Methods 50 cases(70 sides)who underwent tran- nasal endoscopic frontal surgey for chronic frontal sinusitis were divided into two groups randomly.
方法慢性额窦炎行功能性鼻内镜额窦手术患者50例（70侧）。
Methods 50 cases(70 sides)who underwent tran- nasal endoscopic frontal surgey for chronic frontal sinusitis were divided into two groups randomly.
方法慢性额窦炎行功能性鼻内镜额窦手术患者50例（70侧）。
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