Orthodontic retention practices in the Republic of Ireland · 2018-09-03 · Objective • To...
Transcript of Orthodontic retention practices in the Republic of Ireland · 2018-09-03 · Objective • To...
Objective• To identify the retention practices of specialist orthodontists in
the ROI.
Fig. 1 (A-C): Types of retainers
A– Upper Hawley retainer B– Lower fixed/bonded retainer (BR)
C - Upper and lower vacuum-formed retainers (VFR)
Materials and methods• A pilot-tested questionnaire was distributed to specialist
orthodontists in the ROI registered with the Dental Council of
Ireland and/or the Orthodontic Society of Ireland (n=123).
• Questions addressed retainer type, operator factors influencing
retainer choice, frequency of retainer checks and prescribed
retainer wear.
• Data were analysed using PASW® version 18.
Conclusions• VFRs are the most common retainer choice in the maxilla and the
mandible for specialist orthodontists in the ROI.
• Most respondents advised life-time wear of retainers.
References1.BSI. British Standards Institute Glossary of Dental Terms (BS4492). BSI, London. 1983.2.Littlewood S, Russell JS, RJ. S. Why do Orthodontic Cases Relapse? Orth Update. 2009;02:038-44.3 Renkema AM, Helene Sips ET, Bronkhorst E, Kuijpers-Jagtman AM. A survey on orthodontic retention procedures in the Netherlands. Eur J Orthod. 2009;31:432-7.4.Littlewood SJ, Millett DT, Doubleday B, Bearn DR, Worthington HV. Retention procedures for stabilising tooth position after treatment with orthodontic braces. Cochrane Database Syst Rev. 2006(1):CD002283.
BR VFR Hawley BR & VFRcombined
Other
3
53
1816
10
19
33
13
28
7
%
Response
Retainer type
Fig. 2: Most commonly used maxillary and mandibular retainer types
Maxilla ( N=94) Mandible ( N=93)
85
7159
49 46 4538
36
177 7 4
Response
number
Factors
Fig. 3: Operator factors that influence retainer choicePre-tx situation Oral hygiene situation Periodontal situationMotivation Wish of patient/parent End resultInterdigitation after treatment Age Anatomy of teethMyofunctional aspects Other factors Third molars
Introduction• Orthodontic relapse is the return, following correction of the
features of the original malocclusion1 and has been described as arguably the most common risk for orthodontic patients2 .
• When active orthodontic treatment has been completed, almost every patient is provided with some form of retainer type (Fig. 1 (A-C)) to minimise the risk of relapse.3
• Several retainer types and practices have been described but there is a lack of scientific evidence regarding retainer appliance type and practice.4
• Studies have been carried out to determine retention practices in several countries, but little information exists for the Republic of Ireland (ROI).
Results• Response rate was 82% (65 males; 36 females). • Fig. 2 shows the most commonly used maxillary and mandibular
retainer types. • Fig. 3 shows the operator factors that influenced retainer type choice.• During the first year post-orthodontic treatment, 93% of specialist
orthodontists carried out 2-4 retention checks following placement of a BR compared to 91% following placement of a removable retainer (RR)
• 76% of specialist orthodontists prescribed a period of full-time wear for RRs in the maxilla following comprehensive orthodontic treatment compared to 70% in the mandible.
• Night-time/’sleeping hours’ was the part-time wear protocol recommended by 72%.
• Patients prescribed RRs were advised life-time wear by 78% compared to those prescribed BRs who were advised life-time wear by 67%.
Design and setting• National, questionnaire based survey.
Orthodontic retention practices in the Republic of Ireland
M.J Meade* and D.T Millett
Cork University Dental School and Hospital, University College Cork, Ireland