I found the following references helpful as a broad overview to DDH/CDH:
Hennrikus WL (1999) Developmental Dysplasia of the Hip: Dx and Rx in Children Younger than 6 Months. Pediatric Annals, 28 (12), 740-46.
Patel H (2001) Preventative health care, 2001 update: screening and management of developmental dysplasia of the hip in newborns. CMAJ, 164 (12) 1669-77.
Haynes RJ (2001) Developmental Dysplasia of the Hip: Etiology, Pathogenesis, and Examination and Physical Findings in the Newborn. Instructional Course Lectures, 50, 535-40.
Willis RB (2001) Developmental Dysplasia of the Hip: Assessment and Treatment Before Walking Age. Instructional Course Lectures, 50, 541-545.
Moseley CF (2001) Developmental Hip Dysplasia and Dislocation: Management of the Older Child. Instructional Course Lectures, 50, 547-553.
In relation to braces, I have seen the von Rosen splint being used in Brisbane. Interesting references are the original von Rosen articles (try around year 1962 - Journal of Bone and Joint Surgery). I could find no info comparing von Rosen splint to Pavlik harness.
Hope this helps,
Trish.