Oral health basics
Discover foundational tips and practices to improve your oral hygiene and prevent common dental issues.
Choosing Wisely Canada (CWC) is the national voice for reducing unnecessary tests and treatments in the Canadian health care system. These unnecessary interventions can expose patients to potential harm, strain limited health care resources, and contribute to the climate crisis.
CWC identifies commonly overused tests and treatments that offer little or no value to patient care. They support health care providers and organizations in integrating these evidence-based recommendations into their routine practice.
In 2018, CWC partnered with the Canadian Association of Hospital Dentists (CAHD) to develop an evidence-based list of eight tests and treatments to question in dentistry. Effective 2025, the CDA officially assumed stewardship of this list and is equally available with sources on the Choosing Wisely Canada website.
Irreversible pulpitis or toothache occurs when the soft tissue and nerve inside the tooth (the dental pulp) becomes damaged because of decay, trauma, or large fillings. The intense pain is caused by inflammation of the dental pulp and the tissue surrounding the root—not by infection. Because this is not an infection, antibiotics do not relieve the pain and should not be used. Treatment for this condition is the removal of the damaged or diseased dental pulp, either through root canal therapy or extraction of the tooth. Inflammatory dental pain is best managed by NSAIDs.
An acute dental abscess is a localized infection that occurs due to an untreated infection of the dental pulp. Root canal therapy or extraction of the tooth, along with drainage of the abscess, is required to remove the infected tissue. Antibiotics are of no additional benefit. In the event of systemic complications (e.g., fever, lymph node involvement, or spreading infection), or for an immunocompromised patient, antibiotics may be prescribed in addition to drainage of the abscess. When antibiotics are used, consider strategies such as delayed prescriptions and/or shortened durations with reassessment for antibiotic resistance risk mitigation.
Infections of orthopedic implants are uncommon events and are rarely caused by bacteria found in the mouth. Although dental procedures such as extractions cause transient bacteremia, most bacteremia of oral origin occurs with activities of daily living, including brushing, flossing, and chewing. There is no reliable evidence that antibiotics before dental procedures prevent prosthetic joint infections. Patients should not be exposed to the adverse effects of antibiotics when there is no evidence of benefit.
There is no convincing evidence that oral bacteria from dental procedures cause infections of the following devices at any time after implantation: pacemakers; implantable defibrillators; ventriculoatrial/ventriculoperitoneal shunts; devices for patent ductus arteriosus, atrial septal defect, and ventricular septal defect occlusion; peripheral vascular stents; prosthetic vascular grafts; hemodialysis shunts; coronary artery stents; dacron parotid patches; and chronic indwelling central venous catheters.
Dental restorations (fillings) fail due to excessive wear, fracture of material or tooth, loss of retention, or recurrent decay. Drilling to remove and replace fillings can weaken teeth and decrease their lifespan. Small defects should be repaired. Age of a filling should never be used as criteria for replacement.
Dental amalgam is a safe, affordable and effective dental material. Removal of amalgams, if the restoration is otherwise sound or can be repaired, is unnecessary, expensive, and may subject the individual to absorption of small doses of mercury. Furthermore, placement of composite resin restorations is known to cause a transient increase in urinary Bisphenol-A levels, for which there are unknown health effects. High-quality evidence suggests higher failure rates in composite resins versus amalgam restorations.
A preventive approach to the management of dental decay and a focus on long-lasting conservative restorations when they are truly indicated allows dental care to be delivered in a more environmentally sustainable way. Dental materials have an impact on the environment through all phases of manufacturing, procurement, clinical use and waste disposal. Use of rubber dam, high volume suction and mandated separation of amalgam waste contribute to both patient safety and planetary health.
Dentists are required to provide services within the context of provincial directives from the provincial health authority. When directives prohibit non-essential dental visits, urgent care must be provided to relieve pain and treat infections. Critical dental services should be prioritized to minimize harm to patients from delaying care and be provided in a way that protects patients and dental personnel. The latter includes interim stabilization of the dental problem; minimization of aerosol-generating procedures; and use of appropriate PPE and other IPAC measures as advised by provincial health authorities/regulators. Strategies should be developed to monitor patients whose care has been cancelled or delayed.
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