Exhibit 31.1

CERTIFICATION PURSUANT TO RULES 13a-14 AND 15d-14
UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED

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

      1. I have reviewed this quarterly report on Form 10-QSB of Crdentia Corp.;

      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
small  business  issuer as of, and for, the periods  presented in this quarterly
report;

      4.  The  small  business  issuer'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 small
business issuer and we 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
            small business issuer, including its consolidated  subsidiaries,  is
            made  known to us by  others  within  those  entities,  particularly
            during the period in which this quarterly report is being prepared;

      (b)   evaluated  the   effectiveness   of  the  small  business   issuer'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  quarterly
            report based on such evaluation; and

      (c)   disclosed in this report any change in the small  business  issuer's
            internal controls over financial  reporting that occurred during the
            small  business  issuer's  most  recent  fiscal  quarter  (the small
            business  issuer's  fourth  fiscal  quarter in the case of an annual
            report) that has  materially  affected,  or is reasonably  likely to
            materially affect, the small business issuer's internal control over
            financial reporting; and

      5.  The  small  business  issuer's  other  certifying  officer  and I have
disclosed,  based  on our  most  recent  evaluation  of  internal  control  over
financial  reporting,  to the small  business  issuer's  auditors  and the audit
committee  of the  small  business  issuer'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 small business  issuer'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 small  business
            issuer's internal control over financial reporting.


Dated: May 16, 2005                  By:    /S/  James D. Durham
                                            ------------------------
                                            James D. Durham
                                            Chief Executive Officer
                                            and Chairman of the Board


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