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Most extrinsic discoloration is readily removed by cleaning the teeth, whether with "whitening" (i.e., abrasive) toothpaste at home, or as treatment carried out by a professional (e.g., scaling and/or polishing). To prevent future buildup of extrinsic stains, identification of the cause (e.g., smoking) is required.
Tooth whitening or tooth bleaching is the process of lightening the colour of human teeth. [1] Whitening is often desirable when teeth become yellowed over time for a number of reasons, and can be achieved by changing the intrinsic or extrinsic colour of the tooth enamel . [ 2 ]
Dental fluorosis is a common [2] disorder, characterized by hypocalcification of tooth enamel caused by ingestion of excessive fluoride during enamel formation. [3] [needs update] It appears as a range of visual changes in enamel [4] causing degrees of intrinsic tooth discoloration, and, in some cases, physical
Eroded tooth enamel: Bulimia: Loss of deciduous and permanent teeth by late childhood: Papillon–Lefèvre syndrome Haim–Munk syndrome: Premature dentition (Natal teeth) Pachyonychia congenita type II: Grey–green discoloration of the mid-portion of permanent teeth: Minocycline-induced pigmentation: Brown discoloration of gingival third of teeth
The patients' age is not a limiting factor for the enamel microabrasion technique but in cases of not fully erupted teeth, it may be difficult to place rubber dam for the microabrasion process [8] Microabrasion is not indicated when discoloration is located in dentin such as in dentigenous imperfecta or tetracycline discoloration.
The purpose of polishing is to remove extrinsic stains, remove dental plaque accumulation, increase aesthetics and to reduce corrosion of metallic restorations. [1] [2] Tooth polishing has little therapeutic value and is usually done as a cosmetic procedure after debridement and before fluoride application. [3]
Amalgam, a common dental restorative material, may turn adjacent areas of teeth black or gray. Long term use of chlorhexidine, a mouthwash, may encourage extrinsic stain formation near the gingiva on teeth. This is usually easy for a hygienist to remove. Systemic disorders also can cause tooth discoloration.
Amalgam deposits can be found within bone occasionally. This can be caused during a surgical procedure e.g. tooth extraction or endodontic surgery, which has caused the material to become inadvertently dislodged from a restoration in an adjacent tooth. These deposits become blackened and can lead to blackening of the adjacent bone. [8]