Blar i forfatter "Örtengren, Ulf"

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    • Light-curing units used in dentistry: Effect of their characteristics on temperature development in teeth 

      Mouhat, Mathieu; Stangvaltaite-Mouhat, Lina; Mercer, James; Nilsen, Bo Wold; Örtengren, Ulf (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-25)
      This study aimed to investigate pulp chamber and surface temperature development using different LED light curing units (LCUs). Eight brands of LED-LCUs were tested in a laboratory bench model. The pulp chamber and surface temperature were recorded with a type T thermocouple and infrared cameras, respectively. The highest pulp chamber and surface temperature increase was 6.1±0.3°C and 20.1±1.7°C, ...

    • Nytt regelverk för medicintekniska produkter i tandvården 

      Örtengren, Ulf; Hensten, Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-10-07)
      Den 26 maj började det nya direktivet för medicintekniska produkter inom tandvården att gälla fullt ut. Fokus ligger främst på krav på uppdaterad dokumentation och riskanalys samt förbättrad spårbarhet.

    • Surface properties of dental zirconia ceramics affected by ultrasonic scaling and low-temperature degradation 

      Nakazawa, Kosuke; Nakamura, Keisuke; Harada, Akio; Shirato, Midori; Inagaki, Ryoichi; Örtengren, Ulf; Kanno, Taro; Niwano, Yoshimi; Egusa, Hiroshi (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-09-13)
      Zirconia (3Y-TZP) dental prostheses are widely used in clinical dentistry. However, the effect of ultrasonic scaling performed as a part of professional tooth cleaning on 3Y-TZP dental prostheses, especially in conjunction with low-temperature degradation (LTD), has not been fully investigated. The present study aimed to evaluate the influence of ultrasonic scaling and LTD on the surface properties ...