Die frühfunktionelle Therapie intraartikulärer Mittelgliedbasisfrakturen mit der modifizierten Traktionsschiene

Abstract

Treatment of intra-articular fractures of the middle phalanx is both difficult and controversial. We report our experience of using a modified dynamic traction device (mTD) utilizing only one pin in the head of the middle phalanx and thus facilitating further open reconstructive surgery at the proximal interphalangeal joint (PIP). The pin does not necessarily have to be inserted in the movement axis of the joint. The aim of the study was to a) determine the effectiveness of the mTD, particularly in comparison with other distraction systems used in the treatment of middle phalanx fractures as described in the literature, and b) compare the results of patients treated using an mTD only with the results of those treated with an mTD in combination with additional open reconstructive surgery. 26 patients with a mean age of 37 years were treated for intra-articular fractures of the base of the middle phalanx using an mTD in the period between 2007 and 2011. 13 of these patients also underwent additional open reconstructive surgery. 18 of the 26 patients (69%) were reevaluated after 33 months (range 9-44 months); 10 of these had undergone additional open reconstructive surgery. Follow-up of 14 of the patients included their completion of a structured questionnaire and calculation of their DASH scores as well as radiological and clinical examinations. 4 patients completed the questionnaire and had their DASH score calculated. Measurement of range of motion was performed by the treating general practitioner. Patient records were analysed with a particular focus on complications and duration of therapy. The mTD was used for an average of 34 days (range 8-53 days) and overall treatment took an average of 74 days (range 66-154 days). 4 pin tract infections were reported. The mean DASH score was 6.4. The mean range of motion in the PIP joint was 70° (range 30-110°). The range of motion of the PIP and DIP joints (61º) was significantly poorer in patients with additional surgery than that (82º) in patients with sole mTD treatment. Treatment with the mTD gave results similar to those obtained with other distraction devices with good subjective evaluation by the patients. Dynamic traction with the help of the modified traction devices is suitable for treating intra-articular fractures of the proximal interphalangeal joint, as demonstrated by a comparison with the literature. Patients who underwent additional open surgery showed less favorable results. The present method has the advantage that only one wire needs to be inserted subcapitaly at a distance from the fracture in the middle finger and this facilitates further surgical interventions.