Exhibit 31.2

Certification of
Principal Financial OfficerPursuant to Section 302 of theSarbanes-Oxley Act of
2002

I, John E. Yetter, certify that:

1.    
          I have reviewed this quarterly report on Form 10-QSB of Derma Sciences, Inc.
          (the Registrant);

2.    
          Based on my knowledge, this quarterly report does not contain any untrue
          statement of a material fact or omit to state a material fact necessary to make
          the statements made, in light of the circumstances under which such statements
          were made, not misleading with respect to the period covered by this quarterly
          report;

3.    
          Based on my knowledge, the financial statements, and other financial information
          included in this quarterly report, fairly present in all material respects the
          financial condition, results of operations and cash flows of the Registrant as
          of, and for, the periods presented in this quarterly report;

4.    
          The Registrants other certifying officer and I are responsible for
          establishing and maintaining disclosure controls and procedures (as defined in
          Exchange Act Rules 13a-15(e) and 15d-15(e)) for the Registrant and have:

| | (a) |  | Designed
such disclosure controls and procedures, or caused such disclosure
controls and procedures to be designed under our supervision, to
ensure that  material information relating to the Registrant,
including its consolidated  subsidiaries, is made known to us by
others within those entities, particularly  during the period in which
this report is being prepared;
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| | (b) |  | Evaluated
the effectiveness of the Registrants disclosure controls and
procedures and presented in this report our conclusions about the
effectiveness  of the disclosure controls and procedures, as of the
end of the period covered  by this report based on such evaluation;
and
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| | (c) |  | Disclosed
in this report any change in the Registrants internal control
over financial reporting (as defined in Exchange Act Rule 13a-15(f)
and  15d-15(f)) that occurred during the Registrants most recent
fiscal quarter  that has materially affected, or is reasonably likely
to materially affect, the  Registrants internal control over
financial reporting; and
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5.    
          The Registrants other certifying officer and I have disclosed, based on
          our most recent evaluation of internal control over financial reporting, to the
          Registrants auditors and the audit committee of the Registrants
          board of directors (or persons performing the equivalent functions):

| | (a) |  | All
significant deficiencies and material weaknesses in the design or operation
of internal control over financial reporting which are reasonably
likely to  adversely affect the Registrants ability to record,
process, summarize and  report financial information; and
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| | (b) |  | Any
fraud, whether or not material, that involves management or other employees
who have a significant role in the Registrants internal control
over  financial reporting.
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|-------------------- | ------------------------------------------------------------------------------------------------------------ | 
|Dated:  May 14, 2007 | /s/ John E. Yetter                                                                                           | 
|                     | John E. Yetter, CPA
        Vice President and Chief Financial Officer
        (Principal Financial Officer) |