Results of a survey-based study to identify common retention practices in the United States.
BACKGROUND
The purpose of this descriptive study was to use a carefully constructed, pilot-tested survey instrument to identify the most common orthodontic retainers and retention protocols prescribed in the United States as reported by active members of the American Association of Orthodontists.


METHODS
We randomly selected 2000 active members, stratified by region of practice, for the study. Information gathered included, but was not limited to, the types of retainers prescribed in the maxillary and mandibular arches, duration of full-time and part-time wear, use of fixed retainers, appliances fabricated in office vs commercial laboratories, the number of debonds per year, and retention appointment schedules. The survey consisted of 20 questions. Data were gathered on a categorical scale and analyzed.


RESULTS
We received 658 responses (32.9%) during a 12-week period. Maxillary Hawley retainers (58.2%) and mandibular fixed lingual retainers (40.2%) were the most commonly used. Most orthodontists prescribed less than 9 months of full-time wear of removable retainers and thereafter advised part-time, but lifetime wear. Most orthodontists (75.9%) did not instruct patients to have the fixed lingual retainers removed at a specific time. More orthodontists who prescribed Hawley retainers recommended longer full-time wear compared with clear thermoplastic retainers. The timing of scheduled retention appointments varied among clinicians and depended on the number of years in practice, the volume of patients debonded, and the type of prescribed retainer. The only regional difference associated with retainer design was the Northeast region, where mandibular fixed lingual retainers were used less frequently. Female orthodontists did not use mandibular fixed lingual retainers as often as their male counterparts.


CONCLUSIONS
Maxillary Hawley and mandibular fixed lingual retainers are most commonly used. This study is the first to describe retention protocols and the scheduling of retention appointments in the United States.
Valiathan
Manish
M
Department of Orthodontics, Case Western Reserve University, Cleveland, Ohio, USA. mxv13@case.edu
Hughes
Eric
E
D018865:Dental Research; D005260:Female; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000628:therapy*; D018704:Orthodontic Retainers / Q000145:classification / Q000706:statistics & numerical data*; D009971:Orthodontics, Corrective / Q000379:methods / Q000706:statistics & numerical data*; D019239:Practice Patterns, Dentists' / Q000706:statistics & numerical data*; D055502:Secondary Prevention; D018709:Statistics, Nonparametric; D013997:Time Factors; D014085:Tooth Migration / Q000517:prevention & control*; D014481:United States