EXHIBIT 5.1 Morgan, Lewis & Bockius LLP 1701 Market Street Philadelphia, PA 19103 June 26, 2002 Closure Medical Corporation 5250 Greens Dairy Road Raleigh, NC 27616 Re: Closure Medical Corporation - Registration Statement on Form S-8 Relating to the Closure Medical Corporation Amended and Restated 1996 Equity Compensation Plan Ladies and Gentlemen: We have acted as counsel to Closure Medical Corporation, a Delaware corporation (the "Company"), in connection with the preparation of the subject Registration Statement on Form S-8 (the "Registration Statement" to be filed with the Securities and Exchange Commission (the "Commission") under the Securities Act of 1933, as amended (the "Act"), relating to 1,500,000 shares of the Company's common stock, par value $.01 per share (the "Common Stock"), issuable under the Closure Medical Corporation Amended and Restated 1996 Equity Compensation Plan (the "Plan"). In rendering the opinion set forth below, we have examined the Registration Statement and the exhibits thereto, including the Plan, certain records of the Company's corporate proceedings as reflected in its minute books and such statutes, records and other documents as we have deemed relevant. In our examination, we have assumed the genuineness of documents submitted to us as originals and the conformity with the originals of all documents submitted to us as copies thereof. Closure Medical Corporation June 26, 2002 Page 2 Based on the foregoing, it is our opinion that the shares of Common Stock issuable under the Plan will be, when issued in accordance with the terms of the Plan, validly issued, fully paid and nonassessable. The opinion set forth above is limited to the General Corporation Law of the State of Delaware, as amended. We hereby consent to the use of this opinion as Exhibit 5.1 to the Registration Statement. In giving such consent, we do not thereby admit that we are acting within the category of persons whose consent is required under Section 7 of the Act and the rules or regulations of the Commission thereunder. The opinion expressed herein is solely for your benefit and may be relied upon only by you. Very truly yours, /s/ Morgan, Lewis & Bockius LLP