Dr. Lechner is since 1980 head of Clinic for Integrative Dentistry/Munich as Dentist and Naturopath. Dr. Lechner published 19 scientific papers hitherto on Integrative Dentistry in PubMed indexed journals https://www.ncbi.nlm.nih.gov/pubmed/?term=Lechner+Johann which are accessed by thousands of dental and medical professionals worldwide. He published nine books in German on Integrative Medicine. In his seminars, he emphasizes clinical features of bone research, chronic inflammation and heavy metal load in the jawbone, and systemic interference. He is the founder of ICOSIM (International College of Maxillo-Mandibular Osteoimmunology www.icosim.de ) and developer of radiation-free measurement of bone density by ultrasonography CaviTAU® (www.cavitau.de ). He also brought the volatile sulfur indicator OroTox on root fillings (www.orotox.de) to control endodontic success to the market. Numerous lectures at international congresses, universities, and medical organizations (i.e. Boston, USA; London, UK; Sao Paulo, Brazil; Beijing and Shanghai, China.)