as you did already suppose, your diploma has been accepted as partially valid in Germany.
The document contains the decision, the explanation of the decision and instructions on right to appeal . You can file an objection to this decision within four weeks after having received the document.
You can contact specialists of 'Handwerkskammer Berlin' and ask for help: ****://tinyurl.***/yb84h42h. You have to type "Zahntechnik" into the second slot of the form and then click "Ansprechpartner finden".
See what the people of the job coaching project 'ARRIVED' can do for you. Contact
information (Source: ****://tinyurl.***/y7u9ts2m):
Svenja Rahf und Janek Debus
Tel.: +49 30 80 99 41 17/19
Mobil: 0159 03 51 31 38
More informations can be provided by the dental technician's guild in Berlin:
Contact information (Source: ****://tinyurl.***/yd7f9559)
Telefon: 030 / 393 50 36
Fax: 030 / 393 60 36
Furthermore I would recommend an educational guidance at your local job center in Berlin.