Pia Titterud Sunde

• Katle, Erik; Zandi, Homan; Pedersen, Deniz; Sunde, Pia Titterud; Torgersen, Gerald R. & Ørstavik, Dag Solmund (2024). Radiographic outcome of endodontic treatment and retreatment of teeth with apical periodontitis using two different root canal irrigants. A prospective cohort study. International Endodontic Journal. ISSN 0143-2885. 57(3), p. 297–304. doi: 10.1111/iej.14019.
• Kapralos, Vasileios; Camilleri, Josette; Koutroulis, Andreas; Valen, Håkon; Ørstavik, Dag Solmund & Sunde, Pia Titterud (2023). Endodontic sealers after exposure to chlorhexidine digluconate: An assessment of physicochemical properties. Dental Materials. ISSN 0109-5641. doi: 10.1016/j.dental.2023.11.019. Full text in Research Archive
• Astudillo-Ortiz, Esteban; Babo, Pedro S.; Sunde, Pia Titterud; Galler, Kerstin M.; Gomez-Florit, Manuel & Gomes, Manuela E. (2023). Endodontic Tissue Regeneration: A Review for Tissue Engineers and Dentists. Tissue Engineering Part B: Reviews. ISSN 1937-3368. 29(5), p. 491–513. doi: 10.1089/ten.teb.2022.0211.
• Koutroulis, Andreas; Valen, Håkon; Ørstavik, Dag Solmund; Kapralos, Vasileios; Camilleri, Josette & Sunde, Pia Titterud (2023). Antibacterial Activity of Root Repair Cements in Contact with Dentin—An Ex Vivo Study. Journal of Functional Biomaterials. ISSN 2079-4983. 14(10). doi: 10.3390/jfb14100511. Full text in Research Archive
• Koutroulis, Andreas; Valen, Håkon; Ørstavik, Dag Solmund; Kapralos, Vasileios; Camilleri, Josette & Sunde, Pia Titterud (2023). Effect of exposure conditions on chemical properties of materials for surgical endodontic procedures. European Journal of Oral Sciences. ISSN 0909-8836. 131(4). doi: 10.1111/eos.12943. Full text in Research Archive
• Agger, Anne Eriksson; Reseland, Janne Elin; Hjelkrem, Erik; Lian, Aina-Mari; Hals, Else Kristine Breivik & Zandi, Homan [Show all 7 contributors for this article] (2023). Are comorbidities associated with the cytokine/chemokine profile of persistent apical periodontitis? Clinical Oral Investigations. ISSN 1432-6981. 27, p. 5203–5215. doi: 10.1007/s00784-023-05139-3.
• Diep, My Tien; Hove, Lene Hystad; Ørstavik, Dag Solmund; Skudutyte-Rysstad, Rasa; Sødal, Anne Thea Tveit & Sunde, Pia Titterud (2022). Periapical and endodontic status among 65-year-old Oslo-citizens. BMC Oral Health. ISSN 1472-6831. 22(1). doi: 10.1186/s12903-022-02406-9. Full text in Research Archive
• Koutroulis, Andreas; Valen, Håkon; Ørstavik, Dag Solmund; Kapralos, Vasileios; Camilleri, Josette & Sunde, Pia Titterud (2022). Surface characteristics and bacterial adhesion of endodontic cements. Clinical Oral Investigations. ISSN 1432-6981. 26, p. 6995–7009. doi: 10.1007/s00784-022-04655-y. Full text in Research Archive
• Kapralos, Vasileios; Sunde, Pia Titterud; Camilleri, Josette; Morisbak, Else; Koutroulis, Andreas & Ørstavik, Dag Solmund [Show all 7 contributors for this article] (2022). Effect of chlorhexidine digluconate on antimicrobial activity, cell viability and physicochemical properties of three endodontic sealers. Dental Materials. ISSN 0109-5641. 38(6), p. 1044–1059. doi: 10.1016/j.dental.2022.04.013. Full text in Research Archive
• Kapralos, Vasileios; Valen, Håkon; Koutroulis, Andreas; Camilleri, Josette; Ørstavik, Dag Solmund & Sunde, Pia Titterud (2022). The dentine-sealer interface: Modulation of antimicrobial effects by irrigation. International Endodontic Journal. ISSN 0143-2885. 55(5), p. 544–560. doi: 10.1111/iej.13692. Full text in Research Archive
• Hildebrand, Torben; Parreiras Nogueira, Liebert; Sunde, Pia Titterud; Ørstavik, Dag Solmund; Glasmacher, Birgit & Haugen, Håvard Jostein (2021). Contrast-enhanced nano-CT reveals soft dental tissues and cellular layers. International Endodontic Journal. ISSN 0143-2885. 54(8), p. 1275–1288. doi: 10.1111/iej.13527.
• Jordal, Kristin; Skudutyte-Rysstad, Rasa; Sen, Abhijit; Torgersen, Gerald; Ørstavik, Dag & Sunde, Pia Titterud (2021). Effects of an individualized training course on technical quality and periapical status of teeth treated endodontically by dentists in the Public Dental Service in Norway. An observational intervention study. International Endodontic Journal. ISSN 0143-2885. doi: 10.1111/iej.13669. Full text in Research Archive Show summary

  Aim: To investigate the effect of a continuing education course on technical quality and treatment outcome for root filled permanent teeth in Møre and Romsdal County, Norway. Methodology: Fifty-two dentists employed in the Public Dental Service in Møre and Romsdal county, Norway, completed a two-day continuing education course in root canal treatment. Periapical radiographs of root filled teeth treated before and after the course, with at least one-year follow-up were identified and scored for technical quality and periapical status. Technical root filling quality was assessed by density and length and the treatment outcome by PAI scores. Treatment information was achieved from the county's electronic dental record system. Information regarding the dental practitioners' background and treatment procedure routines was collected by a questionnaire. Descriptive statistics analyses and mixed-effect logistic regression analyses were performed to evaluate the effect of the course. Results: Radiographs were available for 224 teeth root filled before and for 221 teeth after the course. The proportion of teeth with adequate root filling quality was significantly lower after the course (p =0.006), associated mainly with short root fillings (p 18 years. Conclusions: A two-day continuing education course in root canal treatment attended by Public Dental Service dentists in Norway did not improve the technical quality of root fillings or periapical status associated with root filled teeth. Keywords: apical periodontitis; continuing education; endodontics; general dental practitioner; reciprocating technique; root filling quality.

• Torben, Hildebrand; Nogueira, Liebert Parreiras; Sunde, Pia Titterud; Ørstavik, Dag; Glasmacher, Birgit & Haugen, Håvard Jostein (2021). Contrast-enhanced nano-CT reveals dental soft tissues and cellular layers. International Endodontic Journal. ISSN 0143-2885. doi: 10.1111/iej.13527. Full text in Research Archive Show summary

  Aim: Nano-CT technologies offer 3D imaging methods that allow high-resolution examination of bones and teeth, but soft tissue components have weak X-ray attenuation and are not easily visualised in CT images. We introduce a methodology designed to simultaneously visualise dental ultrastructure, including cellular and soft tissue components, by utilising phosphotungstic acid (PTA) as a contrast-enhancement agent. Methodology: Sound third molars were collected from healthy human adults and fixed in 4% buffered paraformaldehyde. To evaluate the impact of PTA in concentrations of 0.3%, 0.7% and 1% on dental soft and hard tissues for CT imaging, cementum and dentine-pulp sections were cut, dehydrated and stained with immersion periods of 12 hours, 24 hours, 2 days or 5 days. The samples were scanned with high-resolution nano-CT, where we examined both the cementum and pulpal regions with pixel sizes down to 0.5 µm for dental-pulp sections. Results: Dental cementum and periodontium as well as odontoblasts and predentine were made visible through PTA-staining in high-resolution three-dimensional nano-CT scans. Different segments of the tooth required different staining protocols. The thickness of the cementum could be computed over the height of the tooth once it was made visible by the PTA-enhanced contrast, and the attached soft tissue components of the interior of the tooth could be shown on the dentine-pulp interface in greater detail. Three-dimensional illustrations allowed a histology-like visualisation of the sections in all orientations with a single scan and easy sample preparation. The segmentation of the sigmoidal dentinal tubules and the surrounding dentine allowed a three-dimensional investigation and quantative of the dentine composition, such as the tubular lumen or the ratio of the tubular lumen area to the dentinal surface. Conclusion: The staining protocol made it possible to visualise hard tissues along with cellular layers and soft tissues using a laboratory-based nano-CT technique. The protocol depended on both tissue type and size. This methodology offers enhanced possibilities for the concomitant visualisation of soft and hard dental tissues.

• Jordal, Kristin; Sen, Abhijit; Skudutyte-Rysstad, Rasa; Ørstavik, Dag & Sunde, Pia Titterud (2021). Effects of an individualised training course in endodontics on the knowledge and insights of dentists in Public Dental Service in Norway. Acta Odontologica Scandinavica. ISSN 0001-6357. doi: 10.1080/00016357.2021.1876915.
• Kapralos, Vasileios; Valen, Håkon; Ørstavik, Dag; Koutroulis, Andreas; Camilleri, Josette & Sunde, Pia Titterud (2020). Antimicrobial and physicochemical characterization of endodontic sealers after exposure to chlorhexidine digluconate. Dental Materials. ISSN 0109-5641. doi: 10.1016/j.dental.2020.11.011.
• Nagendrababu, Venkateshbabu; Chong, Bunsan; McCabe, Paul S.; Shah, Pratik K.; Priya, Ekta & Jayaraman, Jayakumar [Show all 10 contributors for this article] (2020). PRICE 2020 guidelines for reporting case reports in Endodontics: a consensus-based development. International Endodontic Journal. ISSN 0143-2885. 53, p. 619–626. doi: 10.1111/iej.13285.
• Knudsen, Dyveke; Ottersen, Margareth Kristensen; Ørstavik, Dag & Sunde, Pia Titterud (2019). Multiple idiopatiske cervikale rotresorpsjoner - forekomst og kasuistikker . Den norske tannlegeforenings tidende. ISSN 0029-2303. 129(4), p. 342–351.
• Hardersen, Line Rørslett; Enersen, Morten; Kristoffersen, Anne Karin; Ørstavik, Dag & Sunde, Pia Titterud (2019). Maintenance of the aseptic working field during endodontic treatment. Acta Odontologica Scandinavica. ISSN 0001-6357. p. 1–6. doi: 10.1080/00016357.2019.1606935. Show summary

  ABSTRACT Objective: The aim of this clinical quality study was to determine whether the aseptic working field is maintained during the endodontic procedure. Materials and methods: Bacterial samples were collected from the rubber dam of 27 patients during endodontic treatment performed by postgraduate students at the Department of Endodontics, University of Oslo. A bacterial sample was first obtained immediately after disinfection of the working field (A), and the second sample was collected just before obturation or dressing with calcium hydroxide cement (B). Aerobic cultivation technique and PCR were used for detection of bacterial growth and species. Results: All samples were negative on culturing except in one case, which showed positive results with cultivation in both sample A and B. Specie detected with cultivation technique were Streptococcus mitis. With PCR technique, 6 samples in 5 patients (11%), showed positive results. Species detected with PCR technique were Bacteroidales spp. Propionibacterium spp., Bacteroidetes spp., Prevotella nigrescens, Haemophilus parainfluenzae, Neisseria elongata, Alloprevotella tannerae, Capnocytophaga granulosa, Cardiobacterium hominis, Fusobacterium nucleatum and Streptococcus mitis. Conclusion: The present study showed that an aseptic working field was maintained throughout the endodontic procedure in 81% (22/27) of the cases after disinfection of the rubber dam.

• Kapralos, Vasileios; Koutroulis, Andreas; Ørstavik, Dag; Sunde, Pia Titterud & Rukke, Håkon Valen (2018). Antibacterial Activity of Endodontic Sealers against Planktonic Bacteria and Bacteria in Biofilms. Journal of Endodontics. ISSN 0099-2399. doi: 10.1016/j.joen.2017.08.023.
• Kapralos, Vasileios; Koutroulis, Andreas; Ørstavik, Dag; Sunde, Pia Titterud & Rukke, Håkon Valen (2018). Antibacterial Activity of Endodontic Sealers against Planktonic Bacteria and Bacteria in Biofilms. Journal of Endodontics. ISSN 0099-2399. 44(1), p. 149–154. doi: 10.1016/j.joen.2017.08.023. Show summary

  INTRODUCTION: The aim of this study was to investigate the antibacterial activity of 4 endodontic sealers against bacteria planktonic grown or in biofilms commonly detected from persistent and secondary endodontic infections. METHODS: The antibacterial activity of the sealers AH Plus, TotalFill BC sealer, RoekoSeal, and Guttaflow 2 was investigated for planktonic grown and 24-hour-old biofilms of Enterococcus faecalis, Staphylococcus epidermidis, Staphylococcus aureus, and Streptococcus mutans. RESULTS: AH Plus had high antibacterial activity toward all species investigated, both planktonic and in biofilms. However, the antibacterial activity was lost after 24 hours. TotalFill BC sealer showed marked antibacterial effect on planktonic bacteria up to 7 days after setting. TotalFill BC sealer had lower antibacterial activity against biofilms of S. aureus and E. faecalis compared with AH Plus when direct contact between the sealer and biofilm was investigated and for all species investigated when a membrane was used to separate the biofilm and sealer. Guttaflow 2 and RoekoSeal had no antibacterial activity against planktonic bacteria or bacteria in biofilms. CONCLUSIONS: Bacteria in biofilms showed higher susceptibility for AH Plus compared with TotalFill BC sealer during the first 24 hours after setting. Investigating the antibacterial activity of endodontic sealers and materials against bacteria in biofilms is highly important to evaluate the materials' ability to eradicate bacteria from the infected root canal.

• Johnsen, Gaute Floer; Sunde, Pia Titterud & Haugen, Håvard Jostein (2018). Validation of contralateral premolars as the substrate for endodontic comparison studies. International Endodontic Journal. ISSN 0143-2885. 51(8), p. 942–951. doi: 10.1111/iej.12902. Full text in Research Archive Show summary

  AIM: To use micro-CT technology and metrology software to validate the use of contralateral premolars as samples in endodontic comparison studies by comparing them before and after canal instrumentation with one instrumentation system. Furthermore, to determine if contralateral premolar roots will yield non-significantly different outcomes regarding shaping ability (volume), degree of twisting, and three-dimensional shape changes. The null-hypothesis (H0 ) is that there are no differences between the contralateral premolar roots pre- or post-instrumentation. METHODOLOGY: Twenty-eight extracted human contralateral premolars (n=44 contralateral roots) from 12 donor patients were scanned with microcomputed tomography before and after instrumentation. Root canal lengths (RCL) were measured visually using a dental operating microscope, electronic apex locator, and micro-CT scans. Data were analyzed statistically for differences between pre- and post-instrumentation. RESULTS: Instrumentation increased the volume of the canals significantly (P<0.05). Degree of twisting for a majority (83%) of the contralateral roots pairs did not change significantly (P>0.05). There was no significant difference (P>0.05) in the shape deviation analysis between contralateral pairs. There was no significant difference (P>0.05) for root canal length between the contralateral pairs for any of the three endometric methods. CONCLUSION: Contralateral premolar root canals were associated with similar changes in terms of volume, three-dimensional shape, and degree of twisting from pre- to post-instrumentation. There was no difference between the contralateral premolar root pairs pre- and post-instrumentation, and the study validates contralateral premolars as samples for root canal comparison studies. The null-hypothesis (H0 ) could not be rejected. This article is protected by copyright. All rights reserved. This article is protected by copyright. All rights reserved.

• Johnsen, Gaute Floer; Dara, Sazan; Asjad, Sameenah; Sunde, Pia Titterud & Haugen, Håvard Jostein (2017). Anatomic Comparison of Contralateral Premolars. Journal of Endodontics. ISSN 0099-2399. 43(6), p. 956–963. doi: 10.1016/j.joen.2017.01.012. Show summary

  Introduction The comparative anatomy of contralateral premolars has not been previously studied. The purpose of this micro–computed tomography investigation was to qualitatively and quantitatively assess and compare the morphology of contralateral premolars in terms of length, canal width, dentinal thicknesses, accessory canals, root canal configurations, isthmi, C-shapes, root canal orifices, and apical foramina. The null hypothesis (H0) is that contralateral premolars are more morphologically similar than randomly assigned pairs for simple morphometric measurements (lengths, canal widths, and dentinal thickness). Methods Forty-one intact premolar pairs (n = 82) extracted from 28 patients were scanned with micro–computed tomography and reconstructed. Quantitative comparative assessment of measurements was performed by pairwise statistical analysis of contralateral and random pairs with Student t test and one-sample t test. All measured parameters (lengths, widths, and thicknesses) were normalized by Z score so that they could all be compared on a common scale. A correlation study was also performed. Canal configurations and isthmi were classified according to preexisting classification schemes. The number and location of accessory canals and apical foramina were registered and compared. Results/Conclusions Contralateral premolar pairs demonstrated a high degree of similarity in terms of the linear measurements (lengths, widths, and thicknesses). The apical portion (foramina, C-shapes, and accessory canals) did not demonstrate bilateral symmetry. The comprehensive statistical analysis of the normalized parameters by Z score showed no statistically significant differences between the contralateral premolar pairs. The null hypothesis (H0) was accepted.

• Sunde, Pia Titterud & Dahlén, Gunnar (2014). Aseptikk og antiseptikk i endodontien. Sunde PT, Dahlèn G. Tandlægebladet 2014; 7: 522-527. Tandlægebladet. ISSN 0039-9353.
• Kristoffersen, Anne Karin; Enersen, Morten; Kverndokk, Ellen Kristine; Sunde, Pia Titterud; Landin, Maria Augusta Dos S Silva & Solheim, Tore [Show all 8 contributors for this article] (2012). Human papillomavirus subtypes in oral lesions compared to healthy oral mucosa. Journal of Clinical Virology. ISSN 1386-6532. 53(4), p. 364–366. doi: 10.1016/j.jcv.2011.12.023.
• Handal, Trude; Caugant, Dominique A; Olsen, Ingar & Sunde, Pia Titterud (2009). Bacterial diversity in persistent periapical lesions on root-filled teeth. Journal of Oral Microbiology. ISSN 2000-2297. 1, p. 1–7. doi: 10.3402/jom.v1iO.1946.
• Sunde, Pia Titterud; Olsen, Ingar; Enersen, Morten & Grinde, Bjørn (2008). Patient with severe periodontitis and subgingival Epstein-Barr virus treated with antiviral therapy. Journal of Clinical Virology. ISSN 1386-6532. 42(2), p. 176–178. doi: 10.1016/j.jcv.2008.01.007.
• Sunde, Pia Titterud; Olsen, Ingar; Enersen, Morten; Beiske, Klaus & Grinde, Bjørn (2008). Human cytomegalovirus and Epstein-Barr virus in apical and marginal periodontitlits: A role in pathology? Journal of Medical Virology. ISSN 0146-6615. 80(6), p. 1007–1011. doi: 10.1002/jmv.21180.
• Sunde, Pia Titterud; Olsen, Ingar; Enersen, Morten & Grinde, Bjørn (2008). Spiller cytomegalovirus og Epstein-Barr virus en rolle i marginal og apikal periodontitt? Den norske tannlegeforenings tidende. ISSN 0029-2303. 118(11), p. 716–718.
• Sunde, Pia Titterud; Tronstad, Leif & Olsen, Ingar (2006). Mikroorganismer periapikalt - finnes de? In Holmstrup, Palle (Eds.), Odontologi 2006. Munksgaard Forlag. p. 83–92.
• Sunde, Pia Titterud; Tronstad, Leif & Dahle, Ulf R (2005). Spiroketer i orale infeksjoner. Den norske tannlegeforenings tidende. ISSN 0029-2303. p. 218–220.
• Tronstad, Leif & Sunde, Pia Titterud (2004). The evolving new understanding of endodontic infections. Endodontic Topics. ISSN 1601-1538. 6, p. 57–77.
• Dahle, UR; Sunde, Pia Titterud & Tronstad, Leif (2004). Reviewing Treponema. Endodontic Topics. ISSN 1601-1538. 6, p. 160–70.
• Sunde, Pia Titterud; Olsen, Ingar; Gobel, Ulf B; Theegarten, Dirk; Winter, Sachsa & Debelian, Gilberto Jirair [Show all 8 contributors for this article] (2003). Fluorescence in situ hybridization (FISH) for direct visualization of bacteria in periapical lesions of asymptomatic root-filled teeth. Microbiology (Reading). ISSN 1350-0872. 149, p. 1095–1102. Show summary

  Whether micro-organisms can live in periapical endodontic lesions of asymptomatic teeth is under debate. The aim of the present study was to visualize and identify micro-organisms within periapical lesions directly, using fluorescence in situ hybridization (FISH) in combination with epifluorescence and confocal laser scanning microscopy (CLSM). Thirty-nine periapical lesions were surgically removed, fixed, embedded in cold polymerizing resin and sectioned. The probe EUB 338, specific for the domain Bacteria, was used together with a number of species-specific 16S rRNA-directed oligonucleotide probes to identify bacteria. To control non-specific binding of EUB 338, probe NON 338 was used. Alternatively, DAPI (4',6'-diamidino-2-phenylindole) staining was applied to record prokaryotic and eukaryotic DNA in the specimens. Hybridization with NON 338 gave no signals despite background fluorescence of the tissue. The eubacterial probe showed bacteria of different morphotypes in 50 % of the lesions. Rods, spirochaetes and cocci were spread out in areas of the tissue while other parts seemed bacteria-free. Bacteria were also seen to co-aggregate inside the tissue, forming microcolonies. Porphyromonas gingivalis, Prevotella intermedia, Tannerella forsythensis and treponemes of phylogenetic Group I were detected with specific probes. In addition, colonies with Streptococcus spp. were seen in some lesions. A number of morphotypes occurred that could not be identified with the specific probes used, indicating the presence of additional bacterial species. CLSM confirmed that bacteria were located in different layers of the tissue. Accordingly, the FISH technique demonstrated mixed consortia of bacteria consisting of rods, spirochaetes and cocci in asymptomatic periapical lesions of root-filled teeth.

• Sunde, Pia Titterud; Olsen, Ingar; Debelian, Gilberto Jirair & Tronstad, Leif (2002). Microbiota of periapical lesions refractory to endodontic therapy. Journal of Endodontics. ISSN 0099-2399. 28(4), p. 304–310.
• Sunde, Pia Titterud; Tronstad, Leif; Eribe, Emenike Ribs; Lind, Petter O. & Olsen, Ingar (2000). Assessment of periradicular microbiota by DNA-DNA hybridization. Endodontics & Dental Traumatology. ISSN 0109-2502. 16, p. 191–196.
• Sunde, Pia Titterud; Olsen, Ingar; Lind, Petter O. & Tronstad, Leif (2000). Extraradicular infection: a methodological study. Endodontics & Dental Traumatology. ISSN 0109-2502. 16, p. 84–90.

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• Handal, Trude & Sunde, Pia Titterud (2023). Hvordan går det med rotfylte tenner?
• Kapralos, Vasileios; Sunde, Pia Titterud; Camilleri, Josette; Morisbak, Else; Koutroulis, Andreas & Ørstavik, Dag Solmund [Show all 7 contributors for this article] (2022). Erratum: ‘Erratum to “Effect of chlorhexidine digluconate on antimicrobial activity, cell viability and physicochemical properties of three endodontic sealers” [Dent Mater 38 (2022) 1044–1059]’, (S0109564122001014), (10.1016/j.dental.2022.04.013). Dental Materials. ISSN 0109-5641. 38(7), p. 1232–1233. doi: 10.1016/j.dental.2022.05.004.
• Haugen, Håvard Jostein; Parreiras Nogueira, Liebert & Sunde, Pia Titterud (2021). Use of novel contrast enhanced agent for tissue engineering.
• Handal, Trude & Sunde, Pia Titterud (2020). Rotresorpsjoner.
• Liskiewicz, Krystyna Anna; Sunde, Pia Titterud; Verket, Anders; Økstad, Ole Andreas & Simm, Roger (2019). C-di-GMP signaling in Treponema denticola and its role in pathogenesis of periodontal diseases.
• Liskiewicz, Krystyna Anna; Sunde, Pia Titterud; Verket, Anders; Økstad, Ole Andreas & Simm, Roger (2019). C-di-GMP signaling in Treponema denticola and its role in pathogenesis of periodontal diseases.
• Sunde, Pia Titterud (2017). Akuttbehandling, systemiske komplikasjoner Klinisk og røntgenologisk diagnostikk Kliniske rutiner, hvordan gjør vi det nå?
• Høystad, Betty Sophie; Olsen, Ingar; Marques da Silva, Rafael ; Sunde, Pia Titterud & Moen, Ketil (2007). Farlige forbindelser. [Newspaper]. Helsebladet NRK PULS. Show summary

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• Sunde, Pia Titterud; Olsen, Ingar; Enersen, Morten; Beiske, Klaus & Grinde, Bjørn (2007). Cytomegalovirus and Epstein-Barr virus in periodontitis: a role in pathology?
• Sunde, Pia Titterud; Handal, Trude; Olsen, Ingar & Caugant, Dominique A (2007). Microbial diversity in therapy resistant periapical lesions.
• Sunde, Pia Titterud (2004). Microorganisms in the periapical tissues-do they exist and if so, do they matter?
• Sunde, Pia Titterud; Olsen, Ingar; Gobel, Ulf B; Debelian, Gilberto Jirair; Tronstad, Leif & Moter, Annette (2003). Påvisning av bakterier i periapikalt vev ved hjelp av fluorescens in situ hybridisering (FISH).
• Sunde, Pia Titterud; Olsen, Ingar; Gobel, Ulf B; Debelian, Gilberto Jirair; Tronstad, Leif & Moter, A (2003). Er det bakterier i periapikale lesjoner?
• Sunde, Pia Titterud; Tronstad, Leif; Moter, Annette; Debelian, Gilberto Jirair & Olsen, Ingar (2002). Fluorescence in situ hybridization for visualization of bacteria in periapical lesions.
• Sunde, Pia Titterud; Olsen, Ingar; Eribe, Emenike Ribs; Moter, Annette & Tronstad, Leif (2001). Bacteria of asymptomatic periapical endodontic lesions identified by anaerobic cultivation and genetic methods.
• Sunde, Pia Titterud; Tronstad, Leif; Eribe, Emenike Ribs; Lind, Petter O. & Olsen, Ingar (2000). Assessment of periradicular microbiota by DNA-DNA hybridisation.
• Sunde, Pia Titterud; Tronstad, Leif; Eribe, Emenike Ribs; Lind, Petter O. & Olsen, Ingar (2000). Comparison of the microbiota in periapical lesions by culturing and genetic probe detection.
• Sunde, Pia Titterud; Olsen, Ingar; Lind, Petter O. & Tronstad, Leif (2000). Extradicular infection - a methodological study.
• Sunde, Pia Titterud (2003). Microbiota of asymptomatic periapical endodontic lesions. Universitetet i Oslo. ISSN 82-91757-23-2.

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