what type of screw is this?

[Kacey]

Not sure if I'm uploading my photo properly...
I'm new at this type of appliance. What type of screw, and size, do you think this is?
Thank you..

 

[Betalab]

Your photo is fine .
Your appliance is an expansion appliance. Here we call them Schwartz appliance.
Dr. Skip Truitt made them popular amongst gp's in Australia
The brand looks like Dentaurum
http://www.dentaurum.de/files/989-549-60.pdf
The lower in this case has only 2 bars which is good for space compromised
Hope this helps
Patrick

 

[Kacey]

Thank you. I thought so, but wasn't sure. Yesterday afternoon I got to observe someone from this site and she worked and I thought I remembered her saying those were Schwartz, but wasn't sure. Thanks for the info about the screw type.

 

[Betalab]

No probs