Clinical trial NCT02996292: Treatment of Crowding Without Extraction Using Self Ligating Brackets
Official title: Assessment of Dentoalveolar Changes Resulting From Orthodontic Treatment of Crowding With Self-ligating Brackets Using CBCT Randomized Controlled Trial
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Crowding
Keywords: Crowding
Self ligating
CBCT
RCT
Lead sponsor: Damascus University
Sponsor class: OTHER
First posted: 2016-12-19
Enrollment: 60
Sex: ALL
Minimum age (years): 14
Maximum age (years): 24
Standard ages: CHILD
ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

Brief summary: This experimental study will evaluate the effect of active and passive self-ligating brackets in treatment of crowding, compared with the control group of conventional brackets in class I malocclusion without extraction.

The study sample will consist of 66 patients with 3-6mm crowding. The sample will be allocated randomly into two experimental groups, in addition to a control group.

The brackets will be applied using indirect bonding method for all patients. The dentoalveolar changes occurring after leveling and alignment teeth will be assessed by using CBCT radiographs; pre and post- treatment changes for each group will be evaluated individually.

Detailed description: Producing of modern and various brackets systems both self- ligating and conventional make the 3 dimensional important in order to evaluate the root positions and to investigate EARR in multi root teeth, so the research will depend on CBCT to carry out these purposes in our study. Beside to compare the duration of alignment among groups.

Fixed appliances will be applied into three groups as 1. Active self ligating brackets (ASLB), 2. Passive self ligating brackets (PSLB), 3. Conventional brackets (CB) until reach to wire 19\*25 S.S upper and lower. During leveling, thermal activated wires will be used in all patients.

CBCT images will be done before and after leveling and alignment of teeth to compare dentoalveolar changes between study groups.

Eligibility criteria: Inclusion Criteria:

* patients permanent dentition stage.
* crowding up to 6 mm
* Class I relationship.
* Good oral hygiene.

Exclusion Criteria:

* Poor oral hygiene.
* Previous orthodontic treatment.
* Patients with syndromes, clefts, or craniofacial abnormalities.
* Class II or III skeletal anteroposterior relationship.
* Crowding less than 3mm and more than 6mm.

Primary outcomes:
measure: Speed of alignment
timeFrame: After 9 months
Secondary outcomes:
measure: Changes of the torque and tipping of teeth
timeFrame: Evaluation before and after alignment and leveling teeth. (after 9 months)
measure: Changes of widths and depths of the dental arches
timeFrame: Evaluation before and after alignment and leveling teeth. (after 9 months)
measure: External apical root resorption
timeFrame: After 9 months
Other outcomes:
Locations:
city: Damascus
country: Syrian Arab Republic
facility: Damascus University
Study officials:
affiliation: Department of Orthodontics, Faculty of Dentistry, Damascus University, Damascus, Syria
name: Ahmad S Burhan, PhD.
role: STUDY_CHAIR
References:
citation: Badawi HM, Toogood RW, Carey JP, Heo G, Major PW. Torque expression of self-ligating brackets. Am J Orthod Dentofacial Orthop. 2008 May;133(5):721-8. doi: 10.1016/j.ajodo.2006.01.051.
citation: Chan EK, Darendeliler MA, Petocz P, Jones AS. A new method for volumetric measurement of orthodontically induced root resorption craters. Eur J Oral Sci. 2004 Apr;112(2):134-9. doi: 10.1111/j.1600-0722.2004.00118.x.
citation: Chen SS, Greenlee GM, Kim JE, Smith CL, Huang GJ. Systematic review of self-ligating brackets. Am J Orthod Dentofacial Orthop. 2010 Jun;137(6):726.e1-726.e18; discussion 726-7. doi: 10.1016/j.ajodo.2009.11.009.
citation: Garcia-Figueroa MA, Raboud DW, Lam EW, Heo G, Major PW. Effect of buccolingual root angulation on the mesiodistal angulation shown on panoramic radiographs. Am J Orthod Dentofacial Orthop. 2008 Jul;134(1):93-9. doi: 10.1016/j.ajodo.2006.07.034.
citation: Lagravere MO, Carey J, Toogood RW, Major PW. Three-dimensional accuracy of measurements made with software on cone-beam computed tomography images. Am J Orthod Dentofacial Orthop. 2008 Jul;134(1):112-6. doi: 10.1016/j.ajodo.2006.08.024.
citation: Morina E, Eliades T, Pandis N, Jager A, Bourauel C. Torque expression of self-ligating brackets compared with conventional metallic, ceramic, and plastic brackets. Eur J Orthod. 2008 Jun;30(3):233-8. doi: 10.1093/ejo/cjn005.
citation: Sifakakis I, Pandis N, Makou M, Eliades T, Bourauel C. A comparative assessment of the forces and moments generated at the maxillary incisors between conventional and self-ligating brackets using a reverse curve of Spee NiTi archwire. Aust Orthod J. 2010 Nov;26(2):127-33.