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首页> 外文期刊>The International journal of oral & maxillofacial implants >Histologic and Resonance Frequency Analysis of Peri-Implant Bone Healing After Low-Level Laser Therapy: An In Vivo Study
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Histologic and Resonance Frequency Analysis of Peri-Implant Bone Healing After Low-Level Laser Therapy: An In Vivo Study

机译：低水平激光治疗后种植体骨愈合的组织学和共振频率分析：一项体内研究

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Purpose: To evaluate the effects of low-level laser therapy (LLLT) on peri-implant bone regeneration by means of resonance frequency analysis and histologic analysis of bone-to-implant contact (BIC). Materials and Methods: Thirty-two male New Zealand rabbits were randomly divided into four groups of eight animals each, one control group (nonirradiated animals) and three experimental groups that received LLLT (group E5 = 5 J per session; group E10 = 10 J per session; group E20 = 20 J per session). The mandibular left incisor was surgically extracted in all animals, and a nanoparticle-treated-surface osseointegrated implant was placed immediately afterward. The experimental groups were irradiated with aluminum-gallium-arsenide laser diode every 48 hours over a 13-day period for a total of seven sessions. Implant stability quotients (ISQs) were measured at the time of implant placement and 30 days after the last LLLT session. The animals were then euthanized and dissected, and histologic slides of the implant region were obtained for BIC evaluation. Results: Significant differences in ISQ were detected between groups before and after LLLT, with group E20 showing significantly higher values than controls. The percentage of BIC was also significantly higher in group E20 than in control animals. Conclusion: Laser therapy at a dose of 20 J per treatment session, based on the irradiation protocol used in this study, was able to significantly increase ISQ values and BIC after implant placement, indicating that laser irradiation effected an improvement in peri-implant bone healing.
机译：目的：通过共振频率分析和骨与植入物接触（BIC）的组织学分析，评估低水平激光疗法（LLLT）对植入物周围骨再生的影响。材料和方法：将32只新西兰大白兔随机分为四组，每组八只动物，一个对照组（未辐照的动物）和三个接受LLLT的实验组（E5组=每次疗程5 J; E10 = 10 J组）每次会话;组E20 =每次会话20 J）。在所有动物中，通过手术取出下颌左切牙，然后立即放置经纳米颗粒处理的表面骨整合植入物。实验组在13天的时间内每48小时用铝镓砷化物激光二极管照射7次。在植入物放置时以及上次LLLT疗程后30天测量植入物稳定性商（ISQ）。然后对动物实施安乐死并解剖，并获得植入物区域的组织学切片以进行BIC评估。结果：LLLT前后各组之间的ISQ有显着差异，E20组的值明显高于对照组。 E20组的BIC百分比也显着高于对照组动物。结论：根据本研究中使用的照射方案，每次治疗疗程以20 J的剂量进行激光治疗能够显着提高植入物放置后的ISQ值和BIC，这表明激光照射可改善植入物周围骨的愈合。

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