Lead Sponsor: Boston Children's Hospital

Collaborators: Children's Hospital of Philadelphia, Stanford University, The Cleveland Clinic, Children's Healthcare of Atlanta, Children's Hospital Medical Center, Cincinnati, Washington University School of Medicine, Tennessee Orthopedic Alliance, Rady Children's Hospital, San Diego, Hospital for Special Surgery, New York

Intervention / Treatment: OTHER: Non-operative treatment group will undergo standardized treatment which will include rehabilitation, bracing and certain activity restrictions, PROCEDURE: Surgical technique: Transphyseal reconstruction, PROCEDURE: Surgical technique: Partial transphyseal reconstruction, PROCEDURE: Surgical technique: Physeal sparing reconstruction by the Anderson method, PROCEDURE: Surgical technique: Physeal sparing reconstruction by the Micheli/Kocher method

Lead Sponsor: Hospital for Special Surgery, New York

Collaborators: Boston Children's Hospital, The Hospital for Sick Children

Intervention / Treatment: DEVICE: Tantalum Beads & Injector, PROCEDURE: Percutaneous Drill Epiphysiodesis, PROCEDURE: Percutaneous Screw Epiphysiodesis

Lead Sponsor: Boston Children's Hospital

Collaborators: University of California, San Francisco, University of Michigan, Children's Healthcare of Atlanta, Washington University School of Medicine, Rady Children's Hospital, San Diego, Texas Scottish Rite Hospital for Children, Campbell Clinic

Intervention / Treatment: PROCEDURE: Surgery