Periprosthetic osteolysis after total wrist arthroplasty

Periprosthetic radiolucency in total wrist arthroplasty: a radiographic study

This retrospective study investigates the incidences of periprosthetic radiolucency and the position of the prosthesis in patients who underwent total wrist arthroplasty. A total of 50 patients with a mean age of 58 years (SD 11) were included. The available dorsopalmar and lateral radiographs were categorized into the following groups: immediately postoperative and 1, 2, 3, 5 and beyond 6 years postoperatively. The findings of this study indicate that periprosthetic radiolucency is a progressive phenomenon that originates at the bone adjacent to the joint line, possibly due to stress shielding. The size of the periprosthetic radiolucency showed no correlation with any clinical parameter, nor can its size be predicted by intraoperative implant positioning. However, a significant correlation was observed between a reduced implant-middle finger carpometacarpal distance and higher postoperative pain levels as well as patient dissatisfaction. Revision surgery after total wrist arthroplasty should not be solely guided by radiological signs of periprosthetic radiolucency. Instead, this study suggests that consideration for revision surgery should be reserved for symptomatic patients experiencing persistent pain and swelling accompanied by radiographic evidence of carpal implant subsidence.Level of evidence: IV.

Long-Term Outcomes of Wrist Arthroplasty Using the ReMotion™ Implant in Non-inflammatory Wrist Pathology

Background: Wrist arthroplasty is increasingly offered to patients with symptomatic wrist arthritis as an alternative to wrist arthrodesis. The purpose of this study was to present our outcomes with the ReMotion™ wrist arthroplasty in a consecutive series of patients with wrist arthritis from non-inflammatory conditions. Methods: Thirteen (eight women, nine dominant wrists) patients, 68 (44-85) years of age with advanced radiocarpal arthritis due to SLAC/SNAC (11) and Kienbock disease (2) had a ReMotion™ (Stryker, Michigan, USA) wrist arthroplasty implanted, and were prospectively followed for 7 (4-9) years. The outcome measures included patient-rated wrist and hand evaluation (PRWHE) score, disabilities of the arm, shoulder and hand questionnaire (QuickDASH) score, visual analogue pain score (0-10) on the radial and ulnar aspect of the wrist at rest (VASrR/VASuR) and activity (VASrA/VASuA), active wrist range of motion (AROM) including flexion, extension, ulnar and radial deviation, pronation and supination and grip and key-pinch strength measured preoperatively and at yearly follow-ups by independent hand therapists. Results: Six patients had ten re-operations during the follow-up including four revisions to a new arthroplasty. Four were considered loose at follow-up. A significant reduction in PRWHE (63 to 12), radial pain at activity (6 to 1) and increased pronation (85° v 90°) was observed. Conclusions: We found a high complication and reoperation rate, two out of 13 had no complications or reoperations. The ReMotion™ arthroplasty should be used with caution in non-inflammatory wrist patients and the patients followed closely. A high reoperation and revision rate can be expected, and surgeons familiar with revision arthroplasty procedures should perform the surgery. Level of Evidence: Level II (Therapeutic).

Complications after total wrist arthroplasty

We reviewed the incidence and management of complications after total wrist arthroplasty, as reported in the literature, with so-called fourth-generation implants and other recent designs. While early intraoperative and postoperative complications, including fractures, tendon lacerations, infection, nerve compression, tendonitis, stiffness and chronic regional pain syndrome, had an acceptable incidence, late complications, such as periprosthetic osteolysis and implant loosening, occurred more frequently. Implant survival at 10 years was in the range of 70%-80% in most publications. Several of the implants have been modified or withdrawn. Instability and dislocation were frequent after a pyrocarbon spacer. Failed arthroplasties can be salvaged by revision arthroplasty or total wrist arthrodesis. Revision arthroplasty has a lower survival rate than primary arthroplasty and does not clearly offer important significant advantages over total wrist arthrodesis in terms of patient-reported outcome measures. Further development of prosthetic design, new materials and more knowledge on patient-related risk factors are needed.

Clinical and Patient-Reported Outcomes After Total Wrist Arthroplasty and Total Wrist Fusion: A Prospective Cohort Study with 2-Year Follow-up

Background

The functional benefits of total wrist arthroplasty (TWA) over total wrist fusion (TWF) are unknown. The purpose of this prospective cohort study was to compare TWA and TWF with respect to functional outcomes and activity limitations at up to 2 years postoperatively.

Methods

Between 2015 and 2020, we enrolled all adult patients undergoing TWA or TWF for the management of symptomatic end-stage wrist arthritis at 1 hand surgery department. The primary outcome was the Patient-Rated Wrist Evaluation (PRWE). The secondary outcomes were the visual analog scale (VAS) for pain at rest, on motion, and on loading; grip strength; Disabilities of the Arm, Shoulder and Hand (DASH); and range of motion. Patients completed questionnaires and were examined by the same physiotherapist at baseline and at 3, 6, 12, and 24 months postoperatively. Mixed-model analyses adjusting for age, diagnosis, the preoperative value of the dependent variable, and time since surgery were performed to compare differences in PRWE scores, VAS pain scores, and grip strength between TWA and TWF.

Results

Of the 51 patients who had been included at baseline, 47 (18 in the TWA group and 29 in the TWF group) responded to questionnaires and underwent examinations at up to 2 years postoperatively. At baseline, the 2 groups did not differ in terms of age, sex, diagnosis (inflammatory or noninflammatory arthritis), PRWE score, VAS pain score, grip strength, DASH score, or range of motion. No differences between the groups were found for the PRWE (β, -0.1; 95% confidence interval [CI], -14 to 13; p = 0.99), VAS pain at rest (β, -3.3; 95% CI, -15 to 9; p = 0.58), VAS pain on loading (β, -5.3; 95% CI, -22 to 11; p = 0.52), or grip strength (β, -0.02; 95% CI, -0.18 to 0.14; p = 0.80) on the adjusted mixed-model analyses.

Conclusions

Among patients with symptomatic end-stage wrist arthritis, those who underwent TWA did not demonstrate short-term outcomes, including patient-reported disability, pain, and grip strength, superior to those of patients who underwent TWF. These findings call into question the widespread use of TWA.

Level of Evidence

Therapeutic Level II. See Instructions for Authors for a complete description of levels of evidence.

Periarticular distal radius fractures and complex ligamentous injury: The role of arthroscopic evaluation

Purpose

Distal radius fractures are associated with a high incidence of concomitant soft tissue injuries, including lesions of the triangular fibrocartilage complex and intercarpal ligaments. While advanced imaging has allowed for greater identification of such tears, discerning which lesions pose a functional consequence remains a challenge for the hand surgeon. A review and guideline for arthroscopic evaluation of suspected combined injuries is presented.

Results

Arthroscopic evaluation of distal radius fractures provides several unique advantages in such instances. Articular reduction can be performed via direct visualization with improvement in step-off and gapping. Furthermore, ligamentous injuries and carpal alignment can be directly assessed and treated.

Conclusions

Subtle features of combined ligamentous trauma may be overlooked in the presence of more obvious fracture patterns. Wrist arthroscopy allows not only for a gold-standard method of evaluating of these soft tissue injuries, but also a means of treatment.

Long-term outcomes of the Universal 2 total wrist replacement: revision and loosening at 10 years and beyond

The aim of this study was to ascertain the long-term revision rates of the Universal 2 wrist prosthesis in a previously published cohort of patients with rheumatoid arthritis. The time to, and reasons for revision were determined. Radiographs were analysed to determine whether loosening had occurred in the long-term according to the Wrightington zonal classification of loosening. Seventy-eight wrists from the original cohort of 85 wrists could be identified for analysis. The longest follow-up was 16 years and 29 wrists had follow-up beyond 10 years. Seventeen wrists had been revised or were on the waiting list for revision, an overall revision rate of 22%. The 10-year survivorship was 78%. Long-term revision was commonly for periprosthetic loosening with pain and component subsidence. In those with more than 10-year follow-up, significant lucency was seen in 16 carpal components and 15 radial components. Explant analysis showed significant polyethylene wear and we postulate this is the principal reason for component loosening.Level of evidence: IV.

Total wrist fusion versus total wrist prosthesis: a comparative study

We present a comparative study of 41 total wrist fusions (TWFs) with contoured plate and 22 total wrist prostheses using the Universal 2™ model, with a mean follow-up of 6 years for the fusion and 6.5 years for the prosthesis. We evaluated grip strength, pain according to the visual analogue scale, functional results using the Quick Disabilities of the Arm, Shoulder and Hand and the Patient-Rated Wrist Evaluation, degree of satisfaction and complications, with no significant differences being observed in any of these variables. The results allow us to conclude that total wrist prosthesis implanted in patients with low or moderate functional demands offers medium-term functional results similar to TWF without increasing the number of complications.Level of evidence: III.

15-20 Year Follow-up After Wrist Arthroplasty Surgery - Revisiting the Development and Introduction of a New Prototype Concept for Total Wrist Arthroplasty

Background: Wrist arthroplasties have not achieved clinical outcomes comparable to those of shoulders and knees, being offered low-demand patients due to a high failure rate. In the 90s, there were no wrist arthroplasties available for high-demand patients. An experimental setup for the development of a new wrist arthroplasty intended for all wrist patients were done. A long-term final follow-up to evaluate the performance of the experimental arthroplasty was performed. Methods: A novel uncemented modular wrist prosthesis with conical threaded fixation, metal-on-metal coupling and ball-and-socket articulation was developed. In an experimental study, eight patients (7 men, 53 years of age) were operated between 2001 and 2003, to treat non-inflammatory primary or secondary osteoarthritis. Published mid-term results (7-9 years) demonstrated satisfactory function, but two arthroplasties were converted to arthrodesis due to infection. Results: At final follow-up 15-20 years after primary surgery, the remaining six patients still had a wrist arthroplasty (in three the original) in situ. The clinical results were good. Low pain (median = 0), Quick Disability of Arm, Shoulder and Hand (QDASH median 11) and Patient Rated Wrist and Hand Evaluation (PRWHE median = 14) scores were reported. Wrist active range of motion (AROM) was 64% and grip strength 86% compared to the opposite side. None regretted choosing arthroplasty knowing the outcome. Conclusions: Despite technical errors and the implementation of an incomplete prototype, this new concept for arthroplasty has demonstrated promising long-term fixation, a stable articulation with good range of motion, satisfactory function and pain reduction in high-demand patients. Level of Evidence: Level IV (Therapeutic).

A "Congenitally Adapted" TFCC Tear in Radial Longitudinal Deficiency: Case Report and Review of Literature

We present a case of chronic wrist pain in a 14-year-old child with mild radial longitudinal deficiency and radiographic carpal collapse due to the absence of the scaphoid. Wrist arthroscopy demonstrated synovitis and a tear to the TFCC, which would be called "degenerative," according to the Palmer classification. This was debrided, and the patient is still asymptomatic at long-term follow-up. Review of the literature found one paper with a similar observation in a 17-year-old adolescent. We propose that paediatric "degenerative" tears ought to be called "congenitally adapted" tears.

A randomized controlled trial comparing two modern total wrist arthroplasties : improved function with stable implants, but high complication rates in non-rheumatoid wrists at two years

AIMS

To analyze the short-term outcome of two types of total wrist arthroplasty (TWA) in terms of wrist function, migration, and periprosthetic bone behaviour.

METHODS

A total of 40 patients suffering from non-rheumatoid wrist arthritis were enrolled in a randomized controlled trial comparing the ReMotion and Motec TWAs. Patient-rated and functional outcomes, radiological changes, blood metal ion levels, migration measured by model-based radiostereometric analysis (RSA), bone mineral density (BMD) measured by dual-energy X-ray absorptiometry (DXA), complications, loosening, and revision rates at two years were compared.

RESULTS

Patient-Rated Wrist and Hand Evaluation (PRWHE) scores, abbreviated version of the Disabilities of the Arm, Shoulder and Hand questionnaire scores, and pain improved similarly and significantly in both groups. Wrist motion improved significantly in the Motec group only, and forearm rotation in the ReMotion group only. Cobalt (Co) and chromium (Cr) blood ion levels were significantly higher in the metal-on-metal (MoM) Motec group than in the metal-on-polyethylene (MoP) ReMotion group. Mean total translation was 0.65 mm (95% confidence interval (CI) 0.26 to 1.12) and 0.27 mm (95% CI 0.14 to 0.47) for the ReMotion carpal and radial components, and 0.32 mm (95% CI 0.22 to 0.45) and 0.26 mm (95% CI 0.20 to 0.34) for the Motec metacarpal and radial components, respectively. Apart from dorsal and volar tilts, which were significantly higher for the radial ReMotion than for the Motec component, no significant differences in absolute migration occurred. BMD around the radial components never returned to baseline. Almost one-third of patients required reoperation due to complications. Two ReMotion implants were revised to Motec TWAs due to carpal component loosening, and three Motec MoM articulations were revised to metal-on-polyether ether ketone due to painful synovitis.

CONCLUSION

Both implants provided matched function and were stable at short-term follow-up, but with a high complication rate. This procedure should be restricted to specialist centres undertaking prospective analysis until its role is clarified.Cite this article: Bone Joint J 2022;104-B(10):1132-1141.

Postoperative assessment and management of metallosis and periprosthetic osteolysis in patients treated with metal-on-polyethylene total wrist prostheses

We analysed the relationship between serum metal ions, radiological periprosthetic osteolysis and the clinical features in a series of 25 patients treated with fourth-generation metal-on-polyethylene total wrist prostheses. The mean implant follow-up was 7 years. Our results show that titanium was the main elevated serum metal ion in patients with the prostheses that we used; elevated serum cobalt or chromium values were infrequent. The risk of loosening was higher in an implant older than 6 years, with more than five periprosthetic osteolysis points according to our radiograph zone system, and serum titanium values between 26 to 31 µg/L. The presence of metallosis pseudotumours does not guarantee but increases the risk of implant failure, which may be asymptomatic or associated with little pain.Level of evidence: IV.

Pseudotumor after Total Wrist Arthroplasty Mimicking a Neoplasm

Background  Total wrist arthroplasty can lead to a variation of complications. One of these is the formation of a pseudotumor. Although this complication is well known after total hip arthroplasty, it is rare in patients with wrist implants. Case Description  A 55-year-old man with a Universal 2 (Integra, Plainsboro, NJ) wrist prosthesis was seen with a progressive mass on the radial side of his wrist since 1 year, initially suspicious for a neoplasm. However, after exploration, histopathology confirmed a particle-induced foreign body reaction. Literature Review  There is little literature on pseudotumor formation after total wrist arthroplasty. Currently, there is no clear consensus about the etiology of pseudotumors but possible causes may include foreign body reaction, hypersensitivity, and wear debris. Clinical Relevance  This case report shows that particle debris-induced pseudotumors should be considered when a patient with a wrist prosthesis presents with a mass suspicious for a neoplasm. In addition, treatment options of pseudotumors after wrist arthroplasty in literature is discussed.

Total Wrist Arthroplasty for Posttraumatic Wrist Osteoarthritis: A Cohort Study Comparing Three Indications

Scapholunate ligament ruptures and scaphoid nonunion with consecutive advanced collapse (SLAC and SNAC wrists) as well as intra-articular distal radius fractures (DRF) are prone to cause posttraumatic wrist osteoarthritis. The aim of this study was to compare the outcomes of these indications for total wrist arthroplasty. We included 13, 11, and 8 patients with an overall mean age of 60 ± 9 years in the SLAC, SNAC, and DRF cohort, respectively. After an average follow-up period of 6 ± 3 years, we found no difference between our groups regarding pain levels and functional scores, although these parameters significantly improved compared to preoperative parameters. Complication and revision rates revealed no significant difference. However, significantly higher extension, arc of range of motion values in the flexion-extension, as well as in radial-ulnar deviation plain were detected in the SLAC compared to the DRF group. Finally, TWA proved to show a beneficial performance in all three investigated indications.

Wrist Hemiarthroplasty for Complex Intraarticular Distal Radius Fracture in a Patient with Manifest Osteoporosis

Distal radius fracture (DRF) is one of the most common fractures of the elderly. The higher the degree of joint surface destruction, and the more adverse factors are involved, the more challenging proper treatment becomes. In this regard, osteoporosis as underlying systemic disease, chondropathy or degeneration of adjacent wrist bones as well as incompliance significantly impair the success of the chosen primary therapy. Wrist hemiarthroplasty has already been reported as primary or secondary procedure for DRFs. In this case report, we present a patient with a severely comminuted DRF including posttraumatic degeneration of the lunate as well as manifest osteoporosis. Wrist hemiarthroplasty using the ReMotion radius component in combination with proximal row carpectomy was performed as secondary surgery. This procedure proved to be a viable treatment option in terms of achieving low pain levels, high range of motion values and stable osteointegration over a course of 6.5 follow-up years.

Proximal Row Carpectomy with Total Scapoidectomy vs. Conventional Carpal Resection for ReMotion Total Wrist Arthroplasty

High complication rates in total wrist arthroplasty (TWA) still lead to controversy in the medical literature, and novel methods for complication reduction are warranted. In the present retrospective cohort study, we compare the outcomes of the proximal row carpectomy (PRC) method including total scaphoidectomy (n = 22) to the manufacturer’s conventional carpal resection (CCR) technique, which retains the distal pole of the scaphoid (n = 25), for ReMotion prosthesis implantation in non-rheumatoid patients. Mean follow-up was 65.8 ± 19.8 and 80.0 ± 28.7 months, respectively. Pre- and postoperative clinical assessment included wrist flexion-extension and radial-ulnar deviation; Disability of Arm, Shoulder, and Hand scores; and pain via visual analogue scale. At final follow-up, grip strength and satisfaction were evaluated. All complications, re-operations, and revision surgeries were noted. Clinical complications were significantly lower in the PRC group (p = 0.010). Radial impaction was detected as the most frequent complication in the CCR group (n = 10), while no PRC patients suffered from this complication (p = 0.0008). Clinical assessment, grip strength measurements, and the log rank test evaluating the re-operation as well as revision function showed no significant difference. All functional parameters significantly improved compared to preoperative values in both cohorts. In conclusion, we strongly recommend PRC for ReMotion prosthesis implantation.

Long-Term Results of the Modular Physiological Wrist Prosthesis (MPW®) in Patients with Inflammatory Diseases

The wrist is among the predilection sites of over 90% of cases of rheumatoid arthritis (RA). In advanced cases, total wrist arthroplasty (TWA) is an alternative to arthrodesis. The aim of this study is to present the long-term results of the modular physiological wrist prosthesis (MPW^®) and to match them in context with the results of a standard population survey. In a retrospective study with follow-up, patients with an MPW^® endoprosthesis were evaluated concerning the clinical and radiological outcome, complications were reviewed (incidence and type), and conversion to wrist fusion was assessed. Patient function measurements included the Mayo wrist score, the patient-specific wrist test, and therefore the DASH score (arm, shoulder, and hand). Thirty-four MPW^® wrist prostheses were implanted in 32 patients, including thirty primary implantations and four changes of the type of the endoprosthesis. Sixteen patients (18 prostheses) underwent clinical and radiological follow-up. The average follow-up time was 8.5 years (1 to 16). Poor results of the MPW prosthesis are caused by the issues of balancing with luxation and increased PE wear. Salvage procedures included revision of the TWA or fusion. In successful cases, the flexion and extension movement averaged 40 degrees. The grip force was around 2.5 kg. The common DASH score was 79 points, with limited and problematic joints of the upper extremity. The MPW wrist prosthesis offered good pain relief and functional movement in over 80% of cases. The issues of dislocation and increased PE wear prevent better long-term results, as do the joints affected. A follow-up study with fittings under a contemporary anti-rheumatic therapy with biologicals suggests increasing score results. Type of study/level of evidence: Case series, IV.

Universal 2™ total wrist arthroplasty: A single-surgeon 6.5-year follow-up study of 22 prostheses

Total wrist arthroplasty remains controversial, with the few studies undertaken being heterogeneous and having low patient numbers. This prospective study involved 22 Universal 2™ total wrist prostheses implanted by the same surgeon between 2003 and 2017. There were 13 women and nine men with an average age of 56 (42-69.5) years. Indications for total wrist arthroplasty were post-traumatic arthritis, rheumatoid arthritis and Kienböck's disease. The mean follow-up was 6.5 (3-17) years. Two failed implants required total wrist fusion. Postoperative pain, grip strength, QuickDASH, patient-rated wrist evaluation, and Mayo wrist scores improved significantly compared with preoperative scores. The prosthesis preserved equal or slightly greater range of motion than the preoperative range of motion, sufficient to undertake activities of daily living and improve quality of life. Postoperative radiographs 1 month after the surgery and then annually showed signs of bone deterioration in 64% of implants, most osteolysis without loosening, compatible with asymptomatic function. Although a high number of radiographic signs of implant changes were apparent in the midterm, 91% of prostheses are still in place. The long-term survival of this implant is uncertain. LEVEL OF EVIDENCE: Therapeutic IV.

Clinical, functional, and radiological results of the Amandys® interposition arthroplasty in 13 cases of wrist osteoarthritis

Amandys® pyrocarbon interposition arthroplasty is intended for widespread arthritis of the wrist. The aim of this study was to assess the clinical, functional, and radiological results of this arthroplasty with a minimum follow-up of 12 months. This retrospective single-center study brought together all osteoarthritis indications that can benefit from an Amandys® arthroplasty. Twenty-one implants were used between January 2011 and October 2018. There were seven cases of distal radius malunion, eight SLAC wrists, two SNAC wrists, two cases of Kienböck's disease at Lichtman's stage 4, and two aftermaths of inflammatory arthritis. Twenty-four percent of patients had previously undergone another type of surgery for this wrist arthritis. Six implants were removed, five early for dislocation and one after 6 years for chronic pain. Thirteen patients were reviewed with an average follow-up of 40.7 months (21-90). The average pain level on a visual analog scale was 3.1/10 (0-7). The mean range motion was 36° flexion (10-60) and 33° extension (15-50). The mean grip strength at the last follow-up was 14.8 kg (2-30) (43% of contralateral). The average QuickDASH and PRWE functional scores were 37.9/100 (0-80) and 29.6/100 (0-83.5), respectively. Amandys® interposition arthroplasty is an interesting alternative to total wrist fusion or total wrist prosthesis for widespread arthritis of the wrist. For the implant to be stable, the capsulo-ligamentous systems must be intact.

Resurfacing capitate pyrocarbon implant as salvage procedure in several serious outcomes of carpal injuries. Clinical experience and follow-up

BACKGROUND AND AIM

Resurfacing Capitate Pyrocarbon Implant has been introduced in the surgical practice as an alternative method to restore wrist motion, strength and functions in patients suffering from wrist osteoarthritis. It has already been well described in the literature as a treatment for advanced stages of degenerative wrist diseases which follow scaphoid's and lunate's injuries such as scapho-lunate advanced collapse, scaphoid non-union advanced collapse, and advanced stages of Kienböck disease. Authors extended the use of RCPI to other selected cases of complicated wrist injuries, spreading out from the classic indications for which this device was designed.

METHODS

We discuss 8 cases with serious outcomes of carpal injuries treated with Resurfacing Capitate Pyrocarbon Implant as salvage procedure between 2005 and 2013 by the first author of this paper Results: Among the eight particular selected cases, at a mean 4.3 years follow-up (range 2-11) only one was considered a failure and underwent a total wrist arthrodesis, resolving pain after all. The seven other cases reported good results. Range of Motion, Visual Analogue Scale for pain, subjective satisfaction and radiographical outcomes are reported.

CONCLUSIONS

As a result of this heterogeneous clinical experience, validated by long-term follow-ups in most cases, we think that the use of a Resurfacing Capitate Pyrocarbon Implant can be suggested as an option in the outcomes of various carpal injuries.

Isoelastic resurfacing prosthesis for distal radius fractures: Outcomes in 24 cases with at least 2 years' follow-up

BACKGROUND

Unicompartmental resurfacing prostheses have been reported to be useful for treating comminuted fractures involving the distal radial joint surface in elderly patients with osteoporosis. However, the data on this method remain scarce and further evaluations are needed. The objective of this study was to evaluate the clinical and radiological outcomes after unicompartmental resurfacing prosthesis implantation in patients with distal radius fractures and at least 2 years' follow-up.

HYPOTHESIS

Outcomes with Prosthelast® are as good in the mid-term as in the short term.

MATERIALS AND METHODS

We studied 24 patients with type C fractures in the AO classification. The Prosthelast® prosthesis was implanted in each. Mean age was 78 years (60 to 91). There were 22 females. Three of the fractures were open. The patients were evaluated clinically using a visual analogue scale (VAS) for pain, ranges of motion at the wrist, and grip strength. In addition, functional scores were determined, and radiographs obtained.

RESULTS

Mean follow-up was 55.2 months (24-97). Mean tourniquet time was 61.9minutes (37-126). Mean motion ranges were 39° in flexion, 49° in extension, 74° in pronation, and 68° in supination. The mean VAS pain score was 2.1 (0-7). The mean Quick DASH was 39.8 (9.09-77), the mean PRWE was 42.7 (5-95), and mean grip strength was 38 (25-150). Painful motion limitation of the elbow was noted in a patient treated with total elbow prosthesis. Complex regional pain syndrome developed in 6 patients, and 5 patients required revision surgery. Asymptomatic perforation of the radial head occurred in 8 patients. No cases of peri-prosthetic osteolysis or osteoarthritis were noted. The prosthesis impinged on the lunate bone in 2 patients and on the scaphoid bone in one patient. Mean ulnar variance was +0.17mm (-1 to 7.5). Bone remodelling about the prosthesis was noted in all the patients, but 2.

DISCUSSION

Our data obtained after a mean follow-up of 55 months indicate that resurfacing prostheses have a role to play in the treatment of comminuted articular fractures in patients with osteoporosis. A long-term study is needed to further evaluate these results.

LEVEL OF EVIDENCE

IV; therapeutic.

Resurfacing capitate pyrocarbon implant after proximal row carpectomy: A litterature review

Up to a decade ago, to treat patients with chronic wrist pain due to advanced stages of arthritis, surgeons had four main solutions: partial or total wrist arthrodesis, total wrist prosthesis and proximal row carpectomy (PRC). Since 2010, a new technique has been described in literature using the Resurfacing Capitate Pyrocarbon Implant (RCPI), combined to PRC. The aim of this article is to review the literature and determine the indications, outcomes and complications associated with RCPI. An electronic literature research was carried out and pertinent articles were selected. Surgical technique, results and complications described in those articles are presented. From this review of the literature, authors conclude that Resurfacing Capitate Pyrocarbon Implant can be considered as a good alternative to arthrodesis and total wrist arthroplasty, at any ages, when proximal row carpectomy alone would not be indicated.

Re-motion total wrist arthroplasty: 39 non-rheumatoid cases with a mean follow-up of 7 years

We evaluated the outcomes of the Re-motion total wrist arthroplasty in 39 non-rheumatoid patients. The mean follow-up was 7 years (range 3-12). Postoperative wrist flexion-extension and radial-ulnar deviation as well as the scores of the Disability of Arm Shoulder and Hand questionnaire and the visual analogue scale pain scores improved significantly. Complications occurred in 13 wrists, five of which required further surgery. The most frequent complication was impingement between the scaphoid and the radial implant (n = 5), which can be avoided by complete or almost complete scaphoid resection. Periprosthetic radiolucency developed around the radial component in three cases and three radial screws loosened. Despite the incidence of high implant survival in 38 of 39 wrists over 7 years (97%), the complication rate is not satisfying. Knowledge of the risk of complications and patient selection are essential when making the decision to choose wrist arthroplasty over arthrodesis. Level of evidence: IV.

Survival Rate on a 10-Year Follow-Up of Total Wrist Replacement Implants: A 23-Patient Case Series

Background  According to current literature, the estimated average survival rate for Remotion, the total wrist implants, is above 90% on an 8-year follow-up. We examined our series of Remotion to calculate its survival rate on a 10-year follow-up. Case Description  A total of 23 cases of total wrist implants were reviewed. The case series included 22 patients, 18 females and 4 males, of an average age of 55 years. The case series included 19 inflammatory rheumatic diseases, 3 Kienböck disease, and 1 posttraumatic arthrosis. Conclusion  The average survival rate of our case series was 95.7% on a 4-year follow-up, 91.3% on a 6-year follow-up, and 69% on a 10-year follow-up. On our review, the QuickDASH score, pain, wrist extension range of motion, and grip strength were improved postoperatively. No difference was shown between preoperative and postoperative values for wrist flexion, pronation, and supination. The case series included a septic case, treated by arthrodesis, and three total wrist implants displacements, two of which were treated by carpal implant, and the remaining one was treated by arthrodesis. Clinical Relevance  The survival rate of the total wrist replacement implant Remotion was estimated to be 69%.

High precision and accuracy of model-based RSA for analysis of wrist arthroplasty

Radiostereometric analysis (RSA) is a method for measuring micromotion in joint arthroplasties. RSA has never been used in total wrist arthroplasties. We evaluated: (i) the precision of model-based RSA in total wrist arthroplasties measured in a phantom model and in patients; (ii) the number of bone markers necessary to ensure the precision; and (iii) the accuracy of model-based RSA in a phantom model. Reverse engineered models of radial and carpal/metacarpal components of two wrist arthroplasties (ReMotion® and Motec®) were obtained by laser scanning. Precision and accuracy of each arthroplasty were analyzed with regards to translation and rotation along the three coordinate axes. Precision was analyzed in 10 phantom and 30 clinical double examinations for each arthroplasty, and was expressed by a repeatability coefficient. The precision of different numbers and configurations of bone markers in the phantom model were compared. Accuracy was tested in a phantom model where the implants were attached to a micrometer, and was defined as the mean difference between measured and true migration. In the phantom model the precision for translations ranged from 0.03 to 0.14 mm and for rotations from 0.18 to 1.52°. In patients the precision for translations ranged from 0.06 to 0.18 mm, and for rotations from 0.32 to 2.18°. Less than four bone markers resulted in inferior precision. Accuracy ranged from -0.06 to 0.04 mm, and from -0.38 to -0.01°. Y-rotations could not be obtained from the Motec® due to rotational symmetry about the longitudinal axis. We conclude that model-based RSA in total wrist arthroplasties is precise, accurate, and feasible to use for clinical evaluation of micromotion in wrist arthroplasties. © 2018 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 36:3053-3063, 2018.

Wrist arthroplasty using prosthesis as an alternative to arthrodesis: design, outcomes and future

We developed an uncemented screw-shaped ball-and-socket wrist prosthesis and modified it during a decade of trails from 1996 to 2005. The final Motec® wrist prosthesis was launched in 2006. Since then we have used this prosthesis in 110 wrists (110 patients) from 2006 to 2018. This article reviews the design, functional outcomes, complications, clinical usefulness and possible future modifications of the Motec® wrist prosthesis.

Update on the operative treatment of scapholunate instability for radiologists. II. Salvage procedures, total wrist arthrodesis, and total wrist arthroplasty

Scapholunate (SL) instability is the most common form of carpal instability. Imaging (especially radiography) plays an important role in the staging, management, and postoperative follow-up of SL instability. In the final stage of SL instability, known as scapholunate advanced collapse, progressive degenerative changes occur at the carpal level. The goals of this article are to review the surgical options available for addressing the different stages of scapholunate advanced collapse, along with an emphasis on normal postoperative imaging and complications associated with each surgical option.