Repair of foveal detachment of the triangular fibrocartilage complex: open and arthroscopic transosseous techniques

Robot-assisted transosseous repair of triangular fibrocartilage complex: a cadaver study

The feasibility and accuracy of robot-assisted bone tunnel construction in the transosseous repair of the triangular fibrocartilaginous complex (TFCC) were compared with those of freehand arthroscopic repair. A total of 20 cadaveric specimens were randomized into robotic-assisted and arthroscopy-guided groups. Three bone tunnels were constructed in the ulnar foveal region in each specimen. The discrepancy between the planned and actual tunnel exits was determined in the robot-assisted group by merging images. The success rate of tunnel construction, time consumption and number of drilling attempts were compared between groups. The median planned/actual exit discrepancy was 0.8 mm in the robot-assisted group, with 90% of tunnel exits successfully placed in the footprint region, compared to 63.3% in the arthroscopy-guided group. The robot-assisted group spent less time and required fewer drilling attempts to construct bone tunnels. These results indicated that the robot-assisted technique can accurately construct multiple bone tunnels in the foveal region and reduce the difficulty of TFCC transosseous repair.Level of evidence: III.

Arthroscopically assisted repair of foveal triangular fibrocartilage complex tear using modified "double loop suture" - a retrospective cohort study

BACKGROUND

The triangular fibrocartilage complex (TFCC) plays an important role in distal radioulnar joint (DRUJ) stabilization, and is frequently torn. In particular, when conservative treatment fails, surgical treatment is needed.

METHODS

In this retrospective study, fourteen individuals with TFCC foveal tears and DRUJ instability were admitted to the department and treated with arthroscopic-assisted modified "double loop suture" transosseous repair between January 2021 and 2023. During surgery, an osseous tunnel was established, and two nickel-based alloy loops and a 2-0 polydioxanone II (PDS II) suture were used to achieve anatomic repair of the tear. All patients received supervised rehabilitation exercises after surgery.

RESULTS

The patients were followed for an average of 15 months. The mean visual analog scale (VAS) score, which was used to assess the pain intensity experienced by patients using their affected hand, significantly decreased from 5 (95% CI 4-6) points preoperatively to 2 (95% CI 1-3) points at the final follow-up (p < 0.05). The grip strength and Disabilities of the Arm, Shoulder, and Hand (DASH) score before surgery were 17 (95% CI 13-22) kg and 35 (95% CI 26-44) points, respectively, compared with 21 (95% CI 16-25) kg and 16 (95% CI 9-22) points at the final follow-up (p < 0.05). The median Patient-Rated Wrist Evaluation (PRWE) score was 28 (IQR 21, 48) before surgery, which then significantly decreased to 10 (IQR 6, 15) at the final follow-up. The mean flexion‒extension range of the wrist significantly increased from 111 (95% CI 100-122) degrees before surgery to 116 (95% CI 106-126) degrees postsurgery (p < 0.05), and the mean pronation‒supination range of the forearm significantly improved from 125 (95% CI 110-140) degrees to 135 (95% CI 121-149) degrees at the final follow-up assessment (p < 0.05). None of the assessed individuals exhibited DRUJ instability, as evaluated by the ballottement test or developed surgery-related complications such as postoperative infection, injury to the dorsal branch of the ulnar nerve or iatrogenic ulnar styloid fracture caused by the establishment of an osseous tunnel.

CONCLUSION

Arthroscopic-assisted modified "double loop suture" is a secure and efficient approach for achieving anatomic repair of TFCC foveal tears, with satisfactory functional improvement and DRUJ stability restoration.

Ulnar Impaction Syndrome and TFCC Injury: Their Relationship and Management

Ulnar-sided wrist pain can be caused by a number of problems, including ulnar impaction syndrome (UIS) and triangular fibrocartilage complex (TFCC) injury. Multiple studies have described the diagnostic criteria for UIS and TFCC injuries, and excellent surgical outcomes have been reported for each condition. Few studies have examined the extent to which the two independent conditions cooccur, and little is known about their relationship. Based on theories in the literature and clinical experience, we propose the possibility of TFCC injury as the cause and result of UIS in this review.

Arthroscopic foveal reattachment of triangular fibrocartilage complex: Inside-out technique at specific ulnocarpal anatomical landmarks

This study evaluates the outcomes of arthroscopic triangular fibrocartilage complex (TFCC) foveal reattachment using an inside-out suture passing through the TFCC at specific ulnocarpal anatomical landmarks to grasp the radioulnar ligaments. Thirty-eight patients with a mean age of 36 years (range 19-54), diagnosed with TFCC injury with distal radioulnar joint (DRUJ) instability, underwent arthroscopic inside-out TFCC foveal reattachment using designated suture sites. At a mean follow-up of 32 months (range 26-44), pain score, range of motion, grip strength, Disabilities of the Arm, Shoulder and Hand (DASH) score, and Modified Mayo Wrist Score all showed significant improvement after surgery. The DRUJ stability was restored and the minimal clinically important difference threshold for the DASH score was achieved in all patients. Arthroscopic TFCC foveal reattachment using the inside-out technique at specific ulnocarpal anatomical landmarks provided reliable outcomes and could be considered as another straightforward procedure for treating TFCC injuries with DRUJ instability.Level of evidence: IV.

Arthroscopic algorithm for acute traumatic triangular fibrocartilage complex (TFCC) tears

The triangular fibrocartilage complex (TFCC) is crucial for stability and acts as a shock absorber and load transmitter at the distal radioulnar joint (DRUJ). It is often injured in wrist trauma, particularly in young athletes. Clinical assessment involves patient history, physical examination, and imaging modalities like MRI, with wrist arthroscopy as the gold standard for diagnosing TFCC tears. Multiple classification systems categorize TFCC tears based on location and arthroscopic appearance, guiding treatment decisions. Surgical options are recommended for tears refractory to conservative management or severe tears. Despite numerous arthroscopic treatments available in the literature, this article aims to simplify the approach. It presents the authors' surgical algorithm for managing acute traumatic TFCC tears arthroscopically. The choice of technique depends on the lesion's location, with various options for peripheral and foveal tears. Post-operative rehabilitation is crucial for optimal recovery. This article provides a comprehensive review of acute traumatic TFCC injuries, covering anatomy, classification, assessment, and treatment options. Emphasis is placed on accurate diagnosis and appropriate arthroscopic management through a structured approach.

Editorial Commentary: Symptomatic Recurrent Instability of the Distal Radioulnar Joint After Triangular Fibrocartilage Complex Repair in Patients With Ulnar-Sided Wrist Pain May Be Related to Generalized Laxity

An unstable distal radioulnar joint can cause ulnar-sided wrist pain. Stability of the distal radioulnar joint, which varies among individuals, is dependent on the bony structure of the sigmoid notch and the surrounding soft tissues, such as the interosseous membrane, the extensor carpi ulnaris tendon, the pronator quadratus, and the deep radioulnar ligaments. In particular, avulsions of the deep radioulnar ligaments lead to instability and disturbed wrist proprioception. In patients with ulnar-sided pain, a distiction must always be made between clinical instability and generalized laxity. Treatment of instability, in most cases, is open or arthroscopically assisted repair of the triangular fibrocartilage complex. Postoperatively, while a degree of instability can return, symptoms typically do not. Symptom recurrence may be related to generalized joint laxity. Need for reoperation, with a goal of inducing stabilizing scar tissue, is based on severity of symptoms, and experience shows that cases with early onset of recurrent symptoms are more likely to require revision.

Over-the-Top Foveal Triangular Fibrocartilage Complex Repair

There are many techniques that address triangular fibrocartilage complex foveal injuries, which are typically performed with an outside to inside technique. In this article, we describe an inside to outside triangular fibrocartilage complex repair technique that may result in more accurate suture passage and mitigate the risk of fracture from ulna tunnels.

Triangular Fibrocartilage Complex (TFCC) - Anatomy, Imaging, and Classifications with Special Focus on the CUP Classification

The TFCC consists of several components whose functional significance has been recognized in detail in recent years. Existing classifications are partly incomplete. In addition, the TFCC requires specific and dedicated imaging techniques.This review describes the anatomy and pathoanatomy of the TFCC. The different types of TFCC lesions on MRI as well as MR and CT arthrography are explained and compared with the current literature. In addition, the novel CUP classification is presented and illustrated with image examples.Anatomically and functionally, the articular disc and radioulnar ligaments with their ulnar insertions and the inhomogeneously structured TFCC periphery must be differentiated. For accurate imaging, thin slices with high in-plane resolution and techniques to optimize contrast are required. Plain MRI is exclusively dependent on T2 contrast, while gadolinium-enhanced MRI offers the additional benefit of focal contrast enhancement, e.g., of fibrovascular repair tissue at the lesion site. However, the reference standard continues to be MR and CT arthrography, which should be used for focused indications. The CUP classification, which allows a comprehensive description and categorization of TFCC lesions, is presented and illustrated. · Anatomically, the TFCC consists of the central ulnocarpal disc, the dorsal and palmar radioulnar ligaments, and the ulnocarpal joint capsule including intracapsular ligaments and the meniscus homologue.. · The most important restraining structure of the TFCC is the lamina fovealis, which stabilizes the DRUJ. This structure constitutes the proximal (deep) continuation of the radioulnar ligaments at the ulnar insertion.. · Imaging of the TFCC requires high spatial and contrast resolution due to its minute structures. MR and CT arthrography are the reference standard in imaging.. · The CUP classification clearly describes all structures of the TFCC with the categorization of individual or combined lesion patterns.. · Schmitt R, Kunz AS, Reidler P et al. Triangular Fibrocartilage Complex (TFCC) - Anatomy, Imaging, and Classifications with Special Focus on the CUP Classification. Fortschr Röntgenstr 2024; DOI 10.1055/a-2411-8444.

Current concepts and new trends in management of isolated triangular fibrocartilage complex injuries

The triangular fibrocartilaginous complex is made of multiple components, of which the palmar and dorsal radioulnar ligaments play an important role in distal radioulnar joint stability. The ulnar wrist ligaments may be injured during forearm and wrist trauma. There are several aspects of triangular fibrocartilaginous complex management that are still open to debate. The aim of the present study was to review the current concepts and discuss emerging trends to better elucidate and treat this important ligament complex.Level of evidence: V.

Advancements in Diagnosis and Management of Distal Radioulnar Joint Instability: A Comprehensive Review Including a New Classification for DRUJ Injuries

Distal radioulnar joint (DRUJ) instability is a complex condition that can severely affect forearm function, causing pain, limited range of motion, and reduced strength. This review aims to consolidate current knowledge on the diagnosis and management of DRUJ instability, emphasizing a new classification system that we propose. The review synthesizes anatomical and biomechanical factors essential for DRUJ stability, focusing on the interrelationship between the bones and surrounding soft tissues. Our methodology involved a thorough examination of recent studies, incorporating clinical assessments and advanced imaging techniques such as MRI, ultrasound, and dynamic CT. This approach allowed us to develop a classification system that categorizes DRUJ injuries into three distinct grades. This system is intended to be practical for both clinical and radiological evaluations, offering clear guidance for treatment based on injury severity. The review discusses a range of treatment options, from conservative measures like splinting and physiotherapy to surgical procedures, including arthroscopy and DRUJ arthroplasty. The proposed classification system enhances the accuracy of diagnosis and supports more effective decision making in clinical practice. In summary, our findings suggest that the integration of advanced imaging techniques with minimally invasive surgical interventions can lead to better outcomes for patients. This review serves as a valuable resource for clinicians, providing a structured approach to managing DRUJ instability and improving patient care through the implementation of our new classification system.

Arthroscopic dual-bone tunnel repair for palmer type IB injuries of the triangular fibrocartilage complex

BACKGROUND

Triangular fibrocartilage complex (TFCC) injuries, especially Palmer type IB, pose surgical management challenges due to associated distal radial ulnar joint (DRUJ) instability. Traditional surgeries entail risks of complications. Arthroscopic repair presents advantages but lacks consensus on optimal techniques. To evaluate arthroscopic dual-bone tunnel repair in patients with Palmer type IB TFCC injuries of the wrist.

METHODS

In this retrospective case series, grip strength ratio, joint range of motion, pain visual analogue scale (VAS), modified Mayo wrist score, and Disabilities of the Arm, Shoulder, and Hand (DASH) scores were assessed before and 12 months after surgery.

RESULTS

The cohort consisted of 45 patients. At 12 months, the grip strength ratio improved from 0.71 ± 0.08 to 0.93 ± 0.05 (P < 0.001), and wrist joint rotation increased from 126.78 ± 13.28° to 145.76 ± 8.52° (P < 0.001). VAS (1.60 ± 0.58 vs. 6.33 ± 0.91, P < 0.001), DASH (12.96 ± 3.18 vs. 46.87 ± 6.62, P < 0.001), and modified Mayo wrist (88.11 ± 4.43 vs. 63.78 ± 7.99, P < 0.001) scores all improved after surgery. The overall complication rate was 4.44%.

CONCLUSION

Arthroscopic dual-bone tunnel repair appears to be an effective intervention for alleviating wrist pain, restoring stability, and enhancing joint function in patients with TFCC Palmer type IB injuries.

Styloid Ulna Window Approach for Repair of Avulsed Foveal Attachment of Triangular Fibrocartilage Complex

PURPOSE

To describe a surgical approach for open repair of the triangular fibrocartilage complex foveal avulsion via ulnar styloid osteotomy, and to assess its clinical results.

METHODS

We reviewed 12 patients with distal radioulnar joint (DRUJ) instability due to isolated foveal avulsion of DRUJ ligaments. Wrist arthroscopy was conducted for all patients to exclude the presence of concomitant tear of the superficial part of the triangular fibrocartilage complex and to corroborate the diagnosis with a positive hook test. Through an ulnar approach between flexor and extensor carpi ulnaris, an ulnar styloid osteotomy was performed under image intensifier control just ulnar to the fovea of the head of the ulna. The avulsed foveal attachment was anchored through transosseous sutures passing from the fovea to the neck of the ulna. The ulnar styloid was fixed by means of screws or tension band wires. Outcome measures included clinical assessment of pain (visual analog scale), grip strength, DRUJ instability, range of motion of the wrist, and modified Mayo wrist score. Radiographic assessment was done to determine union of the ulnar styloid osteotomy, DRUJ subluxation, and any hardware-related problems.

RESULTS

Outcome measures were evaluated after a mean follow-up of 21 months. Healing of the osteotomy was obtained in all cases by 11 weeks. The DRUJ laxity, visual analog scale, and modified Mayo wrist score improved, while grip strength and range of motion remained unchanged. One patient had prominent hardware necessitating removal after union of the osteotomy. There were no reported cases of injury or neuropraxia of the dorsal cutaneous branch of the ulnar nerve.

CONCLUSIONS

Open repair of an avulsed foveal attachment of the triangular fibrocartilage complex using an ulnar styloid osteotomy is an alternative to either open or arthroscopic repair approaches.

TYPE OF STUDY/LEVEL OF EVIDENCE

Therapeutic IV.

Effect of dorsal capsular imbrication on intraoperative DRUJ instability following arthroscopic TFCC repair surgery

BACKGROUND

To assess the clinical outcomes and identify the ideal indication for implementing dorsal distal radioulnar joint (DRUJ) capsular imbrication after triangular fibrocartilage complex (TFCC) repair in cases of DRUJ instability.

METHODS

We conducted a retrospective study on patients who underwent arthroscopic TFCC repair between 2016 and 2021. Inclusion criteria comprised a symptomatic ulna fovea sign for over 6 months and dorsal DRUJ subluxation on magnetic resonance imaging. A total of 225 patients were divided into two groups: Group 1 (135 cases) with a negative ballottement test after "Cross-form TFCC repair" (CR) and Group 2 (90 cases) with a positive ballottement test after "Cross-form TFCC repair" and augmented DRUJ stability through dorsal DRUJ capsular imbrication (CR + DCI). Pain visual analog scale score (VAS), grip strength, modified Mayo Wrist Score (MMWS), wrist range of motion (ROM), and patient-reported outcomes (PROMs) were assessed for a minimum of 3 years postoperatively.

RESULTS

Both groups showed significant improvements in pain VAS score, grip strength, wrist ROM, MMWS, and PROMs between the preoperative and postoperative periods (all P < 0.05). Recurrent DRUJ instability occurred in 3.7% and 1.1% of patients in the "CR" and "CR + DCI" groups, respectively, with a significant difference. Despite the "CR + DCI" group initially exhibiting inferior ROM compared with the "CR" group, subsequently, no significant difference was noted between them.

CONCLUSIONS

Dorsal DRUJ capsular imbrication effectively reduces postoperative DRUJ instability rates, enhances grip strength, and maintains wrist ROM in patients with a positive intra-operative ballottement test after arthroscopic TFCC repair.

Foveal Triangular Fibrocartilage Complex Tear Repair With Nonabsorbent Suture Tape

PURPOSE

Arthroscopic repair is performed for fovea injuries of the triangular fibrocartilage complex (TFCC) when instability of the distal radioulnar joint results in pain, decreased grip strength, and mechanical symptoms. During TFCC repair, reconstruction of its attachment to the fovea is important. Nonabsorbent suture tapes have gained attention for ligament repair in the trapeziometacarpal joint, scapholunate ligament, and thumb metacarpophalangeal ligament. However, there are no reports of TFCC repair using suture tapes. We evaluated the early postoperative results of this approach.

METHODS

Participants underwent arthroscopic suture tape repair of foveal TFCC tears and were observed for more than 1 year. All repairs were performed using suture tapes and an outside-in technique with a bone tunnel from the ulnar shaft to the fovea. The postoperative complications, postoperative wrist range of motion, grip strength, and the Modified Mayo Score were evaluated.

RESULTS

Arthroscopic repair with a suture tape was performed for 20 hands using the outside-in technique. The ranges of motion for the operated and nonoperated hands were comparable 1 year after surgery (pronation, 84° ± 4°; supination, 83° ± 4°). The mean grip strength improved from 65% ± 13% before surgery to 89% ± 9% after a year. The mean Modified Mayo Score improved from 58 ± 11 before surgery to 91 ± 8 after a year. Postoperative complications included abnormal sensation of the dorsal ulnar side in 2 hands.

CONCLUSIONS

After using a suture tape to attach the TFCC to the fovea, satisfactory function was achieved in the early postoperative period with grip strength restoration. For the repair of foveal TFCC tears, attachment to the ulnar fovea is important, and repair by a suture tape may be useful.

TYPE OF STUDY/LEVEL OF EVIDENCE

Therapeutic IV.

Arthroscopy-assisted Procedures in Hand and Wrist Surgery: An Update. Where Are We So Far?

Wrist and hand arthroscopy, despite being an old tool, has gained popularity and advanced in assisting in the treatment of various injuries and conditions in the region in recent years. Dorsal, volar, ulnar, and radial accessory portals are used to reach all points of the carpal and hand joints. The minimal tissue damage, lesser injury to the capsule and its mechanoreceptors, the assessment of injuries associated with the reason for surgery, and aesthetically more favorable scars have attracted many doctors and their patients. As a result, there has been an increase in publications and diversifications of arthroscopic techniques. The aim of this update article is to present the advances and the evidence available in the literature to assist readers in their decision on which technique to use in the treatment of wrist and hand conditions.

Clinical Outcomes and Failure Rate of Triangular Fibrocartilage Complex Foveal Repair Were Comparable between Arthroscopic and Open Techniques

Background: This study compared clinical outcomes between arthroscopic and open repair of triangular fibrocartilage complex (TFCC) foveal tears in chronic distal radioulnar joint (DRUJ) instability patients. Methods: A total of 79 patients who had gone through foveal repair of TFCC using arthroscopic technique (n = 35) or open technique (n = 44) between 2016 and 2020 were retrospectively analyzed. The visual analog scale (VAS) score for pain, active range of motion (ROM), grip strength, Mayo Modified Wrist Score (MMWS), Disabilities of the Arm, Shoulder, and Hand (DASH) questionnaire score, and Patient-Rated Wrist Evaluation (PRWE) score at 2-4-6-12-24 months postoperatively were compared between two groups. Results: Two years after the operation, clinical parameters (VAS, MMWS, DASH, and PRWE), grip strength, and ROM showed significant advancement in the two groups in comparison to their values measured preoperatively (p < 0.001). Nonetheless, we could not identify any statistically significant differences in the above clinical factors between the two groups. The arthroscopic group showed a better flexion-extension arc at 2 months and supination-pronation arc at 2 and 4 months than the open group (p < 0.001). There were no significant differences between the two groups at 2 years postoperatively. Ten patients (12.6%) had recurrent instability (three in the arthroscopic group and seven in the open group, p = 0.499). Similarly, both groups showed no significant difference in the return to work period. Conclusions: Arthroscopic foveal repair of TFCC provided similarly favorable outcomes and early recovery of pain and ROM compared to open repair.

Qualitative and Quantitative Anatomy of the Deep Radioulnar Ligaments' Insertion on Ulna: Cadaveric, Histologic, and MRI Study

PURPOSE

To qualitatively and quantitatively analyze the anatomic features of the insertion of deep radioulnar ligaments (RULs) and provide an anatomic basis for further studies.

METHODS

The anatomic features of deep RUL insertion were observed macroscopically in 26 cadaveric wrists, after which the size of the deep RUL footprint and distance from the center of the footprint to the ulnar-sided margin of articular cartilage of the ulnar head were each measured. Five specimens were analyzed histologically to examine the attachment of the RUL on the ulna. In addition, we evaluated 21 asymptomatic wrists from healthy volunteers using 3.0 T magnetic resonance imaging.

RESULTS

The insertion of the deep RUL was located mainly on the radial aspect of the ulnar fovea from the foveal center to the articular cartilage. The footprint of the deep RUL appeared in 3 different shapes. The maximal width, length, and area of the footprint of the deep RUL were 3.7 (95% confidence interval [CI], 3.3-4.0) mm, 8.4 (95% CI, 7.9-8.9) mm, and 26.3 (95% CI, 23.4-29.1) mm2, respectively. Histologic analyses showed the attachment of the deep RUL on the radial wall of the fovea exhibited a direct insertion with typical 4-layer structures. The deep RUL fibers formed an acute angle with the distal component of the triangular fibrocartilage complex.

CONCLUSIONS

The deep RUL was inserted on the radial side of the ulnar fovea and not the foveal center; it had direct insertion on the radial wall continuous with articular cartilage, and the fibers in the direct insertion formed an acute angle with the distal component of the triangular fibrocartilage complex.

CLINICAL RELEVANCE

Understanding the quantitative anatomy of the deep RUL insertion may help guide surgeons to perform an anatomic foveal repair of the triangular fibrocartilage complex in its native footprint.

Comparing the Outcomes of Suture Anchor Repair and Rein-Type Capsular Suture for Triangular Fibrocartilage Complex Foveal Tears With a Minimum 2-Year Follow-Up

PURPOSE

Recent biomechanical studies have highlighted the importance of foveal reinsertion when repairing triangular fibrocartilage complex (TFCC) injury with foveal tears. However, clinical studies comparing different repair techniques are scarce. We compared the clinical outcomes of suture anchor repair and rein-type capsular suture in patients with TFCC palmer 1B foveal tears with a minimum of 2-year follow-up.

METHODS

This was a single-surgeon, single-center, retrospective, comparative study. We included patients who underwent TFCC repair surgery due to a foveal tear from December 2013 to October 2018 with a minimum follow-up of 24 months. Postoperative Quick Disabilities of Arm, Shoulder, and Hand (QuickDASH) score, Modified Mayo Wrist Score, visual analogue scale for pain, wrist range of motion, and grip strength were compared. We also measured the maximal ulnar head displacement with dynamic ultrasound to quantify distal radioulnar joint stability.

RESULTS

In total, 103 patients were in the suture anchor group (group A) and 84 patients in the rein-type capsular suture group (group B). The mean follow-up time exceeded three years for both groups. There was a minimal difference regarding QuickDASH score, visual analogue scale for pain, and grip strength ratio between the two groups. The rein-type group had significantly better Modified Mayo Wrist Score. The suture anchor group showed better distal radioulnar joint stability with dynamic ultrasound, but was more limited in ulnar deviation. However, these differences are most likely clinically insignificant.

CONCLUSIONS

Both suture anchor repair and rein-type capsular suture yielded satisfactory results for TFCC 1B foveal tear in a minimum of 2-year follow-up. The functional scores were similar, and no major complications or recurrent instability were noted in either group.

TYPE OF STUDY/LEVEL OF EVIDENCE

Retrospective Therapeutic Comparative Investigation IV.

Foveal triangular fibrocartilage complex pathology: a potentially under-recognized injury

The primary aim of the present study was to present a case series of 24 patients with foveal triangular fibrocartilage complex (TFCC) injuries that were treated with arthroscopically assisted TFCC foveal repair. In total, 19 patients had a stable distal radioulnar joint (DRUJ) and five had an unstable DRUJ. Despite this, all patients were found to have a foveal tear upon DRUJ arthroscopy. Magnetic resonance imaging (MRI) scans detected only eight out of 23 patients with foveal injuries. In addition to their foveal injury, 19 of the 24 patients had additional pathology that required treatment. At a mean follow-up of 18 months, there was a statistically significant improvement in pain, range of motion, grip strength and functional scores. In this study, we demonstrate that having a stable DRUJ upon clinical examination and normal MRI findings does not rule out foveal TFCC injury and a high index of clinical suspicion is needed when managing patients with ulnar sided wrist pain.Level of evidence: IV.

An All-Arthroscopic Technique of Repairing Foveal Tears of the Triangular Fibrocartilage Complex Using a Bone Anchor-Repair Made Simple

Traumatic foveal tears of the triangular fibrocartilage complex lead to ulnar-sided wrist pain and instability, resulting in painful motion and loss of grip strength with a severe impact on the overall function of the upper limb. Surgical repair is nothing new and has traversed through the realm of open repair to arthroscopic assisted to all arthroscopic repair techniques over the many decades, with arthroscopic repairs showing better visualization, lesser trauma, and equally favorable patient outcomes. Techniques had varied from using trans osseous tunnels to bone anchors, with or without the usage of special jigs. Here, we describe a simple and fast 3 portal arthroscopic technique of repairing the torn foveal insertion of the triangular fibrocartilage complex using a bone anchor inserted under arthroscopic and fluoroscopic guidance into the fovea. Both the dorsal and volar limbs of the triangular fibrocartilage complex are repaired arthroscopically, resulting in a strong anatomic repair resulting in a stable and pain-free wrist.

A New Arthroscopic Classification of Triangular Fibrocartilage Complex Disorders

Introduction  The use of wrist arthroscopy has become a prerequisite for diagnosis and treatment of triangular fibrocartilage complex (TFCC) disorders. Since Palmer's landmark paper, many new arthroscopic descriptions of TFCC tears have been published but there is no currently available updated comprehensive arthroscopic classification of TFCC lesions. Purpose  We recently described the arthroscopic anatomy of the TFCC as viewed from a 3-4 portal. Our purpose was to propose a new TFCC disorders classification based on this new arthroscopic TFCC description. Methods  We included all currently described TFCC disorders to the best of our knowledge into our arthroscopic, functional, and vascular anatomical concept. We also included patient's specific ulnar variance and distal radial ulnar joint coronal inclination as baseline treatment-oriented parameters. The fresh or chronic, reparable or nonreparable nature of some types of TFCC tears were considered as separate parameters. Results  The proposed classification includes disc "D" (degenerative or traumatic), reins "R" (traumatic), and wall "W" (traumatic) lesions. Combined lesions of those three parts of the TFCC may be easily identified. This new classification should facilitate future analysis of isolated or combined TFCC disorders whether they are degenerative and/or traumatic. Discussion  The authors present a new three-dimensional-three-part arthroscopic updated description of TFCC disorders with relevance to etiology and treatment principles.

All-Arthroscopic Foveal Triangular Fibrocartilage Complex Tendon Reconstruction

Background In symptomatic chronic injury of ulnar-sided tear of the triangular fibrocartilage complex, reconstruction techniques involving foveal reconstruction with palmaris longus tendon graft using the method described by Bain have been described with good outcomes. Description of Technique With increasing popularity of wrist arthroscopy to address various wrist pathologies, we present our technique of arthroscopic foveal reconstruction. We also include a step-by-step description of the procedure with illustrations, with aims to aid surgeons in executing it Conclusion Unlike other arthroscopic techniques described, this involves single osseous ulnar tunnel and performed completely arthroscopically, allowing an end result similar to Bain's open technique.

Complications after arthroscopic triangular fibrocartilage complex (TFCC) surgery

Wrist arthroscopy is a valuable and widely utilized tool in the treatment of triangular fibrocartilage complex (TFCC) injuries. These procedures include synovectomy alone, peri-capsular or transosseous repair, and arthroscopic-assisted reconstruction, and each are associated with specific complications. This review describes the types of complications and their rates in different types of arthroscopic TFCC surgery reported in the literature and in our centre. Across the spectrum of arthroscopic TFCC surgery, complication rates and the learning curve increase with surgical complexity. Relevant anatomy, prevention and management of complications including nerve injury and irritation, extensor tendon injury and tendinitis, fracture, stiffness, and persistence of symptoms or instability are discussed. Vigilance to anatomical details and careful dissection can help to reduce complications that may result in disturbing pain and functional loss.

A Modified Arthroscopic Ulnar Tunnel Technique for Combined Foveal and Capsular (All-Inside) Fixation of Triangular Fibrocartilage Complex Injury

Background  Traumatic disruption of the triangular fibrocartilage complex (TFCC) is commonly present in various wrist traumas. A variation of surgical techniques is previously developed for different injury patterns. To our knowledge, only a few studies have investigated the fixation of combined foveal and capsular TFCC injuries using the ulnar tunnel technique. Purpose  This prospective cohort study of 21 patients aimed to evaluate the clinical and patient-reported outcome at 2 years of follow-up after arthroscopic TFCC of combined, foveal, and capsular reattachment by modified ulnar tunnel technique. Methods  Pain, grip strength, wrist motion, inclusive rotation, and patient-reported outcomes were assessed pre- and postoperatively at 2 years of follow-up. Results  No complications occurred preoperatively. Pain and patient-reported outcomes improved significantly ( p  < 0.0001 and 0.004). Grip strength improved, but not significantly ( p  = 0.088). The range of motion remained unchanged. All the patients achieved full stability of the distal radioulnar joint. Two patients sustained a new TFCC injury due to a wrist trauma and underwent a reoperation successfully. Two patients experienced complications: one patient experienced tenderness caused by cyst occurrence after PushLock ankers and the second had subluxation of the extensor carpi ulnaris tendon subsheet. Both patients were successfully treated and reoperated on with curettage of the cyst, and reconstruction of the extensor carpi ulnaris retinaculum. All the patients ended with good or excellent satisfaction scores. Conclusion  The ulnar tunnel technique for combined foveal and capsular injuries shows promising short-term follow-up results and high satisfaction scores in the patients. Level of Evidence  II (Prospective Corhorte).

Ligamentoplasty using the ulnotriquetral ligament with wafer procedure for chronic triangular fibrocartilage complex foveal tear: Short-tem outcome

BACKGROUND

We developed a new ligamentoplasty technique using the ulnotriquetral ligament (UTL) via a palmar approach for cases with dorsal instability of the ulna due to a foveal tear of the triangular fibrocartilage complex (TFCC). The study aimed to evaluate the clinical outcomes of this procedure.

METHODS

We retrospectively analyzed 19 cases with foveal tears of TFCC who underwent the ligamentoplasty using UTL. We harvested the UTL from the triquetrum as a pedicle graft, avoiding damage of the connection between the base of the UTL and palmar radioulnar ligament (PRUL) as possible. The graft was flipped proximally and pulled out through the bone tunnel from the ulnar fovea to the ulnar neck, then fixed to the fovea using a tenodesis screw. The function of the TFCC can be reproduced by pulling out the UTL along with the PRUL through the ulnar fovea and re-establishing the PRUL tension. Clinical results were evaluated at least 12 months following surgery. The preoperative and postoperative wrist pain level on a neumerical rating scale (NRS), the radioulnar joint (DRUJ) ballottement test, the range of motion, the grip strength, and the Patient-rated wrist evaluation (PRWE) scores were evaluated.

RESULTS

In all cases, the DRUJ ballottement test became negative at the final follow up compared with the normal side on manual examination. The pain levels significantly decreased as reflected by a decrease in NRS from 6.8 to 2.5 at final follow up (p < 0.01). The range of pronation/supination motion was improved from 149° to 157°. The mean PRWE score significantly decreased from 52.1 to 22.8 (p < 0.01). The postoperative pain level on the NRS scale of the three patients poorly improved. One case of the three with the 3 mm positive ulnar variance needed additional ulnar shaft shortening using a plate seven months after the primary procedure.

CONCLUSIONS

The ligamentoplasty using UTL efficiently restored the ulnar palmar stability in all 19 cases and significantly decreased the wrist pain and the PRWE scores.

STUDY DESIGN

Clinical, retrospective study.

A new arthroscopic repair technique for triangular fibrocartilage complex using an intracapsular suture: an outside-in transfer all-inside repair

BACKGROUND

Arthroscopic repair is a promising, minimally invasive surgical technique for patients with Palmer type 1B peripheral triangular fibrocartilage complex (TFCC) tears. Although several arthroscopic techniques are effective for repairing Palmer type 1B TFCC tears, some shortcomings remain. So, we report an arthroscopic repair technique for the treatment of Palmer type 1B Atzei class 1 TFCC tears using an intracapsular suture: an outside-in transfer all-inside repair.

METHODS

A retrospective analysis of 38 Palmer type 1B TFCC injury patients admitted to our hospital were randomly divided into 2 groups. The group A was sutured from the outside to the inside, with a total of 21 cases; the group B was sutured with the new arthroscopic repair technique, with a total of 17 cases. Observe and compare the VAS scores and modified Mayo wrist function scores of all patients before 3, and 6 months after the operation and evaluate the incidence of thread knots in patients with different treatment methods. The methodology was performed an arthroscopic intracapsular suture using an outside-in transfer, all-inside repair technique, which is a modified method of the outside-in and all-inside technique using the needle of a 10-mL sterile syringe, for Palmer type 1B TFCC tears. A No. 2 polydioxanone suture was threaded through the needle and entered the wrist joint. Next, the needle was withdrawn carefully along the suture to the proximal tear ulnar surface of the TFCC and penetrated the TFCC, exiting the articular cavity surface of the ulnar side of the torn TFCC. Finally, arthroscopic knotting was performed.

RESULTS

This new treatment was as effective as the previously arthroscopic techniques and had the advantages of no additional incision and decreased risk of operation-related complications. The incidence of thread knots in the group A (28.57%) was significantly higher than that in the group B (0%), and the difference was statistically significant (P = 0.024). There was no significant difference in VAS score and modified Mayo wrist function scores between the two groups (P > 0.05).

CONCLUSIONS

The outside-in transfer, the all-inside repair technique is suitable for Palmer type 1B Atzei class 1 TFCC tears. We recommend this technique as a useful alternative to the conventional methods of repairing Palmer type 1B TFCC tears.

Innovations in Small Joint Arthroscopy

With advancements in surgical instrumentation and techniques, the role of arthroscopic and arthroscopic-assisted surgical procedures is ever-growing. Arthroscopy offers direct, magnified visualization of pathology and reductions and is more accurate than relying on intraoperative fluoroscopy alone. It also minimizes soft tissue stripping, which is of particular importance to smaller fracture fragments whose vascularity is precarious and can be injured through open approaches.

Stabilization of the Distal Radioulnar Joint Using the TightRope Implant: A Distal Oblique Bundle Augmentation

Background  Triangular fibrocartilage complex (TFCC) injury often results in distal radioulnar joint (DRUJ) instability. However, not all patients with a ruptured TFCC have an unstable DRUJ as in these patients a distal oblique bundle (DOB) may be present. We assumed that augmentation of the DOB leads to a more stable situation following reinsertion of the TFCC. We present the clinical results of a new surgical technique using the TightRope system as a DOB augmentation. Description of Technique  All cases were treated under regional anesthesia with the TightRope implant for which a tunnel was drilled from the distal ulna through the radius along the path of the DOB. The TightRope was passed through the tunnel and secured with buttons on either side. X-rays were made during surgery to confirm correct positioning. Methods  A retrospective study was performed analyzing 21 cases treated with a TightRope augmentation of the DOB. The primary outcome was measured using the patient-rated wrist evaluation (PRWE) score at least 12 months after surgery. Results  Postoperatively, the DRUJ was stable in all patients. The median PRWE score was 16 for the injured side compared to zero for the uninjured side ( p -value: < 0.001). The median pronation and supination were not statistically significant when we compared the injured side to the uninjured side. The median grip strength was 31 kg for the injured side compared to 38 kg for the uninjured side ( p -value: 0.015). There were two minor postoperative complications (10%). Conclusion  This technique is capable of restoring DRUJ stability with a short immobilization period resulting in good patient-related outcomes and a low complication rate.

An All-arthroscopic Technique of Repair of Substance Tears of the Triangular Fibrocartilage Complex in Symptomatic Patients

Substance tears of the triangular fibrocartilage complex (TFCC) can occur secondary to trauma of the wrist. On the dorsal periphery, they are considered Palmer 1B tears or Atzei class 1 tears. If along the radial side, they can manifest as a tear of the central disc, classified as a Palmar class 1A tear. If it involves the ligaments, it is stated as a pre-1D tear as per the new classification system by Luchetti and colleagues. Multiple excellent repair techniques exist in the current literature for dorsal peripheral tears and even for those in the substance of the TFCC, whereas there are successful evolving techniques of repair of avulsed tears and those involving the substance of the ligaments on the radial side adjacent to the sigmoid notch. Here, we describe our technique of repairing substance tears of the TFCC arthroscopically without the need for any specialized equipment apart from the basic arthroscopy set. The technique was conducted in a patient with a transverse substance tear on the radial side of the triangular fibrocartilage involving the central disc with complete resolution of symptoms. It is a simple technique, which can be used to repair class 1B peripheral tears and pre-1D tears in the substance of the TFCC.

Advances in the Repair of Palmer type IB TFCC Injuries With Wrist Arthroscopy

The triangular fibrocartilage complex (TFCC) is essential for maintaining wrist stability. Injury-caused pain is the primary cause of ulnar wrist pain. The TFCC injury refractory to conservative treatment requires further surgical treatment, and because Palmer type IB tears belong to peripheral injuries due to their proximity to the blood supply area, arthroscopic suture repair has become the preferred surgical method for TFCC injury repair, exhibiting strong healing ability. This study reviewed the anatomy of TFCC, injury classification, and advances in arthroscopic suturing for treating Palmer type IB.

Relevant landmarks to navigate the suture locations for the arthroscopic triangular fibrocartilage complex foveal reattachment

INTRODUCTION

Key step of arthroscopic triangular fibrocartilage complex (TFCC) foveal reattachment is to suture dorsal and palmar deep components of radioulnar ligaments (RULs) to the fovea of ulnar head to ensure distal radioulnar joint stability. However, the deep components are covered and cannot be identified arthroscopically from standard radiocarpal joint view. Suturing sites described in previous studies have not been proved gasping of the deep components. The purpose of this study was to investigate our TFCC suture locations using relevant landmarks on securing the RULs' deep components for arthroscopic TFCC foveal reattachment.

MATERIALS AND METHODS

Wrist arthroscopy and horizontal mattress suture was performed in 20 fresh-frozen cadaver wrists. Based on close proximity of the ulnocarpal ligaments to the palmar RUL and fovea, palmar suture location was designated at the junction between ulnolunate, ulnotriquetral ligaments and palmar border of TFCC disc, whereas dorsal suture location was at dorsal border of TFCC disc, opposite the palmar location, at same distance between prestyloid recess and palmar location. The radiocarpal and ulnocarpal joint was subsequently opened to evaluate grasping of RULs' deep components and evaluate the relevant landmarks.

RESULTS

Thirty-nine of 40 (97%) RULs' deep components were successfully grasped by the sutures. With 0.98-0.99 interobserver agreement for the measurements, mean distance between sigmoid notch to suture and suture to ulnar capsule were 5.6 ± 1.1 and 4.0 ± 0.9 mm, respectively. Whereas, the dissecting point of deep component from the superficial component of the RULs was detected immediately radial to the midpoint between the sigmoid notch and the ulnar capsule (4.5 ± 0.9 mm from sigmoid notch).

CONCLUSIONS

We determined the relevant anatomical landmarks to navigate the TFCC suture locations, which reliably secure the deep components of the radioulnar ligaments for the arthroscopic TFCC foveal reattachment.

A modified arthroscopic ulnar tunnel technique for foveal triangular fibrocartilage complex injury

Arthroscopically assisted techniques for the treatment of foveal triangular fibrocartilage complex (TFCC) injuries offer a less invasive option. Reports of the ulnar tunnel technique on a larger patient population are needed. This prospective cohort study of 44 patients aimed to evaluate the clinical and patient-reported outcome after arthroscopic foveal re-attachment using a novel, modified ulnar tunnel technique. Furthermore, preoperative magnetic resonance imaging findings were compared with the findings from the arthroscopic evaluation. History of ulnar sided wrist pain, positive fovea-sign at the clinical examination and positive hook test at the surgery were the main inclusion criteria for the study. Pain, grip strength, wrist motion and patient-reported outcomes were assessed pre-and postoperatively. The follow-up of this study was 31 months (range 18-48). No complications occurred during the surgery. All outcomes improved besides the range of motion, which remained unchanged. Pain on a visual analogue scale was 63 before, and 14 after the surgery (p = .0004). Pre- and postoperative values of Disability of Arm, Shoulder and Hand Questionnaire were 41/6, respectively (p = .007). Grip strength, measured in Kilogram-force were 29 and 36, pre-and postoperatively (p = .0004). Conspicuously, all patients achieved stability. Six patients needed re-operation, three for renewed injury. Thirty-nine of 44 patients scored excellent or good on the satisfaction score. We found the devised method to be with fewer complications and with favourable results compared with other techniques for the treatment of TFCC injuries. Level of evidence: III.

Clinical Outcomes of Arthroscopic One-Tunnel Triangular Fibrocartilage Complex Transosseous Suture Repair Are Not Diminished in Cases of Ulnar Styloid Process Fracture Nonunion

PURPOSE

To determine whether clinical outcomes of arthroscopic one-tunnel wrist triangular fibrocartilage complex (TFCC) transosseous suture repair are not diminished in cases of ulnar styloid process fracture nonunion (USPFN).

METHODS

Patients who underwent arthroscopic 1-tunnel transosseous suture repair of Palmer 1B foveal TFCC tear (with/without superficial fiber tear; Atzei class 2 or 3 TFCC tear) from 2015 to 2020 were retrospectively reviewed. Group I was the TFCC foveal tear repair group with USPFN. Group II was the TFCC foveal tear repair group without USPFN. In group I, no additional treatment for USPFN was made. Functional preoperative and postoperative outcomes were compared by Modified Mayo Wrist Score (MMWS); Quick Disabilities of the Arm, Shoulder, and Hand (Quick-DASH) score; grip strength; pain visual analog scale (VAS); and distal radioulnar joint (DRUJ) stability. Wrist posteroanterior, lateral, and both oblique views of the wrist were used to assess the ulnar styloid process before and after operation.

RESULTS

This study consisted of 66 patients: group I (n = 22) and group II (n = 44). No differences were found between the 2 groups preoperatively in MMWS, Quick-DASH, grip strength, and VAS (MMWS: P = .94, Quick-DASH: P = .23, grip strength: P = .69, VAS: P = .45). No differences were found between the 2 groups with respect to outcome measures postoperatively in MMWS, Quick-DASH, grip strength, and VAS (MMWS: P = .59, Quick DASH: P = .82, grip strength: P = .15, VAS: P = .84). All of the enrolled patients achieved restored function with negative ballottement test and maintained DRUJ stability on follow-up. Of the 22 USPFN cases in group I, 11 (50%) showed spontaneous union after transosseous TFCC foveal repair without any additional USPFN treatment. The proportion of patients achieving a minimal clinically important difference for the Quick-DASH was similar between the 2 groups.

CONCLUSIONS

Although this current study has insufficient statistical power, the available data suggest that patients with TFCC foveal tear combined with USPFNs treated with arthroscopic transosseous repair surgery could experience similar functional improvement compared with those with TFCC foveal tear without USPFNs. The presence of USPFN accompanied by Palmer 1B type TFCC foveal tear may not affect the clinical results, including MMWS, Quick-DASH, grip strength, VAS, and DRUJ stability of patients who undergo arthroscopic 1-tunnel transosseous suture repair.

LEVEL OF EVIDENCE

Level III, retrospective comparative study.

Lesiones traumáticas crónicas del complejo fibrocartílago triangular: ¿Cómo enfrentarlas?

Las lesiones crónicas del complejo fibrocartílago triangular (CFCT) son una entidad que no ha sido descrita previamente como tal y no existe consenso en su manejo. La temporalidad de la lesión y su potencial de reparación son aspectos fundamentales a la hora de indicar un tratamiento. Proponemos un esquema de enfrentamiento a lesiones traumáticas crónicas del CFCT y describimos una técnica novedosa de reconstrucción con injerto de brachioradialis con asistencia artroscópica. Mostramos los resultados y el seguimiento de dos pacientes intervenidos con esta técnica.

[Operative Approaches to the distal radioulnar Joint and distal Ulna]

At the distal radioulnar joint (DRUJ) and the ulnocarpal joint several anatomical structures are in a limited space. Therefore, the operative approach has to consider the pathology to be treated. The DRUJ may be approached from the dorsal or the palmar side. Procedures to treat the arthrotically destroyed DRUJ involving bone resection of the ulnar head and destabilizing ligamentous injuries of the triangular fibrocartilage complex (TFCC) are best approached from the dorsal side. This approach allows excellent visualization of the ulnar head and the ulnar and radial attachment of the TFCC. The arthroscopic, half open refixation of the ulnar avulsion of the TFCC may be performed using a variety of limited and small approaches over the dorsal or lateral ulnar head. Pathologies with an origin at the palmar aspect of the DRUJ as the palmar dislocation of the ulnar head in the DRUJ or the shrinkage and scaring of the palmar capsule with consecutive pronation contracture require a palmar approach. Reduction and osteosynthesis of fractures in the area of the ulnar head are preformed using a lateral approach along the styloid process and the ulnar head between the flexor and the extensor carpi ulnaris tendons. Along the ulnar shaft elective ulnar shortening osteotomy as well as fracture reduction and osteosynthesis are best performed from an ulno palmar approach.

Differentiated Approaches to Treat Lesions of the TFCC Based on new arthroscopic Classification

In this article, pathology of the TFCC lesions, image diagnosis and arthroscopic examination were described. According to the radiocarpal arthroscopic findings, TFCC lesions are classified into intra-disc lesions (Class 1), radial lesion (Class 2), peripheral disc lesions which indicate slight to moderate DRUJ instability (Class 3) and degenerative lesion (Class 4). The radioulnar ligament (RUL) lesions that indicate moderate to severe DRUJ instability were classified with staging system with DRUJ arthroscopic findings (Stage 1 to 5). Author's treatment algorism with wrist arthroscopic findings including DRUJ arthroscopy was demonstrated and along with this algorism, various arthroscopic and open techniques to treat TFCC injuries were selected and resulted in success. Precise diagnosis of the TFCC lesions helped to select an adequate treatment for each lesion.Dieser Artikel beschreibt die pathologischen Veränderungen des TFCC sowie deren Befunde in der Bildgebung und Arthroskopie. Am TFCC lassen sich mittels Arthroskopie bei Sicht von radiokarpal zentrale (Typ 1), radiale (Typ 2) sowie periphere Läsionen (Typ 3), die mit einer moderaten Instabilität des distalen Radioulnargelenkes (DRUG) einhergehen, und degenerative Läsionen (Typ 4) unterscheiden. Läsionen der radioulnaren Bänder, die mit einer moderaten bis ausgeprägten Instabilität des DRUG vergesellschaftet sind, werden anhand der Befunde bei der DRUG-Arthroskopie in fünf Stadien eingeteilt. Diesen unterschiedlichen Befunden angepasst wurde ein Behandlungsalgorithmus mit verschiedenen arthroskopischen und offenen Verfahren entwickelt, der sich als erfolgreich erwies. Eine exakte Klassifizierung von TFCC-Läsionen ermöglicht die Wahl des für die jeweilige Läsion adäquaten Therapieverfahrens.

Arthroscopic-Assisted Foveal Reattachment of Triangular Fibrocartilage Complex Tears With Distal Radioulnar Joint Instability: A Comparison of Suture Anchors and Transosseous Sutures

PURPOSE

To compare the clinical outcomes of arthroscopically-assisted suture anchor repair and transosseous sutures for repair of foveal triangular fibrocartilage complex tears in patients with distal radioulnar joint (DRUJ) instability.

METHODS

Sixty patients with triangular fibrocartilage complex foveal detachment associated with DRUJ instability were prospectively recruited and randomized into 2 equal groups-the anchor repair group and the transosseous repair group. The primary outcome was DRUJ function after 2 years, which was assessed by the DRUJ evaluating system. The secondary outcomes were grip strength, visual analog scale for pain, Mayo Modified Wrist ScorePatient-Rated Wrist Evaluation score, and the Disabilities of the Arm, Shoulder, and Hand score.

RESULTS

There were no significant differences between the groups for any of the outcome measures. Good-to-excellent outcomes (according to the DRUJ evaluation system) were achieved in 27 (90%) patients in the anchor repair group and 26 (86.7%) patients in the transosseous repair group. Fewer complications were observed in the anchor repair group.

CONCLUSIONS

Both techniques yielded good and comparable outcomes with a lesser incidence of early complications in the anchor repair group.

TYPE OF STUDY/LEVEL OF EVIDENCE

Therapeutic II.

Midterm Results of Arthroscopy-Assisted "Tent Form" Triangular Fibrocartilage Complex Repair With Dorsal Distal Radioulnar Joint Capsule Imbrication for Posttraumatic Chronic Distal Radioulnar Joint Instability

PURPOSE

To evaluate the outcomes of "tent form" triangular fibrocartilage complex (TFCC) repair combined with dorsal distal radioulnar joint (DRUJ) capsule imbrication for posttraumatic chronic DRUJ instability.

METHODS

All patients treated with arthroscopic "tent form" TFCC repair and DRUJ capsule imbrication from 2016 to 2019 were retrospectively reviewed. The inclusion criteria were symptomatic chronic DRUJ instability for >6 months and dorsal DRUJ subluxation on magnetic resonance imaging. The Disabilities of the Arm, Shoulder, and Hand score, Patient-Rated Wrist Evaluation, grip strength, Modified Mayo Wrist Score, range of motion, and distal radioulnar joint stability were assessed for a minimum of 2 years postoperatively.

RESULTS

Thirty-eight patients were included in the final analysis. The average follow-up duration was 35.6 months (range, 24-48 months). The 24-month postoperative grip strengths and 3-dimensional motions of wrist were not significantly different from that of the nonoperated wrist. Compared with their preoperative status, Disabilities of the Arm, Shoulder, and Hand score, Patient-Rated Wrist Evaluation, and Modified Mayo Wrist Score indicated the significant improvement with P values of .001, .001, and .002, respectively.

CONCLUSIONS

In chronic DRUJ instability with a loosening dorsal capsule, "tent form" TFCC transcapsular repair combined with DRUJ capsule imbrication restored the integrity of TFCC and dorsal DRUJ capsule and achieved a promising outcome. We recommend this procedure as an option of treatment for patients with posttraumatic chronic DRUJ instability.

LEVEL OF EVIDENCE

IV, case series.

Editorial Commentary: Arthroscopic Capsular Repair of Wrist Triangular Fibrocartilage Complex Tears: Beware That Apparent Isolated Atzei Class 1 (Isolated Distal Component) Tears May Include a Proximal Component

Accumulating knowledge about the anatomy of the triangular fibrocartilage complex (TFCC) and its function has revealed that the foveal insertion of the TFCC plays a key role in distal radioulnar joint stability rather than the superficial fibers that insert into the ulnar styloid. Recently, the interest in torn peripheral TFCC repair has been shifting from capsular repair for Atzei class 1 to foveal repair for Atzei class 2 or 3. Most acute Atzei class 1 tears spontaneously heal without surgical repair; in contrast, in cases of sustained pain and distal radioulnar joint instability even after successful Atzei class 1 repair, the unrecognized proximal component TFCC tear concomitant with a distal component TFCC tear may exist and appropriate treatment for the proximal component TFCC tear should be combined. Although overall successful results have been reported using various repair techniques, the most important consideration is re-establishing biologic regeneration potential at the insertion site of torn TFCC.

Arthroscopic transosseous foveal footprint repair of the triangular fibrocartilage complex

Foveal disruption of the triangular fibrocartilage complex contributes to the instability of distal radioulnar joint. We have developed an arthroscopic transosseous foveal footprint repair technique, which maximizes the contact between the disrupted triangular fibrocartilage complex and its foveal footprint for better healing by using four sutures in a divergent configuration through a 1.6-mm bone tunnel. Twelve patients with triangular fibrocartilage complex foveal injuries who had undergone this repair technique were reviewed with a mean follow-up of 53 months. All patients achieved significant improvement in the modified Mayo wrist score and the Disabilities of the Arm, Shoulder and Hand score. All patients had stable distal radioulnar joints with comparable ranges of motion and grip strengths between the operated and contralateral wrists. There was no significant difference in functional score in those who were treated more than 6 months after injury.Level of evidence: IV.

Arthroscopically-Assisted Foveal Repair of the Triangular Fibrocartilage Complex: Anchor Fixation versus Trans Osseous Tunnel – A Comparative Study

Introduction The triangular fibrocartilage complex (TFCC) plays a fundamental role in the stability of the wrist, and its foveal insertion is the primary structure that performs this function. Surgical repair of the CFCT is challenging given the complexity of the anatomical structures, and arthroscopically-assisted reinsertion has shown certain benefits. The most commonly used techniques are reinsertion with anchors (RAs) and transosseous tunnels (TOs).

Objective To compare the functional results of patients with acute foveal lesion of the CFCT operated through RAs versus TOs, both with arthroscopic assistance.

Materials and methods A retrospective, observational study of patients operated on for foveal disinsertion of the TFCC. We included patients older than 18 years of age, with a traumatic history and conservative treatment lsting 3 months, with persistent pain and arthro-computed tomography (arthroCT) compatible with foveal disinsertion of the TFCC. Patients treated with the RA technique versus TOs were compared, both with arthroscopic assistance. The variables studied were pain during load according to the visual analog scale (VAS), Mayo score, and ranges of motion of the wrist. Values of p <0.05 were considered statistically significant.

Results We included 24 patients (11 in the RAs group and 13 in the TOs group) With an average age of 28.5 years, 58% of whom were male, without statistically significant differences between the groups. In the whole sample, a decrease in pain of 4.33 points (standard deviation [SD]: 1.16) on the VAS was found, with no statistically significant differences between the groups (p = 0.98). The Mayo score improved in both groups, with an average of 30.09 points (SD: 0.94) in the RAs group, and 31.92 points (SD: 1.32) in the TOs group, and this difference was statistically significant (p = 0.0004). Flexion-extension increased by 5.2° (SD: 2.3°) in the RAs group, and by 6.9° (SD: 1.32°) in the TOs group, and this difference was also statistically significant (p = 0.01). Pronation improved by 15.9° (SD: 1.7°) in the RAs group, and by 15.8° (SD: 1.72°) in the TOs group, which was not statistically significant (p = 0.46), and supination improved by 17.09° (SD: 2.46°) in the RAs group, and by 17.5° (SD: 1.61°) in the TOs group, which was statistically significant (p = 0.004).

The mean duration of ischemia was of 34.2 minutes (SD: 4.36 minutes) in the TOs group, and of 78.9 minutes (SD: 9.39 minutes) in the RAs group, and this difference was statistically significant (p = 0.000).

Discussion In the surgery for foveal reinsertion of the TFCC, both the techniques with anchors and with TOs, are effective in reducing load-bearing pain, improving the ranges of motion of the joints and the functional score. Although we found statistically significant differences between the groups regarding the Mayo score, flexion-extension and supination, these do not exceed the minimally-significant clinical differences.

Conclusion Both techniques are effective in reducing weight bearing pain and improving function and range of motion of the wrist. TO surgery has a significantly shorter ischemia time than RA surgery.

Arthroscopic Foveal Repair of the Triangular Fibrocartilage Complex Improved the Clinical Outcomes in Patients With Persistent Symptomatic Distal Radio-Ulnar Joint Instability After Plate Fixation of Distal Radius Fractures: Minimum 2-Year Follow-Up

PURPOSE

To investigate the longitudinal trend of symptomatic distal radioulnar joint (DRUJ) instability after plate fixation for distal radius fractures (DRFs), determine which factors are associated with persistent symptomatic DRUJ instability, and evaluate the postoperative outcomes of arthroscopic foveal repair of the triangular fibrocartilage complex (TFCC) in patients with persistent symptomatic DRUJ instability after plate fixation for DRF.

METHODS

All consecutive patients who underwent plate fixation for DRF between January 2014 and December 2017 and were followed up for a minimum of 1 year were included in this retrospective study. DRUJ instability was evaluated by subjective ulnar wrist pain and physical examination that included foveal sign and ballottement testing every 2 months after surgery. In patients with persistent symptomatic DRUJ instability lasting >6 months, arthroscopic transosseous foveal repair was performed with consent. Clinical outcomes were evaluated at a minimum of 2 years after surgery. The Generalized Estimating Equation model was used to analyze the incidence rate trend of symptomatic DRUJ instability.

RESULTS

Overall, 204 patients were included. The incidence of symptomatic DRUJ instability decreased gradually with time after fixation for DRF until 6 months and was maintained thereafter. Thirty-four of 204 patients (16.6%) had persistent symptomatic DRUJ instability. In multivariable analysis, only high-energy injury was an independent risk factor for persistent symptomatic DRUJ instability (P = .003; odds ratio = 3.599). Seventeen patients underwent arthroscopic foveal repair. The mean follow-up period thereafter was 28.6 months. All clinical outcomes improved significantly compared with preoperative values, and no patient had residual DRUJ instability.

CONCLUSION

In patients who had persistent symptomatic DRUJ instability for >6 months after plate fixation for DRFs, arthroscopic foveal repair of the TFCC is considered as a treatment option. Arthroscopic foveal repair of the TFCC to stabilize the DRUJ provided satisfactory clinical and functional outcomes and decreased ulnar-side pain.

LEVEL OF EVIDENCE

Level IV, retrospective case series.

Reconstruction of Triangular Fibrocartilage Complex Avulsions (Palmar 1C) with Associated Lunotriquetral and Dorsal Capsule Injury: A Case Report

CASE

A 34-year-old farmer and railroad worker injured his left wrist when working at a railroad. The resulting dorsal-ulnar wrist blow caused disabling pain. Splits and 2 subsequent surgeries failed, including an arthroscopic triangular fibrocartilage complex (TFCC) debridement and thermal ablation. Subsequently, magnetic resonance imaging documented a rare Palmer type 1C distal TFCC avulsion. Function was restored and return to farming permitted by reconstruction of the ulnotriquetral (UT) ligament using an extensor carpi ulnaris (ECU) slip.

CONCLUSION

Chronic Palmer type 1C TFCC injuries can be successfully treated with ECU reconstruction of the UT ligament.

History of Wrist Arthroscopy

Wrist arthroscopy has a rich history, drawing on contributions from around the world. Its foundation was laid in Japan with Kenji Takagi and Masaki Watanabe, who developed the arthroscope and the techniques for arthroscopy. Across several decades they advanced the optic and lighting technology, allowing the miniaturization which made wrist arthroscopy technologically feasible. A safe and standardized technique for wrist arthroscopy was evolved by Terry Whipple, Gary Poehling, and James Roth in the 1980s, and they shared this with their fellow surgeons through courses and publications. The techniques then spread across the world, leading to widespread uptake and exploration of new therapeutic possibilities. The worldwide spread of wrist arthroscopy was accelerated by the European Wrist Arthroscopy Society (EWAS), founded in 2005 by Christophe Mathoulin. The Asia Pacific Wrist Association (APWA), founded by PC Ho in 2015, also extended the progression of wrist arthroscopy. This article brings together this history and tells the global story of its development through the recollections of those involved. The manuscript includes some amazing videos of the early historical arthroscopy. There are also videos of Gary and Terry describing some of their special memories of the early politics, developments, and evolution of wrist arthroscopy.

Editorial Commentary: Symptomatic Distal Radioulnar Joint Instability After Distal Radius Fracture Fixation: Improved Outcomes With Arthroscopic Management Are Still Possible After a Trial of Nonoperative Treatment

The literature to guide clinical-decision making for the treatment of symptomatic distal radioulnar joint instability in the setting of distal radius fracture is mixed, with some advocating for surgical treatment at the time of fracture fixation and others reporting acceptable clinical outcomes with conservative management. Given this, it can be challenging to determine which treatment strategy to employ for each individual patient. For injuries that are the result of high-energy trauma or when there is persistent instability lasting 6 months or longer after fracture fixation, surgical intervention may be needed. However, a period of conservative treatment does not appear to result in poorer outcomes.

Is the Fovea Ulnaris Truly Isometric during Forearm Rotation?—An In Vivo Retrospective Analysis Using Superimpositions of Three-Dimensional Reconstructions

The fovea ulnaris is considered to be the center of rotation on the ulnar head during forearm rotation. The purpose of this study was to investigate whether the fovea ulnaris is truly isometric during forearm rotation in vivo. The three-dimensional reconstruction models of 21 wrist computed tomography images taken in supination and pronation were investigated. The models were superimposed so that the two ulnar heads were in the same position. Numerous points were set on the surface of the ulnar head with a mean distance of 0.2 mm between the nearest two points. Then, the models were superimposed with respect to the radius, and the distance between the same points on the ulnar head in pronation and supination (DFR) was measured. The rotation center was defined as the point with the shortest DFR. The isometric point was defined as a rotation center with a DFR of less than 0.2 mm. An isometric point was found in three cases and not in 18 cases. The distance the rotation center moved during forearm rotation (DFR of the rotation center) ranged from 0.1 mm to 2.4 mm. The position of the rotation center in the radioulnar direction was significantly correlated with the translation of the ulnar head and the amount of forearm rotation. The rotation center was located more ulnarly when the translation of the ulnar head or the amount of forearm rotation was greater. The isometricity of the foveal insertion of the TFCC during forearm rotation may not be consistent in vivo. The center of rotation on the ulnar head during forearm rotation appears to shift ulnarly with increasing translation of the ulnar head or forearm rotation.

Postoperative immobilization using a short-arm cast in the semisupination position is appropriate after arthroscopic triangular fibrocartilage complex foveal repair

AIMS

The aim of this study was to assess and compare active rotation of the forearm in normal subjects after the application of a short-arm cast (SAC) in the semisupination position and a long-arm cast (LAC) in the neutral position. A clinical study was also conducted to compare the functional outcomes of using a SAC in the semisupination position with those of using a LAC in the neutral position in patients who underwent arthroscopic triangular fibrocartilage complex (TFCC) foveal repair.

METHODS

A total of 40 healthy right-handed volunteers were recruited. Active pronation and supination of the forearm were measured in each subject using a goniometer. In the retrospective clinical study, 40 patients who underwent arthroscopic foveal repair were included. The wrist was immobilized postoperatively using a SAC in the semisupination position (approximately 45°) in 16 patients and a LAC in 24. Clinical outcomes were assessed using grip strength and patient-reported outcomes. The degree of disability caused by cast immobilization was also evaluated when the cast was removed.

RESULTS

Supination was significantly more restricted with LACs than with SACs in the semisupination position in male and female patients (p < 0.001 for both). However, pronation was significantly more restricted with SACs in the semisupination position than with LACs in female patients (p = 0.003) and was not significantly different in male patients (p = 0.090). In the clinical study, both groups showed improvement in all parameters with significant differences in grip strength, visual analogue scale scores for pain, modified Mayo Wrist Score, the Disability of the Arm, Shoulder, and Hand (DASH) score, and the Patient-Rated Wrist Evaluation (PRWE) score. No significant postoperative differences were noted between LACs and SACs in the semisupination position. However, the disability caused by immobilization in a cast was significantly higher in patients who had a LAC on the dominant hand (p < 0.001).

CONCLUSION

We found that a SAC in the semisupination position is as effective as a LAC in restricting pronation of the forearm. In addition, postoperative immobilization with a SAC in the semisupination position resulted in comparable pain scores and functional outcomes to immobilization with a LAC after TFCC foveal repair, with less restriction of daily activities. Therefore, we recommend that surgeons consider using a SAC in the semisupination position for postoperative immobilization following TFCC foveal repair for dorsal instability of the distal radioulnar joint. Cite this article: Bone Joint J 2022;104-B(2):249-256.

Distal radius fractures

The management of distal radius fractures has evolved considerably in the last two decades. Techniques and hardware have improved so much that the surgeon can usually assure good results in these debilitating fractures. Yet no one method can be used for all injuries, as the personality of each fracture demands a customized approach. Furthermore, what works in one age group may not work in another. For this reason, every available treatment has its own space in our options. The need for surgeons to be well versed in all techniques is critical. We offer a concise update of important evolutionary and current treatment guidelines for this common fracture.

Revolutions in arthroscopic wrist surgeries

Recent technical and technological developments in wrist arthroscopic surgery allow for advanced treatments of difficult wrist disorders. In this review, world leaders of wrist arthroscopy describe bone graft for scaphoid nonunion, transosseous repair for triangular fibrocartilage fovea avulsion, palmaris longus reconstruction of the triangular fibrocartilage, and arthroscopic reconstruction of the scapholunate and lunotriquetral ligaments.