Comparison of cleaning methods on debris, surface roughness and static friction of retrieved stainless steel archwires

  • Fabiano Dalla Lana Mattiello Pontifical Catholic University of Rio Grande do Sul
  • Paulo Ricardo Baccarin Matje Pontifical Catholic University of Rio Grande do Sul
  • Kim Beom Kim Saint Louis University
  • Eduardo Gonçalves Mota Pontifical Catholic University of Rio Grande do Sul
  • Eustáquio Afonso Araújo Saint Louis University
  • Eduardo Martinelli de Lima Pontifical Catholic University of Rio Grande do Sul
Keywords: Dental materials, orthodontic wires, biofilms, orthodontic friction.


OBJECTIVE: To evaluate the amount of debris, surface roughness and static friction in retrieved stainless steel (SS) archwires after four weeks of intraoral exposure and afterwards compare the effects of different cleaning methods.
METHODS: The sample gathered seventeen as-received and eighty-five retrieved SS archwire segments, which were allocated in cleaning method groups (N=17): retrieved (RT); sodiumbicarbonate jet (SB-jet); ultrasonic cleaner (U-sonic); alcohol soaked gauze (A-gauze); and steel wool sponge (S-wool). Debris (SEM images), surface roughness (rugosimeter) and static friction
(universal testing machine) were compared between as-received and retrieved SS wires and between cleaning method groups.
RESULTS: Debris and surface roughness were statistically higher in RT wires than in as-received (p<0.001), whereas static friction showed no statistical difference (p>0.05). Debris were significantly lower in groups A-gauze and S-wool than in groups RT, SB-jet and U-sonic (p<0.001). Surface roughness was statistically lower in group S-wool compared to other groups (p<0.001). Static friction showed no statistical difference between cleaning methods (p>0.05).
CONCLUSION: Retrieved SS archwires showed higher debris and surface roughness than asreceived, after four-weeks intraorally. A-gauze and S-wool were effective cleaning methods to control debris, but only S-wool has reduced surface roughness.


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Original Article