Teeth whitening refers to the process of periodically cleaning tooth surfaces using therapeutic instruments or chemical agents. This induces physical and chemical reactions on the tooth surface to remove plaque, tartar, and stains, eliminate bad breath, and whiten teeth. Common methods include tooth polishing, scaling, air polishing, and laser whitening.
Dental polishing employs specialized instruments to remove extrinsic stains and supragingival plaque, creating a smooth, lustrous surface. This delays plaque and stain reattachment while enhancing aesthetics. Potential adverse effects include bacteremia, tooth structure wear, and pulp or gingival injury.
Scaling employs scaling instruments to remove supragingival calculus, plaque, and surface stains, followed by tooth polishing to delay plaque and calculus redeposition. Potential adverse reactions include dentin hypersensitivity and bacteremia.
Air polishing employs air and water to propel abrasive particles (sodium bicarbonate) onto tooth surfaces via a controlled handpiece, removing calculus and plaque while whitening teeth. Potential adverse effects include bacteremia, gingival injury, and facial emphysema.
Cold light whitening involves using cold light to penetrate whitening agents into tooth tissue, achieving teeth whitening through chemical bleaching. Potential side effects include short-term sensitivity to hot/cold temperatures and mild enamel demineralization.
It appears that each dental whitening method causes some degree of damage to teeth. However, cold light whitening causes relatively minor damage, most of which is reversible, making it the safest option, though it comes at a higher cost. Additionally, regardless of the method chosen, only by visiting a reputable hospital and consulting an experienced dentist can risks be minimized.