Since 1973, the following main areas of research of the Clinic for Orthodontics have to be mentioned


Clinical and radiographic studies on the etiology, indication, therapy and prognosis of retarded teeth of the second dentition. The physiological and pathological deciduous root absorption and its consequences. The technique of manufacturing and clinical application of plate apparatus. Orofacial dyskinesia. Interdisciplinary cooperation between oral surgeons and orthodontists.

A focus of research since 2002 is the investigation of the influence of different surgical techniques and a postoperative orthodontic fine tuning on the results of the transplantation of third molar bacteria and the functional results after tooth transplantation.


Other priorities are:


Example of current clinical research

Currently, interdisciplinary clinical issues are being dealt with. Here is a project to develop a device for measuring the transmission of the torque of lingual bracket systems on teeth:


In orthodontics, teeth can be moved three-dimensionally on their bony bases using fixed appliances. This harmonization of the tooth position in the upper and lower jaw and a harmonization of the dental arches to each other is possible. Fixed appliances can be attached to the outside of teeth or on the inside of teeth. In the further development of prefabricated lingual bracket systems, an individual lingual bracket system was designed (type "Incognito" according to Wiechmann). This is based in particular on the digital recording of the therapeutic target state, the individual virtual design and positioning of the brackets on the computer and the manufacture of the individual brackets using modern CAD / CAM technology. The corresponding orthodontic arches are manufactured individually with a bending robot. By applying this new technology, it is possible to produce and use individual, flatter and significantly smaller brackets compared to assembled systems.


The achievement of the desired position of the individual teeth on the respective jaw depends on the precision of the equipment used. In the interplay of brackets with the orthodontic arch connecting them, the desired tooth position is transferred from the planning via the apparatus to the patient. This applies in particular to the tooth position in the oro-vestibular direction, the torque.


The aim of the present study was to develop a special measuring device and the torque transfer of orthodontic arches in the brackets of the newly developed "Incognito" individual lingual bracket system with the help of a special newly developed ligature ("Power Tie") in vitro to compare with other already known ligatures and thus to make statements on the precision of the effectiveness of the new bracket system. A comparative study on torque transmission was performed: The following variants were selected for the attachment of orthodontic arches in bracket slots: "Without ligature", with "O-ring", with "Double Over-Tie" and with "Power-Tie ". The measurements were carried out in vitro on anterior teeth.


The findings indicate that the application of the newly developed "power-Ties" Torque in the examined individual lingual apparatus is transmitted much more precisely than with other fasteners and thus the desired tooth position during treatment can be achieved more accurately.


The aim of the Clinic for Orthodontics in Research is to work on questions of basic research in the coming years. Therefore, a joint research area of ​​the Center for Dental, Oral and Maxillofacial Surgery is under construction. Here, a cooperation with all clinics of the Center of Dental, Oral and Maxillofacial Surgery and Hospitals and Institutes of Medicine as well as other facilities of the scientific location of Hannover and the surrounding area with a cell and molecular biology orientation.



Example of current basic research

One research focus is an interdisciplinary project on the question of the colonization of orthodontic treatment apparatus with microorganisms (so-called "biofilm") and the development of new orthodontic materials with anti-adhesive coating.


Furthermore, a project "cell regeneration" with cellular and molecular-biological investigations on bone replacement in the sense of a cell-based regenerative medicine (especially in cleft lip and palate and when teeth move into the cleft area) is part of the project.


Other focal points of research are currently the topics "Biomaterials" and "3D Imaging". The individual research groups cooperate with the Universities of Bonn, Zurich, Paris V, Paris VII and Beijing. Within the framework of research and teaching, Mr. Priv.-Doz. Dr. YES. Lisson and in 2005 Mr. Priv.-Doz. Dr. Dr. O. Successfully completed the habilitation procedure and received the Venia legendi.


Third-party funds and cooperations


The mentioned projects are supported by the German Society for Lingual Orthodontics, private donors, industry and the state of Lower Saxony. An application for the promotion of osteology research by the Deutsche Forschungsgemeinschaft is in preparation. In the past few years, the clinic has been receiving a six-digit sum of money from third-party funds and tuition fees each year.