Abstract | OBJECTIVES: To test the hypotheses that (1) there is no difference in the pain experience during the week following initial placement of two orthodontic appliances (SmartClip and Victory; 3M Unitek, Monrovia, Calif); and (2) there is no difference in the pain experience during removal and insertion of orthodontic archwires with these brackets. MATERIALS AND METHODS: Sixty-six consecutive patients were treated with a self-ligating bracket system (SmartClip) or a conventional appliance (Victory) on the basis of computer-generated random allocation. After appliance placement and engagement of a 0.016'' nickel-titanium archwire, pain experience was recorded after 4, 24, and 72 hours and after 7 days with the use of a visual analog system (VAS) questionnaire. At a subsequent visit, participants documented pain experiences during removal and insertion of 0.019 x 0.025'' archwires on an additional 100 mm VAS questionnaire. Independent t-tests and analyses of covariance were used to analyze normally distributed data; the Mann-Whitney U-test was used for skewed distributions. RESULTS: Forty-eight (72.2%) and fifty-one (77.3%) subjects completed the first and second parts of the study, respectively. Bracket type had no influence on pain experience at 4 hours (P = .958), 24 hours (P = .289), 72 hours ( P = .569), and 7 days (P = .756) following appliance placement. However, bracket type significantly influenced pain experience during archwire removal (P = .001) and insertion (P = .013). CONCLUSIONS: Hypothesis 1 cannot be rejected. The bracket type had no effect on subjective pain experience during the first week after initial placement of two preadjusted orthodontic appliances. Hypothesis 2 was rejected. Significantly greater discomfort was experienced during archwire insertion and removal with the SmartClip appliance.
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Authors | P S Fleming, A T Dibiase, G Sarri, R T Lee |
Journal | The Angle orthodontist
(Angle Orthod)
Vol. 79
Issue 1
Pg. 46-50
(Jan 2009)
ISSN: 0003-3219 [Print] United States |
PMID | 19123718
(Publication Type: Journal Article, Randomized Controlled Trial)
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Chemical References |
- Dental Alloys
- titanium nickelide
- Stainless Steel
- Nickel
- Titanium
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Topics |
- Adolescent
- Dental Alloys
- Facial Pain
(etiology)
- Female
- Humans
- Male
- Nickel
- Orthodontic Appliance Design
- Orthodontic Brackets
(adverse effects)
- Orthodontic Wires
(adverse effects)
- Orthodontics, Corrective
(adverse effects, instrumentation)
- Pain Measurement
- Stainless Steel
- Surveys and Questionnaires
- Time Factors
- Titanium
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