| Nd：YAG激光照射对兔面神经损伤的实验研究 |
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| 引用本文： | 余优成 张志愿. Nd：YAG激光照射对兔面神经损伤的实验研究[J]. 上海口腔医学, 1999, 8(4): 197-199 |
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| 作者姓名： | 余优成 张志愿 |
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| 作者单位： | 上海医科大学中山医院口腔科!上海200032(余优成),上海第二医科大学口腔医学院口腔颌面外科教研室!上海200011(张志愿,周国瑜,竺涵光),上海第二医科大学口腔医学院口腔颌面外科教研室!上海(马继壮) |
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| 摘 要： | 目的探讨不同能量密度Nd：YAG连续激光对兔面神经的损伤效应及术后再生情况,为Nd：YAG激光治疗腮腺区深部海绵型血管瘤提供依据。方法根据临床治疗功率,采用5种不同能量密度Nd：YAG激光,分别对28只兔面神经进行照射。结果能量密度＜70J／cm2激光致面神经轻度变性,术后3周功能基本正常;能量密度140J／cm2激光致面神经中度变性;术后3周功能明显下降,6周基本恢复正常;能量密度240J／cm2激光致面神经不可逆损伤。结论Nd：YAG激光的热效应是面神经损伤的重要原因,且程度与能量呈正相关。
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| 关 键 词： | 掺钕钇铝石榴石激光 能量密度 面神经 损伤 |
Rabbit facial nerve damager after Nd: YAG laser irradiation: an experimental study |
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| Yu You-cheng,ZHANG Zhi-yuan, ZHOU Guo-yu,et al.. Rabbit facial nerve damager after Nd: YAG laser irradiation: an experimental study[J]. Shanghai journal of stomatology, 1999, 8(4): 197-199 |
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| Authors: | Yu You-cheng ZHANG Zhi-yuan ZHOU Guo-yu et al. |
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| Affiliation: | Department of Oral and Maxillofacial, School of Stomatlolgy, Shanghai Second Medical University. Shanghai 200011, China. |
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| Abstract: | Objective To investigate the damage effects of rabbit facial nerve after Nd: YAG laser irradiation. Methods According to therapeutic laser energy density, the facial nerves of 28 rabbits were irradiated by Nd: YAG laser with 5 different laser dosages. Results The facial nerves were functionally intact with mild degeneration histologically at three weeks postoperatively,when the energy density of Nd:YAG laser 10wer than 70J/cm2. In the group with energy density of 140J/cm2, facial nerve functionally impaired with moderate degeneration which rehabilitated within six weeks. While the laser power increased to more than 240J/cm2,irreversible nerve damages happened. Conclusion Laser thermal effect is the main cause of nerve damage,there is a positive correlation between laser dosage and nerve impairment |
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| Keywords: | Nd: YAG laser energy density facial nerve injury |
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