Jan R. Johansen

Radiographic quantification of alveolar bone level changes

Jasim M. Albandar, Jostein Rise, Per Gjermo et al. · Journal Of Clinical Periodontology · 1986 · 112 citations

Dentistry, Oral Radiology, Radiology +16

Nitrous oxide fluxes in undisturbed riparian wetlands located in agricultural catchments: Emission, uptake and controlling factors

Joachim Audet, Carl Christian Hoffmann, Peter Mejlhede Andersen et al. · Soil Biology and Biochemistry · 2013 · 90 citations

Agriculture, Environmental Sciences, Hydrology +15

A system to classify the need for periodontal treatment

Jan R. Johansen, Per Gjermo, H. T. Bellini · Acta Odontologica Scandinavica · 1973 · 89 citations · Full text

Dentistry, Periodontics, Periodontology +17

Thiol groups and reduced acidogenicity of dental plaque in the presence of metal ions in vivo

Rui Vicente Oppermann, Jan R. Johansen, S. Assev · European Journal Of Oral Sciences · 1980 · 72 citations

Dentistry, Biochemistry, Oral Biology +11

Effect of 2‐years' use of chlorhexidine‐containing dentifrices on plaque, gingivitis, and caries

Jan R. Johansen, Per Gjermo, Harald M. Eriksen · European Journal Of Oral Sciences · 1975 · 63 citations

Dentistry, Oral Health Sciences, Dental Materials +7