
                                                                    EXHIBIT 31.1


                  CERTIFICATION OF THE CHIEF EXECUTIVE OFFICER

      I, James D. Durham, Chairman and Chief Executive Officer of Crdentia Corp.
(the "Registrant"), certify that:

      1. I have reviewed this annual report on Form 10-KSB/A of the Registrant;

      2. Based on my  knowledge,  this annual 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 annual
report;

      3. Based on my knowledge,  the financial  statements,  and other financial
information  included  in this annual  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 annual 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  annual  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 annual 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  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  Registrant's  board of
directors:

            a)    all significant  deficiencies  and material  weaknesses in the
                  design  or  operation  of  internal  controls  over  financial
                  reporting which are reasonably  likely to adversely affect the
                  Registrant's ability to record, process,  summarize and report
                  financial data; and

            b)    any fraud,  whether or not material,  that involves management
                  or  other  employees  who  have  a  significant  role  in  the
                  Registrant's internal controls over financial reporting.

Dated: April 29, 2005


/s/ James D. Durham
------------------------------------
James D. Durham,
Chairman and Chief Executive Officer
(Principal Executive Officer)
