<SUBMISSION>
<ACCESSION-NUMBER>0001179110-08-007492
<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>HERMAN THOMAS F
<CIK>0001253547
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>000-31152
<FILM-NUMBER>08746136
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>GOOD GUYS
<STREET2>1600 HARBOR BAY PARKWAY
<CITY>ALAMEDA
<STATE>CA
<ZIP>94502
</BUSINESS-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>0001253547</rptOwnerCik>
            <rptOwnerName>HERMAN THOMAS F</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>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.23</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2008-04-04</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>100000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2018-04-04</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>100000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>100000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The option shall vest and become exercisable over two years, with 50% of the shares subject to the option vesting on the first anniversary of the date of grant and the remaining 50% of the shares subject to the option vesting on the second anniversary of the date of grant.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Thomas F. Herman</signatureName>
        <signatureDate>2008-04-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
