Tord Hamran

• Hamran, Tord; Cergic, Emina; Aiyar, Akila & Vandevska-Radunovic, Vaska (2022). Survey on retention procedures and use of thermoplastic retainers among orthodontists in Norway, Sweden, and Denmark. Journal of the World Federation of Orthodontists. ISSN 2212-4438. 11(4), p. 114–119. doi: 10.1016/j.ejwf.2022.05.002. Full text in Research Archive Show summary

  Background Orthodontic retention is the most important factor after successful orthodontic treatment. The use of thermoplastic retainers has increased in recent years, but information is lacking about the product materials and orthodontists’ awareness of the products they use. The aim of this survey was to map the retention protocols among Scandinavian orthodontists, particularly their use of thermoplastic retainers. Furthermore, the aim was to investigate their knowledge of thermoplastic materials and record any possible adverse effects. Methods An online questionnaire was prepared, and 667 orthodontists in Norway, Sweden, and Denmark were invited to take the survey. The survey was sent to all members of the national orthodontic associations using Nettskjema in Norway and Microsoft Forms in Sweden and Denmark. Data were collected anonymously and analyzed using chi-square and correlation coefficients. Results Of the 667 orthodontists, 432 (64%) responded (59% female). The most common retention protocol (51%) was fixed retainer in both maxilla and mandible and thermoplastic retainer in the maxilla. Two-thirds of the orthodontists were unaware of the thermoplastic material used, and 58% did not acquire knowledge of the materials. Only 1% of the respondents had registered adverse reactions to thermoplastic retainers, and none were aware of the type of material that was used. Conclusions Scandinavian orthodontists use similar retention protocols, with the most common being fixed retainer in the mandible and dual retention, fixed, and thermoplastic retainer in the maxilla. Orthodontists’ knowledge about thermoplastic materials was insufficient, but adverse effects related to thermoplastic retainer use were rare.

• Hamran, Tord & Vandevska-Radunovic, Vaska (2020). Bruk av skinner innen tannregulering. Aktuell Nordisk odontologi. ISSN 1902-3545. 45, p. 153–165. doi: 10.18261/ISSN.2058-7538-2020-01-13. Full text in Research Archive

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• Hamran, Tord; Kopperud, Hilde M.; Valen, Håkon & Vandevska-Radunovic, Vaska (2023). ORTHODONTIC THERMOPLASTIC MATERIALS; AN IN VITRO STUDY OF LEACHATES, MICRO-HARDNESS AND SIMULATED WEAR. Full text in Research Archive
• Midtbø, Marit; Hamran, Tord & Djupvik, Per Magne (2013). Long-term skeltal stability of open bite correction by combined orthodontic-surgical treatment. Full text in Research Archive
• Midtbø, Marit; Hamran, Tord & Djupvik, Per Magne (2013). Long-term skeltal stability of open bite correction by combined orthodontic-surgical treatment. European Journal of Orthodontics. ISSN 0141-5387. 35(5)(137). Full text in Research Archive

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