Sven Scharf
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Sven Scharf has a total of 17 co-authors. Here are the top co-authors by number of shared publications:
- Andreas Jäger
München, Deutschland
1 shared publication Bert Braumann
Department of Orthodontics, University Hospital of Cologne, Kerpener Straße 32, 50931, Cologne, Germany
1 shared publication- Bert Braumann
Department of Orthodontics, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
1 shared publication - Christina Plötz
Department of Orthodontics, University Hospital Bonn, Welschnonnenstraße 17, 53111, Bonn, Germany
1 shared publication - Christine Fuhrmann
Clinical Study Core Unit, Study Center Bonn (SZB), University of Bonn, Sigmund-Freud-Str. 25, 53127 Bonn, Germany
1 shared publication Christoph Bourauel
Department of Oral Technology, University of Bonn, Welschnonnenstraße 17, 53111, Bonn, Germany
1 shared publication
Latest Publications
- 13 December 2019
- Published by Springer Nature in Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie
- Vol. 81 (1) , 30-40
Influence of attachment bonding protocol on precision of the attachment in aligner treatments
Aim Precise bonding of attachments in aligner treatment is crucial to achieve the intended tooth movement. Thus, we evaluated five different bonding protocols for attachments used in aligner treatments with the goal of identifying the most precise protocol. Methods One ellipsoid and one rectangular attachment were exemplarily chosen and examined. All attachments were bonded using the same template aligner, which was produced by thermoforming. The bonding process was repeated 30 times with each protocol for statistical analysis. The protocols differed in the type of composite used (high viscous, low viscous), the additional application of a perforation in the attachment reservoir, and the use of a two-phase procedure with high viscous composite. All bonded attachments were laser scanned and compared to the attachments of a master model using a surface/surface matching algorithm to determine the precision, i.e., highest aberrations (maximum vertical distance) between the attachment of the master and results obtained from the various bonding protocols. Furthermore, the excessive amounts of composite bonded around the attachments were measured and compared. Results The two-phase procedure had a median aberration of 0.13 mm and a median amount of excessive composite of 7.40 mm2 (ellipsoid attachment). With the low viscous composite without a perforation in the template reservoir, similar results were achieved (median 0.13 mm) regarding the maximum vertical distance, but had an excess area of 33.50 mm2. Conclusion In this in vitro study, the bonding protocol influenced the precision of bonded attachments. The bonding protocol with high viscous composite without a perforation in the attachment reservoir was the most inaccurate. The use of a low viscous composite or attachments made by a two-phase procedure with high viscous composite revealed more precise results.
- 13 December 2019
- Published by Springer Nature in Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie
- Vol. 81 (1) , 30-40
Influence of attachment bonding protocol on precision of the attachment in aligner treatments
Aim Precise bonding of attachments in aligner treatment is crucial to achieve the intended tooth movement. Thus, we evaluated five different bonding protocols for attachments used in aligner treatments with the goal of identifying the most precise protocol. Methods One ellipsoid and one rectangular attachment were exemplarily chosen and examined. All attachments were bonded using the same template aligner, which was produced by thermoforming. The bonding process was repeated 30 times with each protocol for statistical analysis. The protocols differed in the type of composite used (high viscous, low viscous), the additional application of a perforation in the attachment reservoir, and the use of a two-phase procedure with high viscous composite. All bonded attachments were laser scanned and compared to the attachments of a master model using a surface/surface matching algorithm to determine the precision, i.e., highest aberrations (maximum vertical distance) between the attachment of the master and results obtained from the various bonding protocols. Furthermore, the excessive amounts of composite bonded around the attachments were measured and compared. Results The two-phase procedure had a median aberration of 0.13 mm and a median amount of excessive composite of 7.40 mm2 (ellipsoid attachment). With the low viscous composite without a perforation in the template reservoir, similar results were achieved (median 0.13 mm) regarding the maximum vertical distance, but had an excess area of 33.50 mm2. Conclusion In this in vitro study, the bonding protocol influenced the precision of bonded attachments. The bonding protocol with high viscous composite without a perforation in the attachment reservoir was the most inaccurate. The use of a low viscous composite or attachments made by a two-phase procedure with high viscous composite revealed more precise results.
- Open Access
- 1 January 2013
- Published by Springer Nature in Trials
- Vol. 14 (1) , 108
Influence of time after extraction on the development of gingival invagination: study protocol for a multicenter pilot randomized controlled clinical trial
Gingival invaginations are a common side effect of orthodontic therapy involving tooth extraction and subsequent space closure. Consequences of gingival invaginations are a jeopardized stability of the space closure and hampered oral hygiene. In a retrospective study, the factor time until initiation of orthodontic space closure after tooth extraction has been identified as a potential risk factor for the development of gingival invaginations. The aim of this pilot study is to proof this hypothesis and to enable a caseload calculation for further clinical trials. The referring question is: is it possible to reduce the number of developing gingival invaginations by initiation of orthodontic space closure after tooth extraction at an early point of time?
- 1 January 2013
- Published by Springer Nature in Trials
- Vol. 14 (1) , 108
Open AccessInfluence of time after extraction on the development of gingival invagination: study protocol for a multicenter pilot randomized controlled clinical trial
Gingival invaginations are a common side effect of orthodontic therapy involving tooth extraction and subsequent space closure. Consequences of gingival invaginations are a jeopardized stability of the space closure and hampered oral hygiene. In a retrospective study, the factor time until initiation of orthodontic space closure after tooth extraction has been identified as a potential risk factor for the development of gingival invaginations. The aim of this pilot study is to proof this hypothesis and to enable a caseload calculation for further clinical trials. The referring question is: is it possible to reduce the number of developing gingival invaginations by initiation of orthodontic space closure after tooth extraction at an early point of time?