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-Q 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;
| | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | (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
| | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | (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
| | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

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
| | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | (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:  August 13, 2008 | /s/ John E. Yetter                                                                                           | 
|                        | John E. Yetter, CPA
        Vice President and Chief Financial Officer
        (Principal Financial Officer) |