Headless screw fixation of unstable ulnar styloid base fractures after distal radial fractures fixation.

Ulnar styloid fractures occur frequently concomitant with distal radial fractures. Although unstable distal radial fractures are mostly surgically treated, ulnar styloid fractures are often ignored. Unstable fractures at the base of the ulnar styloid may lead to persistent ulnar pain, due to distal radioulnar joint instability or ulnar styloid non-union. We retrospectively analyzed a single-surgeon cohort series of surgically treated distal radial fractures on how these concomitant ulnar styloid fractures were regarded: indications for surgery and surgical technique with headless screw fixation. 119 surgically treated distal radial fractures were assessed. 51 (42.8%) of the surgically treated distal radial fractures had a distal ulnar fracture, and more specifically 23 (19.3%) had a base fracture of the ulnar styloid. 9 (7.6%) of the wrists had a base fracture of the ulnar styloid which was considered after distal radial fracture fixation as persistently unstable, during distal radioulnar joint ballottement translation test. This fracture subtype was immediately treated with headless screw fixation, resulting in all cases in bony union, with a mean active pronation of 85°, a mean active supination of 80° and a clinical stable distal radioulnar joint, with minimal ulnar pain after 6 weeks (mean Visual Analogue Scale 1). After at least 12 months, persistent pain did not occur and mean QuickDASH was 2.5. According to this single-surgeon cohort series, headless screw fixation provides a reliable treatment for unstable base fractures of the ulnar styloid after distal radial fixation.

Analysis of trapeziometacarpal prosthesis cup position with respect to the trapezial anatomy.

The purpose of this study was to analyse the anatomy of the trapezium with regard to cup position in trapeziometacarpal replacement and identify those trapeziums that are at risk of cup perforation through the trapezoid articular surface. The width of the proximal and distal articular surface and the height of the trapezium and second metacarpal facet were measured on 96 peritrapezial views reconstructed from computed tomography scans. The trapezoid articular surface of the trapezium (TRAST) angle was calculated, and four different cup designs were virtually positioned centrally in the trapezium and parallel to the proximal articular surface. Risk of perforation was defined as a cup that exceeds the ulnar border of the proximal articular surface. The mean TRAST angle in our study was 33°. Risk of perforation is higher when the second metacarpal facet is smaller than 5 mm and when the TRAST angle is 35° or more. In these cases, the position of the cup should be more radial or more distal.

Arthroscopic Volar Extrinsic Plicature of the Volar Extrinsic Ligaments for Chronic Volar Scapholunate Instability.

The scapholunate ligamentous complex consists of the scapholunate interosseous ligament and the surrounding extrinsic ligamentous system. In cases of chronic scapholunate instability, stabilizing the extrinsic ligaments is crucial. This article presents an arthroscopic capsuloligamentous reinforcement plicature that focuses on tightening the volar scapholunate extrinsic ligaments, namely the radioscaphocapitate ligament and long radiolunate ligament, along with indirect tightening of the volar scapholunate interosseous ligament. Although it may be challenging to differentiate the effect of the volar extrinsic plicature from a dorsal capsular reinforcement when both are applied, the volar extrinsic plicature can serve as a beneficial addition to dorsal capsular reinforcement techniques for complex scapholunate instability.

Arthroscopical Reinforcement of an Isolated Insufficiency of the Radioscaphocapitate Ligament to Treat Dynamic Radioscaphoid Instability: A Case Report.

The radioscaphocapitate ligament is part of the stabilizatory complex of the scaphoid. Isolated injury resulting in persistent radioscaphoid instability is rarely reported. The authors propose a technique for arthroscopic reinforcement. Magnetic resonance, dynamic fluoroscopy, and wrist arthroscopy will confirm the elongation of radioscaphocapitate ligament. Under arthroscopic control, an anchor can be drilled into the radial aspect of the scaphoid to tension the ligament toward the anchor. An arthroscopic reinforcement of the radioscaphocapitate ligament may resolve a persistent radioscaphoid instability due to elongation.

Automated analysis of trapeziometacarpal joint kinematics using four-dimensional computed tomography.

The aim of this study was to develop an automated approach model to define in vivo kinematics of the trapeziometacarpal (TMC) joint using four-dimensional computed tomography. A total of 15 healthy volunteers were included and their TMC joint kinematics were studied during a retropulsion-opposition-retropulsion movement. We used cardan angles estimated from transformation matrices using a ZYX-decomposition and analysed the motion of the thumb metacarpal relative to the trapezium, the thumb metacarpal relative to the index metacarpal, and the trapezium relative to the index metacarpal. The study also included an analysis of the joint hysteresis effect and a joint proximity model that estimated the joint contact area during a retropulsion-opposition-retropulsion movement. The automated approach significantly decreased the time needed to analyse each case and makes this model applicable for further research on TMC kinematics.

Digital mucous cysts of the finger without osteoarthritis: optimizing outcome of long needle trajectory aspiration and injection.

Digital mucous cysts are common, benign and highly recurrent tumors of the distal interphalangeal joints of the fingers and often associated with osteoarthritis. Multiple treatment modalities have been described, but still no consensus is stated. In the absence of degenerative changes, we promote a novel non-surgical approach. The aim of this study was to examine all patients with digital mucous cysts without underlying osteoarthritis, undergoing this injection technique and to assess outcome and complications of this procedure. This was a single center study (2018-2019) of 17 patients who received a long needle trajectory aspiration and injection for treatment of digital mucous cysts. Exclusion criteria were prior surgical treatment, post-traumatic cyst formation and the presence of radiographic distal interphalangeal joint osteophytosis. A total of 15 patients were found eligible for inclusion. The patient reports were retrospectively analyzed with a follow-up of 6 months. The primary study outcome was resolution of the cyst; secondary outcomes were complications of the procedure. Twelve (80%) resolved completely and three (20%) had limited local recurrence at 6 months. No complications were reported. None of the patients with limited recurrence desired further treatment. We believe that this technique offers a non-invasive, low-cost treatment option for digital mucous cysts, particularly in the subset of patients with ample evidence of degenerative articular changes in the distal interphalangeal joint. The described technique can be performed in an office-based setting and avoids typical surgical as well as aspiration-associated complications.

Shortening arthrodesis combined with limited fasciectomy in severe recurrent Dupuytren's disease of the fifth finger.

OBJECTIVE: Management of recurrent Dupuytren's disease of the little finger is challenging. Various treatment modalities have been proposed: external fixation, local skin flap, dermofasciectomy, or even amputation. An alternative surgical technique was introduced by Honecker et al. in 2016 and refined by Raimbeau et al. in 2019, consisting in resection of the middle phalanx and shortening arthrodesis. We modified the technique by combining arthrodesis with a limited fasciectomy of the abductor and/or pretendinous cord in the fifth ray to improve cosmetic and functional outcomes. METHODS: Patients with severe recurrent Dupuytren's disease of the little finger (Tubiana stage III/IV) were treated with proximodistal interphalangeal arthrodesis, combined with limited fasciectomy. Range of motion was assessed preoperatively and postoperatively. QuickDASH and a VAS were assessed to determine overall function and pain respectively. Radiographic evaluation was made at 6 and 12 weeks postoperatively. RESULTS: Thirteen patients were eligible for inclusion. Mean age was 69 years (range 49-87). Radiographic consolidation was obtained at a mean 58 days (range 27-97). Full extension of the metacarpophalangeal joint was achieved in 11 patients and full adduction in 12. Mean active flexion was 94° (range 90-100). QuickDASH scores decreased from 18 to 12 after surgery. Pain scores were low and unchanged. CONCLUSION: By combining proximodistal interphalangeal arthrodesis with limited fasciectomy through a volar approach, finger extension improved, and fixed abduction was also treated. The combined volar and dorsal approach did not induce vascular impairment or other complications.

Symptomatic bifid insertion of the Flexor Carpi Radialis Brevis.

A 35 year-old right-handed female presented with persistent wrist pain lasting two years. Imaging disclosed an accessory tendon-shaped structure, identified as a Flexor Carpi Radialis Brevis, strangling the Flexor Carpi Radialis tendon at the wrist during effort. Surgical exploration found the insertion of the Flexor Carpi Radialis Brevis to be bifid. Resection of the stenosing branch and the fibrotic tendon sheath restored strength in the right wrist and painless symmetrical motion compared to the left wrist ten weeks postoperatively.

Radiological imaging of the trapeziometacarpal joint: a historical and clinical perspective.

The opposable thumb provides both stability and mobility and is needed to accomplish different prehensile tasks. The trapezium is a complex bone, with a distal articular surface that is convex in the sagittal plane of the thumb and concave in the coronal plane of the thumb. The numerous additional articulations with the carpus and the oblique orientation to the main plane of the hand makes it difficult to evaluate the trapeziometacarpal joint using standard hand or wrist radiographic views. This review gives an overview of the different radiological views that have been described for the thumb with an emphasis on their historical origin and positioning during radiography. We also describe different measurements and classifications that can be obtained using different thumb radiographs.

Defining trapezial dysplasia - analysis of trapezial inclination in a normal population.

We assess the distribution of trapezial inclination in a young population in order to propose a threshold for trapezial dysplasia. One hundred peritrapezial views were reconstructed from wrist computed tomography scan datasets to measure trapezial inclination. Seventy peritrapezial views were constructed from 10 datasets to assess the influence of radiograph rotation. Mean trapezial inclination in our population was 8° (range 0.2-17.9). Fifteen degrees of radiographic pronation or supination did not alter trapezial inclination significantly. Intra-rater consistency and absolute agreement had an interclass correlation (ICC) of 0.95. Inter-rater consistency and absolute agreement had an ICC of 0.88. Trapezial inclination is a reliable measurement for trapezial dysplasia with an excellent intra-rater and good inter-rater reliability and does not change significantly with 15° of radiographic pronation or supination. These normal values can be used to propose a threshold for trapezial dysplasia in the management of trapeziometacarpal joint instability in the younger population.Level of evidence: IV.

Minimally Invasive Pronator Quadratus Sparing Approach versus Extended Flexor Carpi Radialis Approach with Pronator Quadratus Repair for Volar Plating in Distal Radial Fractures.

Background Several volar plating techniques exist to treat distal radial fractures. Question We investigated minimally invasive plate osteosynthesis (MIPO) with pronator quadratus (PQ) sparing versus conventional flexor carpi radialis approach for volar plating with PQ repair after distal radial fractures during the first postoperative year. Patients and Methods Prospective data of two consecutive cohorts were compared: 62 patients in MIPO group with an average age of 61.2 years and 66 patients in PQ repair group with an average age of 61.4 years completed the entire follow-up period. Results Range of motion was not significantly different, except flexion-extension that was significantly higher in the MIPO group. Quick Disabilities of the Arm, Shoulder and Hand was significantly lower in the MIPO group. Pain visual analogue scale was only significantly lower at 6 weeks. Grip strength measurements and patient satisfaction were not significantly different. Conclusions MIPO volar plating with PQ sparing is a surgical technique that can be chosen according to surgeon's preference and expertise, resulting in a better flexion-extension mobility and function score according to our study. Level of evidence This is a Level 3 study.

Ivory Arthroplasty for Trapeziometacarpal Joint Arthritis in Men: Analysis of Clinical Outcome and Implant Survival.

Background: Trapeziometacarpal arthroplasties are designed to restore an adequate level of mobility, stability, and grip strength. In this article, pain and functional and radiographic outcome of Ivory arthroplasty in male patients are investigated. Methods: Between 2005 and 2012, the Ivory arthroplasty was inserted in 21 male patients with degenerative trapeziometacarpal osteoarthritis, of which 14 patients were found eligible for inclusion. Mobility, grip strength, patient self-assessment (pain; Quick Disabilities of the Arm, Shoulder, and Hand [QuickDASH]), and radiographic outcome were measured. Twenty-two female patients who received an Ivory arthroplasty between 2005 and 2007 were included and underwent the same evaluation. Age at primary surgery, survival rate of the implant, and clinical outcome were compared between the 2 groups. Results: In both groups, QuickDASH score and mean pain sensation improved significantly. The improvement in mobility obtained significance in the female group. In the male group, 7 arthroplasties failed (mean follow-up of 65 months). In the female group, 3 of the 24 arthroplasties failed (mean follow-up of 123 months). Kaplan-Meier survival analysis demonstrated a significant lower implant survival in the male group. Conclusions: Decrease in muscle mass and decline in grip strength that postmenopausal women tend to experience might explain the significant difference in implant survival between sexes. In 4 of the 7 failed arthroplasties in the male group, no surgical revision was required. Trapeziometacarpal arthroplasty, even after radiographic failure, still served as a spacer, avoiding collapse of the thumb base. Nevertheless, the failure rate of the Ivory arthroplasty in male patients is high, and an alternative treatment should be considered.

Extrinsic and Intrinsic Ligaments of the Wrist.

Carpal stability depends on the integrity of both intra-articular and intracapsular carpal ligaments. In this review, the role of the radial-sided and ulnar-sided extrinsic and intrinsic ligaments is described, as well as their advanced imaging using magnetic resonance arthrography (MRA) and contrast-enhanced magnetic resonance imaging (MRI) with three-dimensional (3D) scapholunate complex sequences and thin slices. In the last decade, the new concept of a so-called "scapholunate complex" has emerged among hand surgeons, just as the triangular ligament became known as the triangular fibrocartilage complex (TFCC).The scapholunate ligament complex comprises the intrinsic scapholunate (SL), the extrinsic palmar radiocarpal: radioscaphocapitate (RSC), long radiolunate (LRL), short radiolunate (SRL) ligaments, the extrinsic dorsal radiocarpal (DRC) ligament, the dorsal intercarpal (DIC) ligament, as well as the dorsal capsular scapholunate septum (DCSS), a more recently described anatomical structure, and the intrinsic palmar midcarpal scaphotrapeziotrapezoid (STT) ligament complex. The scapholunate (SL) ligament complex is one of the most involved in wrist injuries. Its stability depends on primary (SL ligament) and secondary (RSC, DRC, DIC, STT ligaments) stabilizers.The gold standard for carpal ligament assessment is still diagnostic arthroscopy for many hand surgeons. To avoid surgery as a diagnostic procedure, advanced MRI is needed to detect associated lesions (sprains, midsubstance tears, avulsions and chronic fibrous infiltrations) of the extrinsic, midcarpal and intrinsic wrist ligaments, which are demonstrated in this article using 3D and two-dimensional sequences with thin slices (0.4 and 2 mm thick, respectively).

A Modified Extensor Carpi Ulnaris Tenodesis with the Sauvé-Kapandji Procedure.

Background: Since the Sauvé-Kapandji procedure was introduced in 1936, many modifications were created using dynamic stabilizer, such as the ECU (extensor carpi ulnaris), the FCU (flexor carpi ulnaris), pronator teres to solve proximal ulnar stump pain. We believe that this modification is also another option for distal ulnar stump instability. Methods: From January 1998 to February 2017, there were 13 patients received the Sauvé-Kapandji (S-K) procedure with tenodesis of the ECU to the carpus and interosseous membrane. The average age at operation was 52 years (range, 28 to 63 years). Four had traumatic arthritis (two from distal radial fracture malunion, two had instability of distal radioulnar joint from Essex-Lopresti injury), four had primary osteoarthritis of the distal radio-ulnar joint, two had rheumatoid arthritis, one had gouty arthritis, two had madelung deformity. The average follow-up was 30 months (range, 15 to 72 months). Results: Postoperative pronation/supination of the forearm had significantly improved with the exception of the wrist flexion/extension. After surgery, the mean radioulnar distance was narrowed from 11 mm to 9 mm, but no significant difference in 12 patients. All patients had improved in wrist pain, 10 patients had no pain and 3 patients with mild pain over the distal ulnar stump. The mean grip strength had significantly improved from 51% of the contralateral side to 75%. The lateral and stress X-ray films showed no instability of the distal ulnar stump after surgery. Conclusions: In conclusion, the modified S-K procedure using the tenodesis of ECU provides a multi-directional stability and is a reliable surgical procedure for distal radioulnar disorders.

In Vitro Comparison between the Pulvertaft Weave and the Modified Core Suture Pulvertaft Weave.

Background: The Pulvertaft weave was described more than 50 years ago and is still used in tendon transfers. The aim of this study was to evaluate the strength of a modified core suture Pulvertaft weave technique and compare it to the original Pulvertaft weave traditionally used in tendon transfer surgery. Methods: 12 extensor pollicis longus tendons and extensor indices proprius tendons were harvested from fresh frozen cadavers. Six Pulvertaft weaves were performed using FiberWire 4.0 and six core suture tendon weave were performed using FiberLoop 4.0. Biomechanical analysis was performed and stifness, first failure load and ultimate failure load were measured for both set of repairs. Results: The stiffness of the core suture tendon repair (9.5 N/mm) was greater than that of the Pulvertaft repair (2.5 N/mm) The first failure load of the core suture tendon repairs (68.9 N) was greater than the Pulvertaft repairs (19.2 N) and the ultimate failure load of the core suture tendon repairs (101.8 N) was greater than the Pulvertaft repairs (21.9 N). All of these differences were statistically significant. Conclusions: The core suture Pulvertaft weave is a modification to the Pulvertaft weave used in tendon transfers. The results of this cadaveric study suggest it is 5 times stronger than the traditional Pulvertaft repair, potentially allowing it to be used with early active motion protocols after tendon transfers.

Avascular necrosis of the lunate secondary to perilunate fracture dislocation: Case report and review of the literature.

This is a 39-year-old male, fell from a bike, left wrist with trans-styloid perilunate fracture dislocation that underwent open reduction internal fixation, 20 months after surgery the patient developed avascular necrosis of the lunate, final wrist fusion was performed secondary to the arthritic changes on the wrist. Anatomic dissection was performed and vascularity of the lunate was identified, its origin is from the volar palmar arch, when dislocated palmarly and more than 90 degrees the vessel is still intact. More than 512 patients with perilunate dislocation and perilunate fracture dislocation are included we identified in the literature transient avascular necrosis of the lunate in nine and seventeen of pure avascular necrosis of the lunate. Concluding that avascular necrosis of the lunate after perilunate dislocation or perilunate fracture dislocation is an infrequent finding especially when the volar ligaments are intact.

Hypodermic needle fixation without fluoroscopy versus k-wire fixation with fluoroscopy for distal phalangeal fractures: a comparative study.

BACKGROUND: Distal phalanx fractures are frequently encountered in our daily practice. They are often caused by crush injuries and are the most frequent work-related hand fractures. Different types of fixation have been proposed for displaced fractures. METHODS: A retrospective study was performed on two fixation types. Twenty-four distal phalanx fractures were treated with k-wire fixation with fluoroscopic control in a main operating room setting. Twenty-five distal phalanx fractures were treated with hypodermic needle fixation without fluoroscopic control in an emergency treatment room setting. Clinical and radiological data were collected on fracture type, fracture healing and complications. The cost of both types of surgery was assessed. RESULTS: No significant difference in healing time, union, delayed union and non-union was found between the two groups. Loosening was significantly more frequent in the hypodermic needle group, without affecting clinical or radiographic outcome. No infections were encountered in both groups. Surgery performed in the emergency treatment room reduced the cost with 9000 dollars when compared to surgery performed the main operating room. CONCLUSION: Treatment of displaced distal phalanx fractures with hypodermic needle fixation yields good results. Performing this procedure in a treatment room is safe and might reduce operative time, institutional costs and radiation exposure for both surgeon and patients.

Percutaneous Tenodermodesis for Mallet Fingers: An Office-based Procedure.

Mallet fingers are injuries to the extensor tendon at the distal interphalangeal (DIP) joint and can present as a bony avulsion or as a soft tissue injury. Nonbony mallet fingers are frequently splinted in extension between 6 and 8 weeks. If splinted correctly, most results are good with a mean DIP joint extension lag between 5 and 10 degrees. However, decreased swelling, hygienic considerations and patient compliance can lead to splint removal and a less favorable outcome. We present a percutaneous tenodermodesis using only a digital block and a 4.0 nylon suture. This office-based procedure provides joint reduction and prevents joint movement during the immobilization period. The suture can be removed after 8 weeks, allowing active mobilization of the DIP joint. We present the results of 8 patients with a mean follow-up of 3 months and mean initial extension lag of 32 degrees, resulting in a mean final extension lag of 2 degrees and excellent outcomes using the Crawford criteria.