Boston Brace RC Orthosis – Hanger Clinic You must be logged in to view this content. Course Content Lessons 1. Introduction and History of the Rigo- Cheneau Brace Incomplete Start Lesson 2. Overview of the Rigo Classification System and Patient Evaluation Incomplete Start Lesson 3. Boston RC Order Form Instructions and Review Incomplete Start Lesson Quizzes 1. Certification Exam Incomplete