Antibiotics in Dental Surgery

A comprehensive professional reference for prescription principles and protocols adapted to the Algerian context.

👤 DentoLink 📅 November 27, 2025 ⏱ 20 min read

General Principles of Dental Antibiotic Therapy

When to prescribe an antibiotic?

Prescription is justified only when the infection exceeds local defense capacities or when systemic spread is proven or predictable. Curative antibiotic therapy is reserved for infections with systemic signs (fever > 38.5°C, trismus, lymphadenopathy, cellulitis), immunocompromised patients, or those at risk of infective endocarditis.

Golden Rule: The antibiotic never replaces local treatment. Any abscess must be drained, and any causal tooth must be treated. Antibiotic therapy alone without a dental procedure is insufficient and encourages relapse and resistance.

Validated Indications in Odontology

Clinical Situation	Antibiotic Therapy	Evidence Level
Diffuse infectious cellulitis	Yes — systematic	Grade A
Abscess with systemic signs	Yes — curative	Grade A
Aggressive periodontitis	Yes — adjuvant to SRP	Grade B
Irreversible pulpitis without spread	Not indicated	Grade A
Simple extraction in healthy patient	Not indicated	Grade A

Molecules Available in Algeria

Amoxicillin

Broad-spectrum Penicillin

Tabs 500 mg, 1 g · Syrup available
Adult: 2–3 g/day in 3 doses, 5–7 days
First-line for streptococcal infections
Brands: Saidal®, Clamoxyl®, Amoxil®

Amoxicillin + Clavulanic Acid

Co-amoxiclav — β-lactamase inhibitor

Tabs 1g (875/125 mg)
Adult: 1g × 2–3/day, 5–7 days
For severe or mixed aero-anaerobic infections
Brands: Augmentin®, Amoclav®, Claventin®

Spiramycin + Metronidazole

Synergistic association (Rodogyl® type)

Specific dental combination tabs
Synergistic effect on oral flora
Very common in Algerian clinical practice

Clindamycin

Lincosamide — Bone penetration

Best alternative for Penicillin allergy
600 mg × 3/day, 5–7 days
Brand: Dalacin®

Prescription Protocols by Pathology

Infectious Cellulitis

Option 1 — First-line

Amoxicillin 1g × 3/d + Metronidazole 500mg × 3/d — 7 days

Aggressive Periodontitis

Reference Protocol

Amoxicillin 500mg × 3/d + Metronidazole 500mg × 3/d — 7 days

Infective Endocarditis Prophylaxis

No β-lactam allergy

1st Line

Amoxicillin 2 g

Single dose, 30–60 min before procedure

Documented Penicillin allergy

2nd Line

Clindamycin 600 mg

Single dose, 30–60 min before procedure

Bacterial Resistance in Algeria

Concerning Context: Algeria has high antibiotic consumption. Self-medication and premature treatment cessation fuel a cycle of increasing resistance observable in dental practice.

FAQ — Frequent Clinical Questions

No. In a healthy patient without risk factors or signs of infection, post-extraction antibiotic therapy is not recommended. Grade A evidence shows it provides no benefit in this context and promotes resistance.

It remains a valid option for mixed infections. However, the resistance rate of oral streptococci to macrolides exceeds 30% in Algeria. The combination of Amoxicillin + Metronidazole is pharmacologically stronger and preferred when possible.