Partner & Speakers

Just ask us.

Find out more from our implantology speakers and partner companies.


Dr. Dickl Ritter Implants Referent

Dr. (RO) Thorsten Dickel


I would be happy to assist the Ritter Company as a tutor to introduce newcomers to implant dentistry so that you can offer an additional exciting and very popular treatment option in the future.
Practicing dentistry since 1987
Focus training
⁃ Periodontology
⁃ Implantology
Private practice – own practice – from 1990-today.
Training assistant – Practice Dr. Seedorf, Zetel – 1987 – 1990 
Voluntary activities or management tasks
Practical activity as a dentist in the Zahnmobil Hannover.
Team member of the examination board for the granting of the license to practice dentistry for foreign graduates.
Since 1990 in private practice in Zetel, since 2009 in Hannover, now in a joint practice with Dr. J. Thiele, Theaterstrasse 15 in 30159 Hannover.
Tel.: +49(0)511 2157600,

Dr. Theranchian Sharam

Dr. Shahram Tehranchian

MSc.,MSc.,MSc.,MOM Implantologie

Oral surgeon
Master of Science in Implantology and Dental Surgery
Master in Periodontology
Master in Restorative and Aesthetic Dentistry
Master of Oral Medicine in Implantology

Tagesklinik Hannover Centrum, Karmarschstraße 33-35
30159 Hannover, Telefon: +49 (0) 511 16270892

Dr. David S. Han


Director, DHII 
Adj. Assist. Prof, OSU 
Diplomate, ABOI/ID 
Exocad, certified trainer 

The David Han Implant Institute
6035 Peachtree Road, Suite C-201, Atlanta
GA 30360 USA
Tel.: +1 770-624-3000

Dr. Han is a medical doctor, educator and engineer. He is certified by the American Board of Oral Implantology and is an affiliate of the American Academy of Implant Dentistry.

He was appointed Associate Assistant Professor in the Department of Restorative and Prosthodontic Dentistry by The Ohio State University and is actively involved in research projects.

He was also a clinical professor at Korea University and a visiting professor at Won Kwang University, where he lectured and conducted research projects.  He advised and assisted many implant companies such as Osstem (Hiossen), Neo and Dio in improving the quality and functionality of their products.  From 2006 to 2007, he trained the research and development team of Osstem. More than a hundred dentists have completed training with Dr. Han; he has also lectured internationally to more than a thousand dentists.

Dr. Han graduated from the University of Cincinnati with a degree in chemical engineering in 1988 (the UC College of Engineering invented the suspension bridge in the late 19th century). In 1992 and 2000, he earned both his DDS and Master of Science degrees from Ohio State University.

Dr. Han’s master’s degree in Advanced Dental Materials focused on implant research. When the program addressed tissue engineering, he learned about the potential benefits of PRP (Platelet-Rich Plasma).

Since 2000, he has introduced the PRP procedure and used it to improve and advance bone grafting techniques.  This phenomenally successful advancement has helped many dentists and their patients and is still taught by many physicians.

He participated in an oral implantology training program at Miami Valley Hospital. Currently, Dr. Han directs his own one-year training program at the David Han Implant Institute in the Atlanta area. His private practice is limited to oral implant dentistry.

He is a loving husband to his wife Yeonyee and father of five children.  His hobbies include short track ice skating, golfing, shooting competitions and hunting. He holds a second degree black belt in Tae Kwon Do.  He also enjoys outdoor adventures such as camping and hiking.

Our Partners

Follow thousands of interesting cases – get advice on difficult situations and seek advice from top-class international implantologists and colleagues! When you use the Ritter Natur Implant System, you are not just buying an implant system, you are becoming a member of a worldwide community – welcome to the Ritter family! Ask us for your personal coupon code T 07351. 52 925-66 or send us an e-Mail info(at)