the drug from spreading beyond the working area and having an undesirable effect on other areas of the oral cavity.

Briefly: answers to topical questions

What is the maximum permissible dose of 10% lidocaine aerosol when treating the oral mucosa in adults?

The maximum permissible dose of a 10% lidocaine solution for topical anesthesia of the oral mucosa is no more than 2 ml, which corresponds to 200 mg.

Class and exam questions

Why must the operational field be isolated prior to anesthetic application?

To prevent the drug from spreading to adjacent areas (lips, cheeks, tongue), which can cause undesirable numbness and discomfort for the patient, as well as reduce the drug concentration in the target zone.

Is Novocaine (Procaine) used for topical anesthesia?

No, Procaine is used for infiltration and nerve block anesthesia because it penetrates poorly through intact mucosa.

How long should the drug be kept on the mucosa?

Depending on the form: solutions are applied for 1–2 minutes (tetracaine for 3–5 minutes), ointments and gels are usually left for 3–5 minutes.

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What else to study on this topic

  • Classification of local anesthetics by chemical structure (esters and amides)
  • Infiltration and nerve block anesthesia: drugs and doses
  • Use of Articaine and its combinations with epinephrine
  • Complications in the use of local anesthetics and symptoms of intoxication
  • Cryoanalgesia (ethyl chloride)

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Other topics in "Chapter 12. Dental Anesthesia"

Types of anesthesia in dentistryLocal anestheticsInstruments for local anesthesiaInfiltration anesthesiaMaxillary nerve block anesthesiaMandibular nerve block anesthesiaIntraligamentary anesthesiaGeneral complications of local anesthesiaLocal complications of local anesthesia
Entire section "Chapter 12. Dental Anesthesia"

Prepared by WhiteCoat Pro faculty in accordance with the medical school curriculum. For educational purposes only.