[1] [1] HOLTFRETER B, ALBANDAR J M, DIETRICH T, et al.Standards for reporting chronic periodontitis prevalence and severity in epidemiologic studies［J］.Journal of Clinical Periodontology, 2015, 42(5): 407-412.

[2] [2] NASCIMENTO G G, LEITE F R M, SCHEUTZ F, et al.Periodontitis: from infection to inflammation［J］.Current Oral Health Reports, 2017, 4(4): 301-308.

[3] [3] TELES R P, HAFFAJEE A D, SOCRANSKY S S.Microbiological goalsof periodontal therapy［J］.Periodontology, 2006(42): 180-218.

[4] [4] VAN DER WEIJDEN G A, TIMMERMAN M F.A systematic review on the clinical efficacy of subgingival debridement in the treatment of chronic periodontitis［J］.Journal of Clinical Periodontology, 2002, 29(S3): 55-71.

[5] [5] GRAZIANI F, KARAPETSA D, ALONSO B, et al.Nonsurgicalandsurgical treatment of periodontitis: how many options for one disease ［J］Periodontol, 2017, 75(1): 152-188.

[6] [6] AOKI A, ANDO Y, WATANABE H, et al.In vitro studies on laser scaling of subgingival calculus with an erbium:YAG laser［J］.Journal of Periodontology, 1994, 65(12): 1097-1106.

[7] [7] AOKI A, MIURA M, AKIYAMA F, et al.In vitro evaluation of Er:YAG laser scaling of subgingival calculus in comparison with ultrasonic scaling［J］.Journal of Periodontal Research, 2000, 35(5): 266-277.

[8] [8] YANEVA B K, ZAGORCHEV P I, FIRKOVA E I, et al.In vitro study of temperature changes in pulp chamber during root planing procedure using Er:YAG laser［J］.Folia Medica, 2016, 58(3): 206-210.

[9] [9] 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］.International Journal of Medical Sciences, 2013, 10(5): 560-566.

[10] [10] THEODORO L H, ZEZELL D M, GARCIA V G, 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 in Medical Science, 2010, 25(4): 485-491.

[11] [11] TALEBI-ARDAKANI M R, TORSHABI M, KARAMI E, et al.Comparison of Er:YAG laser and hand instrumentation on the attachment of cultured human gingival fibroblasts to periodontally involved root surfaces［J］.Journal of Lasers in Medical Sciences, 2017, 8(S1): 51-55.

[12] [12] AMID R, GHOLAMI G A, MOJAHEDI M, et al.Effects of root debridement with hand curettes and Er:YAG laser on chemical properties and ultrastructure of periodontally-diseased root surfaces using spectroscopy and scanning electron microscopy［J］.Journal of Lasers in Medical Sciences, 2017, 8(2): 66-71.

[13] [13] BADRAN Z, BOUTIGNY H, STRUILLOU X, et al.Clinical outcomes after nonsurgical periodontal therapy with an Er:YAG laser device: a randomized controlled pilot study［J］.Photomedicine and Laser Surgery, 2012, 30(7): 347-353.

[14] [14] FENG XIANGHUI, LU RUIFANG, HE LU.A short-term clinical evaluation of periodontal treatment with an Er:YAG laser for patients with chronic periodontitis: a split-mouth controlled study［J］.Journal of Peking University (Health Sciences), 2011, 43(6): 886-890.

[15] [15] GRZECH-LESNIAK K, SCULEAN A, GASPIRC B.Laser reduction of specific microorganisms in the periodontal pocket using Er:YAG and Nd:YAG lasers: a randomized controlled clinical study［J］.Lasers in Medical Science, 2018, 33(7): 1461-1470.

[16] [16] GRZECH-LESNIAK K, MATYS J, DOMINIAK M.Comparison of the clinical and microbiological effects of antibiotic therapy in periodontal pockets following laser treatment An in vivo study［J］.Journal of Investigative and Clinical Dentistry, 2018, 19(1): 201.

[17] [17] LOPES B M V, THEODORO L H, MELO R F, et al.Clinical and microbiologic follow-up evaluations after non-surgical periodontal treatment with erbium:YAG Laser and scaling and root planing［J］.Journal of Periodontology, 2010, 81(5): 682-691.

[18] [18] ROTUNDO R, NIERI M, CAIRO F, et al.Lack of adjunctive benefit of Er:YAG laser in non-surgical periodontal treatment: a randomized split-mouth clinical trial［J］.Journal of Clinical Periodontology, 2010, 37(6): 526-533.

[19] [19] SCHWARZ F, SCULEAN A, GEORG T, et al.Periodontal treatment with an Er:YAG laser compared to scaling and root planing.A controlled clinical study［J］.Journal of Periodontology, 2001, 72(3): 361-367.

[20] [20] SOO L, LEICHTER J W, WINDLE J, et al.A comparison of Er:YAG laser and mechanical debridement for the non-surgical treatment of chronic periodontitis: a randomized, prospective clinical study［J］.Journal of Clinical Periodontology, 2012, 39(6): 537-545.

[23] [23] YASUTAKA KOMATSU, TOSHIYA MOROZUMI, DAISUKE ABE, et al.Effects of erbium-doped: yttrium aluminum garnet (Er:YAG) laser on bacteremia due to scaling and root planing［J］.Journal of Lasers in Medical Sciences, 2012, 3(4): 175-184.