CROSS REFERENCE TO RELATED APPLICATION This application is a continuation-in-part of U.S. Ser. No. 09/604,563, filed Jun. 27, 2000, which claims priority to provisional application 60/141,927 filed Jul. 1, 1999. The disclosure of which is hereby incorporated by reference.

This application is a provision of U.S. Ser. No. 60/001,723, filed Jul. 28, 1995.

This is a continuation of Ser. No. 08/700,237, filed Aug. 20, 1996, which is a divisional of U.S. Ser. No. 08/468,364, filed Jun. 6, 1995, now U.S. Pat. No. 5,567,435, which is a divisional of U.S. Ser. No. 08/379,848, filed on Jan. 27, 1995, now U.S. Pat. No. 5,626,863, which is a divisional of U.S. Ser. No. 08/022,687, filed Mar. 1, 1993, now U.S. Pat. No. 5,410,016, which is a continuation-in-part of U.S. Ser. No. 07/843,485, filed on Feb. 28, 1992, now abandoned.

REFERENCE TO RELATED APPLICATIONS This application is a continuation-in-part of U.S. patent application Ser. Nos. 08/465,358, 08/462,164 and 08/461,716, filed Jun. 5, 1995, now U.S. Pat. Nos. 5,650,446, 5,631,300 and 5,668,185, respectively, each of which is a continuation-in-part of: U.S. patent application Ser. No. 08/192,499, filed Feb. 3, 1994, now abandoned, which is a divisional of U.S. patent application Ser. No. 08/017,657, filed Feb. 12, 1993, now U.S. Pat. No. 5,360,609; U.S. patent application Ser. No. 08/192,498, filed Feb. 3, 1994, now abandoned, which is a divisional of U.S. patent application Ser. No. 08/017,657, filed Feb. 12, 1993, now U.S. Pat. No. 5,360,609; and U.S. patent application Ser. No. 08/228,671, filed Apr. 18, 1994, now abandoned, which is a divisional of U.S. patent application Ser. No. 08/016,904, filed Feb. 12, 1993, now abandoned. This application is also a continuation-in-part of U.S. patent application Ser. No. 08/462,039, filed Jun. 5, 1995, now abandoned, and Ser. No. 08/461,304, filed Jun. 5, 1995, now U.S. Pat. No. 5,705,092. This application is also a continuation-in-part of U.S. patent application Ser. No. 08/726,413, filed Oct. 3, 1996, now U.S. Pat. No. 5,639,295, which is a continuation of U.S. patent application Ser. No. 08/461,706, filed Jun. 5, 1995, now abandoned. This application is also a continuation-in-part of U.S. patent application Ser. No. 08/724,907, filed Oct. 3, 1996, which is a continuation of U.S. patent application Ser. No. 08/465,087, filed Jun. 5, 1995, now abandoned. This application is also a continuation-in-part of U.S. patent application Ser. No. 08/682,318, filed Jul. 17, 1996, now U.S. Pat. No. 5,695,814, which is a divisional of U.S. patent application Ser. No. 08/465,086, filed Jun. 5, 1995, now U.S. Pat. No. 5,707,739.

This is a Divisional of U.S. Ser. No. 08/468,364 now U.S. Pat. No. 5,567,435, filed Jun. 6, 1995, by Jeffrey A. Hubbell, Chandrashekhar P. Pathak, Amarpreet S. Sawhney, Neil P. Desai and Jennifer L. Hill-West for "Photopolymerizable Biogradable Hydrogels as Tissue Contacting Materials and Controlled-Release Carriers," which is a divisional of U.S. Ser. No. 08/379,848 now U.S. Pat. No. 5,626,863, filed on Jan. 27, 1995, which is a divisional of U.S. Ser. No. 08/022,687, filed Mar. 1, 1993, now U.S. Pat. No. 5,410,016, which is a continuation-in-part of U.S. Ser. No. 07/843,485, filed on Feb. 28, 1992, now abandoned.

REFERENCE TO RELATED APPLICATIONS This application is a continuation-in-part application of provisional U.S. Ser. No. 60/000,144 filed Jun. 12, 1995.

REFERENCE TO RELATED APPLICATIONS This application is a continuation-in-part of U.S. patent application Ser. No. 08/426,039, filed Jun. 5, 1995, now abandoned.

This application is a continuation-in-part of U.S. Ser. No. 08/132,745, filed Oct. 6, 1993, now U.S. Pat. No. 5,575,815, which is a continuation-in-part of U.S. application Ser. No. 08/118,978, filed Sep. 9, 1993, now abandoned, which is a continuation-in-part of U.S. application Ser. No. 07/987,357, filed Dec. 7, 1992, now abandoned, which is a continuation of U.S. application Ser. No. 07/857,700, filed Mar. 25, 1992, now U.S. Pat. No. 5,213,580 which is a continuation of U.S. application Ser. No. 07/593,302, filed Oct. 3, 1990, now abandoned, which is a continuation of U.S. application Ser. No. 07/235,998, filed Aug. 24, 1988, now abandoned, and which is a continuation-in-part of U.S. application Ser. No. 08/182,516, filed Jan. 14, 1994, still pending, which is a continuation of U.S. application Ser. No. 07/593,302, filed Oct. 3, 1990, now abandoned, which is a continuation-in-part of U.S. Ser. No. 07/235,998, filed Aug. 24, 1988, now abandoned, and which is also a continuation-in-part of U.S. application Ser. No. 08/101,966, filed Aug. 4, 1993, now U.S. Pat. No. 5,328,471, which is a continuation of U.S. application Ser. No. 07/869,907, filed Apr. 15, 1992, now abandoned, which is a continuation of U.S. application Ser. No. 07/759,048, filed Sep. 5, 1991, now abandoned, which is a continuation of U.S. application Ser. No. 07/485,287, filed Feb. 26, 1990, now abandoned.

BACKGROUND OF THE INVENTION This is a divisional of application U.S. Ser. No. 08/022,687 filed in the U.S. Patent & Trademark Office on Mar. 1, 1993, now U.S. Pat. No. 5,410,016 entitled `Photopolymerizable Biodegradable Hydrogels as Tissue Contacting Materials and Controlled-Release Carriers` which is a continuation-in-part of U.S. patent application No. 07/843,485, filed Feb. 28, 1992, now abandoned entitled "Photopolymerizable Biodegradable Hydrogels as Tissue Contacting Materials and Controlled Release Carriers" by Jeffrey A. Hubbell, Chandrashekhar P. Pathak, and Amarpreet S. Sawhney.

This is a divisional of copending application Ser. No. 08/379,848 filed on Jan. 27, 1995, by Jeffrey A. Hubbell, Chandrashekhar P. Pathak, Amarpreet S. Sawhney, Neil P. Desai, and Jennifer L. Hill for "Photopolymerizable Biodegradable Hydrogels as Tissue Contacting Materials and Controlled-Release Carriers," which is a divisional of U.S. Ser. No. 08/022,687 filed on Mar. 1, 1993, now U.S. Pat. No. 5,410,016, which is a continuation-in-part of U.S. Ser. No. 07/843,485 filed on Feb. 28, 1992, now abandoned, entitled "Photopolymerizable Biodegradable Hydrogels as Tissue Contacting Materials and Controlled Release Carriers" by Jeffrey A. Hubbell, Chadrashekhar P. Pathak, and Amarpreet S. Sawhney.

FIELD OF THE INVENTION The present invention relates to photopolymerizable biodegradable hydrogels for use as tissue adhesives and in controlled drug delivery. BACKGROUND OF THE INVENTION This is a continuation-in-part of U.S. patent application No. 07/843,485, filed Feb. 28, 1992 now abandoned, entitled "Photopolymerizable Biodegradable Hydrogels as Tissue Contacting Materials and Controlled Release Carriers" by Jeffrey A. Hubbell, Chandrashekhar P. Pathak, and Amarpreet S. Sawhney and a continuation-in-part of U.S. Ser. No. 07/598,880 filed Oct. 15, 1990 and its divisional, U.S. Ser. No. 07/740,703, filed Aug. 5, 1991, by Jeffrey A. Hubbell and Amarpreet S. Sawhney.