The efficacy of laser doppler flowmetry, electric pulp test and cold test in diagnosing revascularization of extrusively luxated immature maxillary incisors

Ersahan Ş., Sabuncuoglu F. A., Oktay E. A.

Pakistan Journal of Medical Sciences, vol.34, no.4, pp.787-793, 2018 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 34 Issue: 4
  • Publication Date: 2018
  • Doi Number: 10.12669/pjms.344.15524
  • Journal Name: Pakistan Journal of Medical Sciences
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.787-793
  • Keywords: Dental trauma, Electric pulp testing, Extrusion injury, Immature teeth, Laser Doppler Flowmetry, Pulpal blood flow, Thermal testing
  • Istanbul Medipol University Affiliated: Yes


Objective: To evaluate the effect of extrusion on immature permanent tooth PBF values during a 6-month post-trauma period and to compare the accuracy of cold tests on pulp sensibility of traumatized teeth with that of electric pulp tests (EPT). Methods: The study group comprised of 26 extruded immature maxillary incisors in 25 trauma patients. The respective contralateral homologous teeth (n=25) were included as a positive control group. Teeth in the study group were treated by repositioning and splinting. Pulp vitality readings for traumatized and control teeth were taken with LDF, EPT and cold test on the day of splint-removal (2-3 weeks after trauma– T1) as well as 6 weeks (T2), 3 months (T3) and 6 months (T4) post-trauma. Student t and Mann-Whitney U-tests were used to compare data among groups. Statistical significance was set at P < 0.05. Results: LDF gave positive vitality readings (>4.5 PU) in all patients from T1 to T4 (with the exception of 1 patient at T1). Conclusions: LDF was able to accurately identify vitality in traumatized immature teeth even during the first few weeks following trauma, whereas conventional sensibility tests were unable to accurately recognize vitality shortly after trauma.