Different strategies used in the retention phase of orthodontic treatment

Abstract

OBJECTIVE: To identify most frequent clinical conducts, considering the following variables: 1) used appliances; 2) time of use; 3) protocol of use in daily hours and evolution with along time; 4) percentage of patients in follow up 1 year after treatment; and 5) most frequent observed relapses.. METHODS: It was used a questionnaire distributed to all specialization course of Orthodontics inscribed in the Brazilian Federal Council of Dentistry until October of 2005. RESULTS AND CONCLUSION: It was obtained 91 valid questionnaires. For data analysis were used descriptive statistics and chi-square for linear tendency and chi-square for linear trend and chi-square for multivariate linear trend. We can conclude that: 1) on upper arch, the most used appliances were Hawley, wraparound and acetate plate; in the lower multi-stranded rod, steel rod not bonded to incisors and rod bonded to the incisors; 2) it was indicated its use for more than 24 months for the upper arch, with a trend toward its less use than in the lower arch; 3) the protocol of use in the upper arch begins with 24 hours/day, reducing after the second year; for the lower arch the protocol of hours/day was kept stable; 4) after 1 year of retention most than 50% of treated cases were re-examined; 5) most common relapses were crowding, giroversion and opening of diastemas.

A Survey of Retention Practices and Protocols Followed among Orthodontists in India

“…The type of retainer commonly used in mandible is fixed (44.5%) [ Table 2 ]. This result in the present study is in tandem with the survey conducted in Australia and New Zealand,[ 7 ] the Netherlands,[ 9 ] the USA,[ 11 12 ] Brazil,[ 13 ] Norway,[ 14 ] Switzerland,[ 15 17 ] Saudi Arabia,[ 20 ] and in Holland. [ 23 ] Minimal patient compliance may be the reason for the preference given to fixed lingual retainers, besides being esthetic and inconspicuous in nature.…”

“…The second preferred choice of the removable retainer in maxilla by Indian orthodontists was Hawley (22.1%) in the present study [ Table 3 ]. Hawley was the preferred retainer according to the studies performed in the USA by Keim,[ 6 8 18 ] Valiathan and Hughes,[ 11 ] and Pratt et al .,[ 12 ] Wong and Freer[ 7 ] in Australia and New Zealand, Renkema et al .,[ 9 ] in the Netherlands and Lima et al .,[ 13 ] Brazil and Al-Jewair et al . [ 20 ] in Saudi Arabia.…”

“…[ 4 5 ] There is no prescribed set of retention regimen or guidelines available because of lack of evidence at the highest level. [ 3 ] A few National Survey-based studies on orthodontic retention practices that were followed in different countries were carried out over the past two decades[ 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 ] [ Table 1 ]. The results revealed a variation in retention protocols among orthodontists in different regions and a change in trends over a period of time.…”

Users’ perceptions and preferences towards maxillary removable orthodontic retainers: a crossover randomized clinical trial

“…4,5,6,7,8,9,12,13,14,15,16,17 The most commonly used maxillary orthodontic retainers are removable, especially the Hawley plate, the WA, and the CT, whose preferences vary according to country or region. 2,3,16,18,19,20,21,22,23 The WA was selected for this study in relation to the Hawley plate, because the aim was to evaluate the influence of the different palatal acrylic designs, and the occlusal interference generated by the Hawley retaining clasps could impair this evaluation. Thinner maxillary removable retainers appear to generate less interference in speech.…”

Orthodontist and periodontist’s knowledge, attitudes and aspects of clinical practice, regarding fixed lower orthodontic retainers

“…The use of retainers is desired at the end of orthodontic treatment, to prevent relapse of dental movements. 1 - 5 Orthodontists are more likely to indicate fixed retainers adapted to the lower arch, because of tooth instability in the region, which requires longer stabilization periods. 1 , 2 , 6 - 10 Fixed retainers are more aesthetic, do not depend on patient cooperation, 6 , 8 , 11 , 12 and may be individualized for the diagnosis and treatment performed.…”