Encontrei o seguinte documento no Experts Exchange .
patrikt:Você terá perda de dados, mas isso pode ser feito.
1. Detach database and move your mdf to save location. 2. Create new databse of same name, same files, same file location and same file size. 3. Stop SQL server. 4. Swap mdf file of just created DB to your save one. 5. Start SQL. DB will go suspect. 6. ALTER DATABASEyourdb
SET EMERGENCY 7. ALTER DATABASEyourdb
SET SINGLE_USER 8. DBCC CHECKDB (yourdb
, REPAIR_ALLOW_DATA_LOSS) 9. ALTER DATABASEyourdb
SET MULTI_USER 10. ALTER DATABASEyourdb
SET ONLINE