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. Author manuscript; available in PMC: 2016 Dec 16.
Published in final edited form as: Am J Orthod Dentofacial Orthop. 2011 Oct;140(4):520–526. doi: 10.1016/j.ajodo.2010.10.023

Table II.

Summary of questionnaire responses

Question Responses (n) Minimum Mean Median Maximum SD
How many hours per day do you require patients to wear their retainers during the retention phase of treatment? (0–24 hours) 1362 3.4 17.1 19.4 24.0 5.8
How long does your retention phase last? (0–1 year) 1362 0.0 0.8 1.0 1.0 0.3
How many hours per day do you require patients to wear their retainers during the post-retention phase of treatment? (0–24 hours) 1109 0.0 8.6 8.2 24.0 2.9
How long does your post-retention phase last? (0–6 year) 171 0.0 3.4 3.2 6.0 1.6
What percentage of your patient population receives Hawley retainers for the maxillary arch? 1362 0.0 53.6 60.0 100.0 36.7
What percentage of your patient population receives vacuum-form retainers for the maxillary arch? 1362 0.0 47.5 45.0 100.0 37.1
What percentage of your patient population receives fixed retention for the maxillary arch? 1362 0.0 13.0 5.0 100.0 22.7
What percentage of your patient population receives Hawley retainers for the mandibular arch? 1362 0.0 32.6 15.0 100.0 34.9
What percentage of your patient population receives vacuum-form retainer for the mandibular arch? 1362 0.0 32.7 11.0 100.0 36.4
What percentage of your patient population receives fixed retention for the mandibular arch? 1362 0.0 48.0 40.0 100.0 39.4
What percentage of your patient population receives a fiberotomy following treatment? 1362 0.0 4.1 1.0 100.0 10.2
How long do your patients continue to return to your practice for scheduled retainer check appointments? (0–10 + years) 1362 0.0 2.9 2.3 10.0 2.2
How often do your patients return for retainer checks? (0–6 times per year) 1362 0.0 2.1 1.9 6.0 1.3
How long after debonding do you begin charging for retainer checks? (0–4 years) 127 0.0 1.2 1.0 4.0 18.4
When you charge for retainer checks, what is the average fee charged? ($0–200) 138 0.0 52.9 26.5 196.0 1.0
What percentage of patients do you believe to be compliant with your retention protocols six months following bebonding? 1362 1.0 69.4 75.0 100.0 17.5
What percentage of patients do your believe to be complaint with your retention protocols one year following debonding? 1362 2.0 57.5 60.0 100.0 20.5
What percentage of patients do you believe to be compliant with your retention protocols three years following debonding? 1362 0.0 39.4 38.0 100.0 21.5
What percentage of patients do you believe to be complaint with your retention protocols five years following debonding? 1362 0.0 29.8 25.0 100.0 21.5