Orthodontic thermoformed retainers: a two‐arm laboratory study into post‐fabrication outcomes

Doğramacı, Esma J.; Chubb, Dwr; Rossi‐Fedele, Giampiero

doi:10.1111/adj.12610

Cited by 7 publications

(4 citation statements)

References 27 publications

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“…This slight extrusion was probably due to the difficulty of accurately predicting the final thickness of the vacuum‐formed maintainer after thermoforming. It is known that the thermoforming process reduces the thickness of a vacuum‐formed appliance, compared to the original dimension of the thermoplastic sheet 28 . Thus, some residual interocclusal space might be present after the thermoforming process, allowing limited extrusion movement 28 .…”

Section: Discussionmentioning

confidence: 99%

“…It is known that the thermoforming process reduces the thickness of a vacuum‐formed appliance, compared to the original dimension of the thermoplastic sheet 28 . Thus, some residual interocclusal space might be present after the thermoforming process, allowing limited extrusion movement 28 . The banded space maintainers allow free antagonist tooth extrusion, but in several patients this vertical movement can be inhibited by occlusal contact involving any of the teeth adjacent to the extraction space, and this occlusal contact may already be present before extraction or arise after a small extrusion movement.…”

Section: Discussionmentioning

confidence: 99%

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Short‐term efficacy of vacuum‐formed maintainer for deciduous second molar space maintenance in the mixed dentition: A single‐centre, randomized controlled clinical trial

Barros

Siqueira

Janson

et al. 2021

Orthod Craniofacial Res

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Objective To compare the efficacy of vacuum‐formed and banded space maintainers for deciduous second molar space maintenance during the mixed dentition. Setting and Sample Population The study sample comprised thirty children in the mixed dentition (age range, 5.9 to 9.8 years) with early loss of at least one deciduous second molar. Methods This was a parallel‐group, randomized, active‐controlled clinical trial. Patients were randomly allocated to space maintenance performed with vacuum‐formed or banded space maintainers with a 1:1 allocation ratio. The main outcome was any change in mesiodistal width of the extraction space. Secondary outcomes included the lingual rolling or axial rotation of the permanent first molar adjacent to the extraction site and extrusion of the antagonist tooth. Dental casts were obtained before appliance installation (T0), after 3 months (T1) and after 6 months (T2). Digital dental casts were measured using Dolphin 3D software. Chi‐square, t test or Mann‐Whitney and ANOVA or Friedman test were used for intra‐ and intergroup comparisons (P < .05). Results Baseline characteristics were similar between groups except for chronological age. Statistically, but not clinically significant space loss (mean, 0.32 mm; SD, ± 0.39) occurred with the vacuum‐formed space maintainer only at the first trimester (T0‐T1). Lingual rolling and axial rotation of the first permanent molar were not significant, as well as extrusion of the antagonist tooth. Conclusions The results of this study suggested that both tested devices were effective in maintaining space after early extraction of the deciduous second molar over a period of 6 months.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Short‐term efficacy of vacuum‐formed maintainer for deciduous second molar space maintenance in the mixed dentition: A single‐centre, randomized controlled clinical trial

Barros

Siqueira

Janson

et al. 2021

Orthod Craniofacial Res

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“…The following patient-centred questions, which "patients care about" for the management of peripheral arterial disease, could also be considered by clinicians prior to providing endodontic treatment (Smolderen et al, 2018) Collaborations with patients, or patient representatives, or both, can lead to more effective knowledge translation in routine clinical practice. This relies on the research data that has been co-produced by them to being successfully collected and transferred to researchers and clinicians in a manner that can be easily integrated into a shared decision-making (Etkind et al, 2015), from which ensues obtaining informed consent prior to treatment (Doğramacı et al, 2018(Doğramacı et al, , 2021Rossi-Fedele et al, 2020).…”

Section: Considerations For Future Clinical and Research Activitiesmentioning

confidence: 99%

“…Collaborations with patients, or patient representatives, or both, can lead to more effective knowledge translation in routine clinical practice. This relies on the research data that has been co‐produced by them to being successfully collected and transferred to researchers and clinicians in a manner that can be easily integrated into a shared decision‐making (Etkind et al, 2015), from which ensues obtaining informed consent prior to treatment (Doğramacı et al, 2018, 2021; Rossi‐Fedele et al, 2020).…”

Section: Considerations For Future Clinical and Research Activitiesmentioning

confidence: 99%

Patient‐related outcomes and Oral Health‐Related Quality of Life in endodontics

Doğramacı

Rossi‐Fedele

2022

Int Endodontic J

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There is increased interest in outcome measures that complement the classic goal of endodontics, being the prevention and healing of apical periodontitis. Possible outcome measures can be subdivided into patient‐centred outcomes (PCOs), encompassing data collected by nonpatients aiming to assess the effectiveness of an intervention and patient‐reported outcomes (PROs), which are reported directly by the patient. PROs can be subsequently classed into PRO measures that ascertain patients' view of their symptoms, their functional status, and their health‐related quality of life, and patient‐reported experience measures that focus on aspects including the humanity of care, patient satisfaction, patient preference and adherence, personal costs, expectation fulfilment, and decision regrets. The present review aims to define various patient‐related outcomes and discuss the literature available regarding PCOs and PROs in endodontics. This includes those proposed to assess the effectiveness of endodontic treatment for pulpitis and apical periodontitis for use in the development of European Society of Endodontology S3‐level clinical practice guidelines that have been included by all working groups, except for the radiographic assessment of apical periodontitis. Based on limited evidence in the field, it can be summarized that after recall periods of various lengths, endodontic treatment is associated with a high likelihood of tooth survival and limited need for further intervention, including extraction and further restorative procedures. Oral Health‐Related Quality of Life (OHRQoL) is likely to improve following the completion of treatment. Nonetheless, the literature assessing the association between OHRQoL and endodontics is hampered by the use of instruments that have not been previously validated. Amongst the remaining outcome measures discussed in the present review, it is worth highlighting that there is only one study assessing exacerbations in teeth with the presence of endodontic pathosis, which suggests a very low incidence of this adverse effect following endodontic treatment. Patients' expectation fulfilment, adherence, and satisfaction are closely inter‐related and depend also on various nonclinical factors. Further studies assessing PCOs and PROs, in association with healing and prevention of apical periodontitis, are required to better understand endodontic treatment from the perspective of patients.

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Assessment of wear characteristics, longevity and stiffness of Essix-type retainers

Alfadil,

Patel,

Pandis

et al. 2024

Clin Oral Invest

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Objective To compare four commercially available Essix-type retainers in terms of longevity, wear characteristics, stiffness and their range of rigidity. Materials and methods An in vitro study was conducted at Queen Mary University of London. Four groups of thermoplastic materials were included: Duran (PETG), Essix C + (Polypropylene), Vivera and Zendura (Polyurethane). A working typodont was fabricated to evaluate surface wear characteristics using a wear machine with a customized jig. Retainers were measured for tensile test, and water absorption was measured at five different time points up to 6 months after initial immersion in two different physical states and two different solutions. Hydrolytic degradation was also evaluated using FTIR spectroscopy. Results Essix C + was the most flexible retainer with Vivera the stiffest material. Zendura and Essix C + had the most surface wear (413 μm ± 80 and 652 μm ± 12, respectively) with absorption rates of up to 15 wt% in artificial saliva occurring with Zendura. Only Essix C + displayed signs of degradation following water absorption. Conclusions All materials had characteristic levels of flexibility and were susceptible to water absorption. Duran 1.5 mm performed similarly to Vivera in relation to stiffness and wear properties. While Zendura and Vivera have similar chemical structures, they exhibited differences concerning wear resistance and water absorption. Further clinical research evaluating the clinical relevance of these laboratory findings is required. Clinical relevance Characteristic patterns of wear and rigidity of four commercially available Essix-type retainers were observed. This information should help in the tailoring of retainer material on a case-by-case basis considering treatment-related factors and patient characteristics including parafunctional habits.

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Orthodontic thermoformed retainers: a two‐arm laboratory study into post‐fabrication outcomes

Cited by 7 publications

References 27 publications

Short‐term efficacy of vacuum‐formed maintainer for deciduous second molar space maintenance in the mixed dentition: A single‐centre, randomized controlled clinical trial

Short‐term efficacy of vacuum‐formed maintainer for deciduous second molar space maintenance in the mixed dentition: A single‐centre, randomized controlled clinical trial

Patient‐related outcomes and Oral Health‐Related Quality of Life in endodontics

Assessment of wear characteristics, longevity and stiffness of Essix-type retainers

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