<SUBMISSION>
<ACCESSION-NUMBER>0001179110-08-007491
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20080404
<FILING-DATE>20080408
<DATE-OF-FILING-DATE-CHANGE>20080408
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>CRDENTIA CORP
<CIK>0001073857
<ASSIGNED-SIC>7363
<IRS-NUMBER>760585701
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>14114 DALLAS PARKWAY
<STREET2>SUITE 600
<CITY>DALLAS
<STATE>TX
<ZIP>75254
<PHONE>972-850-0780
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>14114 DALLAS PARKWAY
<STREET2>SUITE 600
<CITY>DALLAS
<STATE>TX
<ZIP>75254
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>LIFEN INC
<DATE-CHANGED>20001115
</FORMER-COMPANY>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>DIGIVISION INTERNATIONAL LTD
<DATE-CHANGED>20001005
</FORMER-COMPANY>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>Kaiser John
<CIK>0001393457
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>000-31152
<FILM-NUMBER>08746133
</FILING-VALUES>
<BUSINESS-ADDRESS>
<PHONE>972-850-0780
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>C/O CRDENTIA CORP.
<STREET2>5001 LBJ FREEWAY, SUITE 850
<CITY>DALLAS
<STATE>TX
<ZIP>75244
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-04-04</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001073857</issuerCik>
        <issuerName>CRDENTIA CORP</issuerName>
        <issuerTradingSymbol>CRDT.OB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001393457</rptOwnerCik>
            <rptOwnerName>Kaiser John</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CRDENTIA CORP.</rptOwnerStreet1>
            <rptOwnerStreet2>5001 LBJ FREEWAY, SUITE 850</rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75244</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Executive Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2008-04-04</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>300000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2300000</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Twenty-five percent (25%) of the Total Number of Shares shall vest twelve (12) months after the Vesting Commencement Date.  One-thirty-sixth (1/36th) of the remaining unvested Shares shall vest at the end of the 13th month and each month thereafter, such that the Shares will be one hundred percent (100%) vested after forty-eight (48) months of Continuous Services from Vesting Commencement Date.</footnote>
        <footnote id="F2">Does not include 85,000 shares held by the Kaiser Family Trust (&quot;Trust&quot;).  The Reporting Person disclaims beneficial ownership of these shares, except to the extent of his pecuniary interest in the Trust, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or any other purpose.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ John Kaiser</signatureName>
        <signatureDate>2008-04-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
