GUIDELINES ON USE OF ANTIBIOTICS IN DENTAL PRACTICE3... · Endodontic therapy using rubber dam....
Transcript of GUIDELINES ON USE OF ANTIBIOTICS IN DENTAL PRACTICE3... · Endodontic therapy using rubber dam....
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GUIDELINES ON
USE OF
ANTIBIOTICS IN
DENTAL PRACTICE
Mohammad Hussein Zaki Lecturer Oral & Maxillofacial Surgery
Faculty of Dentistry - Minia University
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INTRODUCTION
Antibiotics are usually used in dental
practice for different purposes:
Treatment of present odontogenic infection.
Prophylaxis against wound infection.
Prophylaxis against metastatic infection.
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ANTIBIOTIC THERAPY FOR ODONTOGENIC INFECTION
Misconceptions:
Patients with obvious odontogenic infection
should not be touched until it resolved via
antibiotic therapy.
All infections, by definition, require antibiotic
administration.
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ANTIBIOTIC THERAPY FOR ODONTOGENIC INFECTION
Three factors must be considered:
The seriousness of the infection.
Whether adequate surgical treatment can be
achieved.
The state of the patient’s host defenses.
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ANTIBIOTIC THERAPY FOR ODONTOGENIC INFECTION
Indications of antibiotic prescription:
Presence of an acute-onset infection with
diffuse swelling and moderate-to-severe pain.
Any type of infection in patient who is
immunologically compromised.
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ANTIBIOTIC THERAPY FOR ODONTOGENIC INFECTION
Indications of antibiotic prescription:
The presence of an infection that has
progressed to involvement of the deep fascial
spaces.
Trismus.
Severe pericoronitis.
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ANTIBIOTIC THERAPY FOR ODONTOGENIC INFECTION
Indications of antibiotic prescription:
Temperature higher than 38.3°C.
Lymphadenopathy.
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ANTIBIOTIC THERAPY FOR ODONTOGENIC INFECTION
Antibiotic therapy is not indicated in:
Minor, chronic, well-localized abscess.
Localized alveolar osteitis (dry socket).
Mild pericoronitis with minor gingival edema
and mild pain.
Multiple dental extractions in an immuno-
competent patient.
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ANTIBIOTIC THERAPY FOR ODONTOGENIC INFECTION
Antibiotic therapy protocol:
Use empirical therapy routinely.
Use the antibiotic with the lowest incidence
of toxicity and side effects.
Use a bactericidal antibiotic, if possible.
Be aware of the cost of antibiotics.
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ANTIBIOTIC THERAPY FOR ODONTOGENIC INFECTION
Proper antibiotic prescription:
Proper dose.
The peak plasma level of the drug should
usually be at least four or five times the
minimal inhibitory concentration for the
bacteria involved in the infection.
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ANTIBIOTIC THERAPY FOR ODONTOGENIC INFECTION
Proper antibiotic prescription:
Proper dose.
Consideration should be given to
administering an initial loading dose of an
antimicrobial as the first dose.
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ANTIBIOTIC THERAPY FOR ODONTOGENIC INFECTION
Proper antibiotic prescription:
Proper interval.
This is determined by the plasma half-life of
the drug.
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ANTIBIOTIC THERAPY FOR ODONTOGENIC INFECTION
Proper antibiotic prescription:
High compliance.
The degree to which a patient correctly
follows medical advice regarding the drug.
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ANTIBIOTIC THERAPY FOR ODONTOGENIC INFECTION
Proper antibiotic prescription:
Adequate period.
2 to 3 days after the infection has resolved.
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ANTIBIOTIC THERAPY FOR ODONTOGENIC INFECTION
Failure of antibiotic therapy:
Patient noncompliance.
Inadequate surgery.
Drug dose too low.
Wrong identification of bacteria.
Wrong antibiotic.
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ANTIBIOTIC THERAPY FOR ODONTOGENIC INFECTION
Commonly used antibiotics:
Microbiology of odontogenic infection:
Aerobic gram-positive cocci.
Streptococcus milleri group.
Anaerobic gram-positive cocci.
Anaerobic Streptococcus & Peptostreptococcus.
Anaerobic gram-negative rods.
Prevotella and Porphyromonas spp. & fusibacterium.
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ANTIBIOTIC THERAPY FOR ODONTOGENIC INFECTION
Commonly used antibiotics:
Effective antibiotics:
Penicillins.
Penicillin, ampicillin and amoxicillin.
Bactericidal.
Effective against aerobic and anaerobic pathogens.
Prevotella Porphyromonas and Fusobacterium may exhibit
resistance.
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ANTIBIOTIC THERAPY FOR ODONTOGENIC INFECTION
Commonly used antibiotics:
Effective antibiotics:
Cephalosporins.
Bactericidal.
Effective against aerobic and less effective to anaerobic
pathogens.
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ANTIBIOTIC THERAPY FOR ODONTOGENIC INFECTION
Commonly used antibiotics:
Effective antibiotics:
Lincosamides.
Clindamycin.
Bacteriostatic.
Increased activity against anaerobic bacteria.
Increased diffusion in bony tissues.
Pseudomembranous colitis in 20 % of patients.
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ANTIBIOTIC THERAPY FOR ODONTOGENIC INFECTION
Commonly used antibiotics:
Effective antibiotics:
Macrolides.
Clarithromycin & azithromycin.
Bacteriostatic.
Decreased activity against Prevotella, Porphyromonas and
Fusobacterium.
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ANTIBIOTIC THERAPY FOR ODONTOGENIC INFECTION
Commonly used antibiotics:
Effective antibiotics:
Nitroimidazoles.
Metronidazole, Ornidazole & Tinidazole
Excellent activity against anaerobic gram negative bacilli.
Decreased or no effect on against anaerobic cocci and
facultative aerobic bacteria.
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PREVENTION OF WOUND INFECTION
Advantages of prophylaxis :
Reduction the incidence of postoperative
infection reduces the postoperative
morbidity.
Reduction of the cost of health care.
Requires a shorter-term administration,
rather than therapeutic use.
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PREVENTION OF WOUND INFECTION
Disadvantages of prophylaxis:
May alter host flora.
Allows antibiotic-resistant organisms to
spread to the patient’s family.
In situations where the risk of infection is so
low that the antibiotic does not significantly
decrease the incidence of infection.
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PREVENTION OF WOUND INFECTION
Disadvantages of prophylaxis:
May encourage lax surgical and aseptic
techniques on the part of the dentist.
The cost for many surgeries for many
patients can be enormous.
The possibility of toxicity is always present.
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PREVENTION OF WOUND INFECTION
Misconception:
Any minor oral surgery need a
preoperative dose of prophylactic
antibiotic.
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PREVENTION OF WOUND INFECTION
Principles of prophylaxis:
Procedure should have significant risk of
infection.
Surgery that involves a prolonged procedure.
The insertion or presence of a foreign body.
Bad oral hygein.
Depressed host defense.
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PREVENTION OF WOUND INFECTION
Principles of prophylaxis:
Choose correct antibiotic.
The antibiotic should be effective against the
organisms most likely to cause infection in the
oral cavity.
The antibiotic chosen should be a narrow-
spectrum antibiotic.
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PREVENTION OF WOUND INFECTION
Principles of prophylaxis:
Choose correct antibiotic.
The antibiotic should be the least toxic antibiotic
available for the patient.
The drug selected should be a bactericidal
antibiotic.
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PREVENTION OF WOUND INFECTION
Principles of prophylaxis:
Choose correct antibiotic.
The antibiotic of choice for prophylaxis before
oral surgery:
penicillin or amoxicillin.
Cephalexin.
Clindamycin.
Azithromycin.
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PREVENTION OF WOUND INFECTION
Principles of prophylaxis:
Antibiotic plasma level must be high.
The drug is given in a dose at least two times the
usual therapeutic dose.
2 g penicillin or amoxicillin.
2 g cephalexin.
600 mg clindamycin.
500 mg. azithromycin.
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PREVENTION OF WOUND INFECTION
Principles of prophylaxis:
Time antibiotic administration correctly.
The time of dosing before surgery varies,
depending on the route used
1 hour for the oral route.
Shorter interval with the intravenous route.
If the surgery is prolonged an additional
antibiotic dose is required.
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PREVENTION OF WOUND INFECTION
Principles of prophylaxis:
Use shortest antibiotic exposure that Is
effective.
Once the surgical procedure is completed,
continued antibiotic administration produces
little or no benefit.
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PROPHYLAXIS AGAINST METASTATIC INFECTION
Infective Endocarditis
Misconception:
All cardiac patients, by definition,
require antibiotic administration before
any dental treatment.
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PROPHYLAXIS AGAINST METASTATIC INFECTION
Infective Endocarditis
AHA Classification of the cardiac patients
Cardiac Conditions Associated with the Highest Risk to IE
Prosthetic cardiac valve
Previous infective endocarditis
Congenital heart disease (CHD): o Unrepaired cyanotic CHD. o Completely repaired congenital heart defect (during the first 6 months after
the procedure) o Repaired CHD with residual defects.
Cardiac transplant recipients who have cardiac valvulopathy
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PROPHYLAXIS AGAINST METASTATIC INFECTION
Infective Endocarditis
ADA categorization of the dental procedures.
Dental Procedures for Which IE Prophylaxis Is Recommended
Minor oral surgeries.
Dental extraction.
Periodontal procedures.
Placement of orthodontic bands.
Interligammentary LA.
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PROPHYLAXIS AGAINST METASTATIC INFECTION
Infective Endocarditis
ADA categorization of the dental procedures.
Dental Procedures for Which IE Prophylaxis Is Not Recommended
Restorative dentistry.
Routine LA injection.
Endodontic therapy using rubber dam.
Suture removal.
Placement of removable appliances.
Making of impressions.
Orthodontic appliance adjustment.
Shedding of primary teeth.
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PROPHYLAXIS AGAINST METASTATIC INFECTION
Infective Endocarditis
Antibiotic regimen.
Route Patient Drug Adult Children
Oral
No
allergy
Amoxicillin
2 g
50 mg/Kg
Penicillin
allergy
Cephalexin
Clindamycin
Azithromycin/
clarithromycin
2 g
600 mg
500 mg
50 mg./Kg. 20 mg./Kg.
15 mg/Kg
Parenteral
No
Penicillin
allergy
Ampicillin
Cefazolin/
ceftriaxone
2 g
1 g
50 mg/Kg
Penicillin
allergy
Cefazolin/
Ceftriaxone
Clindamycin
1 g
600 mg
50 mg/Kg
20 mg/kg
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