**EXHIBIT 31.1**

 

**CERTIFICATIONOF CHIEF EXECUTIVE OFFICER PURSUANT TO SECTION 302 OF THE**

**SARBANES-OXLEYACT OF 2002**

 

I,John Kaiser, Chief Executive Officer and Director of the Registrant, CrdentiaCorp., certify that:

 

1.                                       I have reviewedthis quarterly report on Form 10-Q of Crdentia Corp.;

 

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

 

3.                                       Based on myknowledge, the financial statements, and other financial information includedin this quarterly report, fairly present in all material respects the financialcondition, results of operations and cash flows of the registrant as of, andfor, the periods presented in this quarterly report;

 

4.                                       The registrant’sother certifying officer and I are responsible for establishing and maintainingdisclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and15d-15(e)) for the registrant and we have:

 

(a)                                  designed such disclosurecontrols and procedures, or caused such disclosure controls and procedures tobe designed under our supervision, to ensure that material information relatingto the registrant, including its consolidated subsidiaries, is made known to usby others within those entities, particularly during the period in which thisquarterly report is being prepared;

 

(b)                                 evaluated the effectivenessof the registrant’s disclosure controls and procedures and presented in thisreport our conclusions about the effectiveness of the disclosure controls andprocedures as of the end of the period covered by this quarterly report based onsuch evaluation; and

 

(c)                                  disclosed in this report anychange in the registrant’s internal controls over financial reporting thatoccurred during the registrant’s most recent fiscal quarter (the registrant’sfourth fiscal quarter in the case of an annual report) that has materiallyaffected, or is reasonably likely to materially affect, the registrant’sinternal control over financial reporting; and

 

5.                                       The registrant’sother certifying officer and I have disclosed, based on our most recentevaluation of internal control over financial reporting, to the registrant’sauditors and the audit committee of the registrant’s board of directors (orpersons performing the equivalent functions):

 

(a)                                  all significant deficienciesand material weaknesses in the design or operation of internal control overfinancial reporting which are reasonably likely to adversely affect theregistrant’s ability to record, process, summarize and report financialinformation; and

 

(b)                                 any fraud, whetheror not material, that involves management or other employees who have asignificant role in the registrant’s internal control over financial reporting.

 
| Date:   May 15, 2008 | By:                                                     |  /s/ John Kaiser |
|--------------------------------|---------------------------------------------------------|-----------------------|
|                           |    John  Kaiser                          |
|                           |    Chief  Executive Officer and Director |

 

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