The Diagnosis and Management of Mallet Finger Injuries

Reconstruction of Chronic Soft Tissue Mallet Fingers: Outcomes of Step-Plasty vs. Purse-String Suture

After failed conservative therapy or in the absence of any intervention, a rupture of the digital subcutaneous extensor tendon at the distal interphalangeal (DIP) joint, known as mallet finger, may lead to a chronic extension deficit due to excessive scarring and tendon elongation. Various surgical techniques to restore the extension of the distal phalanx have been proposed, but an optimal approach has not yet been established. To tighten the extensor tendon, a purse-string suture can be applied. Although it has shown efficacy, it can result in significant bulging and scar formation. Using the "abbreviato" technique, the elongated part of the extensor tendon is excised, and the tendon is re-sutured. Also, tenodesis has been described, particularly in pediatric cases. In this retrospective follow-up study, we aimed to investigate if the step-plasty procedure previously described by Baumeister provides comparable, if not superior, functional and aesthetic outcomes compared to existing techniques for patients with chronic mallet finger. In this retrospective study, a consecutive series of 68 patients with chronic mallet fingers was enrolled. Patients were treated surgically using step-plasty of the respective extensor tendon. After skin incision and tenolysis, the elongated extensor tendon was incised in a Z-like fashion and stepwise resected in the transverse portion of the Z. The functional and aesthetic effects of this step-plasty technique were compared with results of 44 patients previously treated using purse-string sutures of the extensor tendon and evaluated using Crawford's and Levante's criteria. In all patients undergoing the step-plasty procedure, the extension deficit was significantly reduced from an average of 42 degrees preoperatively to 11 degrees postoperatively. In contrast, the control group treated by purse-string sutures showed a slightly higher postoperative extension deficit of 15 degrees. According to Levante's criteria, the results of our step-plasty procedure were significantly better than those achieved with purse-string sutures. Our study demonstrated that the treatment of older or chronic subcutaneous extensor tendon ruptures using the step-plasty technique led to a significant reduction in extension deficits. According to Levante's criteria, the postoperative outcome was significantly better in comparison to the purse-string suture technique. Additionally, no skin resection was required to improve the extension capability of the distal finger joint, compared to established surgical procedures.

MRI findings of closed hand injuries in adolescent goalkeepers: a case-based review

Soccer-related injuries in youth goalkeepers are underrepresented in epidemiological studies, despite goalkeepers experiencing distinct types of upper limb injuries and training loads compared to outfield players. Digit injuries are particularly prevalent, with up to five times more upper extremity injuries reported in this position. Such injuries can lead to interphalangeal joint instability and an increased risk of reinjury. Mechanisms of injury include falls, axial loading of digits, and rotational force due to grasping activities. The proximal interphalangeal joint is the most frequently injured in sports, followed by the metacarpophalangeal joint of the thumb. Achieving precise diagnosis can be challenging due to the complex soft-tissue anatomy of the hand. Radiologists play a crucial role in accurate diagnosis through imaging studies, enabling timely treatment. This article focuses on closed traumatic finger and thumb injuries in adolescent goalkeepers, describing injury mechanisms and outlining relevant MRI features to facilitate proper clinical approaches for diagnosis based on imaging findings.

Incidence and management of mallet finger in Dutch primary care: a cohort study

BACKGROUND

A mallet finger (MF) is diagnosed clinically and can be managed in primary care. The actual incidence of MF and how it is managed in primary care is unknown.

AIM

To determine the incidence of MF in primary care and to obtain estimates for the proportions of osseous and tendon MF. An additional aim was to gain insight into the management of patients diagnosed with MF in primary care.

DESIGN & SETTING

A cohort study using a healthcare registration database from general practice in the Netherlands.

METHOD

Patients aged ≥18 years with a new diagnosis of MF from 1 January 2015-31 December 2019 were selected using a search algorithm based on International Classification of Primary Care (ICPC) coding.

RESULTS

In total, 161 cases of MF were identified. The mean incidence was 0.58 per 1000 person-years. A radiograph was taken in 58% (n = 93) of cases; 23% (n = 37) of cases had an osseous MF. The most applied strategies were referral to secondary care (45%) or conservative treatment in GP practice (43%). Overall, 7% were referred to a paramedical professional.

CONCLUSION

On average, a Dutch GP assesses ≥1 patient with MF per year. Since only a minimal number of patients required surgical treatment and a limited number of GPs requested radiography, the recommendation in the guidelines to perform radiography in all patients with MF should potentially be reconsidered. The purpose of requesting radiographs should not be to distinguish between a tendinogenic or osseous MF, but to assess whether there is a possible indication for surgery.

The biomechanical properties of the hook plate and pull-out suture in mallet finger fractures: a cadaveric study

A total of 32 cadaveric fingers with bony mallet injuries were fixed using either the hook plate or the pull-out suture technique. The purpose of this study was to assess the immediate postoperative biomechanical responses of the fixation techniques under different load conditions. The fingers were cyclically loaded with a force of 7 N for 3500 cycles and until construct failure. The maximum displacements of the hook plate and pull-out sutures were 0.7 mm and 0.6 mm, respectively (p = 0.556). The stiffnesses of the hook plate and pull-out suture were 1.3 N/mm and 1.1 N/mm, respectively (p = 0.515). The ultimate loads-to-failure for the hook plate and pull-out suture were 64.4 N (interquartile range [IQR] 37.7-77.7) and 44.5 N (IQR 29.7-63.5), respectively (p = 0.094). Both fixation techniques were able to withstand immediate postoperative mobilization without any difference in fracture displacement, construct stiffness or maximum load to failure.

Customizable Hyperextension Splint for Mallet Finger

Introduction

Mallet finger is a common deformity occurring due to the traumatic detachment of the extensor tendon at its insertion in the distal phalanx. Despite several different methods of splinting being available, residual extensor lag remains one of the most common complications of conservative treatment.

Technique Report

We demonstrate a novel technique to make a hyperextension splint which can be customized as per the individual. The pictorial demonstration depicts every step in the preparation, application, and maintenance of the splint.

Conclusion

We believe that the use of such easily accessible materials and visual demonstration of each step, with pointers along the way to verify the correct technique, will empower any medical professional, to satisfactorily treat such injuries at the primary point of contact, without necessitating the services of a hand surgeon.

The Treatment of Closed Finger and Metacarpal Fractures

BACKGROUND

Fractures of the fingers and metacarpal bones are the most common fracture type in the upper limb, with an incidence of 114 to 1483 per 100 000 persons per year. The clinical importance of closed finger and metacarpal fractures is often underestimated; inadequate diagnostic and therapeutic measures may result in serious harm. This review concerns the basic elements of the diagnosis and treatment of finger and metacarpal fractures.

METHODS

This review of the incidence, diagnosis and treatment of finger and metacarpal fractures is based on pertinent publications retrieved by a selective search of the literature.

RESULTS

The main focus of treatment lies on restoration of hand function in consideration of the requirements of the individual patient. The currently available evidence provides little guidance to optimal treatment (level II evidence). Although most closed fractures can be managed conservatively, individualized surgical treatment is advisable in comminuted fractures and fractures with a relevant degree of torsional malposition, axis deviation, or shortening, as well as in intra-articular fractures. Minimally invasive techniques are, in principle, to be performed wherever possible, yet open surgery is sometimes needed because of fracture morphology. Postsurgical complication rates are in the range of 32-36%, with joint fusion accounting for 67-76% of the complications. 15% involve delayed fracture healing and pseudarthrosis.

CONCLUSION

Individualized treatment for finger and metacarpal fractures can improve patients' outcomes, with major socioeconomic and societal benefits. Further high-quality studies evaluating the relative merits of the available treatments are needed as a guide to optimized therapy.

Mallet Finger Autofusion in Adolescent Post-Pin Fixation Surgery - A Case Report

Introduction

Mallet finger is a common hand injury in sports in which the terminal extensor tendon is disrupted. This case report describes the rare occurrence of joint autofusion following surgical fixation of an unstable mallet finger injury.

Case Report

We present a case of a 13-year-old right-hand dominant boy who sustained a right long finger bony mallet injury while playing football. Treatment consisted of closed reduction, percutaneous pinning of the right long finger distal interphalangeal (DIP) joint. He went on to heal with residual DIP joint stiffness and only 20° of residual motion that were noted on the early follow-up. Seven years later, he presented with no motion at the right long finger DIP joint. X-rays of his right long finger showed a complete fusion of bone across the DIP joint.

Conclusion

Autofusion as a complication of mallet finger surgery is an unprecedently rare finding, especially in the absence of any predisposing factors. This complication must be considered when treating mallet finger injuries through surgical intervention. Fortunately, the loss of DIP motion, complete in this case, had no long-term effect on the overall use of this patient's hand.

Comparative outcomes between surgical treatment and orthosis splint for mallet finger: a systematic review and meta-analysis

Mallet finger is a commonly encountered condition in daily practice. However, there is currently no consensus on whether surgical intervention or conservative treatment with orthosis splint is superior. In this systematic review and meta-analysis, we compare the treatment outcomes between surgery and orthosis for bony and tendinous mallet finger. We searched PubMed, Embase, and the Cochrane Library according to the PRISMA guidelines from inception to January 15, 2021. The primary outcome was distal interphalangeal (DIP) joint extension lag angle, and secondary outcomes were DIP joint flexion and range of motion (ROM) angle. A total of 297 studies were initially identified, of which 13 (ten retrospective non-randomized controlled studies (non-RCTs) and three RCTs) were included in the final analysis. The results of this systematic review and meta-analysis showed that there was no high level of evidence supporting the superiority of surgery over orthosis in the treatment of mallet finger. Based on the available evidence, surgical intervention and conservative treatment with splint may offer similar clinical outcomes in both bony and tendinous mallet finger.

Clinical Application of Restrictive Brace Combined with Psychological Intervention after Replantation of Severed Fingers in Children

Objective

After replantation of severed fingers in infants, the utility model patent upper limb restrictive brace-assisted bed rest braking, combined with psychological intervention, can alleviate children's anxiety, so as to reduce the occurrence of vascular crisis.

Methods

The study period was from April 2015 to July 2018. In this paper, 30 children with finger injuries in hand surgery in the CIS electronic medical record system of Cangzhou Integrated Traditional Chinese and Western Medicine Hospital were selected as the research objects. Replantation was performed in 30 infants with severed fingers. Among them, 15 cases were applied with the method of aircraft chest arm gypsum splint combined with sedative drug braking and the utility model patented product upper limb restrictive brace fixation-assisted bed rest braking, and the method of psychological intervention was applied at the same time.

Results

Among the 15 fingers in the control group, 6 had vascular crisis and 1 in the experimental group. The incidence of vascular crisis in the experimental group was lower, and the difference between the two groups was statistically significant (P < 0.05). The patients were followed up for 9~18 months, with an average of 9.72 ± 1.07 months. In the control group, 15 cases of severed fingers survived, and there were 13 cases of replantation finger necrosis in 2 cases of intractable arterial crisis. In the experimental group, 14 cases of severed fingers survived in 15 cases and there was 1 case of replanted finger necrosis in intractable arterial crisis after operation. There was no significant difference in the survival rate between the two groups (P > 0.05). In addition, the replanted finger function was evaluated. In the control group, 9 cases were excellent, 4 cases were good, and 1 case was fair. In the experimental group, 14 cases were excellent, 1 case was good, and 0 case was fair. The functional evaluation of the experimental group was better than that of the control group, and the difference between the two groups was statistically significant (P < 0.05).

Conclusion

For infants after replantation of severed fingers, the application of the utility model patented product upper limb restrictive brace can effectively make up for the insufficient fixation of aircraft chest arm gypsum splint, reduce the occurrence of vascular crisis, and assist children in bed. In addition, the application of psychological intervention can reduce children's postoperative crying and is conducive to children's postoperative recovery.

Posttreatment Imaging of the Wrist and Hand: Update 2022

Common indications for surgical procedures of the wrist and hand include acute fractures or fracture-dislocations; nonunited fractures; posttraumatic, degenerative, and inflammatory arthritides and tendinopathies; injuries to tendons, ligaments, and the triangular fibrocartilage complex; and entrapment neuropathies. Soft tissue or osseous infections or masses may also need surgical treatment. Several of these procedures require surgical hardware placement, and most entail clinical follow-up with periodic imaging. Radiography should be the first imaging modality in the evaluation of the postoperative wrist and hand. Computed tomography, magnetic resonance imaging, diagnostic ultrasonography, and occasionally nuclear medicine studies may be performed to diagnose or better characterize suspected postoperative complications. To provide adequate evaluation of postoperative imaging of the wrist and hand, the interpreting radiologist must be familiar with the basic principles of these surgical procedures and both the imaging appearance of normal postoperative findings as well as the potential complications.

Terminal extensor tendon reconstruction as a reliable options for chronic mallet finger with swan neck deformity of index finger: A case report

Introduction

and importance: Chronic mallet finger resulted in mallet deformity or swan neck deformity are caused by imbalance of flexor and extensor mechanism. We tried to offer a reliable option of treatment by terminal tendon reconstruction using needle passer to exchange the use of K-wire which resulted in great result within 3 months of follow up.

Case presentation

36 years old male with previous history of several trauma on his right arm and hand about three months ago; consists of distal phalangeal fracture of right index finger, right fifth metacarpal fracture, proximal phalanx fracture of right small finger, and right shaft radius fracture. After 3 months since initial injury, we focused on the right index finger which suffered in a swan neck deformity. The patient was unable to reach maximum flexion of his right index finger. We performed terminal extensor tendon reconstruction with great result after three months of follow up.

Clinical discussion

Chronic mallet finger has many different techniques of surgical intervention, such as Fowler's tenotomy, tenodermodesis, spiral oblique retinacular ligament (ORL) reconstruction, and arthrodesis of distal interphalangeal (DIP) joint. The surgery was indicated after failure of 4 weeks finger splinting to correct the swan neck deformity. The aim of surgery was to improve finger function, restore normal active-passive flexion of proximal (PIP) and distal interphalangeal (DIP) joint by rebalancing the extensor mechanism of finger, relieve pain, and improve cosmetic appearance.

Conclusion

Terminal extensor tendon reconstruction is a simple, reproducible and reliable option of surgical treatment in chronic mallet finger case. At minimum follow up of 3-months after surgery has showed a satisfactory result.

•

Chronic mallet finger resulted from failure of conservative treatment >4 weeks.

•

Surgery is indicated as the treatment of choice with many different techniques.

•

Terminal extensor tendon reconstruction is a favorable option of surgical treatment.

Stack Splinting Versus Kirschner Wire Treatment in Acute Closed Mallet Finger Doyle I

Introduction

Mallet injuries are common and usually treated conservatively. Various systematic reviews have found a lack of evidence regarding the best management, and it is still unclear.

Objective

To evaluate the treatment efficacy of Stack Splinting compared to a Kirschner wire immobilization of acute closed mallet finger Doyle I.

Methods

From March 2019 to February 2020, 41 patients with acute close mallet finger Doyle I were treated; 19 patients were treated with Kirschner wire and 22 with Stack splinting for a mean of 6 weeks. The average patient age at the time of the injury was 43 years.

Results

Twenty-eight males and 13 females were in this study. Among them, 17 patients were injured in the little finger, 15 in the middle finger, and 9 in the ring finger. Twenty-seven of injuries suffered an aggression, 11 from falling, and 3 from sports injuries. All the fingers had typical mallet malformation. Seventeen patients treated with Kirschner wire completed the treatment with full recovery, only 7 patients treated with Stack splint completed the treatment and 15 treated with Stack splint had relapse on mallet injury.

Conclusion

Kirschner wire treatment is a simple procedure, and proves in this study that has better results in patients with acute closed mallet finger Doyle I compared to Stack splint.

Surgical treatment of the bony mallet thumb: a case series and literature review

INTRODUCTION

The aim of this study was to provide a more precise statement on the outcome after surgical treatment of a bony mallet thumb and possibly give a treatment recommendation regarding the surgical fixation method.

PATIENTS AND METHODS

All patients (n = 16) who underwent a surgical treatment for an acute bony mallet thumb fracture between January 2006 and July 2019 were enrolled. The surgical method, complications, the range of motion, tip pinch, lateral key pinch, overall grip strength, visual analog score, Disability of the Arm, Shoulder and Hand Score, Mayo Wrist Score, Patient-Rated Wrist Evaluation Score, Buck-Gramcko Score and radiologic parameters were evaluated. Further, a comprehensive literature search on PubMed was conducted covering a period from 1956 to 2021 to include all possible matching articles on the treatment of the bony mallet thumb (n = 21 articles).

RESULTS

Surgical treatment was very inhomogenous including indirect and direct K-wire fixation, screw fixation, plate fixation and anchor fixation methods. The IP joint range of motion and thumb strength ranged from 66 to 94% in comparison to the contralateral side. An open reduction led to worse functional scores compared to a closed reduction. Treatment methods in the literature were also very inhomogenous with a very low patient count, often even pooling data of bony mallet thumb fractures with bony mallet finger fractures. The risk for infection was higher in K-wire fixation methods than in open reduction and internal fixation methods.

CONCLUSION

The evidence for the best treatment of a bony mallet thumb fracture is low. On one hand the functional outcome can be inferior using an open reduction approach, but on the other hand, K-wire fixation methods with a closed reduction approach showed a higher risk for infection. Future multi-center research must be conducted to find the best treatment procedure for the best outcome of the patient.

The results of delayed open reduction and internal fixation in chronic bony mallet finger injuries

OBJECTIVES

The aim of this study was to evaluate the functional results of delayed open reduction and Kirschner wire (K-wire) fixation procedures in patients with delayed presentation of bony mallet finger.

PATIENTS AND METHODS

Between February 2009 and November 2019, a total of 19 patients (15 males, 4 females; median age: 24.8 years; range, 14 to 47 years) who were diagnosed with a delayed bony mallet finger and treated with dorsal block pin, direct pinning, or the umbrella handle technique were retrospectively analyzed. The Crawford criteria were used to evaluate the outcomes. The degrees of range of motion (ROM) were measured by a goniometer.

RESULTS

The median time from injury to surgery was 41 (range, 28 to 90) days. The median DIP joint extension limitation was 7.63 (range, 0 to 40) degrees and the median ROM of the DIP joint was 66.3 (range, 20 to 90) degrees. There was no statistically significant difference in the postoperative ROM, compared to the uninjured side (p>0.05). The Crawford score was excellent in 11, good in four, fair in three, and poor in one patient. Bone union was achieved in all patients.

CONCLUSION

Delayed open reduction and K-wire fixation of chronic bony mallet finger injuries yield successful functional outcomes with low complication rates. Extension lag can be eliminated in most patients by making the joint surface anatomical. The most optimal method should be selected depending on the size of the fracture fragment.

An overview of mallet finger injuries

Mallet finger describes a fingertip deformity where the distal interphalangeal joint (DIPJ) of the affected digit is held in flexion, unable to extend the distal phalanx actively. The deformity is typically a consequence of traumatic disruption to the terminal extensor tendon at its insertion at the proximal portion of the distal phalanx or slightly proximally at the level of the DIPJ. Patients typically present with a history describing the event of injury with a typical mallet deformity. Common mechanisms include sport activities causing a direct blow to the finger, low energy trauma while performing simple tasks such as pulling up socks or crush injuries from getting the finger trapped in a door. The DIPJ can be passively extended, but this extension of the joint cannot be maintained once the passive extension is stopped. The Doyle classification can be used to categorise and dictate treatment. The extensor lag associated with the deformity does not improve spontaneously without treatment. Inappropriate management can lead to chronic functional loss and stiffness of the finger. The majority of closed mallet splints are Doyle type I, which can be managed non-surgically with external splints, worn full-time to keep the fingertip straight until the tendon injury or fracture heals. Surgical techniques is considered for other types of mallet injuries. Techniques used include closed reduction and Kirschner wire fixation, open reduction and internal fixation, reconstruction of the terminal extensor tendon and correction of swan neck deformity.

Management for Bony Mallet Thumb with a Single Extension Blocking Kirschner Wire

Introduction

Mallet finger injury is defined by disruption of the terminal extensor tendon distal-to-distal interphalangeal (DIP) joint. While in the fingers, it is a relatively common injury, it is a rarely encountered entity when involving the thumb. Various conservative and operative treatment strategies have been reported for the management of mallet thumb with no consensus by clinicians.

Case Report

We present the case of a 27-year-old right hand dominant man with a left bony mallet thumb injury that occurred while playing hurling. Hurling is traditional Irish sport that is one of the fastest field games in the world, involving the use of a wooden Hurley and ball. Clinically, there was loss of active extension at the DIP joint of the non-dominant thumb with radiographs revealing an avulsion fracture involving more than one-third of the articular surface at the base of the distal phalanx. Closed reduction and percutaneous fixation using a single extension block Kirschner wire was performed without a transfixion wire across the DIP joint. Four months postoperatively, the patient had regained that good functional dexterity was able to return to playing hurling.

Conclusion

A single K-wire technique may be beneficial with theoretical reduction of chance of iatrogenic nail bed, bone fragment rotation, chondral damage, and bone injury. To the best of our knowledge, no previous reports of its application to bony mallet thumb have been described.

Extension pin block technique versus extension orthosis for acute bony mallet finger; a retrospective comparison

PURPOSE

This study aimed to compare the clinical, radiological, aesthetic and economic outcomes of extension pin block technique and extension orthosis in closed mallet fractures with more than 1/3 of articular surface involvement without subluxation (Wehbe and Schneider classification type IB and IC).

MATERIALS AND METHODS

Thirty-nine patients (11 women and 28 men; mean age: 40.9±11.5 years) who had mallet fractures were retrospectively reviewed. Twenty-one patients were treated with the extension pin block technique, and the remaining 18 were treated with the extension orthosis. Fracture classification, measurement of articular surface involvement, presence of subluxation, and the fragment displacement were performed according to the Wehbe and Schneider classification. Crawford's criteria, extension lag, distal interphalangeal joint (DIPJ) range of motion, dorsal bump, and visual analog scale were evaluated. Fracture union, articular incongruity, and all other complications were followed and analyzed. The Michigan Hand Questionnaire (MHQ) was used to evaluate the aesthetic perception of the patient's finger. Direct and indirect costs were calculated for each treatment method.

RESULTS

At the final follow-up (mean: 18.4±6.2 months), there was no significant difference with respect to clinical outcomes between groups (p=0.335) and pain (p=0.131). Fracture union was achieved in all cases. Both extension lag (p=0.150) and DIPJ flexion (p=0.261) were not different between groups. Dorsal bump was more frequent in the conservative treatment group (p=0.048). Aesthetic scores were similar between groups (p=0.477), but female patients rated significantly lower aesthetic scores than males (p=0.003) regardless of the treatment method. The direct medical (p=0.001), indirect (p=0.009) and cumulative costs (p=0.001) were significantly higher in surgical treatment group. One pin tract infection, one nail dystrophy, and one joint space narrowing were seen in the surgical treatment group versus none in the conservative treatment group (p=0.698).

CONCLUSIONS

Conservative treatment does not result in inferior clinical, radiographic and aesthetic outcomes compared to surgical fixation in closed mallet fractures with more than 1/3 of articular surface involvement without subluxation. Extension orthosis which is non-invasive, and cheap, maybe the treatment of choice in closed mallet fractures.

LEVEL OF EVIDENCE

IV; Retrospective cohort.

Reliability of subluxation and articular involvement measurements during the assessment of bony mallet finger

The aim of this study was to investigate the reliability of distal interphalangeal joint (DIPJ) subluxation and articular surface involvement measurements during the assessment of bony mallet finger. Two observers measured articular involvement, subluxation ratio and rated joint congruency on 30 lateral radiographs of patients with bony mallet finger on two separate occasions. All measurements and ratings were done on magnified digital radiographs on a workstation. The intraclass correlation coefficient (ICC) and kappa statistics were used to establish relative agreement between observers. The intra-observer reliability for articular involvement and subluxation ratio were good for Observer A (ICCs 0.888 and 0.775) and excellent for Observer B (ICCs 0.958 and 0.910) on both occasions. However, the subluxation rating was moderate for both observers (kappa 0.772 and 0.780, respectively). Inter-observer reliability for articular involvement (ICC 0.884) and the subluxation ratio (ICC 0.818) was good on the first measurement. Although the subluxation rating was perfect for the first measurement (kappa 0.927), it was moderate for the second (kappa, 0.619). The reliability of articular involvement (%) and subluxation ratio (%) measurement was good and excellent. However, the decision on whether the DIPJ is congruent or incongruent was only moderately reproducible. These findings show us that surgeons should be cautious when assessing subluxation, which is the most important criterion for choosing the appropriate treatment.

Optimising the conservative management of closed tendinous mallet finger injury

Mallet finger injuries are a common presentation in the emergency department. These injuries result from a forced flexion at the distal interphalangeal joint (DIPJ) that causes extensor tendon disruption, and possibly bone avulsion, at the base of the distal phalanx. This article describes the anatomy, mechanisms, classification and assessment of mallet finger injury. It reviews different types of splints used in the conservative management of closed tendinous mallet finger injury and discusses the latest evidence regarding immobilisation methods and treatment duration. Maintaining the DIPJ in extension during treatment is essential, so the article stresses the importance of patient adherence to treatment.

OUTCOME OF NON-SURGICAL TREATMENT OF MALLET FINGER

OBJECTIVE

To establish the association between initial and residual angulation of the distal interphalangeal joint (DIJ) in mallet finger treated conservatively.

METHODS

An observational, prospective, descriptive and analytical research developed with uncomplicated closed mallet finger patients between January and December 2017. A total of two measurements of the DIJ were done, at the initial trauma and 6 weeks after conservative treatment. All measurements were ranked according to the Crawford Classification and Relative Risk was measured.

RESULTS

In total, 43 patients were studied, in which 53.48% of outcomes obtained were excellent. The sample was divided in two groups; one with less than 30º of DIJ initial angulation, which had 28% of residual angulation. The second group with more than 30º presented 72.22% of residual angulation. The Relative Risk to present a residual angulation in patients that had 30º of DIJ initial angulation was 2.99 (CI 95%) with p = 0.0059.

CONCLUSION

It is suggested that patients with an initial DIJ angulation more than 30º are more likely to present residual angulation with conservative treatment. Level of Evidence IV, Case series.

Mallet finger in an anaesthetist following tracheal intubation

We describe an unusual work-related mallet finger injury sustained by an anaesthetist at the time of induction of anaesthesia. Although injuries in healthcare workers are common, they are rarely described in the literature, and this is the first time that such an injury has been described in this setting. The injury was managed non-surgically and after a significant time away from clinical duties, the anaesthetist made a good recovery and returned to clinical work. Potential contributing factors and preventative strategies are discussed in order to help anaesthetists avoid similar injuries occurring in future.

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.

Mallet finger injuries: the signs, symptoms, diagnosis and management

Patients commonly present to UK emergency departments with injuries to the tips of their fingers. Mallet finger is one of the most common injuries, resulting from an injury to the extensor tendon over the dorsal surface of the distal phalanges of the hand. Timely recognition, diagnosis and management are required to prevent complications. This article provides an overview of the pathophysiology, signs, symptoms, diagnosis and management of mallet finger injuries.

Open reduction and compression with double Kirschner wires for the treatment of old bony mallet finger

Background

The management of old bony mallet fingers is complicated. The aim of the study is to present a new method of open reduction and compression with double Kirschner wires (K-wires) in treating old bony mallet fingers.

Methods

This was a retrospective analysis of patients with old closed bony mallet fingers treated between June 2013 and December 2016. Complications were observed. The range of motion (ROM) of the DIP joints was measured using a protractor. At the last follow-up, anteroposterior and lateral X-ray of the affected finger was performed, the flatness of the articular surface was scored, and the results were graded using Crawford’s criteria.

Results

Seventeen patients were followed up for 8 (6–19) months. The width of the avulsion fracture block accounted for 25–62% of the articular surface of the distal phalanx. Twelve (70.6%) patients had anterior dislocation of the interphalangeal joint. All patients reported healing at the fracture sites. Healing time was 7.6 ± 2.1(5–13) weeks. All patients had incision healing of I/Class A. Lateral X-ray showed 13 and four patients had excellent and good articular surface flatness, respectively. At the last follow-up, no traumatic arthritis was present. Only one patient developed mild pain after surgery (VAS score of 3). Postoperative ROM was 76.5 ± 10.6° (P = 0.0625 vs. healthy side). At the last follow-up, the angle of loss of dorsiflexion was 0–10° (P < 0.0001 vs. baseline). The flexion angle was 50–90° (P = 0.0625 vs. healthy side).

Conclusions

Open reduction and compression with double K-wires is feasible in treating old bony mallet finger.

Outcomes of Splinting in Pediatric Mallet Finger

PURPOSE

Excessive flexion at the distal interphalangeal (DIP) joint disrupts the extensor mechanism, leading to mallet finger injuries. The goal of management is to restore active DIP joint extension. We sought to learn which variables (treatment technique, injury type, time to presentation, adherence to treatment) affect clinical outcomes of pediatric mallet finger injuries.

METHODS

A retrospective review was performed of patients who presented with mallet finger injuries during 2013 to 2017 at a large pediatric hospital. Patient characteristics, treatments, outcomes, and radiographic data were collected. Types of nonsurgical treatment, acute versus delayed (> 28 days) presentation, and compliant versus noncompliant patients were compared. Differences in extension lag and incidence of complications were evaluated.

RESULTS

There were 94 patients with 99 mallet fingers, with a mean age of 13.7 years, 66 of whom were boys (70%) and 28 girls (30%). Most injuries occurred during recreation (78%). Ninety-nine percent of patients were treated nonsurgically with extension orthoses. The majority of injuries were bony mallets (80%). The outcomes resulted in a mean extension lag of 1°. Of patients presenting acutely, residual extension lag and complications occurred in 12% and 9%, respectively; the lag and complication rate for patients presenting after a delay was 25% and 19%, respectively. Treatment adherence was associated with better clinical outcomes, with nonadherent patients more likely to experience a residual extensor lag (11% vs 67%) and potentially clinically relevant complications (8% vs 50%).

CONCLUSIONS

The majority of pediatric mallet finger injuries can achieve good outcomes with nonsurgical treatment. Absolute indications for surgery in this population remain unclear.

TYPE OF STUDY/LEVEL OF EVIDENCE

Therapeutic IV.