Academic article

• Jiazheng Cai; Ying Xue; Stian Tornaas et al. (2026). Imaging mass cytometry unveils functional and spatial remodeling of peri-lesional cells in jaw osteonecrosis. (external link)
• Jale Moradi; Ellen Berggreen; Eva Gerdts et al. (2026). Taxonomic and functional signatures of smoking and periodontitis severity in the subgingival microbiome of older adults. (external link)
• Linda Hasselgren; Ellen Berggreen; Hager Rahmatalla Zein Elabdeen et al. (2025). The Association Between Oral Diseases, Symptoms, and Oral Health-Related Quality of Life in 70-Year-Olds: A Cross-Sectional Study. (external link)
• Panagiota Papadakou; Tine Veronica Karlsen; Helge Wiig et al. (2015). Determination of lymph flow in murine oral mucosa using depot clearance of near-infrared-labeled albumin. (external link)
• Athanasia Bletsa; Torbjørn Nedrebø; Karin Johanne Heyeraas et al. (2006). Edema in oral mucosa after LPS or cytokine exposure. (external link)
• Anca Virtej; Panagiota Papadakou; Hajime Sasaki et al. (2016). VEGFR-2 reduces while combined VEGFR-2 and -3 signaling increases inflammation in apical periodontitis. (external link)
• Lilian Ephrem Mkonyi; Vidar Bakken; Jenny Bogstad Søvik et al. (2012). Lymphangiogenesis is induced during development of periodontal disease. (external link)
• Hiba Mohamed Ali; Ellen Berggreen; Daniel Nguyen et al. (2017). Dental plaque microbial profiles of children from Khartoum, Sudan, with congenital heart defects. (external link)
• Hager Rahmatalla Zein Elabdeen; Ellen Berggreen; Knut Helge Jensen et al. (2025). Prevalence of Periodontitis in a 70-Year-Old Population in Western Norway According to the ACES 2018 Classification Framework: A Cross-Sectional Study. (external link)
• [Mangler fornavn] Heyeraas Karin J; Ellen Berggreen (1999). Interstitial fluid pressure in normal and inflamed dental pulp. (external link)
• Per Ole Iversen; Ellen Berggreen; Gunnar Nicolaysen et al. (2001). Regulation of extracellular volume and interstitial fluid pressure in rat bone marrow. (external link)
• Leo Tjäderhane; Ellen Berggreen; Inge Fristad (2023). Pulpabiologi. (external link)
• Ellen Berggreen; Krister Nyløkken; Nicolas Delaleu et al. (2009). Impaired vascular responses to parasympathetic nerve stimulation in the submandibular gland in NOD mice. (external link)
• Sivakami Rethnam Haug; Ellen Berggreen; Karin Johanne Heyeraas (2001). The effect of unilateral sympathectomy and cavity preparation on peptidergic nerves and cells in rat dental pulp. (external link)
• Jale Moradi; Ellen Berggreen; Dagmar Fosså Bunæs et al. (2025). Microbiome composition and metabolic pathways in shallow and deep periodontal pockets. (external link)
• Helge Wiig; Ellen Berggreen; Bengt Åge Sørby Borge et al. (2004). Demonstration of altered signaling responses in bone marrow extracellular fluid during increased hematopoiesis in rats using a centrifugation method. (external link)
• Ivar✝ Espelid; Kristian Anton Simonsen; Anne B Skaare et al. (2018). Forskningsnettverk med leger og tannleger: et pilotprosjekt med datauttrekk fra elektronisk pasientjournal. (external link)
• Marit Slåttelid Skeie; Anne Marit Graue; Gerd Ann-Katrin Janmyr Johansson et al. (2021). Har satsingen på pedodonti gitt resultater? Henvisninger til spesialister i pedodonti i Hordaland i 2014-2019.. (external link)
• Anca Virtej; Olav Tenstad; Helge Wiig et al. (2020). Interstitial fluid drainage from rat apical area takes place via vessels in the mandibular canal.. (external link)
• Anne B Skaare; Kristian Anton Simonsen; Ivar✝ Espelid et al. (2018). Medikamentelt utløst munntørrhet hos to pasientgrupper: Et pilotprosjekt blant leger og tannleger basert på data fra elektroniske pasientjournaler og spørreskjema. (external link)
• Inge Fristad; Ellen Berggreen; Sivakami Rethnam Haug (2006). Delta (δ)opioid receptors in small and medium-sized trigeminal neurons supporting the dental pulp of rats. (external link)
• Leo Tjäderhane; Ellen Berggreen; Inge Fristad (2023). Hammaspulpan biologiaa. (external link)
• Panagiota Papadakou; Athanasia Bletsa; Mohammed Ahmed Alamin Yousif Yassin et al. (2017). Role of Hyperplasia of Gingival Lymphatics in Periodontal Inflammation. (external link)
• Bengt Åge Sørby Borge; Karl-Henning Kalland; Sue Olsen et al. (2009). Cytokines are produced locally by myocytes in rat skeletal muscle during endotoxemia. (external link)
• Sarala Banjara; Ellen Berggreen; Jannicke Igland et al. (2025). Plasma levels of immune system activation markers Neopterin and Kynurenine-to-Tryptophan Ratio, and oral health among community-dwelling adults in Norway: a population-based, cohort study. (external link)
• Ellen Berggreen; Helge Wiig (2013). Lymphangiogenesis and lymphatic function in periodontal disease. (external link)
• Lilian Ephrem Mkonyi; Athanasia Bletsa; Anne Isine Bolstad et al. (2012). Gingival lymphatic drainage protects against porphyromonas gingivalis-induced bone loss in mice. (external link)
• Hiba Mohamed Ali; Manal Mustafa; Siham Hasabalrasol et al. (2016). Presence of plaque, gingivitis and caries in Sudanese children with congenital heart defects. (external link)
• Karin Johanne Heyeraas; Ellen Berggreen (1999). Interstitiel fluid pressure in normal and inflamed pulp. (external link)
• Ellen Berggreen; Karin Johanne Heyeraas (2000). Effect of the sensory neuropeptide antagonists h-CGRP(8-37) and SR 140.33 on pulpal and gingival blood flow in ferrets. (external link)
• Ellen Berggreen; Sivakami Rethnam Haug; Lilian Ephrem Mkonyi et al. (2009). Characterization of the dental lymphatic system and identification of cells immunopositive to specific lymphatic markers. (external link)
• Ragda Omar Abbasher Saleem; Samih Salah Eldin Mahgoub Mohamed-Ahmed; Rammah Elnour et al. (2021). Conditioned medium from bone marrow mesenchymal stem cells restored oxidative stress-related impaired osteogenic differentiation. (external link)
• Gerhard Sulo; Elwalid Fadul Nasir; Ann Louise Toftesund et al. (2021). Regional variations in caries experience, predictors, and follow-up among children and adolescents in Western Norway. (external link)
• Athanasia Bletsa; Anca Virtej; Ellen Berggreen (2012). Vascular endothelial growth factors and receptors are up-regulated during development of apical periodontitis. (external link)
• Ellen Berggreen; Karin Johanne Heyeraas (2003). Role of K+ATP channels, endothelin A receptors, and effect of angiotensin II on blood flow in oral tissues. (external link)
• Ellen Berggreen; Helge Wiig; Karin Johanne Heyeraas (2003). Blood flow and interstitial fluid pressure in the rat submandibular gland during changes in perfusion. (external link)
• Leo Tjäderhane; Ellen Berggreen; Inge Fristad (2023). Pulp biology. (external link)
• Leo Tjäderhane; Ellen Berggreen; Inge Fristad (2023). Pulpabiologi. (external link)
• Anca Virtej; Sigbjørn Suk Løes; Ellen Berggreen et al. (2013). Localization and signaling patterns of vascular endothelial growth factors and receptors in human periapical lesions. (external link)
• Athanasia Bletsa; Hisham Abdalla; Sigbjørn Suk Løes et al. (2018). Lymphatic growth factors are expressed in human gingiva and upregulated in gingival fibroblasts after stimulation. (external link)
• Ellen Berggreen; Nils Roar Gjerdet; Inge Fristad (2008). Retrograde fyllingsmaterialer – en oversikt over aktuelle materialer. (external link)
• Anca Virtej; Sigbjørn Suk Løes; Ole Iden et al. (2013). Vascular endothelial growth factors signalling in normal human dental pulp: a study of gene and protein expression. (external link)
• Ellen Berggreen; Anca Virtej (2021). Pulpa og væskedrenasje. Hva vet vi nå og hva kan det bety i klinikken?. (external link)
• Stine Hufthammer Indrelid; Harsh Nitin Dongre; Ivana Pereira Nunes et al. (2023). Human gingival epithelial cells stimulate proliferation, migration, and tube formation of lymphatic endothelial cells in vitro. (external link)
• Ivar Espelid; Kristian Anton Simonsen; Anne B Skaare et al. (2018). Forskningsnettverk med leger og tannleger. (external link)
• Athanasia Bletsa; Ellen Berggreen; Pongsri Brudvik (2006). Interleukin-1α and tumor necrosis factor-α expression during the early phases of orthodontic tooth movement in rats. (external link)
• Athanasia Bletsa; Ellen Berggreen; Inge Fristad et al. (2006). Cytokine signalling in rat pulp interstitial fluid and transcapillary fluid exchange during lipopolysaccharide-induced acute inflammation. (external link)
• Ellen Berggreen; Karin Johanne Heyeraas (1999). The role of sensory neuropeptides and nitric oxide on pulpal blood flow and tissue pressure in the ferret. (external link)
• Hiba Mohamed Ali; Manal Mustafa; Salwa Suliman et al. (2020). Inflammatory mediators in saliva and gingival fluid of children with congenital heart defect. (external link)
• Athanasia Bletsa; Ole Iden; Gerhard Sulo et al. (2020). Arbeidserfaring påvirker behandlingsrutiner i endodonti. (external link)
• Ellen Berggreen; Varawan Sae-Lim; Atanasia Bletsa et al. (2001). Effect of denervation on healing after tooth replantation in the ferret. (external link)
• Maria Csillag; Ellen Berggreen; Inge Fristad et al. (2004). Effect of electrical tooth stimulation on blood flow and immunocompetent cells in rat dental pulp after sympathectomy. (external link)
• Athanasia Bletsa; Karin Johanne Heyeraas; Sivakami Rethnam Haug et al. (2004). IL-alpha and TNF-alpha expression in rat periapical lesions and dental pulp after unilateral sympathectomy. (external link)
• Emad AlShwaimi; Ellen Berggreen; Hisako Furusho et al. (2013). IL-17 receptor a signaling is protective in infection-stimulated priapical bone destruction. (external link)
• Lilian Ephrem Mkonyi; Athanasia Bletsa; Inge Fristad et al. (2010). Importance of lymph vessels in transcapillary fluid balance in gingiva studied in a transgenic mouse model. (external link)
• Ellen Berggreen; Helge Wiig (2006). Lowering of interstitial fluid pressure in rat submandibular gland: a novel mechanism in saliva secretion. (external link)
• Malin V Jonsson; Nicolas Delaleu; Karl Albert Brokstad et al. (2006). Impaired salivary gland function in NOD mice - Association with changes in cytokine profile but not with histopathologic changes in the salivary gland. (external link)
• Athanasia Bletsa; Ole Iden; Gerhard Sulo et al. (2019). Work experience influences treatment approaches in endodontics: a questionnaire survey among dentists in Western Norway. (external link)
• Sivakami Rethnam Haug; Bina Raju; Inge Fristad et al. (2010). Differential expression of neuropeptide Y Y1 receptors during pulpal inflammation. (external link)
• Anca Virtej; Larissa Alexandrina von Marti; Marek Wagner et al. (2024). Contribution of initial lymphatics to oral wound healing after tooth extraction. (external link)
• Leo Tjäderhane; Ellen Berggreen; Inge Fristad (2023). Líffræði tannkviku. (external link)
• Athanasia Bletsa; Inge Fristad; Ellen Berggreen (2009). Sensory pulpal nerve fibres and trigeminal ganglion neurons express IL-1RI: a potential mechanism for development of inflammatory hyperalgesia. (external link)

Reader opinion

• Ellen Berggreen; Elin Synnøve Hadler-Olsen (2025). Bedre vilkår for tannlege­utdanningen krever forståelse av sektoransvar. (external link)

Media feature article

• Ellen Berggreen; Elin Synnøve Hadler-Olsen (2025). Fremtidens tannhelsetjenester og tannlegeutdanning. Et svar. (external link)
• Vibeke Hervik Bull; Elin Synnøve Hadler-Olsen; Ellen Berggreen et al. (2021). De odontologiske kompetansesentrene satser på forskning på sårbare grupper for å redusere ulikheter i oral helse. (external link)

Conference poster

• Sivakami Rethnam Haug; Bina Raju; Inge Fristad et al. (2008). NPY-Y1 receptors in normal and inflamed dental pulp. (external link)
• Athanasia Bletsa; Inge Fristad; Ellen Berggreen (2008). Localization of IL-1RI in rat dental pulp. (external link)
• Ellen Berggreen; Karin Johanne Heyeraas (2002). Effect of endothelin and angiotensin II on blood flow in the dental pulp and gingiva. (external link)
• Anca Virtej; Olav Tenstad; Helge Wiig et al. (2018). Lymphatic transport route from the dental pulp. (external link)
• LE Mkonyi; Athanasia Bletsa; Anne Isine Bolstad et al. (2010). Role of gingival lymphatics during Porphyromonas gingivalis-induced periodontitis. (external link)
• Athanasia Bletsa; Hisham Saghayroon E. Abdalla; Sigbjørn Suk Løes et al. (2017). Expression of Lymphatic Growth Factors in Human Gingiva. (external link)
• Ellen Berggreen; Karin Johanne Heyeraas (2001). Role of ATP-sensitive K+ channels in blood flow regulation in oral tissues. (external link)
• Ellen Berggreen; Karin Johanne Heyeraas; Helge Wiig (2001). Blood flow and interstitial fluid pressure during changes in perfusion and after nervous stimulation in rat submandibular gland. (external link)
• Anca Virtej; Athanasia Bletsa; Hajime Sasaki et al. (2014). Combined Inhibition of VEGFR-2 and -3 Reduces Murine Periapical Inflammation. (external link)
• Stine Hufthammer Indrelid; Athanasia Bletsa; Ivana Pereira Nunes et al. (2020). Vascular endothelial growth factor C, but not VEGF-A and D, is upregulated in gingival epithelium after inflammatory and microbial exposure. (external link)
• Stine Hufthammer Indrelid; Athanasia Bletsa; Ivana Pereira Nunes et al. (2020). Vascular endothelial growth factor C, but not VEGF-A and D, is upregulated in gingival epithelium after inflammatory and microbial exposure. (external link)
• Anca Virtej; Sigbjørn Suk Løes; Athanasia Bletsa et al. (2011). Immunohistochemical analysis of vascular endothelial growth factors and receptors in human periapical lesions.. (external link)
• Anca Virtej; Olav Tenstad; Helge Wiig et al. (2019). Protein-rich fluid dynamics from the periapical mandibular area in rats. (external link)
• Anca Virtej; Sigbjørn Suk Løes; Athanasia Bletsa et al. (2012). Localization of vascular endothelial growth factors and receptors and their gene signalling in human periapical lesions.. (external link)
• M Csillag; Ellen Berggreen; Inge Fristad et al. (2004). Electrical Stimulation and Immune Cells in Rat Pulp after Sympathectomy. (external link)
• Ellen Berggreen; Varawan Sae-Lim; Sivakami Rethnam Haug et al. (2000). Hard tissue responses in denervated replanted teeth in ferrets. (external link)
• Karin Johanne Heyeraas; Ellen Berggreen (2000). Effect of sensory neuropeptide antagonists on resting pulpal and gingival blood flow. (external link)
• Per Ole Iversen; Karin Johanne Heyeraas; Ellen Berggreen et al. (2000). Regulation of extracellular volumes and interstitial pressure within the rat bone marrow. (external link)

Doctoral thesis (PhD)

• Panagiota Papadakou; Ellen Berggreen (2017). Lymphatic responses in dental infectious diseases characterized by alveolar bone resorption. (external link)
• Ellen Berggreen (1998). Functions and morphology of nerves in oral tissues. Studies in cats, rats and ferrets. (external link)
• Anca Virtej; Ellen Berggreen (2016). Vascular endothelial growth factors and receptors - from normal dental pulp to apical pathology. (external link)

Conference lecture

• Ellen Berggreen; Karin Johanne Heyeraas (1999). Role of nitric oxide in the regulation of pulpal blood flow. (external link)
• Sivakami Rethnam Haug; Ellen Berggreen; Margaret R. Byers et al. (2000). Unilateral Sympathectomy and Dental Pulp Injury in Rats. (external link)
• Ellen Berggreen; Karin Johanne Heyeraas (1998). Effect of CGRP antagonist on pulpal blood flow and tissue pressure in ferrets. (external link)

Academic literature review

• Ellen Berggreen; Helge Wiig; Anca Virtej (2020). Fluid transport from the dental pulp revisited. (external link)
• Ellen Berggreen; Helge Wiig (2014). Lymphatic function and responses in periodontal disease. (external link)
• Ellen Berggreen; Athanasia Bletsa; Karin Johanne Heyeraas (2010). Circulation in normal and inflamed dental pulp. (external link)

Master’s thesis

• Krister Nyløkken; Ellen Berggreen (2006). Autonom innervasjon i gl.Submandibularis i en dyremodell for Sjøgren Syndrom. (external link)

Conference abstract

• Ellen Berggreen; Krister Nyløkken; Nicolas Delaleu et al. (2006). Impaired vascular responses to parasympathetic stimulation in the submandibular gland in NOD mice. (external link)
• Malin V Jonsson; Nicolas Delaleu; Karl Albert Brokstad et al. (2006). Impaired salivary gland function in nod mice - Association with changes in cytokine profile but not with salivary gland histopathology. (external link)
• Malin V Jonsson; Karl Albert Brokstad; Kathrine Skarstein et al. (2008). Salivary gland interstitial fluid cytokines in NOD mice. (external link)

Lecture

• Ellen Berggreen; Inge Fristad (2013). Pulpa i et nøtteskall. (external link)

Textbook

• Paivi Kettunen; Keijo Luukko; Inge Fristad et al. (2010). The advanced science of endodontics - Structure and Functions of the Dentin-Pulp Complex. In: Pathways of the pulp. (external link)
• Inge Fristad; Ellen Berggreen (2020). Biological Basis of Endodontics - Structure and Function of the Dental-Pulp Complex, in Pathways of the Pulp, 12th edition. (external link)
• Inge Fristad; Ellen Berggreen (2015). Advanced Science of Endodontics - Structure and Functions of the Dentin-Pulp Complex. In: Pathways of the Pulp. (external link)

Media interview

• Marikken Høiseth; Tone Natland Fagerhaug; Ewa Alicja Szyszko Hovden et al. (2021). Mottok 40 millioner fra Forskningsrådet. (external link)

See a complete overview of publications in NVA.