OBJECTIVE: To investigate the degree of debris, roughness, and friction of stainless steel orthodontic archwires before and after clinical use. MATERIALS AND METHODS: For eight individuals, two sets of three brackets (n = 16) each were bonded from the first molar to the first premolar. A passive segment of 0.019- x 0.025-inch stainless steel archwire was inserted into the brackets and tied by elastomeric ligature. Debris level (via scanning electron microscopy), roughness, and frictional force were evaluated as-received and after 8 weeks of intraoral exposure. Mann-Whitney, Wilcoxon signed-rank, and Spearman correlation tests were used for statistical analysis at the .05 level of significance. RESULTS: There were significant increases in the level of debris (P = .0004), roughness of orthodontic wires (P = .002), and friction (P = .0001) after intraoral exposure. Significant positive correlations (P < .05) were observed between these three variables. CONCLUSION: Stainless steel rectangular wires, when exposed to the intraoral environment for 8 weeks, showed a significant increase in the degree of debris and surface roughness, causing an increase in friction between the wire and bracket during the mechanics of sliding.
OBJECTIVE: To investigate the degree of debris, roughness, and friction of stainless steel orthodontic archwires before and after clinical use. MATERIALS AND METHODS: For eight individuals, two sets of three brackets (n = 16) each were bonded from the first molar to the first premolar. A passive segment of 0.019- x 0.025-inch stainless steel archwire was inserted into the brackets and tied by elastomeric ligature. Debris level (via scanning electron microscopy), roughness, and frictional force were evaluated as-received and after 8 weeks of intraoral exposure. Mann-Whitney, Wilcoxon signed-rank, and Spearman correlation tests were used for statistical analysis at the .05 level of significance. RESULTS: There were significant increases in the level of debris (P = .0004), roughness of orthodontic wires (P = .002), and friction (P = .0001) after intraoral exposure. Significant positive correlations (P < .05) were observed between these three variables. CONCLUSION: Stainless steel rectangular wires, when exposed to the intraoral environment for 8 weeks, showed a significant increase in the degree of debris and surface roughness, causing an increase in friction between the wire and bracket during the mechanics of sliding.
Authors: M V Alfonso; E Espinar; J M Llamas; E Rupérez; J M Manero; J M Barrera; E Solano; F J Gil Journal: J Mater Sci Mater Med Date: 2013-02-26 Impact factor: 3.896
Authors: Abdul Razzak A Ghazal; Mohammad Y Hajeer; Rabab Al-Sabbagh; Ibrahim Alghoraibi; Ahmad Aldiry Journal: Prog Orthod Date: 2015-05-20 Impact factor: 2.750