3Burns JA, Cahill KV. Modified kinosian dacryoeystorhiostomy: A review of 122 cases[J]. Ophthalmic Surg,1985,16(11 ) :710-716.
4Allen K, Berlin AJ. Dacryocystorhinostomy failure :association with nasolacrimal silicone intubation[J]. Ophthalmic Surg,1989,20(7) :486 -489.
5Song HY, Ahn HS, Park CK, et al. Complete obstruction of the nasolacrimal system, part II. Treatment with expandable metallic stents [ J ]. Radiology, 1993,186 ( 2 ) : 372 - 376.
6Song HY, Jin YH ,Kim. JH ,et al. Nonsurgical placement of a nasolacritual polyurethane stent[ J J. Radiology, 1995,194 ( 1 ) :233 - 237.
7Song HY ,Jin YH, Kim JH, et al. Nonsurgical placement of a nsaolacrimal polyurethane stent :long-term effectiveness [ J ]. Radiology, 1996, 200(3) :759 -763.
8Song HY,Lee DH,Ahn HS,et al. Lacrimal system obstruction treated with lacrimal polyurethane stents: outcome of removal of occluded stents[ J ]. Radiology, 1998,208 (3) :689 - 694.
