Ingar Olsen

20.3k total citations · 7 hit papers
287 papers, 15.5k citations indexed

About

Ingar Olsen is a scholar working on Periodontics, Molecular Biology and Public Health, Environmental and Occupational Health. According to data from OpenAlex, Ingar Olsen has authored 287 papers receiving a total of 15.5k indexed citations (citations by other indexed papers that have themselves been cited), including 169 papers in Periodontics, 85 papers in Molecular Biology and 57 papers in Public Health, Environmental and Occupational Health. Recurrent topics in Ingar Olsen's work include Oral microbiology and periodontitis research (158 papers), Oral Health Pathology and Treatment (44 papers) and Genomics and Phylogenetic Studies (38 papers). Ingar Olsen is often cited by papers focused on Oral microbiology and periodontitis research (158 papers), Oral Health Pathology and Treatment (44 papers) and Genomics and Phylogenetic Studies (38 papers). Ingar Olsen collaborates with scholars based in Norway, United States and Sweden. Ingar Olsen's co-authors include Bruce J. Paster, Floyd E. Dewhirst, A. Jørn, Leif Tronstad, Sim K. Singhrao, Kristin M. Kolltveit, Ilia Brondz, Xiangyang Li, Gilberto Debelian and Xiaojing Li and has published in prestigious journals such as PLoS ONE, Applied and Environmental Microbiology and Clinical Microbiology Reviews.

In The Last Decade

Ingar Olsen

280 papers receiving 14.6k citations

Hit Papers

align trajectories sort by overperformance

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Defining the Normal Bacterial Flora of the Oral Cavity

2005 2.3k citations A. Jørn, Bruce J. Paster et al. Journal of Clinical Microbiology profile →
Systemic Diseases Caused by Oral Infection

2000 776 citations Kristin M. Kolltveit, Leif Tronstad et al. Clinical Microbiology Reviews profile →
Bacteria of Dental Caries in Primary and Permanent Teeth in Children and Young Adults

2008 708 citations A. Jørn, Ann L. Griffen et al. Journal of Clinical Microbiology profile →
The breadth of bacterial diversity in the human periodontal pocket and other oral sites

2006 654 citations Bruce J. Paster, Ingar Olsen et al. profile →
Systemic Diseases Caused by Oral Infection

2000 605 citations Xiaojing Li, Kristin M. Kolltveit et al. Clinical Microbiology Reviews profile →
Biofilm-specific antibiotic tolerance and resistance

2015 563 citations Ingar Olsen profile →
Can oral bacteria affect the microbiome of the gut?

2019 233 citations Ingar Olsen et al. Journal of Oral Microbiology profile →

Author Peers

Peers are selected by citation overlap in the author's most active subfields. citations · hero ref

Author						Papers	Cites
Ingar Olsen	8.6k	4.0k	2.9k	2.5k	2.0k	287	15.5k
William G. Wade	6.9k 0.8×	4.1k 1.0×	2.2k 0.7×	1.6k 0.6×	1.7k 0.9×	177	13.8k
Philip D. Marsh	7.7k 0.9×	3.3k 0.8×	1.8k 0.6×	1.6k 0.6×	1.9k 1.0×	191	13.6k
A. C. R. Tanner	8.7k 1.0×	2.5k 0.6×	3.1k 1.1×	2.0k 0.8×	1.6k 0.8×	115	12.0k
Richard J. Lamont	12.8k 1.5×	6.5k 1.6×	5.3k 1.8×	1.4k 0.6×	1.9k 1.0×	260	18.7k
Eric C. Reynolds	9.9k 1.2×	6.2k 1.6×	2.6k 0.9×	2.7k 1.1×	1.6k 0.8×	411	21.4k
Paul E. Kolenbrander	6.7k 0.8×	4.6k 1.2×	2.7k 0.9×	1.4k 0.5×	1.1k 0.6×	110	11.0k
George Hajishengallis	14.7k 1.7×	6.5k 1.6×	5.0k 1.7×	1.4k 0.6×	3.5k 1.8×	230	28.5k
Walter J. Loesche	12.2k 1.4×	2.3k 0.6×	4.3k 1.5×	3.7k 1.5×	2.6k 1.4×	186	17.5k
Hyun Koo	8.2k 1.0×	6.4k 1.6×	1.7k 0.6×	1.6k 0.6×	1.0k 0.5×	189	18.5k
R.J. Gibbons	7.1k 0.8×	2.8k 0.7×	3.2k 1.1×	1.4k 0.6×	2.4k 1.2×	145	12.2k

Countries citing papers authored by Ingar Olsen

Since Specialization

Citations

This map shows the geographic impact of Ingar Olsen's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Ingar Olsen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ingar Olsen more than expected).

Fields of papers citing papers by Ingar Olsen

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ingar Olsen. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Ingar Olsen. The network helps show where Ingar Olsen may publish in the future.

Co-authorship network of co-authors of Ingar Olsen

This figure shows the co-authorship network connecting the top 25 collaborators of Ingar Olsen. A scholar is included among the top collaborators of Ingar Olsen based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Ingar Olsen. Ingar Olsen is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Olsen, Ingar. (2021). Porphyromonas Gingivalis May Seek the Alzheimer’s Disease Brain to Acquire Iron from Its Surplus. Journal of Alzheimer s Disease Reports. 5(1). 79–86. 8 indexed citations

Olsen, Ingar. (2021). Can Porphyromonas gingivalis Contribute to Alzheimer’s Disease Already at the Stage of Gingivitis?. Journal of Alzheimer s Disease Reports. 5(1). 237–241. 6 indexed citations

Siddiqui, Huma, et al.. (2019). High Throughput Sequencing Detects Gingivitis and Periodontal Oral Bacteria in Alzheimer's Disease Autopsy Brains. Journal of Neuroscience Research. 1(1). 3. 8 indexed citations

Chen, Tsute & Ingar Olsen. (2019). Porphyromonas gingivalis and its CRISPR-Cas system. Journal of Oral Microbiology. 11(1). 1638196–1638196. 18 indexed citations

Olsen, Ingar, Sim K. Singhrao, & Jan Potempa. (2018). Citrullination as a plausible link to periodontitis, rheumatoid arthritis, atherosclerosis and Alzheimer’s disease. Journal of Oral Microbiology. 10(1). 1487742–1487742. 73 indexed citations

Singhrao, Sim K. & Ingar Olsen. (2018). Are Porphyromonas gingivalis Outer Membrane Vesicles Microbullets for Sporadic Alzheimer’s Disease Manifestation?. Journal of Alzheimer s Disease Reports. 2(1). 219–228. 63 indexed citations

Holmstrup, Palle, Ingar Olsen, Björn Klinge, et al.. (2017). Komorbiditet ved marginal parodontitis: To sider af sammesag?. Den Norske tannlegeforenings tidende. 127(1). 20–9.

Skovbjerg, Susann, Anna Martner, Lars Hynsjö, et al.. (2009). Gram-Positive and Gram-Negative Bacteria Induce Different Patterns of Cytokine Production in Human Mononuclear Cells Irrespective of Taxonomic Relatedness. Journal of Interferon & Cytokine Research. 30(1). 23–32. 56 indexed citations

Jørn, A., Ann L. Griffen, Alice Lee, et al.. (2008). Bacteria of Dental Caries in Primary and Permanent Teeth in Children and Young Adults. Journal of Clinical Microbiology. 46(4). 1407–1417. 708 indexed citations breakdown →

10.

Lund, May Brit, et al.. (2008). Severe chronic obstructive pulmonary disease: Association with marginal bone loss in periodontitis. Respiratory Medicine. 102(4). 488–494. 71 indexed citations

11.

Caugant, Dominique A., Emenike Ribs K. Eribe, A. Jørn, et al.. (2006). Bacterial diversity in aortic aneurysms determined by 16S ribosomal RNA gene analysis. Journal of Vascular Surgery. 44(5). 1055–1060. 81 indexed citations

12.

Eribe, Emenike Ribs K., Tor Hofstad, & Ingar Olsen. (2002). Enzymatic/Biochemical and Cellular Fatty Acid Analyses of Leptotrichia Isolates. Microbial Ecology in Health and Disease. 14(3). 137–148. 4 indexed citations

13.

Li, Xiaojing, Kristin M. Kolltveit, Leif Tronstad, & Ingar Olsen. (2000). Systemic Diseases Caused by Oral Infection. Clinical Microbiology Reviews. 13(4). 547–558. 605 indexed citations breakdown →

14.

Tronstad, Leif, et al.. (1999). Brain abscesses caused by oral infection. Dental Traumatology. 15(3). 95–101. 61 indexed citations

15.

Debelian, Gilberto, Ingar Olsen, & Leif Tronstad. (1994). Systemic diseases caused by oral microorganisms. Dental Traumatology. 10(2). 57–65. 71 indexed citations

16.

Kerekes, Kasmer & Ingar Olsen. (1990). Similarities in the microfloras of root canals and deep periodontal pockets. Dental Traumatology. 6(1). 1–5. 51 indexed citations

17.

Låg, Marit, Kristen Helgeland, Ingar Olsen, & Jon Jonsen. (1986). Effects of cadmium acetate and sodium selenite on mucociliary functions and adenosine triphosphate content in mouse trachea organ cultures. Toxicology. 39(3). 323–332. 8 indexed citations

18.

Olsen, Ingar & Jon Jonsen. (1979). Autoradiography of 90Sr in developing rats.. Munich Personal RePEc Archive (Ludwig Maximilian University of Munich). 87(2). 123–8. 2 indexed citations

19.

Olsen, Ingar. (1976). Studies on oral yeast infection, with emphasis on denture stomatitis.. Munich Personal RePEc Archive (Ludwig Maximilian University of Munich). 86(11). 497–501. 10 indexed citations

20.

L�kken, P., et al.. (1975). Bilateral surgical removal of impacted lower third molar teeth as a model for drug evaluation: A test with ibuprofen. European Journal of Clinical Pharmacology. 8(3-4). 209–216. 106 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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