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| Name | Class |
|---|---|
| Heidelberg Engineering GmbH | INDUSTRY |
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Optical coherence tomography (OCT) is a medical diagnostic tool, providing non-invasive, non-radiative and high resolution imaging. OCT has been established since many years in ophthalmology. In dentistry the diagnostic potential of OCT is currently increasingly being noticed. This clinical study includes two individual trials: (i) Longitudinal assessment of surface sealant thickness using optical coherence tomography and (ii) comparison of crevicular fluid levels of inflammatory cytokines after the application of surface sealants.
Trial 1: Evaluation of the abrasion behavior of the orthodontic surface sealants Pro Seal®, Opal®Seal, and Protecto®CaF2Nano. The quadrants of 20 participants will be randomly assigned to four study groups. Using a split mouth design three commonly used orthodontic surface sealants (Pro Seal®, Opal®Seal, and Protecto®CaF2Nano) and a bonding primer (Transbond XT) which is used as a control will be applied to the labial surfaces of the teeth of the respective quadrants. The thickness changes of the orthodontic surface sealants and the development of enamel demineralization will be monitored at the day of the application and five additional time points (t1= 1 month, t2= 3 months, t3= 6 months, t4=9 months, t5= 12 months) using OCT.
Trial 2: Evaluation of Adverse effects of orthodontic surface sealants. 15 quadrants of the trial group described above (Trial1) will be randomly selected and gingival crevicular fluid (GCF) will be sampled in the respective quadrants at the day of bracket bonding prior (t0) and at three additional time points (t1= 30 min, t2= 60 min, t3= 90 min) after the application of surface sealants or the bonding primer, respectively. Analysis will be performed using magnetic Luminex screening assays for IL-8 (Interleukin 8), and IL-10 (Interleukin 10) and examined for inflammatory cytokines after the application of surface sealants.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Transbond XT | Active Comparator | Application of different orthodontic surface sealants to participants: Randomly assigned quadrants in this arm will receive a bonding primer (Transbond XT) The investigators will evaluate in this arm
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| Protecto®CaF2Nano | Experimental | Application of different orthodontic surface sealants to participants: Randomly assigned quadrants in this arm will receive an orthodontic surface sealant (Protecto®CaF2Nano). The investigators will evaluate in this arm
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| Pro Seal® | Experimental | Application of different orthodontic surface sealants to participants: Randomly assigned quadrants in this arm will receive an orthodontic surface sealant (Pro Seal®). The investigators will evaluate in this arm
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| Opal® Seal | Experimental | Application of different orthodontic surface sealants to participants: Randomly assigned quadrants in this arm will receive an orthodontic surface sealant (Opal®Seal). The investigators will evaluate in this arm
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Transbond XT | Device | Application of • Transbond XT (activator comparator) to labial surfaces of teeth of randomized quadrants. |
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| Measure | Description | Time Frame |
|---|---|---|
| Abrasion behaviour of orthodontic surface sealants | Longitudinal assesment of surface sealant thickness using optical coherence tomography | The thickness changes of the orthodontic surface sealants and the development of enamel demineralization will be monitored at the day of the application and five additional time points (t1= 1 month, t2= 3 months, t3= 6 months, t4=9 months, t5= 12 months) |
| Measure | Description | Time Frame |
|---|---|---|
| Adverse effects of orthodontic surface sealants | To evaluate possible adverse effects of orthodontic surface sealants in vivo gingival crevicular fluid will be sampled in the respective quadrants at the day of bracket bonding prior (t0) and at three additional time points (t1= 30 min, t2= 60 min, t3= 90 min) after the application of surface sealants or the bonding primer. Existing data on possible adverse effects of resin monomers from restorative composites or surface sealants were obtained using 3D tissue models; therefore, in the present study the investigators will attempt to evaluate possible adverse effects of commonly used smooth surface sealants on gingival tissues by analysing inflammatory cytokines in crevicular fluid of the participants after the application of surface sealants.To this end, the levels of the inflammatory cytokines (IL-8 (Interleukin 8), and IL-10 (Interleukin 10) in GCF will be assessed using multiplex analysis. |
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Inclusion Criteria:
Exclusion Criteria:
• withdrawn consent
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Sinan Sen, Dr. | Contact | 0049622156 | 6583 | sinan.sen@med.uni-heidelberg.de |
| Name | Affiliation | Role |
|---|---|---|
| Sinan Sen, Dr. | Department of Orthodontics and Dentofacial Orthopaedics, University of Heidelberg | Study Director |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Department of Orthodontics and Dentofacial Orthopaedics, University of Heidelberg | Recruiting | Heidelberg | 69120 | Germany |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 25748465 | Result | Alsayed EZ, Hariri I, Sadr A, Nakashima S, Bakhsh TA, Shimada Y, Sumi Y, Tagami J. Optical coherence tomography for evaluation of enamel and protective coatings. Dent Mater J. 2015;34(1):98-107. doi: 10.4012/dmj.2014-215. | |
| 4544493 | Result | Levin SM. Portasystemic shunts for portal hypertension: early and late results in a personal series of 140 operations. Vasc Surg. 1974 Jan-Feb;8(1):20-5. No abstract available. |
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| ID | Term |
|---|---|
| D003731 | Dental Caries |
| D017001 | Tooth Demineralization |
| ID | Term |
|---|---|
| D014076 | Tooth Diseases |
| D009057 | Stomatognathic Diseases |
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| Protecto®CaF2Nano | Device | Application of • Protecto®CaF2Nano (orthodontic surface sealant) to labial surfaces of teeth of randomized quadrants. |
|
| Pro Seal® | Device | Application of • Protecto®CaF2Nano (orthodontic surface sealant) to labial surfaces of teeth of randomized quadrants. |
|
| Opal®Seal | Device | Application of • Opal®Seal (orthodontic surface sealant) to labial surfaces of teeth of randomized quadrants. |
|
| To assess cytokine levels GCF will be sampled at the day of bracket bonding prior (t0) and at three additional time points (t1= 30 min, t2= 60 min, t3= 90 min) after the application of surface sealants or the bonding primer, respectively. |
| 21228118 | Result | Ryf S, Flury S, Palaniappan S, Lussi A, van Meerbeek B, Zimmerli B. Enamel loss and adhesive remnants following bracket removal and various clean-up procedures in vitro. Eur J Orthod. 2012 Feb;34(1):25-32. doi: 10.1093/ejo/cjq128. Epub 2011 Jan 12. |
| 26168856 | Result | Lee SH, Lee JJ, Chung HJ, Park JT, Kim HJ. Dental optical coherence tomography: new potential diagnostic system for cracked-tooth syndrome. Surg Radiol Anat. 2016 Jan;38(1):49-54. doi: 10.1007/s00276-015-1514-8. Epub 2015 Jul 14. |
| 26312977 | Result | Leao Filho JC, Braz AK, de Araujo RE, Tanaka OM, Pithon MM. Enamel Quality after Debonding: Evaluation by Optical Coherence Tomography. Braz Dent J. 2015 Jul-Aug;26(4):384-9. doi: 10.1590/0103-6440201300406. |
| 26419674 | Result | Zingler S, Sommer A, Sen S, Saure D, Langer J, Guillon O, Lux CJ. Efficiency of powered systems for interproximal enamel reduction (IER) and enamel roughness before and after polishing-an in vitro study. Clin Oral Investig. 2016 Jun;20(5):933-42. doi: 10.1007/s00784-015-1585-2. Epub 2015 Sep 30. |
| 32789656 | Derived | Sen S, Erber R, Orhan G, Zingler S, Lux CJ. OCT evaluation of orthodontic surface sealants: a 12-month follow-up randomized clinical trial. Clin Oral Investig. 2021 Mar;25(3):1547-1558. doi: 10.1007/s00784-020-03462-7. Epub 2020 Aug 13. |
| 31765473 | Derived | Deurer N, Erber R, Orhan G, Zingler S, Lux CJ, Sen S. Abrasion of Pro Seal(R) and Opal(R) Seal by professional tooth cleaning protocols: results from an in vitro study and a randomized controlled trial. Eur J Orthod. 2020 Dec 2;42(6):596-604. doi: 10.1093/ejo/cjz096. |