Effects of Er:YAG Laser Irradiation on Surface Morphology and Roughness of Tooth Roots

doi:10.13701/j.cnki.kqyxyj.2016.09.018

Abstract

Abstract: Objective: To investigate effects of Er:YAG laser irradiation with different radiation energies and times on the root surface morphology and roughness. Methods: Forty-five extracted teeth due to periodontitis were collected. The tooth roots below the cemento-enamel junction were cut into small pieces (5mm×5mm×2mm). They were randomly divided into 9 groups. The first group only received SRP, and other 8 groups received different parameters Er:YAG laser irridiation after SRP. Then the mean roughness (Ra) was measured and the morphology of root surfaces was observed. Results: After SRP or SRP＋Er:YAG laser, Ra was decreased obviously (P<0.05). The Er:YAG laser increased the Ra significantly than the only scaling group (P<0.05). With the increase of pulse energy and irradiation time, the root surface roughness increased. There was no significant difference among 80mJ/pulse, 120mJ/pulse, and 160mJ/pulse. The difference between 30s and 60s groups was statistically significant (P<0.05). The root surface after SRP was smoother with smear layer. Conclusion: SRP and SRP+Er:YAG can decrease the roughness of tooth root. Er:YAG laser can remove the smear layer of root surface and leave a uniform rough surface. Root surface roughness was positively correlated with the exposure time.

Key words: Er:YAG laser, Root surface morphology, Root surface roughness

CLC Number:

R781.4

LI Jin-huan, QUE Guo-ying , LIU Zhi, DENG Jin-xia, LI Lu, SU Da, LIU Ting-ting. Effects of Er:YAG Laser Irradiation on Surface Morphology and Roughness of Tooth Roots[J]. Journal of Oral Science Research, 2016, 32(9): 964-968.

References

[1] Dibart S, Capri D, Casavecchia P, et al. Comparison of the effectiveness of scaling and root planing in vivo using hand vs rotary instruments [J]. Int J Periodontics Restorative Dent,2004,24(4)∶370-377
[2] Oliveira G J, Theodoro L H, Marcantonio J E, et al. Effect of Er,Cr:YSGG and Er:YAG laser irradiation on the adhesion of blood components on the root surface and on root morphology [J]. Braz Oral Res,2012,26(3)∶256-262
[3] Feist I S, De Micheli G, Carneiro S R, et al. Adhesion and growth of cultured human gingival fibroblasts on periodontally involved root surfaces treated by Er:YAG laser [J]. J Periodontol,2003,74(9)∶1368-1375
[4] Kishida M, Sato S, Ito K. Effects of a new ultrasonic scaler on fibroblast attachment to root surfaces: a scanning electron microscopy analysis [J]. J Periodontal Res,2004,39(2)∶111-119
[5] Amid R, Kadkhodazadeh M, Fekrazad R, et al. Comparison of the effect of hand instruments, an ultrasonic scaler, and an erbium-doped yttrium aluminium garnet laser on root surface roughness of teeth with periodontitis: a profilometer study [J]. J Periodontal Implant Sci,2013,43(2)∶101-105
[6] Bolortuya G, Ebihara A, Ichinose S, et al. Effects of dentin surface modifications treated with Er:YAG and Nd:YAG laser irradiation on fibroblast cell adhesion [J]. Photomed Laser Surg,2012,30(2)∶63-70
[7] Ota-Tsuzuki C, Martins FL, Giorgetti AP, et al. In vitro adhesion of Streptococcus sanguinis to dentine root surface after treatment with Er:YAG laser, ultrasonic system, or manual curette [J]. Photomed Laser Surg,2009,27(5)∶735-741
[8] Folwaczny M, George G, Thiele L, et al. Root surface roughness following Er:YAG laser irradiation at different radiation energies and working tip angulations [J]. J Clin Periodontol,2002,29(7)∶598-603
[9] Theodoro LH, Zezell DM, Garcia VG, et al. Comparative analysis of root surface smear layer removal by different etching modalities or erbium: yttrium- aluminum-garnet laser irradiation. A scanning electron microscopy study [J]. Lasers Med Sci,2010,25(4)∶485-491
[10] Almehdi A, Aoki A, Ichinose S, et al. Histological and SEM analysis of root cementum following irradiation with Er:YAG and CO₂ lasers [J]. Lasers Med Sci,2013,28(1)∶203-213
[11] Gomez C, Bisheimer M, Costela A, et al. Evaluation of the effects of Er:YAG and Nd:YAG lasers and ultrasonic instrumentation on root surfaces [J]. Photomed Laser Surg,2009,27(1)∶43-48
[12] Gaspirc B, Skaleric U. Morphology, chemical structure and diffusion processes of root surface after Er:YAG and Nd:YAG laser irradiation [J]. J Clin Periodontol,2001,28(6)∶508-516
[13] 蒋春梅,朱庆萍,马骏驰,等.Er:YAG激光牙周治疗对根表面形态的影响[J].口腔生物医学,2010,1(2)∶96-97
[14] Cekici A, Maden I, Yildiz S, et al. Evaluation of blood cell attachment on Er: YAG laser applied root surface using scanning electron microscopy [J]. Int J Med Sci,2013,10(5)∶560-566
[15] Bolortuya G, Ebihara A, Ichinose S, et al. Initial fibroblast attachment to Erbium:YAG laser-irradiated dentine [J]. Int Endod J,2011,44(12)∶1134-1144
[16] Cekici A, Maden I, Yildiz S, et al. Evaluation of blood cell attachment on Er: YAG laser applied root surface using scanning electron microscopy [J]. Int J Med Sci,2013,10(5)∶560-566
[17] Teughels W, Van Assche N, Sliepen I, et al. Effect of material characteristics and/or surface topography on biofilm development [J]. Clin Oral Implants Res, 2006,17(2)∶68-81