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)) and internal control over financial
reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) 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)
Designed such internal control over financial reporting, or caused such internal control
over financial reporting to be designed under our supervision, to provide reasonable
assurance regarding the reliability of financial reporting and the preparation of
financial statements for external purposes in accordance with generally accepted
accounting principles;
| | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | (c)
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
| | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | (d)
Disclosed in this report any change in the Registrants internal control over
financial reporting that occurred during the Registrants most recent fiscal quarter
(the Registrants fourth fiscal quarter in the case of an annual report) that has
materially affected, or is reasonably likely to materially affect, the Registrants
internal control over financial reporting;
| | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

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.
| | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|                          |                                                                                                              | 
|------------------------- | ------------------------------------------------------------------------------------------------------------ | 
|Dated:  November 12, 2009 | /s/ John E. Yetter                                                                                           | 
|                          | John E. Yetter, CPA
        Vice President and Chief Financial Officer
        (Principal Financial Officer) |