Canine retraction: A systematic review of different methods used

Area of Science:

• Orthodontics
• Dental Surgery

Background:

• Canine retraction is crucial for correcting dental crowding and aligning teeth after premolar extractions.
• Proper canine positioning is essential for long-term functional, stable, and aesthetic orthodontic outcomes.

Purpose of the Study:

• To systematically review and compare the effectiveness and side effects of various canine retraction methods.
• To identify evidence-based recommendations for optimal canine retraction techniques in orthodontics.

Main Methods:

• A comprehensive literature search was conducted in Medline and Science Direct databases (1985-2014).
• Included studies were randomized controlled trials (RCTs), prospective/retrospective controlled studies, and clinical trials.
• Two independent reviewers selected studies and extracted data, assessing study quality.

Main Results:

• Twenty-two studies met the inclusion criteria from 324 initial articles.
• Various methods like elastomeric chains, elastic threads, magnets, NiTi coil springs, corticotomies, distraction osteogenesis, and laser therapy demonstrated optimal tooth movement rates.
• Most techniques resulted in some degree of anchorage loss, with significant heterogeneity and methodological limitations across studies.

Conclusions:

• Current scientific evidence is insufficient to definitively rank canine retraction methods by efficiency due to study heterogeneity and limitations.
• High-quality randomized controlled trials with adequate sample sizes are required to establish the most effective canine retraction techniques.
• Future research should also investigate patient acceptance, cost-effectiveness, and the role of implants or minor surgeries in canine retraction.