Performation of surgical procedures anterior to ethmoid bulla can avoid risks of the other models, therefore, endoscopic frontal sinusotomy in the route anterior to ethmoid bulla is a safe model.

论通过鼻内镜对口及周围解剖观察，认为星状裂作为定解剖标志是识别口关键区域。筛泡前径路是鼻内镜下放安全入路，能避免其他径路存在某些风险。