Controlled tension device fastening devices, systems, and methods

An orthotic brace comprising:

• a controlled tension unit coupled to a first portion of the orthotic brace, the controlled tension unit comprising:
• one or more constant-force spring;
• and
• a connector cable having a first end connected to an end of the one or more constant-force spring and a second end extending therefrom;
• and
• a coupling element coupled to a second portion of the orthotic brace, the coupling element being configured to couple with the second end of the connector cable, the second portion being separated from the first portion by a gap;
• wherein the controlled tension unit is configured to maintain a preselected tension between the first portion and the second portion of the orthotic brace.

A method for maintaining a preselected tension between a first portion and a second portion of an orthotic brace, the method comprising:

• connecting a controlled tension unit to the first portion of the orthotic brace, the controlled tension unit comprising:
• one or more constant-force spring;
• and
• a connector cable having a first end connected to an end of the one or more constant-force spring and a second end extending therefrom;
• and
• connecting a coupling element to the second portion of the orthotic brace;
• and
• coupling the coupling element with the second end of the connector cable.