Academic article

• Elabdeen, Hager Rahmatalla Zein; Berggreen, Ellen; Jensen, Knut Helge 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)
• Moradi, Jale; Berggreen, Ellen; Bunæs, Dagmar Fosså et al. (2025). Microbiome composition and metabolic pathways in shallow and deep periodontal pockets. (external link)
• Virtej, Anca; Marti, Larissa Alexandrina von; Wagner, Marek et al. (2024). Contribution of initial lymphatics to oral wound healing after tooth extraction. (external link)
• Tjäderhane, Leo; Berggreen, Ellen; Fristad, Inge (2023). Líffræði tannkviku. (external link)
• Indrelid, Stine Hufthammer; Dongre, Harsh Nitin; Nunes, Ivana Pereira et al. (2023). Human gingival epithelial cells stimulate proliferation, migration, and tube formation of lymphatic endothelial cells in vitro. (external link)
• Tjäderhane, Leo; Berggreen, Ellen; Fristad, Inge (2023). Hammaspulpan biologiaa. (external link)
• Tjäderhane, Leo; Berggreen, Ellen; Fristad, Inge (2023). Pulpabiologi. (external link)
• Tjäderhane, Leo; Berggreen, Ellen; Fristad, Inge (2023). Pulpabiologi. (external link)
• Tjäderhane, Leo; Berggreen, Ellen; Fristad, Inge (2023). Pulp biology. (external link)
• Skeie, Marit Slåttelid; Graue, Anne Marit; Johansson, Gerd Ann-Katrin Janmyr et al. (2021). Har satsingen på pedodonti gitt resultater? Henvisninger til spesialister i pedodonti i Hordaland i 2014-2019. . (external link)
• Saleem, Ragda Omar Abbasher; Mohamed-Ahmed, Samih Salah Eldin Mahgoub; Elnour, Rammah et al. (2021). Conditioned medium from bone marrow mesenchymal stem cells restored oxidative stress-related impaired osteogenic differentiation. (external link)
• Sulo, Gerhard; Nasir, Elwalid Fadul; Toftesund, Ann Louise et al. (2021). Regional variations in caries experience, predictors, and follow-up among children and adolescents in Western Norway. (external link)
• Berggreen, Ellen; Virtej, Anca (2021). Pulpa og væskedrenasje. Hva vet vi nå og hva kan det bety i klinikken?. (external link)
• Mohamed Ali, Hiba; Mustafa , Manal ; Suliman, Salwa et al. (2020). Inflammatory mediators in saliva and gingival fluid of children with congenital heart defect. (external link)
• Bletsa, Athanasia; Iden, Ole; Sulo, Gerhard et al. (2020). Arbeidserfaring påvirker behandlingsrutiner i endodonti. (external link)
• Virtej, Anca; Tenstad, Olav; Wiig, Helge et al. (2020). Interstitial fluid drainage from rat apical area takes place via vessels in the mandibular canal.. (external link)
• Bletsa, Athanasia; Iden, Ole; Sulo, Gerhard et al. (2019). Work experience influences treatment approaches in endodontics: a questionnaire survey among dentists in Western Norway. (external link)
• Bletsa, Athanasia; Abdalla, Hisham; Løes, Sigbjørn Suk et al. (2018). Lymphatic growth factors are expressed in human gingiva and upregulated in gingival fibroblasts after stimulation. (external link)
• Skaare, Anne B; Simonsen, Kristian Anton; Espelid, Ivar✝ 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)
• Espelid, Ivar✝; Simonsen, Kristian Anton; Skaare, Anne B et al. (2018). Forskningsnettverk med leger og tannleger: et pilotprosjekt med datauttrekk fra elektronisk pasientjournal . (external link)
• Espelid, Ivar; Simonsen, Kristian Anton; Skaare, Anne B et al. (2018). Forskningsnettverk med leger og tannleger. (external link)
• Papadakou, Panagiota; Bletsa, Athanasia; Yassin, Mohammed Ahmed Alamin Yousif et al. (2017). Role of Hyperplasia of Gingival Lymphatics in Periodontal Inflammation. (external link)
• Mohamed Ali, Hiba; Berggreen, Ellen; Nguyen, Daniel et al. (2017). Dental plaque microbial profiles of children from Khartoum, Sudan, with congenital heart defects. (external link)
• Virtej, Anca; Papadakou, Panagiota; Sasaki, Hajime et al. (2016). VEGFR-2 reduces while combined VEGFR-2 and -3 signaling increases inflammation in apical periodontitis. (external link)
• Mohamed Ali, Hiba; Mustafa, Manal; Hasabalrasol, Siham et al. (2016). Presence of plaque, gingivitis and caries in Sudanese children with congenital heart defects. (external link)
• Papadakou, Panagiota; Karlsen, Tine Veronica; Wiig, Helge et al. (2015). Determination of lymph flow in murine oral mucosa using depot clearance of near-infrared-labeled albumin. (external link)
• Berggreen, Ellen; Wiig, Helge (2013). Lymphangiogenesis and lymphatic function in periodontal disease. (external link)
• AlShwaimi, Emad; Berggreen, Ellen; Furusho, Hisako et al. (2013). IL-17 receptor a signaling is protective in infection-stimulated priapical bone destruction. (external link)
• Virtej, Anca; Løes, Sigbjørn Suk; Iden, Ole et al. (2013). Vascular endothelial growth factors signalling in normal human dental pulp: a study of gene and protein expression. (external link)
• Virtej, Anca; Løes, Sigbjørn Suk; Berggreen, Ellen et al. (2013). Localization and signaling patterns of vascular endothelial growth factors and receptors in human periapical lesions. (external link)
• Mkonyi, Lilian Ephrem; Bakken, Vidar; Søvik, Jenny Bogstad et al. (2012). Lymphangiogenesis is induced during development of periodontal disease. (external link)
• Mkonyi, Lilian Ephrem; Bletsa, Athanasia; Bolstad, Anne Isine et al. (2012). Gingival lymphatic drainage protects against porphyromonas gingivalis-induced bone loss in mice. (external link)
• Bletsa, Athanasia; Virtej, Anca; Berggreen, Ellen (2012). Vascular endothelial growth factors and receptors are up-regulated during development of apical periodontitis. (external link)
• Mkonyi, Lilian Ephrem; Bletsa, Athanasia; Fristad, Inge et al. (2010). Importance of lymph vessels in transcapillary fluid balance in gingiva studied in a transgenic mouse model. (external link)
• Haug, Sivakami Rethnam; Raju, Bina; Fristad, Inge et al. (2010). Differential expression of neuropeptide Y Y1 receptors during pulpal inflammation. (external link)
• Berggreen, Ellen; Haug, Sivakami Rethnam; Mkonyi, Lilian Ephrem et al. (2009). Characterization of the dental lymphatic system and identification of cells immunopositive to specific lymphatic markers. (external link)
• Borge, Bengt Åge Sørby; Kalland, Karl-Henning; Olsen, Sue et al. (2009). Cytokines are produced locally by myocytes in rat skeletal muscle during endotoxemia. (external link)
• Berggreen, Ellen; Nyløkken, Krister; Delaleu, Nicolas et al. (2009). Impaired vascular responses to parasympathetic nerve stimulation in the submandibular gland in NOD mice. (external link)
• Bletsa, Athanasia; Fristad, Inge; Berggreen, Ellen (2009). Sensory pulpal nerve fibres and trigeminal ganglion neurons express IL-1RI: a potential mechanism for development of inflammatory hyperalgesia. (external link)
• Berggreen, Ellen; Gjerdet, Nils Roar; Fristad, Inge (2008). Retrograde fyllingsmaterialer – en oversikt over aktuelle materialer. (external link)
• Fristad, Inge; Berggreen, Ellen; Haug, Sivakami Rethnam (2006). Delta (δ)opioid receptors in small and medium-sized trigeminal neurons supporting the dental pulp of rats. (external link)
• Bletsa, Athanasia; Berggreen, Ellen; Brudvik, Pongsri (2006). Interleukin-1α and tumor necrosis factor-α expression during the early phases of orthodontic tooth movement in rats. (external link)
• Bletsa, Athanasia; Nedrebø, Torbjørn; Heyeraas, Karin Johanne et al. (2006). Edema in oral mucosa after LPS or cytokine exposure. (external link)
• Berggreen, Ellen; Wiig, Helge (2006). Lowering of interstitial fluid pressure in rat submandibular gland: a novel mechanism in saliva secretion. (external link)
• Bletsa, Athanasia; Berggreen, Ellen; Fristad, Inge et al. (2006). Cytokine signalling in rat pulp interstitial fluid and transcapillary fluid exchange during lipopolysaccharide-induced acute inflammation. (external link)
• Jonsson, Malin V; Delaleu, Nicolas; Brokstad, Karl Albert 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)
• Wiig, Helge; Berggreen, Ellen; Borge, Bengt Åge Sørby et al. (2004). Demonstration of altered signaling responses in bone marrow extracellular fluid during increased hematopoiesis in rats using a centrifugation method. (external link)
• Bletsa, Athanasia; Heyeraas, Karin Johanne; Haug, Sivakami Rethnam et al. (2004). IL-alpha and TNF-alpha expression in rat periapical lesions and dental pulp after unilateral sympathectomy. (external link)
• Csillag, Maria; Berggreen, Ellen; Fristad, Inge et al. (2004). Effect of electrical tooth stimulation on blood flow and immunocompetent cells in rat dental pulp after sympathectomy. (external link)
• Berggreen, Ellen; Wiig, Helge; Heyeraas, Karin Johanne (2003). Blood flow and interstitial fluid pressure in the rat submandibular gland during changes in perfusion. (external link)
• Berggreen, Ellen; Heyeraas, Karin Johanne (2003). Role of K+ATP channels, endothelin A receptors, and effect of angiotensin II on blood flow in oral tissues. (external link)
• Iversen, Per Ole; Berggreen, Ellen; Nicolaysen, Gunnar et al. (2001). Regulation of extracellular volume and interstitial fluid pressure in rat bone marrow. (external link)
• Haug, Sivakami Rethnam; Berggreen, Ellen; Heyeraas, Karin Johanne (2001). The effect of unilateral sympathectomy and cavity preparation on peptidergic nerves and cells in rat dental pulp. (external link)
• Berggreen, Ellen; Sae-Lim, Varawan; Bletsa, Atanasia et al. (2001). Effect of denervation on healing after tooth replantation in the ferret. (external link)
• Berggreen, Ellen; Heyeraas, Karin Johanne (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)
• Heyeraas Karin J, [Mangler fornavn]; Berggreen, Ellen (1999). Interstitial fluid pressure in normal and inflamed dental pulp. (external link)
• Heyeraas, Karin Johanne; Berggreen, Ellen (1999). Interstitiel fluid pressure in normal and inflamed pulp. (external link)
• Berggreen, Ellen; Heyeraas, Karin Johanne (1999). The role of sensory neuropeptides and nitric oxide on pulpal blood flow and tissue pressure in the ferret. (external link)

Feature article

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

Interview Journal

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

Poster

• Indrelid, Stine Hufthammer; Bletsa, Athanasia; Nunes, Ivana Pereira 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)
• Indrelid, Stine Hufthammer; Bletsa, Athanasia; Nunes, Ivana Pereira 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)
• Virtej, Anca; Tenstad, Olav; Wiig, Helge et al. (2019). Protein-rich fluid dynamics from the periapical mandibular area in rats. (external link)
• Virtej, Anca; Tenstad, Olav; Wiig, Helge et al. (2018). Lymphatic transport route from the dental pulp. (external link)
• Bletsa, Athanasia; Abdalla, Hisham Saghayroon E.; Løes, Sigbjørn Suk et al. (2017). Expression of Lymphatic Growth Factors in Human Gingiva. (external link)
• Virtej, Anca; Bletsa, Athanasia; Sasaki, Hajime et al. (2014). Combined Inhibition of VEGFR-2 and -3 Reduces Murine Periapical Inflammation . (external link)
• Virtej, Anca; Løes, Sigbjørn Suk; Bletsa, Athanasia et al. (2012). Localization of vascular endothelial growth factors and receptors and their gene signalling in human periapical lesions.. (external link)
• Virtej, Anca; Løes, Sigbjørn Suk; Bletsa, Athanasia et al. (2011). Immunohistochemical analysis of vascular endothelial growth factors and receptors in human periapical lesions.. (external link)
• Mkonyi, LE; Bletsa, Athanasia; Bolstad, Anne Isine et al. (2010). Role of gingival lymphatics during Porphyromonas gingivalis-induced periodontitis. (external link)
• Bletsa, Athanasia; Fristad, Inge; Berggreen, Ellen (2008). Localization of IL-1RI in rat dental pulp. (external link)
• Haug, Sivakami Rethnam; Raju, Bina; Fristad, Inge et al. (2008). NPY-Y1 receptors in normal and inflamed dental pulp. (external link)
• Csillag, M; Berggreen, Ellen; Fristad, Inge et al. (2004). Electrical Stimulation and Immune Cells in Rat Pulp after Sympathectomy. (external link)
• Berggreen, Ellen; Heyeraas, Karin Johanne (2002). Effect of endothelin and angiotensin II on blood flow in the dental pulp and gingiva. (external link)
• Berggreen, Ellen; Heyeraas, Karin Johanne (2001). Role of ATP-sensitive K+ channels in blood flow regulation in oral tissues. (external link)
• Berggreen, Ellen; Heyeraas, Karin Johanne; Wiig, Helge (2001). Blood flow and interstitial fluid pressure during changes in perfusion and after nervous stimulation in rat submandibular gland. (external link)
• Heyeraas, Karin Johanne; Berggreen, Ellen (2000). Effect of sensory neuropeptide antagonists on resting pulpal and gingival blood flow. (external link)
• Berggreen, Ellen; Sae-Lim, Varawan; Haug, Sivakami Rethnam et al. (2000). Hard tissue responses in denervated replanted teeth in ferrets. (external link)
• Iversen, Per Ole; Heyeraas, Karin Johanne; Berggreen, Ellen et al. (2000). Regulation of extracellular volumes and interstitial pressure within the rat bone marrow. (external link)

Academic literature review

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

Textbook

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

Doctoral dissertation

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

Popular scientific lecture

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

Abstract

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

Masters thesis

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

Academic lecture

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

See a complete overview of publications in Cristin.