-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 TlmylAUPikgudiVVmDb4fDVDhX3BycQIAUDJ2E9v27jEHxCugLt3Vn4j3H00d8XJ
 FRjMQC11UL1ENQsSKPJ7wg==

<SEC-DOCUMENT>0001415556-10-000003.txt : 20100223
<SEC-HEADER>0001415556-10-000003.hdr.sgml : 20100223
<ACCEPTANCE-DATETIME>20100223165139
ACCESSION NUMBER:		0001415556-10-000003
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100222
FILED AS OF DATE:		20100223
DATE AS OF CHANGE:		20100223

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SLOVIN JEFFREY
		CENTRAL INDEX KEY:			0001181235

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-22673
		FILM NUMBER:		10627050

	MAIL ADDRESS:	
		STREET 1:		C/O SIRONA DENTAL SYSTEMS, INC.
		STREET 2:		30-30 47TH AVE, SUITE 500
		CITY:			LONG ISLAND CITY
		STATE:			NY
		ZIP:			11101

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SIRONA DENTAL SYSTEMS, INC.
		CENTRAL INDEX KEY:			0001014507
		STANDARD INDUSTRIAL CLASSIFICATION:	DENTAL EQUIPMENT & SUPPLIES [3843]
		IRS NUMBER:				113374812
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		30-30 47TH AVE
		STREET 2:		SUITE 500
		CITY:			LONG ISLAND CITY
		STATE:			NY
		ZIP:			11101
		BUSINESS PHONE:		7189375765

	MAIL ADDRESS:	
		STREET 1:		30-30 47TH AVE
		STREET 2:		SUITE 500
		CITY:			LONG ISLAND CITY
		STATE:			NY
		ZIP:			11101

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SCHICK TECHNOLOGIES INC
		DATE OF NAME CHANGE:	19970425
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-02-22</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001014507</issuerCik>
        <issuerName>SIRONA DENTAL SYSTEMS, INC.</issuerName>
        <issuerTradingSymbol>siro</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001181235</rptOwnerCik>
            <rptOwnerName>SLOVIN JEFFREY</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O SIRONA DENTAL SYSTEMS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>30-30 47TH AVE, SUITE 500</rptOwnerStreet2>
            <rptOwnerCity>LONG ISLAND CITY</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>11101</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Dir. Exec. VP. COO US Op</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-02-22</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>250000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>35</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>132599</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <ownerSignature>
        <signatureName>Jeffrey T. Slovin, by Michael Friedlander, Attorney</signatureName>
        <signatureDate>2010-02-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----