Margareth Kristensen Ottersen

• Ottersen, Margareth Kristensen; Larheim, Tore Arne; Hove, Lene Hystad & Arvidsson, Linda Zamoline (2023). Imaging signs of temporomandibular joint osteoarthritis in an urban population of 65-year-olds: A cone beam computed tomography study. Journal of Oral Rehabilitation. ISSN 0305-182X. doi: 10.1111/joor.13547. Full text in Research Archive
• 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. Full text in Research Archive
• Ottersen, Margareth Kristensen; Abrahamsson, Anna-Karin; Larheim, Tore & Arvidsson, Linda Zamoline (2019). CBCT characteristics and interpretation challenges of temporomandibular joint osteoarthritis in a hand osteoarthritis cohort. Dentomaxillofacial Radiology. ISSN 0250-832X. 48(4). doi: 10.1259/dmfr.20180245. Full text in Research Archive Show summary

  OBJECTIVES: To characterise osteoarthritis (OA) in the temporomandibular joints (TMJs) by means of cone beam CT in a hand OA population, and identify interpretation challenges. METHODS: The TMJs of 54 individuals (mean age 71.3) recruited from the “The Oslo hand OA cohort”, independently of TMJ-related symptoms, were examined with cone beam CT (ProMax MidCBCT). Images were analysed for bone change characteristics and each joint was diagnosed with either OA, no OA or as indeterminate for OA. The image analysis criteria developed for the Research Diagnostic Criteria for Temporomandibular Disorders were used. Frequencies of bone changes, joint diagnoses and severity grades (1–2) were calculated, as well as κ values for observer agreement. RESULTS: In the OA joints, the most frequent bone changes occurred in the condyle: flattening (79%), osteophyte (72%) and subcortical sclerosis (70%). The most frequent changes in the fossa/eminence were flattening (57%), erosion (49%) and subcortical sclerosis (47%). 53 (49%) of the 108 joints were diagnosed with TMJ OA (68 % Grade 2), 29 joints (27%) with no OA, and 26 joints (24%) were indeterminate for OA. Inter- and intraobserver agreement showed mean κ values of 0.67 and 0.62, respectively. CONCLUSIONS: TMJ changes were common in elderly with hand OA and characterised by bone productive changes. The radiologic features indicated a late stage TMJ OA. Interpretation challenges related to subtle changes were identified and are reflected by the rather low observer agreement. The diagnosis of TMJ OA should be based on evident and clear abnormalities only.

• Larheim, Tore Arne; Hol, Caroline; Ottersen, Margareth Kristensen; Knutsen, Bjørn Mork & Arvidsson, Linda Zamoline (2018). The role of imaging in the diagnosis of temporomandibular joint pathology. Oral and Maxillofacial Surgery Clinics of North America. ISSN 1042-3699. 30(3), p. 239–249. doi: 10.1016/j.coms.2018.04.001. Full text in Research Archive
• Johansen, Anna Karin; Ottersen, Margareth Kristensen; Arvidsson, Linda Zamoline; Kvien, Tore Kristian; Larheim, Tore Arne & Haugen, Ida Kristin (2017). Frequency of temporomandibular joint osteoarthritis and related symptoms in a hand osteoarthritis cohort. Osteoarthritis and Cartilage. ISSN 1063-4584. 25(5), p. 654–657. doi: 10.1016/j.joca.2016.12.028. Full text in Research Archive Show summary

  Objective: The prevalence of osteoarthritis (OA) in the temporomandibular joints (TMJs) in hand OA patients is largely unknown. Our aims were to explore (1) The frequency of TMJ-related symptoms and clinical findings; (2) The TMJ OA frequency defined by cone beam computed tomography (CBCT); and (3) The relationship between TMJ-related symptoms/clinical findings and CBCT-defined TMJ OA, in a hand OA cohort. Methods: We calculated the frequencies of TMJ-related symptoms, clinical findings and diagnosis of TMJ OA by CBCT and clinical examination in 54 patients from the Oslo hand OA cohort (88% women, mean (range) age 71 (61–83) years). Participants with and without CBCT-defined TMJ OA were compared for differences in proportions (95% confidence interval (CI)) of symptoms and clinical findings. Sensitivity and specificity of the clinical TMJ OA diagnosis were calculated using CBCT as reference. Results: Self-reported symptoms and clinical findings were found in 24 (44%) and 50 (93%) individuals (93%), respectively, whereas 7 (13%) had sought healthcare. Individuals with CBCT-defined TMJ OA (n = 36, 67%) reported statistically significantly more pain at mouth opening (22%, 95% CI 4–40%), clicking (33%, 95% CI 14–52%) and crepitus (25%, 95% CI 4–46%). By clinical examination, only crepitus was more common in TMJ OA (33%, 95% CI 29–77%). Clinical diagnosis demonstrated low sensitivity (0.42) and high specificity (0.93). Conclusions: CBCT-defined TMJ OA was common in hand OA patients, suggesting that TMJ OA may be part of generalized OA. Few had sought healthcare, despite high burden of TMJ-related symptoms/findings. Clinical examination underestimated TMJ OA frequency.

• Larheim, Tore Arne; Abrahamsson, Anna-Karin; Kristensen, Margareth & Arvidsson, Linda Zamoline (2014). Temporomandibular joint diagnostics using CBCT. Dentomaxillofacial Radiology. ISSN 0250-832X. 44(1). doi: 10.1259/dmfr.20140235. Full text in Research Archive

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• Arvidsson, Linda Zamoline; Knutsen, Bjørn Mork; Hol, Caroline; Abrahamsson, Anna-Karin; Ottersen, Margareth Kristensen & Larheim, Tore (2019). High-Grade Inflammatory TMJ Diseases and Traumatic TMJ Conditions. Springer Nature. ISBN 9783319994680. 15 p. Full text in Research Archive
• Arvidsson, Linda Zamoline; Knutsen, Bjørn Mork; Hol, Caroline; Abrahamsson, Anna-Karin; Ottersen, Margareth Kristensen & Larheim, Tore (2019). Other Pathologic Conditions of the TMJ. Springer Nature. ISBN 9783319994680. 10 p. Full text in Research Archive
• Larheim, Tore; Knutsen, Bjørn Mork; Hol, Caroline; Abrahamsson, Anna-Karin; Ottersen, Margareth Kristensen & Arvidsson, Linda Zamoline (2019). TMJ Disc Disorders and Osteoarthritis. Springer Nature. ISBN 9783319994680. 19 p. Full text in Research Archive

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• Larheim, Tore Arne; Arvidsson, Linda Zamoline; Ottersen, Margareth Kristensen; Abrahamsson, Anna-Karin & Hol, Caroline (2018). Radiologisk utredning. In Julsvoll, Elisabeth Heggem (Eds.), Temporomandibulær dysfunksjon: Teori, undersøkelse og behandling. Cappelen Damm Akademisk. ISSN 9788202557799. p. 148–160. Full text in Research Archive

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