Jean F. Goubau

Cone-beam computed tomography: a new low dose, high resolution imaging technique of the wrist, presentation of three cases with technique.

Cone-beam computed tomography (CBCT) is a relatively new technique. It generates a 3D image by emitting a pulsed cone-shaped X-ray beam. CBCT has become a very useful and widely used technique for dentomaxillofacial imaging over the last decade. It provides clear, high resolution multiplanar reconstruction images. Previously, the images could only be generated while the patient was sitting with his/her head fixed in position. With the presented new generation CBCT (NewTom 5G, QR, Verona, Italy), a more free positioning of the patient, either lying or sitting, is possible. In this way, skeletal imaging of various body parts becomes possible. In this article we present three clinical cases of CBCT imaging of the wrist, describe the background of the technique, and discuss the advantages and disadvantages of CBCT imaging.

Use of digital tomosynthesis: case report of a suspected scaphoid fracture and technique

Digital tomosynthesis is a relatively new technique for producing an arbitrary number of slice images generated retrospectively from a sequence of projections acquired during a single motion of the X-ray tube. Tomosynthesis has already been described for mammographic and thoracic applications to reduce overlap of tissues. We present a case of a 19-year-old man with a suspected scaphoid fracture in which we used digital tomosynthesis to confirm the diagnosis and thus excluded the need for other imaging modalities. We also describe the technique and background of tomosynthesis with possible future indications for this new promising technique.

Clinical and radiological outcomes of the Ivory arthroplasty for trapeziometacarpal joint osteoarthritis with a minimum of 5 years of follow-up: a prospective single-centre cohort study

We present the results of a 5 year prospective follow-up study on the functional outcome after total replacement of the trapeziometacarpal joint with the Ivory prosthesis (Memometal, Stryker Corporate, Kalamazoo, Michigan, USA) in 22 patients. The female to male ratio was 21:1 and the mean age was 66 (range 54–78) years. The mean follow-up period was 67 (range 60–77) months after operation. Patient satisfaction was high. The mobility of the operated thumb was restored to a range of motion comparable to the contralateral thumb. Key pinch and grip strength improved by 13% and 31%, respectively. Overall function, according to Quick Disabilities of the Arm, Shoulder and Hand (QuickDASH) score, improved by 59%. Pain decreased by 85% according to the numerical rating scale. Radiological evaluation revealed no loosening of the implant after 5 years except in one patient who required revision due to polythene wear with secondary joint instability. Another patient had asymptomatic polythene wear that required no revision but remains in follow-up. The 5 year overall survival of the prosthesis was 95%. These medium-term results suggest that the Ivory arthroplasty is a reliable option for treating advanced trapeziometacarpal arthritis, because it appears to give a very good functional outcome and has the potential for long-term survival rates.

The wrist hyperflexion and abduction of the thumb (WHAT) test: a more specific and sensitive test to diagnose de Quervain tenosynovitis than the Eichhoff’s Test

De Quervain’s disease has different clinical features. Different tests have been described in the past, the most popular test being the Eichhoff’s test, often wrongly named as the Finkelstein’s test. Over the years, a misinterpretation has occurred between these two tests, the latter being confused with the first. To compare the Eichhoff’s test with a new test, the wrist hyperflexion and abduction of the thumb test, we set up a prospective study over a period of three years for a cohort of 100 patients (88 women, 12 men) presenting spontaneous pain over the radial side of the styloid of the radius (de Quervain tendinopathy). The purpose of the study was to compare the accuracy of the Eichhoff’s test and wrist hyperflexion and abduction of the thumb test to diagnose correctly de Quervain’s disease by comparing clinical findings using those tests with the results on ultrasound. The wrist hyperflexion and abduction of the thumb test revealed greater sensitivity (0.99) and an improved specificity (0.29) together with a slightly better positive predictive value (0.95) and an improved negative predictive value (0.67). Moreover, the study showed us that the wrist hyperflexion and abduction of the thumb test is very valuable in diagnosing dynamic instability after successful decompression of the first extensor compartment. Our results support that the wrist hyperflexion and abduction of the thumb test is a more precise tool for the diagnosis of de Quervain’s disease than the Eichhoff’s test and thus could be adopted to guide clinical diagnosis in the early stages of de Quervain’s tendinopathy.

De Quervain Tenosynovitis Following Trapeziometacarpal Ball-and-Socket Joint Replacement.

Background One of the surgical treatment options for trapeziometacarpal (TMC) joint arthritis is a prosthetic ball-and-socket replacement. One of the complications in the postoperative setting is de Quervain tendinopathy. Purposes Although this complication has been reported following a resection athroplasty, we questioned whether lengthening of the thumb following the Ivory (Memometal, Stryker Corporate, Kalamazoo, MI, USA) ball-and-socket arthroplasty could be a causal factor. Methods In a prospective study regarding the overall outcome of the Ivory prosthesis, we analyzed 96 cases (83 patients; 69 female, 12 male, 8 bilateral) of primary implanted Ivory prosthesis and the incidence of de Quervain disease during the first year following surgery. We found a particularly high incidence (17%) of de Quervain tendinopathy the first year following this ball-and-socket arthroplasty. We measured the lengthening of the thumb radiographically in the group presenting de Quervain and the asymptomatic group and compared this measure between the two groups. Results We did not find any measurable or statistically significant difference between the groups regarding lengthening. Discussion These findings suggest that lengthening of the thumb following ball-and-socket arthroplasty is not a causal factor in the development of de Quervain tendinopathy within one year after surgery.

Addition–subtraction osteotomy with ligamentoplasty for symptomatic trapezial dysplasia with metacarpal instability

Trapeziometacarpal instability with trapezial dysplasia is a disabling condition long before the radiological changes of osteoarthritis appear. In dysplastic joints surgical soft tissue correction fails to prevent the instability, requiring a correction of the bony anatomy. We combined two techniques described in the past, an abduction osteotomy of the first metacarpal and an opening wedge osteotomy of the trapezium, to which we added a ligament reconstruction. The combination of both osteotomy techniques restores the anatomy and centres the forces acting across the joint. We have done this procedure 21 times since 2003 in 18 patients. Seventeen thumbs were reviewed prospectively with a mean follow-up of 39 (range 16–65) months. Mean QuickDASH improved by 33.9 points, the key pinch improved by 1.8 kg and the grip strength improved by 8.7 kg. The visual analogue scale for pain improved from 7.9 preoperatively to 2 postoperatively. This technique preserves the trapeziometacarpal joint, allowing other techniques to be used if painful arthritis should develop in the middle to long term.

Pulley Reconstruction As Part of the Surgical Treatment for de Quervain Disease: Surgical Technique with Medium-Term Results

Background Simple decompression of the first extensor compartment is commonly used for treating de Quervain disease, with the possible complication of subluxation of the tendons of the abductor pollicis longus (APL) and extensor pollicis brevis (EPB) over the radial styloid. To prevent this painful subluxation of the tendons, several methods of reconstructing the pulley have been proposed. Questions/Purposes The purpose of our study was to evaluate a new technique for reconstructing the first extensor compartment following a release for de Quervain disease. Patients and Methods A retrospective study (mean length 40.4 months) was performed in 45 patients. The outcome assessment involved two different questionnaires and ultrasound evaluation of any tendon subluxation. Results None of the patients required reoperation for tendon instability or incomplete decompression of the first extensor compartment. Two patients experienced clicking around the radial styloid after surgery. This was not related to the amount of volar migration of the tendons. Conclusions We believe the reconstruction proposed here is an effective method of preventing painful subluxation of the APL and EPB following a release of the first extensor compartment.

PRIMARY SHORTENING OF THE FOREARM AND SAUVÉ-KAPANDJI FOR SEVERELY COMMINUTED FRACTURES OF THE DISTAL FOREARM IN ELDERLY PATIENTS: A CASE REPORT

We report a case of an elderly female who sustained a severely comminuted distal radial and ulnar fracture, treated by shortening of the forearm, combined with a primary Sauvé-Kapandji procedure and volar plating of the distal radius.

Treatment of a symptomatic trapezial dysplasia with metacarpal instability following thumb metacarpal lengthening with an addition-subtraction osteotomy

The most important problem of trapezial dysplasia with thumb metacarpal instability is of bony origin. Together with the progressive capsuloligamentous decompensation it evolves in a progressive adduction deformity of the thumb metacarpal secondary to the dysplasia of the trapezium with its increased articular slope. The addition-subtraction osteotomy restores the anatomy combining two techniques: an abduction-extension osteotomy of the first metacarpal to correct the axis of the first metacarpal and an opening wedge osteotomy of the trapezium to reorientate the trapezial saddle. We present a case of an addition-subtraction osteotomy in a case of symptomatic trapezial dysplasia with metacarpal instability following a thumb metacarpal lengthening in a severely mutilated hand. This technique was especially effective in reducing the instability and pain but mainly in maintaining mobile the only remaining joint of the thumb.

Midterm Follow-up of Treating Volar Marginal Rim Fractures with Variable Angle Lcp Volar Rim Distal Radius Plates

BACKGROUND Specific treatment of the volar marginal rim fragment of distal radius fractures avoids occurance of volar radiocarpal dislocation. Although several fixation systems are available to capture this fragment, adequately maintaining internal fixation is difficult. We present our experience of the first 10 cases using the 2.4 mm variable angle LCP volar rim distal radius plate (Depuy Synthes®, West Chester, US), a low-profile volar rim-contouring plate designed for distal plate positioning and stable buttressing of the volar marginal fragment. METHODS Follow-up patient satisfaction, range of motion, grips strength, functional scoring with the QuickDASH and residual pain with a numeric rating scale were assessed. Radiological evaluation consisted in evaluating fracture consolidation, ulnar variance, volar angulation and maintenance of the volar rim fixation. RESULTS The female to male ratio was 5:5 and the mean age was 52.2 (range, 17-80) years. The mean follow-up period was 11 (range, 5-19) months postoperatively. Patient satisfaction was high. The mean total flexion/extension range was 144° (range, 100-180°) compared to the contralateral uninjured side 160° (range, 95-180°). The mean total pronation/supination range was 153° (range, 140-180°) compared to the contralateral uninjured side 170° (range, 155-180°). Mean grip strength was 14 kg (range, 9-22), compared to the contralateral uninjured side 20 kg (range, 12-25 kg). Mean pre-injury level activity QuickDASH was 23 (range, 0-34.1), while post-recovery QuickDASH was 25 (range 0-43.2). Residual pain was 1.5 on the visual numerical pain rating scale. Radiological evaluation revealed in all cases fracture consolidation, satisfactory reconstruction of ulnar variance, volar angulation and volar rim. We encountered no flexor tendon complications, although plate removal was systematically performed after fracture consolidation. CONCLUSIONS The 2.4 mm variable angle LCP volar rim distal radius plates is a valid treatment option for treating the volar marginal fragment in distal radius fractures.