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Purpose: A malunion with a step-off of 1 mm or more after an intra-articular distal radius fracture may cause pain and arthritic changes at midterm follow-up. We present our technique for treating intra-articular distal radius malunions by carrying out an osteotomy from inside the joint outward under arthroscopic guidance using the dry arthroscopy technique, with emphasis on the clinical and radiologic outcomes., Methods: We performed surgery on 11 patients for intra-articular malunion of the distal radius 1 to 5 months after the injury. Preoperative step-offs ranged from 2 to 5 mm (average, 2.5 mm) on plain radiographs. Original fracture patterns involved 1 radial styloid fracture, 1 radiocarpal fracture-dislocation, and 9 comminuted intra-articular fractures. In 5 cases an anterior-ulnar or radial styloid fragment was repositioned. In the rest, more than 1 fragment (up to 3) was osteotomized. In 1 patient the articular osteotomy was combined with an ulnar shortening osteotomy., Results: Follow-up ranged from 12 to 48 months. Step-offs were reduced in most cases to 0 mm; however, localized gaps (<2 mm) and cartilage defects were commonly seen intraoperatively because the fragments did not accurately fit. According to the Gartland and Werley score, there were 4 excellent and 7 good results (mean score of 2.8). The Modified Green and O'Brien system achieved a mean score of 83, with 3 excellent, 5 good, and 3 fair results. One patient showed radiolunate narrowing on follow-up radiographs., Conclusions: Arthroscopically assisted osteotomy permits direct visualization of the osteotomy site with good midterm clinical and radiologic outcomes. The technique can be used in irregularly defined fragments., Type of Study/level of Evidence: Therapeutic IV., (Copyright 2010. Published by Elsevier Inc.)

Purpose: To present a method to perform arthroscopic exploration and instrumentation without infusing any fluid., Methods: The hand is suspended from a bow, with traction on all fingers. Portals are developed as in the classic (wet) wrist arthroscopic procedure except that no water is infused to distend the joint and create the optic cavity. For this procedure the joint must be dried; we use suction through the synoviotomes and neurosurgical patties to accomplish this., Results: We have performed more than 100 wrist arthroscopies using the dry technique without any undue difficulty., Conclusions: The dry technique is as effective as the classic procedure, without the cumbersome leakage of water or the risk of compartment syndrome. It allows some sophisticated arthroscopic procedures to be performed that would be impracticable with water. In addition from these benefits, if open surgery is performed after the arthroscopic exploration then the tissue planes are dry, making surgery much easier. The technique is believed to be inappropriate if thermal probes are used. A learning curve exists.

Purpose: To present an inside-out osteotomy technique under arthroscopic guidance to correct an intra-articular malunion., Methods: The joint is explored with a 2.7-mm arthroscope through the standard portals without infusing any water. To allow room to introduce the curettes and the osteotomes (4-mm wide), the instrumentation portals are made slightly larger than usual. Malunited fragments are cut with the osteotomes from inside the joint and advanced out. Fragments are mobilized, and granulating tissue and/or new bone is removed with curettes and synoviotomes. After disimpaction and reduction, fixation with plates or screws via the appropriate open approach is performed under arthroscopic control. No water is used throughout the procedure except at the end of the surgery to clear out debris., Results: Steps were corrected to 0 mm in all patients. Gaps of less than 1 mm were common., Conclusions: This procedure allows us to define each cartilage-containing fragment and to re-create the original articular fracture line without the fear of creating new fracture lines on the articular surface. This technique can be used for patients with irregularly defined fragments that are not amenable to classic techniques. The key to the procedure is to perform the arthroscopic exploration without water infusion (dry technique).