title: The efficacy of a plasma arc light in orthodontic bonding: a randomized controlled clinical trial.
abstract: OBJECTIVE
  To evaluate the clinical performance of a plasma arc light (Ortho LITE, 3M Unitek, Monrovia, CA, USA) against a conventional tungsten-quartz halogen curing light (Visilux 2, 3M Unitek, Monrovia, CA, USA) for direct orthodontic bonding.
  
  
  METHODS
  A single centre prospective randomized controlled clinical trial.
  
  
  METHODS
  The Orthodontic Department at St Luke's Hospital, Bradford, UK.
  
  
  METHODS
  Forty-three consecutive patients requiring fixed appliances from the orthodontic waiting list. A split mouth technique was adopted; with quadrants randomly assigned to either the plasma arc light or the conventional halogen curing light and bonded directly with APC pre-adjusted edgewise brackets (3M Unitek, Monrovia, CA, USA).
  
  
  METHODS
  Bracket failures.
  
  
  METHODS
  Time taken to bond-up the appliances, patient sensitivity or discomfort during curing and time to replace failed brackets were investigated.
  
  
  RESULTS
  No statistically significant difference in bracket failure rates over the full course of treatment was found between the plasma arc light (6.7%; 95% CI 4.5-10.0) and the halogen curing light (9.5%; 95% CI 6.8-13.1). There was no statistically significant difference in bracket survival times. The bond-up times were typically reduced by 204 seconds per patient with the plasma arc light. There were no differences in patient reported sensitivity or discomfort or rebond times.
  
  
  CONCLUSIONS
  The plasma arc light is a viable clinical alternative to the conventional halogen curing light with benefits for both the clinician and patient due to reduced bonding times.
authors.affiliation: Department of Orthodontics, St Luke's Hospital, Bradford, UK. joannesrussell@yahoo.co.uk
authors.forename: Joanne S
authors.initials: JS
authors.lastname: Russell
authors.forename: Simon J
authors.initials: SJ
authors.lastname: Littlewood
authors.forename: Andrew
authors.initials: A
authors.lastname: Blance
authors.forename: Laura
authors.initials: L
authors.lastname: Mitchell
mesh_terms: D000134:Acid Etching, Dental; D000293:Adolescent; D000328:Adult; D003188:Composite Resins / Q000737:chemistry; D055117:Curing Lights, Dental; D003722:Dental Alloys / Q000737:chemistry; D004868:Equipment Failure; D005260:Female; D006801:Humans; D055115:Light-Curing of Dental Adhesives; D008297:Male; D008422:Materials Testing; D009532:Nickel / Q000737:chemistry; D016910:Orthodontic Brackets; D009969:Orthodontic Wires; D010147:Pain Measurement; D011446:Prospective Studies; D019279:Resin Cements / Q000737:chemistry; D016019:Survival Analysis; D013997:Time Factors; D014025:Titanium / Q000737:chemistry; D055815:Young Adult
chemical_list: D003188:Composite Resins; D003722:Dental Alloys; D019279:Resin Cements; C516047:Transbond XT Light Cure Adhesive Primer; C040654:titanium nickelide; C095998:Adhesive cement; D009532:Nickel; D014025:Titanium