Lasers in Medical Science

, Volume 30, Issue 7, pp 1815–1822 | Cite as

Low-level laser therapy as an alternative for pulpotomy in human primary teeth

  • Nádia Carolina Teixeira Marques
  • Natalino Lourenço Neto
  • Camila de Oliveira Rodini
  • Ana Paula Fernandes
  • Vivien Thiemy Sakai
  • Maria Aparecida Andrade Moreira Machado
  • Thais Marchini Oliveira
Original Article

Abstract

This study aimed to evaluate the effects of low-level laser therapy (LLLT) on pulpal response of primary teeth. Twenty mandibular primary molars were randomly divided into the following groups: group I Buckley’s formocresol (diluted at 1:5), group II calcium hydroxide, group III LLLT + zinc oxide/eugenol, and group IV LLLT + calcium hydroxide. LLLT parameters were set at 660-nm wavelength, 10-mW power output, and 2.5 J/cm2 energy density for 10 s in continuous mode (InGaAlP laser, Twin Laser®, MMOptics, Sao Carlos, Sao Paulo, Brazil). The teeth were extracted at the regular exfoliation period. The dentin-pulp complex was graded by an established histopathological score system. Statistical analysis was performed by Kruskal-Wallis and chi-square test. The histopathological assessment revealed statistically significant differences among groups (P < 0.05). The lowest degree of pulpal inflammation was present in LLLT + calcium hydroxide (P = 0.0296). Calcium hydroxide showed the highest rate of hard tissue barrier (P = 0.0033), odontoblastic layer (P = 0.0033), and dense collagen fibers (P = 0.0095). On the other hand, formocresol showed the highest incidence of internal resorption (P = 0.0142). Based on this study, low-level laser therapy preceding the use of calcium hydroxide exhibited satisfactory results on pulp tissue healing. However, further clinical studies on human teeth with long-term follow-up are needed to test the low-level laser therapy efficacy.

Keywords

Tooth deciduous Calcium hydroxide Laser therapy low level Pulpotomy Dental pulp 

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Copyright information

© Springer-Verlag London 2014

Authors and Affiliations

  • Nádia Carolina Teixeira Marques
    • 1
  • Natalino Lourenço Neto
    • 1
  • Camila de Oliveira Rodini
    • 2
  • Ana Paula Fernandes
    • 1
  • Vivien Thiemy Sakai
    • 3
  • Maria Aparecida Andrade Moreira Machado
    • 1
  • Thais Marchini Oliveira
    • 1
  1. 1.Department of Pediatric Dentistry, Orthodontics and Public HealthBauru School of Dentistry - University of São PauloBauruBrazil
  2. 2.Department of Biology ScienceBauru School of Dentistry - University of São PauloBauruBrazil
  3. 3.Department of Clinics and SurgeryFederal University of AlfenasAlfenasBrazil

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