1、Osteal stenosis at frontal sinus orifice in 21 cases.
額竇自然開口狹窄者21側(cè)（9·4%）。

2、Objective To explore the clinical characteristic and surgery method for frontal sinus osteoma.
目的探討額竇骨瘤的臨床特點(diǎn)和手術(shù)方法。

3、We describe a frontal sinus stent which is cheap, easily produced and effective.
我們描述一種有效的額竇斯滕特固定模，該模價(jià)格便宜，易于制造。

4、Two kinds of buffalos' frontal sinus are the thin-shell constitution as an arch bridge.
兩種類型水牛額竇內(nèi)部都呈拱橋式薄殼結(jié)構(gòu)。