Wear and tear from sliding mechanics.
Siatkowski
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D003481:Cuspid; D006801:Humans; D008855:Microscopy, Electron, Scanning; D016910:Orthodontic Brackets / Q000009:adverse effects*; D009969:Orthodontic Wires / Q000009:adverse effects*; D013499:Surface Properties; D014087:Tooth Movement Techniques / Q000009:adverse effects / Q000295:instrumentation