Literatur & Veröffentlichungen
Dr. Hisham Sabbagh

Biomechanical Simulation of Orthodontic En-Bloc Retraction Comparing Compound Technique and Sliding Mechanics Using a HOSEA Robotic Device

mpdi
2024-02-02 | Journal article
CONTRIBUTORS: Hisham Sabbagh, Ellen Haas, Uwe Baumert, Corinna Lesley Seidel, Linus Hötzel and Andrea Wichelhaus

Contributors

Hisham Sabbagh, Ellen Haas, Uwe Baumert, Corinna Lesley Seidel, Linus Hötzel and Andrea Wichelhaus

 

Comparing Torque Transmission of Different Bracket Systems in Combination with Various Archwires Considering Play in the Bracket Slot: An In Vitro Study

mpdi
2024-01-31 | Journal article
CONTRIBUTORS: Andrea Wichelhaus, Simon Guggenbühl , Linus Hötzel, Corinna L. Seidel, Hisham Sabbagh and Lea Hoffmann

Contributors

Andrea Wichelhaus, Simon Guggenbühl , Linus Hötzel, Corinna L. Seidel, Hisham Sabbagh and Lea Hoffmann

 

Load Deflection Characteristics of Orthodontic Gummetal® Wires in Comparison with Nickel–Titanium Wires: An In Vitro Study

mpdi
2024-01-22 | Journal article
CONTRIBUTORS: Hisham Sabbagh, Mila Janjic Rankovic, Daniel Martin, Matthias Mertmann, Linus Hötzel and Andrea Wichelhaus

Contributors

Hisham Sabbagh, Mila Janjic Rankovic, Daniel Martin, Matthias Mertmann, Linus Hötzel and Andrea Wichelhaus

 

Troubleshooting in Orthodontics: Strategies for Overcoming Limitations in Orthodontics.

Thieme E-Journals
2023-10-05 | Journal article
CONTRIBUTORS: Aladin Sabbagh , Hisham Sabbagh

Troubleshooting in der Kieferorthopädie. Strategien zur Überwindung von Limitationen in der Kieferorthopädie.

Thieme E-Journals
2023-12-21 | Journal article
CONTRIBUTORS: Aladin Sabbagh , Hisham Sabbagh

Accuracy of maxillary positioning using computer-designed and manufactured occlusal splints or patient-specific implants in orthognathic surgery

SpringerNature
2023-06-29 | Journal article
CONTRIBUTORS: Yoana Malenova, Florian Ortner, Paris Liokatis, Selgai Haidari, Matthias Tröltzsch, Florian Fegg, Katharina T. Obermeier, Jens T. Hartung, Tamara K. Kakoschke, Egon Burian, Sven Otto, Hisham Sabbagh & Florian A. Probst

Contributors

Yoana Malenova, Florian Ortner, Paris Liokatis, Selgai Haidari, Matthias Tröltzsch, Florian Fegg, Katharina T. Obermeier, Jens T. Hartung, Tamara K. Kakoschke, Egon Burian, Sven Otto, Hisham Sabbagh & Florian A. Probst

 

Biomechanical simulation of forces and moments of initial orthodontic tooth movement in dependence on the used archwire system by ROSS (Robot Orthodontic Measurement & Simulation System)

ScienceDirect
2023-08-23 | Journal article
CONTRIBUTORS: Benedikt Dotzer , Thomas Stocker , Andrea Wichelhaus , Mila Janjic Rankovic , Hisham Sabbagh

Contributors

Benedikt Dotzer , Thomas Stocker , Andrea Wichelhaus , Mila Janjic Rankovic , Hisham Sabbagh

 

Investigation of Forces and Moments during Orthodontic Tooth Intrusion Using Robot Orthodontic Measurement and Simulation System (ROSS)

Bioengineering 2023
2023-11-25 | Journal article
CONTRIBUTORS: Corinna L. Seidel, Julian Lipp, Benedikt Dotzer, Mila Janjic Rankovic, Matthias Mertmann, Andrea Wichelhaus and Hisham Sabbagh

Contributors

Corinna L. Seidel, Julian Lipp, Benedikt Dotzer, Mila Janjic Rankovic, Matthias Mertmann, Andrea Wichelhaus and Hisham Sabbagh

 

Patients’ perceptions on temporomandibular disorder treatment with hydrostatic oral splints - a pilot study

BDJ Open
2022-02-05 | Journal article
CONTRIBUTORS: H. Sabbagh, A. Sabbagh, A. Heppner, C. Auer, A. Wichelhaus, L. Hoffmann

Contributors

H. Sabbagh, A. Sabbagh, A. Heppner, C. Auer, A. Wichelhaus, L. Hoffmann

 

Force-Controlled Biomechanical Simulation of Orthodontic Tooth Movement with Torque Archwires Using HOSEA (Hexapod for Orthodontic Simulation, Evaluation and Analysis)

Bioengineering
2023-09-07 | Journal article
CONTRIBUTORS: Ellen Haas, Andreas Schmid, Thomas Stocker, Andrea Wichelhaus und Hisham Sabbagh*

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URL

https://www.mdpi.com/2306-5354/10/9/1055

Contributors

Ellen Haas, Andreas Schmid, Thomas Stocker, Andrea Wichelhaus und Hisham Sabbagh*

 

Influence of growth structures and fixed appliances on automated cephalometric landmark recognition with a customized convolutional neural network

BMC Oral Health
2023-05-10 | Journal article
CONTRIBUTORS: Teodora Popova1, Thomas Stocker1, Yeganeh Khazaei2, Yoana Malenova3, Andrea Wichelhaus1 and Hisham Sabbagh1*

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Contributors

Teodora Popova1, Thomas Stocker, Yeganeh Khazaei, Yoana Malenova, Andrea Wichelhaus and Hisham Sabbagh

 

Thermal Programming of Commercially Available Orthodontic NiTi Archwires

MDPI materials
2023-05-11 | Journal article
CONTRIBUTORS: Wichelhaus, A.Mehnert, A.Stocker, T.;Baumert, U.; Mertmann, M.; Sabbagh, H.; Seidel, C.L.

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Contributors

Wichelhaus, A.Mehnert, A.Stocker, T.;Baumert, U.; Mertmann, M.; Sabbagh, H.; Seidel, C.L.

Thermal Programming of Commercially Available Orthodontic NiTi

 

SARA-Splints – Sabbagh Advanced Repositioning Appliance

Kieferorthopädische „PERLE“ 2020
CONTRIBUTORS: Hisham Sabbagh · Aladin Sabbagh 

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Contributors

Hisham Sabbagh 

Aladin Sabbagh 

 

Hybride Kieferorthopädie

Kieferorthopädische Interessengemeinschaft – KFO IG 
2022 
CONTRIBUTORS: Hisham Sabbagh · Aladin Sabbagh 

Contributors

Hisham Sabbagh 

Aladin Sabbagh 

 

Hybride Kieferorthopädie

Kieferorthopädische Interessengemeinschaft – KFO IG 
2022 
CONTRIBUTORS: Hisham Sabbagh · Aladin Sabbagh 

Contributors

Hisham Sabbagh 

Aladin Sabbagh 

 

Influence of the force magnitude of fixed functional appliances for class II subdivision 1 treatment—a cephalometric study

J Orofac Orthop
2023-01-08 | Journal article
CONTRIBUTORS: Hisham Sabbagh · Aladin Sabbagh · Mila Janjic Rankovic · Christine Huber · Andrea Wichelhaus · Lea Hofmann

Contributors

Hisham Sabbagh 

Aladin Sabbagh 

Mila Janjic Rankovic

Christine Huber 

Andrea Wichelhaus

Lea Hofmann

Added

2023-01-08

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Force behaviour of elastic chains during a simulated gap closure in extraction therapy cases

Orthodontics & Craniofacial Research
2022-12-26 | Journal article
CONTRIBUTORS: Hisham Sabbagh; Elias P. Bamidis; Alexander Keller; Thomas Stocker; Uwe Baumert; Lea Hoffmann; Andrea Wichelhaus

Contributors

Hisham Sabbagh (Author)

Elias P. Bamidis (Author)

Alexander Keller (Author)

Thomas Stocker (Author)

Uwe Baumert (Author)

Lea Hoffmann (Author)

Andrea Wichelhaus (Author)

Added

2022-12-12

Last modified

2022-12-27

Functional Orthodontic Treatment of Mandibular Condyle Fractures in Children and Adolescent Patients: An MRI Follow-Up

Life
2022-10-13 | Journal article
CONTRIBUTORS: Hisham Sabbagh; Trayana Nikolova; Sara Carina Kakoschke; Andrea Wichelhaus; Tamara Katharina Kakoschke

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Contributors

 

Hisham Sabbagh (Author)

Trayana Nikolova (Author)

Sara Carina Kakoschke (Author)

Andrea Wichelhaus (Author)

Tamara Katharina Kakoschke (Author)

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2022-10-14

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2022-10-14
 

Dental management before radiotherapy of the head and neck region: 4‐year single‐center experience

Clinical and Experimental Dental Research
2022-09-11 | Journal article
Part of ISSN: 2057-4347
Part of ISSN: 2057-4347
CONTRIBUTORS: Hisham Sabbagh

Language

English

Contributors

Hisham Sabbagh (0000-0002-9535-6901)

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2022-09-12

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2022-09-12

Accuracy of 3D Tooth Movements in the Fabrication of Manual Setup Models for Aligner Therapy

Materials
2022-05-28 | Journal article
CONTRIBUTORS: Hisham Sabbagh; Sebastian Marcus Heger; Thomas Stocker; Uwe Baumert; Andrea Wichelhaus; Lea Hoffmann

Contributors

Hisham Sabbagh (Author)

Sebastian Marcus Heger (Author)

Thomas Stocker (Author)

Uwe Baumert (Author)

Andrea Wichelhaus (Author)

Lea Hoffmann (Author)

Added

2022-05-29

Last modified

2022-06-07

Bracket Transfer Accuracy with the Indirect Bonding Technique—A Systematic Review and Meta-Analysis

Journal of Clinical Medicine
2022-05-04 | Journal article
CONTRIBUTORS: Hisham Sabbagh; Yeganeh Khazaei; Uwe Baumert; Lea Hoffmann; Andrea Wichelhaus; Mila Janjic Rankovic

Contributors

Hisham Sabbagh (Author)

Yeganeh Khazaei (Author)

Uwe Baumert (Author)

Lea Hoffmann (Author)

Andrea Wichelhaus (Author)

Mila Janjic Rankovic (Author)

Added

2022-05-04

Last modified

2022-06-07

Influence of normal forces on the frictional behavior in tribological systems made of different bracket types and wire dimensions.

Dental materials journal
2022-04-01 | Journal article
PMID: 35370257

Description

The aim of the present work was measuring the effect of varying normal forces on frictional forces applied to different bracket types in combination with archwires made of NiTi and stainless steel of variable cross section. The measurements were carried out in artificial saliva. Three-way ANOVA and Bonferroni post-hoc tests (α=0.05) were applied. Except for one subgroup the combination of normal force, bracket system and wire dimension had significant effect on friction (p<0.001) as friction increased with increasing normal forces. Only moderately tied ligatures or passive self-ligating brackets generate low friction forces. There was a statistically significant order (0.016″×0.022″<0.018″×0.025″<0.019″×0.025″) for stainless steel wire material. Finite element modeling simulation showed the increasing effect of active clip force on friction especially for 0.025″ wire profiles. If compared to NiTi wires, stainless steel archwires delivered higher friction. Combinations between wire-type and ligation should be chosen carefully for the intended treatment step.

Added

2022-04-07

Last modified

2022-04-07

Patients’ perceptions on temporomandibular disorder treatment with hydrostatic oral splints - a pilot study

BDJ Open
2022-02-05 | Journal article
CONTRIBUTORS: H. Sabbagh; A. Sabbagh; A. Heppner; C. Auer; A. Wichelhaus; L. Hoffmann

Contributors

H. Sabbagh (Author)

A. Sabbagh (Author)

A. Heppner (Author)

C. Auer (Author)

A. Wichelhaus (Author)

L. Hoffmann (Author)

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2022-02-05

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2022-11-23

Bracket transfer accuracy with two different three-dimensional printed transfer trays vs silicone transfer trays.

The Angle orthodontist
2022-01-04 | Journal article
PMID: 34982114

Description

Objectives
To compare the transfer accuracy of two different three-dimensional printed trays (Dreve FotoDent ITB [Dreve Dentamid, Unna, Germany] and NextDent Ortho ITB [NextDent, Soesterberg, the Netherlands]) to polyvinyl siloxane (PVS) trays for indirect bonding.
Materials and methods
A total of 10 dental models were constructed for each investigated material. Virtual bracket placement was performed on a scanned dental model using OnyxCeph (OnyxCeph 3D Lab, Chemnitz, Germany). Three-dimensional printed transfer trays using a digital light processing system three-dimensional printer and silicone transfer trays were produced. Bracket positions were scanned after the indirect bonding procedure. Linear and angular transfer errors were measured. Significant differences between mean transfer errors and frequency of clinically acceptable errors (<0.25 mm/1°) were analyzed using the Kruskal-Wallis and χ2 tests, respectively.
Results
All trays showed comparable accuracy of bracket placement. NextDent exhibited a significantly higher frequency of rotational error within the limit of 1° (P = .01) compared with the PVS tray. Although PVS showed significant differences between the tooth groups in all linear dimensions, Dreve exhibited a significant difference in the buccolingual direction only. All groups showed a similar distribution of directional bias.
Conclusions
Three-dimensional printed trays achieved comparable results with the PVS trays in terms of bracket positioning accuracy. NextDent appears to be inferior compared with PVS regarding the frequency of clinically acceptable errors, whereas Dreve was found to be equal. The influence of tooth groups on the accuracy of bracket positioning may be reduced by using an appropriate three-dimensional printed transfer tray (Dreve).

Added

2022-01-10

Last modified

2022-01-10

Clinical effects with customized brackets and CAD/CAM technology: a prospective controlled study

Progress in Orthodontics
2021-12 | Journal article
Part of ISSN: 2196-1042

Language

English

Citation (bibtex)

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Description

Objective
Nowadays, CAD/CAM technologies enrich orthodontics in several ways. While they are commonly used for diagnoses and treatment planning, they can also be applied to create individualized bracket systems. The purpose of this prospective quasi-randomized study was to evaluate the clinical efficiency of a customized bracket system and its comparison with directly bonded conventional self-ligating bracket treatment.
Materials and methods
Altogether 38 patients were separated into two groups, treated either with direct bonded self-ligating brackets (Damon, Ormco, USA) or with indirect bonded customized CAD/CAM brackets (Insignia™, Ormco, USA). Overall treatment time, number of treatment appointments, number of lost or repositioned brackets, number of arch wires and wire bends, Little Irregularity Index, cephalometric analyses and ABO scores were compared. Superimpositions of the virtual set-ups and the treatment results of the CAD/CAM group were performed to evaluate the clinical realization of the treatment planning.
Results
No differences between both treatment groups were found concerning overall treatment time, number of appointments and number of archwire bends. Bonding failures occurred more often using the CAD/CAM system. Indirectly bonded brackets did not have to be repositioned as often as directly bonded brackets. Treatment results with both systems were similar concerning their effects on the reduction of ABO scores. The number of used archwires was higher in the CAD/CAM group. Treatment with both systems led to further proclination of the incisors. Proclination in the lower jaw was greater than proclination in the upper jaw, and there was a statistically significant difference between the two treatment systems. Comparing the treatment results with the virtual set-ups, mesial positions were met best, followed by vertical positions. Transversal positions showed the greatest discrepancies. Concerning angles, values of angulation showed greatest accordance to the virtual set-up, while values of inclinations showed greatest discrepancies.
Conclusion
In comparison with a direct bonded self-ligating bracket system the use of indirect bonded customized CAD/CAM brackets showed only minor influence on treatment efficiency and treatment outcomes. Transversal expansion, deep bite correction, expression of torque and anchorage loss remain challenges in the treatment with straight-wire appliances.
Trial registration DRKS, DRKS00024350. Registered 15 February 2021
 

Added

2021-12-07

Last modified

2021-12-07

Effect of different media on frictional forces between tribological systems made from self-ligating brackets in combination with different stainless steel wire dimensions.

Dental materials journal
2021-06-30 | Journal article
PMID: 34193727

Description

The purpose was to determine the effect of different environments (artificial saliva, human saliva, distilled water, dry storage) on frictional forces between various tribological systems made from self-ligating brackets in combination with stainless-steel wires (dimensions: 0.016″×0.022″, 0.018″×0.025″ and 0.019″×0.025″). An universal testing-machine applied a normal force of 1 N. Two-way ANOVA and Tukey post-hoc tests (α=5%) were used. Saliva had significantly higher frictional forces (p<0.001). Yet, the influence of the media depends on the wire dimensions. The results were not as straightforward as in 0.018″×0.025″, which had a clear order (dry storage<water<artificial saliva<human saliva, p<0.001 each). Except for human saliva, wire dimensions differed significantly from each other (p<0.001). Increasing wire cross-sections increases frictional force. Thus, saliva acts as adhesive. High frictional forces of larger wires are attributed to the contact between latch and wire. Still, in-vitro experiments can only approximate the quasi-static tooth movement and the various fluids in the mouth.

Added

2021-07-08

Last modified

2021-07-08

Stainless steel and NiTi torque archwires and apical root resorption.

Journal of orofacial orthopedics = Fortschritte der Kieferorthopadie : Organ/official journal Deutsche Gesellschaft fur Kieferorthopadie
2020-09-01 | Journal article
PMID: 32875350

Description

Objective
The amount of apical root resorption when using the torque-segmented archwire (TSA) was investigated as well as the extent and direction of the therapeutically indicated apical movement and the treatment duration.
Materials and methods
The degree of apical root resorption in 18 randomly chosen Class II and Class I patients treated with the TSA, as well as in 18 conventionally treated patients were evaluated using pre- and posttreatment panoramic radiographs. The sagittal and vertical apical movements and inclination changes were determined based on pre- and posttreatment lateral cephalograms. Nonparametric tests were applied to test between treatment groups and steps. The Mann-Whitney U test, Kruskal-Wallis, Pearson correlation and Wilcoxon signed-rank test were applied for statistical analysis (p < 0.05).
Results
The incidence of root resorptions was 89-94.4% in low or moderate level. The relative root-crown ratio (rRCR) was not statistically different between the TSA and control groups except tooth 12. The axis of the incisors in the TSA group was significantly improved. The main direction of movement of the apices of the central incisors was retrusion and extrusion. No interdependence between the amount of resorption and the parameters of treatment duration, extent and direction of apical movement were found.<
Conclusion
The results of the study showed that the amount of apical root resorption with the TSA is slight to moderate and can be compared to conventional orthodontic treatment. The TSA is hence a suitable method for applying targeted torques to the incisors.

Added

2021-02-05

Last modified

2021-02-05