I'll assume you already have access to the ItemRevision in Mendix.
You can attach a new Dataset to the ItemRevision using the Teamcenter Extension.
Download the Teamcenter Extension from the marketplace (https://marketplace.mendix.com/link/component/225544) and also the Teamcenter Connector.
Here is the documentation how you can attach a file to an ItemRevision using the Teamcenter Extension: https://docs.mendix.com/appstore/modules/teamcenter-extension/#attachdatasetstoitemrevision
You can see an example how you can use the generated microflows in the Teamcenter Extension Sample App: https://marketplace.mendix.com/link/component/225910