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Atomic analysis and hardness measurement of the cavity prepared by laser

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Abstract

The purpose of this study was to compare the compositional changes and microhardness of the cavity floor prepared by erbium, chromium:yttrium–scandium–gallium–garnet (Er,Cr:YSGG) laser irradiation with those of the conventional bur-prepared cavity. A total of 16 extracted human molar teeth (with no carious lesions or repairs) were selected for this study. On the buccal and lingual (palatal) surfaces of each tooth, cavities (diameter 3 mm, depth 2 mm) were prepared with an Er,Cr:YSGG laser system (Waterlase MDTM, USA) and high-speed turbine. The cavities were cross-sectioned and subjected to atomic analysis by scanning electron microscopy–energy dispersive X-ray spectrometry (SEM-EDX) and Vickers hardness test. Statistical analyses were performed with t-tests. Surface characteristics of the prepared cavities were also investigated by SEM. No significant differences were found between the calcium/phosphorus (Ca/P) ratio and Vickers hardness of laser- and bur-prepared cavities. The SEM observation revealed that the lased cavity surface was irregular, and there was also an absence of smear layer; the orifices of dentinal tubules were exposed. Microhardness measurement of the cavity floor confirmed that the Er,Cr:YSGG laser produced a clean-cut surface of the cavity.

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References

  1. Wigdor HA, Walsh JT Jr, Featherstone JD, Visuri SR, Fried D, Waldvogel JL (1995) Laser in dentistry. Lasers Surg Med 16:103–133. doi:10.1002/lsm.1900160202

    Article  CAS  PubMed  Google Scholar 

  2. Hibst R, Keller U (1989) Experimental studies of the application of the Er:YAG laser on dental hard substances, I. Measurement of the ablation rate. Lasers Surg Med 9:338–344. doi:10.1002/lsm.1900090406

    Article  CAS  PubMed  Google Scholar 

  3. Keller U, Hibst R (1989) Experimental studies of the application of the Er:YAG laser on dental hard substances, II. Light microscopic and SEM investigations. Lasers Surg Med 9:345–351. doi:10.1002/lsm.1900090406

    Article  CAS  PubMed  Google Scholar 

  4. Hossain M, Nakamura Y, Yamada Y, Kimura Y, Matsumuto N, Matsomuto K (1999) Ablation depths and morphological changes in human enamel and dentin after Er:YAG laser irradiation with or without water mist. J Clin Laser Med Surg 17:105–109

    CAS  PubMed  Google Scholar 

  5. Burkes EJ Jr, Hoke J, Gomes E, Wolbarsht M (1992) Wet versus dry enamel ablation by Er:YAG laser. J Prosthet Dent 67(6):847–851. doi:10.1016/0022-3913(92)90599-6

    Article  PubMed  Google Scholar 

  6. Visuri SR, Walsh JT Jr, Wigdor HA (1996) Erbium laser ablation of dental hard tissue: effect of water cooling. Lasers Surg Med 18:294–300. doi:10.1002/(SICI)1096-9101(1996)18:3<294::AID-LSM11>3.0.CO;2-6

    Article  CAS  PubMed  Google Scholar 

  7. Sonntag KD, Klitzman B, Burkes EJ, Hoke J, Moshonov J (1996) Pulpal response to cavity preparation with the Er:YAG and Mark III free electron lasers. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 81:695–702. doi:10.1016/S1079-2104(96)80076-X

    Article  CAS  PubMed  Google Scholar 

  8. Eversole LR, Rizoiu IM (1995) Preliminary investigations on the utility of an Er, Cr:YSGG laser. J Clin Dent Assoc 23:41–47

    CAS  Google Scholar 

  9. Hossain M, Nakamura Y, Yamada Y, Kimura Y, Matsumuto N, Matsomuto K (1999) Effects of Er, Cr:YSGG laser irradiation in human enamel and dentine: ablation and morphological studies. J Clin Laser Med Surg 17:155–159

    CAS  PubMed  Google Scholar 

  10. Eversole LR, Rizoiu I, Kimmel AI (1997) Pulpal response to cavity preparation by an Er, Cr:YSGG laser powered hydrokinetic system. J Am Dent Assoc 128:1099–1106

    CAS  PubMed  Google Scholar 

  11. Rizoiu I, Kohanghadosh F, Kimmel AL, Eversole IR (1998) Pulpal thermal responses to an erbium,chromium: YSGG pulsed laser hydrokinetic system. Oral Surg Oral Med Oral Pathol Oral Radiol Endo 86:220–223

    Article  CAS  Google Scholar 

  12. Aoki A, Ishikawa I, Yamada T, Otsuki M, Watanabe H, Tagami J, Ando Y, Yamamoto H (1998) Comparison between Er:YAG laser and conventional technique for root caries treatment in vitro. J Dent Res 77:1404–1414. doi:10.1177/00220345980770060501

    Article  CAS  PubMed  Google Scholar 

  13. Li ZZ, Code JE, Van de Merwe WP (1992) Er:YAG laser ablation of enamel and dentin of human teeth: determination of ablation rates at various fluence and pulse repetition rates. Lasers Surg Med 12:625–630. doi:10.1002/lsm.1900120610

    Article  CAS  PubMed  Google Scholar 

  14. Zach L, Cohen G (1965) Pulp response to externally applied heat. Oral Surg Oral Med Oral Pathol 19:515–530. doi:10.1016/0030-4220(65)90015-0

    Article  CAS  PubMed  Google Scholar 

  15. Eversole LR, Rizoiu I, Kimmel AI (1997) Pulpal response to cavity preparation by an Er, Cr:YSGG laser powered hydrokinetic system. J Am Dent Assoc 128:1099–1106

    CAS  PubMed  Google Scholar 

  16. Hadley J, Younge DA, Eversole LR, Gornvein JA (2000) A laser-powered hydrokinetic system for caries removal and cavity preparation. J Am Dent Assoc 131:777–785

    CAS  PubMed  Google Scholar 

  17. Rohanizadeh R, LeGeros RZ, Fan D, Jean A, Daculsi G (1999) Ultrastructural properties of laser-irradiated and heat-treated dentin. J Dent Res 78):1829–1835. doi:10.1177/00220345990780121001

    Article  CAS  PubMed  Google Scholar 

  18. Marquez F, Quitana E, Roca I, Salgado J (1993) Physical-mechanical effects of Nd:YAG laser of sound dentin and enamel. Biomaterials 14:313–316. doi:10.1016/0142-9612(93)90124-K

    Article  CAS  PubMed  Google Scholar 

  19. Konishi N, Fried D, Staninec M, Featherstone JD (1999) Artificial caries removal and inhibition of artificial secondary caries by pulsed CO2 laser irradiation. Am J Dent 12:213–216

    CAS  PubMed  Google Scholar 

  20. Kuramoto M, Matson E, Turbino ML, Marques RA (2001) Microhardness of Nd:YAG laser irradiated enamel surfaces. Braz Dent J 12(1):31–33

    Google Scholar 

  21. Frentzen M, Koort HJ (1990) Lasers in dentistry: new possibilities with advancing laser technology. Int Dent J 40:323–332

    CAS  PubMed  Google Scholar 

  22. Wigdor H, ABT E, Ashrafi S, Walsh JT (1993) The effect of laser on dental hard tissues. J Am Dent Assoc 124:65–70

    CAS  PubMed  Google Scholar 

  23. Israel M, Cobb CM, Rossmann JA, Spencer P (1997) The effect of CO2, Nd:YAG and Er:YAG lasers with and without surface coolant on tooth root surfaces: an in vitro study. J Clin Periodontol 24:595–600. doi:10.1111/j.1600-051X.1997.tb00235.x

    Article  CAS  PubMed  Google Scholar 

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  1. School of Dentistry/Laser Research Center, Research Center for Science and Technology In Medicine, Tehran, Iran

    Sima Shahabi & Somaeh Zendedel

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  1. Sima Shahabi
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  2. Somaeh Zendedel
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Correspondence to Sima Shahabi.

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Shahabi, S., Zendedel, S. Atomic analysis and hardness measurement of the cavity prepared by laser. Lasers Med Sci 25, 379–383 (2010). https://doi.org/10.1007/s10103-009-0692-1

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  • DOI: https://doi.org/10.1007/s10103-009-0692-1

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