Thumb carpal metacarpal arthritis

Suture Suspension Arthroplasty for the Treatment of Thumb Carpometacarpal Arthritis

PURPOSE

Most studies have demonstrated little difference in the outcome of the various techniques proposed for the surgical treatment of thumb carpometacarpal (CMC) arthritis. However, the difficulty and time required to perform each technique vary widely. In addition, the introduction of recent implants has increased the cost of the overall procedure. We hypothesize that using a simple, yet stable, suture suspension technique without tendon interposition or ligament reconstruction yields similar results to conventional approaches with less operative time.

METHODS

Three hundred twenty consecutive patients underwent thumb CMC arthroplasty by trapezial excision and metacarpal suspension using #2 high-strength orthopedic suture locked weave alone passed from the distal most abductor pollicis longus and flexor carpi radialis insertions without K-wire fixation or tendon transfer. Average duration of preoperative symptoms was 17.8 months. Patient radiographs were graded for arthritis severity and a visual analog scale (VAS) pain score (scale 0-10) obtained. Postoperative clinical and radiological follow-up averaged 5.4 years (minimum, 24 months).

RESULTS

The average age at surgery was 57.3 years and there were 221 women (243 procedures) and 65 men (77 procedures). Average total operative time was 23.4 minutes. The dominant hand was involved in 52% of patients. All had prior treatment including orthoses and nonsteroidal anti-inflammatory drugs with 312 having had at least 1 steroid injection. Five patients had stage 1, 134 had stage 2, 164 had stage 3, and 17 had stage 4 disease on radiographs. Average trapezial space height on final follow-up radiographs was 0.8 cm. Two patients had complete trapezial space collapse and required a revision procedure. The average VAS score was 0.6 with pain eliminated in 269 thumbs, minimal in 49, and unchanged/worse in 2. All patients that were employed at the time of surgery returned to work at an average of 2.3 months (range, 3-16 weeks).

CONCLUSIONS

Suture suspension thumb CMC arthroplasty provides comparable clinical results and several advantages over many current techniques that are described in the literature. The advantages include shortened operative time, inherent stability of the thumb metacarpal height, and no necessity for K-wire fixation, tendon transfers, or implants.

TYPE OF STUDY/LEVEL OF EVIDENCE

Therapeutic IV.

Human Acellular Dermis as Spacer for Small-Joint Arthroplasty: Analysis of Revascularization in a Rabbit Trapeziectomy Model

BACKGROUND

Carpometacarpal joint osteoarthritis affects 8 to 12 percent of the general population. Surgical management provides symptomatic relief for 78 percent of patients who fail conservative therapy, but little consensus exists regarding which surgical procedure provides superior patient outcomes. Recent human trials substituted exogenous acellular dermal matrices in the bone space, but there are no quantitative histologic data on the outcome of acellular dermal matrices in this environment. The authors aimed to quantify the revascularization and recellularization of acellular dermal matrices in the joint space using a rabbit model.

METHODS

Bilateral lunate carpal bones were surgically removed in New Zealand rabbits. Acellular dermal matrix and autologous tissue were implanted in place of the lunate of the right and left wrists, respectively. Acellular dermal matrix was also implanted subcutaneously as a nonjoint control. Histologic and immunofluorescence analysis was performed after collection at 0, 6, and 12 weeks.

RESULTS

Quantitative analysis of anti-α-smooth muscle actin and CD31 immunofluorescence revealed a sequential and comparable increase of vascular lumens in joint space and subcutaneous acellular dermal matrices. In contrast, autologous tissue implanted in the joint space did not have a similar increase in α-smooth muscle actin-positive or CD31-positive lumens. Semiquantitative analysis revealed increased cellularity in both autologous and acellular dermal matrix wrist implants at each time point, whereas average cellularity of subcutaneous acellular dermal matrix peaked at 6 weeks and regressed by 12 weeks. Trichrome and Sirius red staining revealed abundant collagen at all time points.

CONCLUSION

The trapeziectomy joint space supports both cellular and vascular ingrowth into human acellular dermal matrix.

Description and Clinical Assessment of the Bone Block Tendon Interposition Technique for the Management of Thumb Carpometacarpal Joint Osteoarthritis

BACKGROUND

Pellegrini's surgical technique is the most useful for thumb carpometacarpal joint osteoarthritis. The purpose of this paper is to describe the technique of a modified version using a bone block in the tunnel through which the flexor carpi radialis tendon is passed (BBTI).

METHODS

Case series of patients diagnosed with osteoarthritis of the thumb carpometacarpal joint, in stage II or higher based on Eaton's classification, that were intervened using the BBTI technique for a 2-year period. Grip and pinch strength, range of motion, and 1-2 metacarpal angle were evaluated. Pain and function were measured using the visual analogue scale and the Disabilities of the Arm, Shoulder and Hand (DASH) scale.

RESULTS

The study included 16 cases in 14 patients (11 women and 3 men), with an average age of 55.7 ± 7.1 years. Encouraging results were obtained, with an average DASH score of 24.3 ± 17.9 and a minimum VAS pain score. A total of 58% showed a grip strength of over 80% and the postoperative movement was equivalent to the contralateral limb. No cases of infection were reported, and only two minor complications were observed.

CONCLUSIONS

The BBTI technique is a surgical option that incorporates an interference screw, offering good functional results for managing osteoarthritis of the thumb carpometacarpal joint, with a similar complication rate to that of the original technique.

Thumb Basal Joint Arthritis

The thumb basal joint is the second most common site of osteoarthritis in the hand, and osteoarthritis of this joint can contribute to painful movement and debilitating function. To achieve a high degree of prehensile and manipulative function, this highly mobile joint is constrained by both the saddle morphology of the trapezium and a stout complement of ligamentous constraints. The disease proceeds progressively with several wear patterns. Substantial new biomechanical and longitudinal clinical studies have changed some of the prevailing opinions on the process of serial degenerative changes. Diagnosis is made with a thorough clinical examination and radiographic staging, as described by Eaton and Littler. Thumb basal joint arthritis can be initially managed with medications, orthoses, and steroid injections; however, it frequently progresses despite these interventions. Surgical management commonly consists of trapeziectomy with or without interposition or suspension, arthroplasty with implant, volar ligament reconstruction, osteotomy, or arthrodesis; none of these techniques has been proved to be superior to the others.

A Cadaveric Study of the Mean Distance of the Radial Artery During the Approach to the First Carpometacarpal Joint

Multiple surgical procedures have been described to treat first carpometacarpal (CMC) arthritis. Although the superiority of one procedure over the others continues to be a controversial topic, they all approach the trapezium and require careful attention to the surrounding structures. One potential complication is injury to the radial artery, which lies in close proximity to the trapezium and is often encountered during surgical approach. Using cadaveric specimens, the authors dissected to identify and isolate the radial artery as it travels in the forearm, wrist, and hand while being careful not to disturb its native course. The authors then measured the shortest distance interval from the radial artery to the first CMC joint and from the radial artery to the scaphotrapeziotrapezoidal joint. Descriptive statistics were calculated from these measurements and averaged over the various specimens. The mean distance of the radial artery to the closest segment of the volar CMC joint was 11.6±2.5 mm. The mean distance of the radial artery to the closest segment of the volar scaphotrapeziotrapezoidal joint was 1.6±1.8 mm. A precise understanding of nearby anatomy is paramount to a successful surgical treatment for first CMC arthritis and to avoid iatrogenic complications. The authors describe the mean distance from the radial artery to 2 major landmarks used during surgical treatment and provide insight to surgeons who perform these CMC reconstruction procedures to decrease the risk of intraoperative radial artery injury. [Orthopedics. 2018; 41(4):e541-e544.].

The Teleology of the Thumb: On Purpose and Design

The Andrew J. Weiland Medal is presented by the American Society for Surgery of the Hand to a midcareer researcher dedicated to advancing patient care in the field of hand surgery. The Weiland Medal for 2017 was presented to the author at the annual meeting of the American Society for Surgery of the Hand. The purpose of this article is to present current evidence on how biomechanics and morphology influence the pathophysiology of thumb carpometacarpal joint osteoarthritis.

Changes in Local Bone Density in Early Thumb Carpometacarpal Joint Osteoarthritis

PURPOSE

Thumb carpometacarpal (CMC) osteoarthritis (OA) represents a major source of functional morbidity. The effects of early CMC OA on loading and use patterns potentially lead to changes in local bone density and microarchitecture. Hounsfield units (HU), a quantitative attenuation coefficient obtained from computed tomography (CT) scans, have been shown to be a reliable marker of bone density. We hypothesized that early CMC OA is associated with lower local bone density about the CMC joint as assessed by HU.

METHODS

We examined HU units from CT scans in 23 asymptomatic subjects and 91 patients with early CMC OA. The HU measurements were obtained within cancellous portions of the trapezium, capitate, first and third metacarpal bases, and distal radius. Linear regression models, with age and sex included as covariates, were used to assess the relationship between CMC OA and HU values at each anatomical site.

RESULTS

Early OA patients had significantly lower HU than asymptomatic subjects within the trapezium (mean, 377 HU vs 436 HU) and first metacarpal bases (265 HU vs 324 HU). No significant group differences were noted at the capitate, third metacarpal, or distal radius. Male sex and younger age were associated with significantly higher HU at all the anatomical sites, except the first metacarpal base, where age had no significant effect.

CONCLUSIONS

Subjects presenting with early CMC OA had significantly lower bone density as assessed with HU at the thumb CMC joint (trapezium and first metacarpal base). Early thumb CMC OA and discomfort may lead to diminished loading across the basal joint, producing focal disuse osteopenia. These findings in symptomatic early arthritis suggest a relationship between symptoms, functional use of the CMC joint, and local bone density.

TYPE OF STUDY/LEVEL OF EVIDENCE

Diagnostic II.

Optimal management of thumb basal joint arthritis: challenges and solutions

Up to 15% of the population older than 30 years suffers from symptomatic thumb carpometacarpal (CMC) osteoarthritis (OA), with the incidence increasing to ~33% in postmenopausal women. The thumb CMC joint has been reported as the most painful joint when compared to other hand joints affected by OA. It is therefore no surprise that this is a common chief complaint of patients and has a significant effect on work and life satisfaction. The purpose of this article was to review currently available literature to discuss nonoperative and operative techniques utilized to treat the various stages of thumb CMC arthritis. A variety of nonoperative and operative techniques have been described in the literature, each with its own benefits and pitfalls. This review concludes that while many treatment options exist, there remains no perfect treatment, but the goal of improving quality of life and patient satisfaction remains the same.

What Demographic and Clinical Characteristics Correlate With Expectations With Trapeziometacarpal Arthritis?

BACKGROUND

Pretreatment variables have been shown to be associated with the fulfillment of patient expectations, yet in treating thumb trapeziometacarpal osteoarthritis (OA) it remains unclear how patient expectations correlate with the effectiveness of treatment. An increased understanding of the variables that affect patient expectations enables tailored patient education and patient-provider communication.

QUESTIONS/PURPOSES

(1) Is there a correlation between patient demographics and clinical characteristics, and the expectations the patients have when seeking treatment for trapeziometacarpal OA? (2) What factors are independently associated with the total expectations score and frequency of expecting "back to normal" among patients treated for trapeziometacarpal OA?

METHODS

Between March 2011 and October 2013, 89 patients of all 96 eligible patients seeking treatment for trapeziometacarpal OA were approached and agreed to participate in this study. Participants completed a validated expectations survey measuring the number of expectations and the degree of improvement expected. Comparative analysis of demographic and clinical characteristics and multivariate regression analysis against patients' expectations were performed to assess and identify factors that correlate with the number and degree of expectations. Sample size was determined with an a priori power analysis (with 80% power and statistical significance set at p < 0.05), which showed that 88 patients were needed to detect the minimal clinical difference of 12 points in the Michigan Hand Questionnaire; we then increased this by 10% to allow for potential dropouts.

RESULTS

After controlling for potential confounding variables such as age, hand dominance, and work status, the following factors were associated with a higher expectations score: choice of surgery (β = 11.5; 95% CI, 0.7-23.8; p = 0.044), female gender (β = 19.0; 95% CI, 5.3-32.7; p = 0.007), and dominant side affected (β = -41.6; 95% CI, -63.7 to -19.5; p < 0.001). For the frequency of "back to normal" responses, surgical treatment (β = 7.4; 95% CI, 2.3-12.4; p = 0.005) and history of previous injury (β = 8.2; 95% CI, 0.1-16.3; p = 0.047) were independently associated factors after controlling for confounding variables. There were no independent associations with age, marital status, work status, depression or anxiety, or prior contralateral surgery.

CONCLUSIONS

Patients whose dominant side was affected, were female, and chose surgical treatment, had higher total expectations. Patients who reported an antecedent injury and chose surgical treatment more frequently expected a return to normal. With identification of these factors, orthopaedic surgeons can recognize patients who are prone to higher expectations, and, thus, have the opportunity to implement efficient pretreatment education. In addition, identification of specific factors enables a focused measure of the effect of these factors on the fulfillment of expectations.

LEVEL OF EVIDENCE

Level II, prognostic study.

Arthroscopic Management of Bennett Fracture

Bennett fracture is the most common fracture of the thumb. Choosing the appropriate approach to fracture fixation requires a thorough knowledge of the anatomy surrounding the first carpometacarpal joint, which is necessary to prevent injury to local sensory nerves and tendons. Although no study has shown superior outcomes compared with open reduction internal fixation and fluoroscopically guided closed reduction and percutaneous pinning, arthroscopic-assisted fixation allows for debridement of the carpometacarpal joint, direct visualization of the articular surface during reduction, and has minimal morbidity and associated complications.

The effectiveness of orthoses in the conservative management of thumb CMC joint osteoarthritis: An analysis of functional pinch strength

STUDY DESIGN

The study was a retrospective cohort analysis for a 19-month period from May 2013 to December 2014.

INTRODUCTION

Although the use of orthoses has long been a staple of conservative treatment measures for individuals with osteoarthritis of the thumb carpometacarpal (CMC) joint, there remains little evidence exploring its effectiveness in improving functional outcomes for this client population.

PURPOSE OF THE STUDY

The purpose of this study was to assess the effectiveness of 3 frequently used orthoses in improving the functional pinch strength of adults with a diagnosis of thumb CMC joint osteoarthritis.

METHODS

A retrospective cohort analysis was conducted to determine whether pinch strength improved after orthotic fabrication, and fitting in patients referred to a hand therapy clinic.

RESULTS

Patients who received a Colditz design orthosis had a mean increase of 2.64 lb with regard to functional pinch strength after orthotic fabrication and fitting. Patients who received a Comfort Cool orthosis (North Coast Medical, Morgan Hill, CA) had a mean increase of 2.47 lb, whereas patients who received a Thumb Spica orthosis had a mean increase of 3.25 lb. There was no evidence of any statistically significant difference in the average improvements in pinch strength between the Colditz design orthosis and the Comfort Cool orthosis.

CONCLUSIONS

Results from this study demonstrate that orthosis wear consistently increases the functional pinch strength of individuals with thumb CMC joint osteoarthritis. Large-scale multisite research studies comparing various orthotic designs are necessary to help therapists determine best practice interventions for the conservative management of thumb CMC joint osteoarthritis.

LEVEL OF EVIDENCE

2(c).

Reduction in Cylindrical Grasp Strength Is Associated With Early Thumb Carpometacarpal Osteoarthritis

BACKGROUND

Advanced thumb carpometacarpal (CMC) osteoarthritis (OA) can cause substantial impairment in hand function, from grasping heavy objects to fine manipulation of implements and tools. In the clinical setting, we commonly measure the grip strength of gross grasp with a hand dynamometer in patients with CMC OA. Cylindrical grasp, which requires more thumb contribution than gross grasp, is an alternative method of measuring grip strength and one that may provide insight into thumb-related conditions. Because gross grasp and cylindrical grasp use the thumb in different planes, measurement of gross grasp alone might underestimate impairment. Therefore, it is important to evaluate cylindrical grasp as well. To our knowledge this tool has yet to be examined in a population with early thumb CMC OA.

QUESTIONS/PURPOSES

(1) Is cylindrical grasp and gross grasp strength reduced in subjects with early thumb CMC OA compared with asymptomatic control subjects? (2) What is the association of cylindrical and gross grasp to thumb CMC OA after adjusting for age, sex, and hand dominance?

METHODS

We recruited 90 subjects with early symptomatic and radiographic thumb CMC OA and 38 asymptomatic healthy control subjects for this multisite controlled study. Demographic information, hand examination, comprehensive histories, plain film radiographs, and cylindrical and gross grasp strength data were collected on all 128 subjects. Mean grasp strength was calculated for cylindrical and gross grasp in the population with early CMC OA and the control population. A t-test was performed on cylindrical and gross grasp to evaluate the difference between the mean in the control and early CMC OA populations. We used separate linear regression models for the two types of grasp to further quantify the association of grasp with a diagnosis of early thumb CMC OA controlling for age, sex, and whether the subject used their dominant or nondominant hand in the study.

RESULTS

Cylindrical grasp was weaker in the population with thumb CMC OA compared with healthy control subjects (6.3 ± 2.7 kg versus 8.4 ± 2.5 kg; mean difference, 2.1; 95% CI, 1.1-3.1; p < 0.001), but there was no difference in gross grasp force (29.6 ± 11.6 kg versus 31.4 ± 10.1 kg; mean difference, 1.7; 95% CI, -2.5 to 6.0; p = 0.425). When adjusting for age, sex, and handedness, cylindrical grasp reduction was related to CMC OA (β = -2.3; standard error [SE], 0.46; p < 0.001) (Y-intercept = 8.2; SE, 1.8; R² = 0.29), whereas gross grasp was not reduced in early thumb CMC OA (β = -2.8; SE, 1.6; p = 0.072) (Y-intercept = 34.3; SE, 6.3; R² = 0.48).

CONCLUSIONS

A reduction in cylindrical grasp is associated with early symptomatic and radiographic CMC OA, whereas gross grasp is not associated with early thumb CMC OA, suggesting that cylindrical grasp may be a better tool to detect changes in thumb and hand function seen during early disease stages.

CLINICAL RELEVANCE

Cylindrical grasp may serve as a more-sensitive measure for detecting early changes in early CMC OA. The associated decline in hand function also might provide an opportunity for measuring the effectiveness of treatment and intervention.

Biomechanical Comparison of Suture-Button Suspensionplasty and LRTI for Basilar Thumb Arthritis

Background: The purpose of this study was to compare the initial biomechanical strength of trapeziectomy and suture-button suspensionplasty (SBS) with ligament reconstruction and tendon interposition (LRTI) for thumb carpometacarpal (CMC) arthritis in a cadaveric model. Methods: Eight matched pairs of below-elbow cadaveric arms were used for this study. Each specimen was randomly assigned to either receive a trapeziectomy and LRTI (LRTI group) or trapeziectomy and SBS (SBS group). Using previously described and validated testing protocols, physiological key pinch was simulated. The thumb metacarpal was then incrementally loaded from 5 to 20 lbs, using 5-lb increments. Metacarpal subsidence during physiological key pinch and incremental loading was determined using radiographic measurements of trapezial space height. Results: The average pretesting trapezial space height did not differ significantly between the LRTI (11.9 mm) and SBS (13.7 mm) groups. After simulated physiological key pinch, the SBS group had significantly greater average trapezial space height compared with the LRTI group (8.0 mm vs 5.5 mm). For each incremental metacarpal load from 5 to 20 lbs, the SBS group had significantly greater average trapezial space height than the LRTI group. Conclusions: In a cadaveric model, SBS demonstrates greater resistance to metacarpal subsidence with immediate loading compared with LRTI.

First Carpo-metacarpal Joint Arthritis: Interpositional Arthroplasty using Trapezium

Thumb pain secondary to arthritis at the basal joint of the thumb is a common condition, especially in women, and can be quite disabling. An accurate diagnosis can be readily made from the history and examination. Reconstructive procedures for each stage of the disease are aimed at relieving pain and restoring thumb motion and strength. There are a number of methods available to treat this condition both conservatively and surgically with variable success rates. We present a case of a middle-aged female with first carpo-metacarpal (CMC) joint arthritis in whom we have tried a new technique in which the trapezium is excised, crushed, put in a sponge covering and then inserted back in the void created after excision. At the one-year follow-up, the patient was pain-free and had full range of thumb movement.

First dorsal interosseous muscle contraction results in radiographic reduction of healthy thumb carpometacarpal joint

INTRODUCTION

Hand therapists selectively strengthen the first dorsal interosseus (FDI) to stabilize arthritic joints yet the role of the FDI has not yet been radiographically validated.

PURPOSE

To determine if FDI contraction reduces radial subluxation (RS) of the thumb metacarpal (MC).

METHODS

Fluoroscopy was used to obtain true anterior-posterior radiographs of non-arthritic CMC joints: 1) at rest, 2) while stressed and 3) while stressed with maximal FDI contraction. Maximal FDI strength during CMC stress and thumb MC RS and trapezial articular width were measured. The ratio of RS to the articular width was calculated.

RESULTS

Seventeen participants (5 male, 12 female) participated. Subluxation of a stressed CMC significantly reduced and the subluxation to articular width ratio significantly improved after FDI activation.

CONCLUSIONS

Contraction of the FDI appears to radiographically reduce subluxation of the healthy thumb CMC joint. Further exploration on the FDI's reducibility and its carry-over effects in arthritic thumbs is needed.

LEVEL OF EVIDENCE

4.

The effect of individual isometric muscle loading on the alignment of the base of the thumb metacarpal: a cadaveric study

Stability of the thumb carpometacarpal joint relies upon equilibrium between its ligaments, muscular support and joint congruity. We wanted to identify the muscles important in preventing or increasing dorsoradial subluxation of this joint. In ten cadaveric hands, a Fastrak® motion tracking device was used to assess the effects of individual isometric muscle loading on the base of the thumb metacarpal relative to the radius and to the base of the middle finger metacarpal. We found that the first dorsal interosseous muscle caused the least dorsoradial translation and highest distal migration of the base of the first metacarpal, whereas abductor pollicis longus was the primary destabilizer, increasing dorsoradial misalignment. The findings show different impacts of these muscles on joint alignment and stability, which suggests that treatment should be targeted to enhance the action of the primary stabilizing muscle, the first dorsal interosseous muscle.

Weaker Functional Pinch Strength Is Associated With Early Thumb Carpometacarpal Osteoarthritis

BACKGROUND

The thumb carpometacarpal (CMC) joint orchestrates pinch in its various positions, and thumb CMC osteoarthritis (OA) is a major source of orthopaedic morbidity. Self-reported pain, weakness, and physical examination may not correspond to radiographic findings when diagnosing early thumb CMC OA. Weakness is a prominent feature of the disease, but little evidence exists to quantify self-reported loss of strength with time, or to compare weakness with that of a nonarthritic population during early disease.

QUESTIONS/PURPOSES

We asked: (1) Is pinch strength in subjects with early thumb CMC OA less than that in asymptomatic control subjects; and (2) weakness in which pinch position (key, tripod, or tip pinch) has the strongest association with early OA diagnosis?

METHODS

For this case-control study, we recruited 23 subjects who were asymptomatic and 91 with early OA for comprehensive history, physical examination, strength measurements, pain surveys, and radiographic evaluation. We used multivariate logistic regression to quantify the association between declining pinch strength and early OA diagnosis after controlling for age, sex, and BMI. This analysis was performed for three different pinch positions (key, tripod, and tip pinch) to evaluate which measurement was most closely associated with diagnosis.

RESULTS

Pinch strength was less in patients with early thumb CMC OA. Key pinch had the most robust association with OA diagnosis, in which a 20% decrease in key pinch strength from the control subjects' baseline was associated with a 10% increase in the OA diagnosis (95% CI, 3%-16%; p = 0.004). This had a stronger association with OA diagnosis than tip pinch, in which a 20% decrease in strength was associated with a 6% increase in early CMC OA (95% CI, 1.0%-11%; p = 0.031). Tripod pinch also was associated to a lesser extent; a 20% reduction in tripod pinch led to a 5% increase in OA (95% CI, 1.3%-9%; p = 0.048).

CONCLUSIONS

Decreasing pinch strength, especially key pinch, is associated with early CMC arthritis before the development of extensive radiographic disease.

CLINICAL RELEVANCE

Weakness in pinch strength, especially key pinch, is an important feature in the pathogenesis of early CMC OA and may appear before radiographic disease is present or advanced. These findings suggest a role for intervention in early disease for promoting nonoperative joint protection and strengthening, and designing surgical procedures aimed to delay or prevent clinical and radiographic progression.

Patients With Thumb Carpometacarpal Arthritis Have Quantifiable Characteristic Expectations That Can Be Measured With a Survey

BACKGROUND

Although patient expectations associated with major orthopaedic conditions have shown clinically relevant and variable effects on outcomes, expectations associated with thumb carpometacarpal (CMC) arthritis have not been identified, described, or analyzed before, to our knowledge.

QUESTIONS/PURPOSES

We asked: (1) Do patients with thumb CMC arthritis express characteristic expectations that are quantifiable and have measurable frequency? (2) Can a survey on expectations developed from patient-derived data quantitate expectations in patients with thumb CMC arthritis?

METHODS

The study was a prospective cohort study. The first phase was a 12-month-period involving interviews of 42 patients with thumb CMC arthritis to define their expectations of treatment. The interview process used techniques and principles of qualitative methodology including open-ended interview questions, unrestricted time, and study size determined by data saturation. Verbatim responses provided content for the draft survey. The second phase was a 12-month period assessing the survey for test-retest reliability with the recruitment of 36 participants who completed the survey twice. The survey was finalized from clinically relevant content, frequency of endorsement, weighted kappa values for concordance of responses, and intraclass coefficient and Cronbach's alpha for interrater reliability and internal consistency.

RESULTS

Thirty-two patients volunteered 256 characteristic expectations, which consisted of 21 discrete categories. Expectations with similar concepts were combined by eliminating redundancy while maintaining original terminology. These were reduced to 19 items that comprised a one-page survey. This survey showed high concordance, interrater reliability, and internal consistency, with weighted kappa values between 0.58 and 0.78 (95% CI, 0.39-0.78; p < 0.001); intraclass correlation coefficient of 0.94 (95% CI, 0.94-0.98; p < 0.001), and Cronbach's alpha values of 0.94 and 0.95 (95% CI, 0.91-0.96; p < 0.001). The thumb CMC arthritis expectations survey score is convertible to an overall score between 0 to 100 points calculated on the basis of the number of expectations and the degree of improvement expected, with higher scores indicating higher expectations.

CONCLUSIONS

Patients with thumb CMC arthritis volunteer a characteristic and quantifiable set of expectations. Using responses recorded verbatim from patient interviews, a clinically relevant, valid, and reliable expectations survey was developed that measures the physical and psychosocial expectations of patients seeking treatment for CMC arthritis. The survey provides a calculable score that can record patients' expectations. Clinical application of this survey includes identification of factors that influence fulfilment of these expectations.

LEVEL OF EVIDENCE

Level II, prospective study.

Radiographic Stage Does Not Correlate With Symptom Severity in Thumb Basilar Joint Osteoarthritis

BACKGROUND

We hypothesize that thumb basilar joint osteoarthritis (TBJA) radiographic stage does not correlate with patient-reported measures of symptom severity.

METHODS

Patients with unilateral TBJA who completed the 11-item QuickDASH (Disabilities of the Arm, Shoulder, and Hand), Short-Form 12 Health Survey (SF-12) Mental Component and SF-12 Physical Component surveys were prospectively enrolled in the study. The Eaton-Littler radiographic stage was assigned for each patient. The correlation between the radiographic score and disease stage was calculated.

RESULTS

Sixty-two patients (15 men, 47 women; average age, 62.3 years) formed the basis of this study. The average QuickDASH score (and standard deviation) for patients with stage 1 TBJA was 31.5 (11.4); for those with stage 2, it was 37.9 (17.4); with stage 3, it was 30.1 (13.0), and with stage 4, it was 39.4 (12.5). Eaton-Littler stage did not correlate significantly with QuickDASH scores (rho = -0.014, P = 0.91). Neither SF-12 Mental Component scores (MCS-12: rho = 0.019, P = 0.89) nor the SF-12 Physical Component scores (PCS-12: rho = 0.145, P = 0.26) correlated with TBJA stage.

CONCLUSION

Radiographic severity in TBJA does not correlate with validated patient-reported symptom scores. Metrics that link radiographic and subjective components of TBJA may improve surgical decision making and monitoring of treatment response.

LEVEL OF EVIDENCE

Prognostic, level II.

Altered Innervation Pattern in Ligaments of Patients with Basal Thumb Arthritis

Purpose The population of mechanoreceptors in patients with osteoarthritis (OA) lacks detailed characterization. In this study, we examined the distribution and type of mechanoreceptors of two principal ligaments in surgical subjects with OA of the first carpometacarpal joint (CMC1). Methods We harvested two ligaments from the CMC1 of eleven subjects undergoing complete trapeziectomy and suspension arthroplasty: the anterior oblique (AOL) and dorsal radial ligament (DRL). Ligaments were divided into proximal and distal portions, paraffin-sectioned, and analyzed using immunoflourescent triple staining microscopy. We performed statistical analyses using the Wilcoxon Rank Sum test and ANOVA with post-hoc Bonferroni and Tamhane adjustments. Results The most prevalent nerve endings in the AOL and DRL of subjects with OA were unclassifiable mechanoreceptors, which do not currently fit into a defined morphological scheme. These were found in 11/11 (100%) DRLs and 7/11 (63.6%) AOLs. No significant difference existed with respect to location within the ligament (proximal versus distal) of mechanoreceptors in OA subjects. Conclusion The distribution and type of mechanoreceptors in cadavers with no to mild OA differ from those in surgical patients with OA. Where Ruffini endings predominate in cadavers with no to mild OA, unclassifiable corpuscles predominate in surgical patients with OA. These findings suggest an alteration of the mechanoreceptor population and distribution that accompanies the development of OA. Clinical Relevance Identification of a unique type and distribution of mechanoreceptors in the CMC1 of symptomatic subjects provides preliminary evidence of altered proprioception in OA.

Efficacy of treatments and pain management for trapeziometacarpal (thumb base) osteoarthritis: protocol for a systematic review

INTRODUCTION

The thumb is essential for daily activities. Unfortunately, this digit is commonly affected by trapeziometacarpal osteoarthritis (TMO), handicapping a large number of individuals. TMO constitutes an increasing human and economic burden for our society whose population is ageing. Limited access to adequate treatment is among the most important obstacles to optimal TMO management. Poor understanding of TMO characteristics, lack of knowledge about evidence-based treatments, simplistic pain management plans based solely on the patient's physical condition, absence of interprofessional communication and lack of multidisciplinary treatment guidelines contribute to inadequate TMO management. On the long term, our research project aims at improving the quality of care and services offered to patients with TMO by developing a patient-centred, evidence-based multidisciplinary management clinical pathway coordinated across the healthcare system. This proposed systematic review is a prerequisite to ensuring evidence-based practices and aims to document the efficacy of all the existing modalities for TMO management.

METHODS AND ANALYSIS

The protocol of the systematic review is registered with PROSPERO and will be conducted using the guidelines Cochrane Handbook for Systematic Reviews of Interventions. We will identify studies in English and French concerning TMO treatments through searches in Cochrane Central, EMBASE, MEDLINE, PsychINFO, CINHAL, PubMed, OT Seekers, PEDRO and the grey literature. 2 reviewers will independently screen study eligibility, extract data and appraise studies using published assessment tools. Meta-analyses will be undertaken where feasible; otherwise, narrative syntheses will be carried out. The robustness of evidence will be assessed using the GRADE system.

ETHICS AND DISSEMINATION

Ethics approval is not required for this study. A comprehensive knowledge exchange and transfer plan incorporating effective strategies will be used to disseminate the findings of this review and utilise them to optimise TMO management.

TRIAL REGISTRATION NUMBER

PROSPERO CRD42015015623.

Male and female differences in musculoskeletal disease

Gender differences exist in the presentation of musculoskeletal disease, and recognition of the differences between men and women's burden of disease and response to treatment is key in optimizing care of orthopaedic patients. The role of structural anatomy differences, hormones, and genetics are factors to consider in the analysis of differential injury and arthritic patterns between genders.

Correlation of clinical disease severity to radiographic thumb osteoarthritis index

PURPOSE

To determine if a slight modification of the 1987 Eaton-Glickel staging and interpreting 4 standardized radiographs for trapeziometacarpal (TMC) osteoarthritis (OA) improved analysis, to determine if a quantifiable index measurement from a single Robert (pronated anteroposterior) view enhanced reproducibility, and to examine whether improved radiographic staging correlated to clinically relevant disease and thus support validity.

METHODS

We analyzed 4 thumb radiographs (posteroanterior, lateral, Robert, and stress views) in 60 consecutive subjects representing an adult population spectrum of asymptomatic to advanced disease. Two experienced hand surgeons (A.L.L. and A.P.C.W.), 1 chief resident (A.J.B.), and 1 medical student (J.M.M.) performed the analysis on each subject's radiographs. We analyzed all 4 radiographs for Eaton and modified Eaton staging and then later analyzed only the Robert view for the thumb osteoarthritis (ThOA) index measurement. The radiographs were randomized and reread a week later for each classification at separate times. Surgically excised trapeziums from 20/60 subjects were inspected for first metacarpal surface disease and correlated to the 3 classifications.

RESULTS

All 3 staging classifications demonstrated high reproducibility, with the intraclass correlation coefficient averaging 0.73 for the Eaton, 0.83 for the modified Eaton, and 0.95 for the ThOA index. Articular wear and metacarpal surface eburnation correlated highest to the ThOA index, with advanced disease 1.55 or greater correlating to Eaton III/IV and modified Eaton stage 3/4 in a linear relationship.

CONCLUSIONS

The ThOA index based on a Robert view provided a measurable alternative to Eaton staging and correlated to severity of surgically relevant thumb TMC OA.

CLINICAL RELEVANCE

A simple reproducible radiographic measurement may enhance TMC OA classification and provide a reliable means to predict clinical disease.

TYPE OF STUDY/LEVEL OF EVIDENCE

Diagnostic II.

Correction of a Hyperextension Deformity at the Metacarpophalangeal Joint by Arthroplasty for Osteoarthritis of the Thumb Carpometacarpal Joint Followed by External Fixator: A Case Series: Modified Ilizarov Method for Correction of a Collapsed Thumb Deformity Due to Carpometacarpal Osteoarthritis

A hyperextension deformity in the advanced stages of carpometacarpal (CMC) arthritis of the thumb could affect the outcomes of thumb CMC joint arthroplasty. We introduce the interesting approach for treating severely collapsed thumb deformities with gradual distraction and coordinated correction of the MCP and CMC joints by means of external fixators. We divided 8 cases into 3 groups according to the angle of passive flexion of the hyperextended MCP joint: group 1, 10-20°, group 2a, 20-40°, and group 2b, >40°, retrospectively. We first performed CMC arthroplasty with trapezium excision. In group 1, we corrected the MCP hyperextension deformity by manual passive flexion and fixed the joint with an extension block Kirshner wire (K-wire) for 2 months. However, deformities recurred in 2 of 5 cases after removing the K-wire. These patients received corrective percutaneous osteotomy with external fixators at the metacarpal neck. In groups 2a and 2b, we performed CMC arthroplasty and set external fixators at the same time. All cases in groups 1 and 2a have been without recurrence for more than 2 years, while a deformity recurred in group 2b. The results of this small case series encouraged us to propose an interesting approach for collapsed zigzag thumb deformity. Good outcomes with excellent maintenance of active MCP movement and no recurrence are highly anticipated if the hyperextended thumb has no obvious degenerative changes and can be corrected by <40° of passive flexion. Our results also indicate a risk of recurrence associated with extension block by K-wire.

Imaging and management of thumb carpometacarpal joint osteoarthritis

Primary osteoarthritis (OA) involving the thumb carpometacarpal (CMC) joint is a common and frequently debilitating disease. Clinical examination and radiographs are usually sufficient for diagnosis; however, familiarity with the cross-sectional anatomy is useful for diagnosis of this condition. The most widely used classification system for the radiographic staging of thumb carpometacarpal joint OA was first presented by Eaton and Littler, ranging from mild (stages I and II) to severe (stage IV) disease. If conservative treatment fails, surgical treatment is considered. A variety of surgical techniques have been developed and implemented for the management of this pervasive and disabling condition. The purpose of this article is to review the anatomy of the basal joints of the thumb, pathophysiology, preoperative imaging, and various surgical techniques that are utilized in the treatment of OA of the basal joints of the thumb with emphasis on normal postoperative radiographic findings and possible postoperative complications.

A novel use for suture button suspension: reconstruction of the dorsal ulnar ligament to treat thumb metacarpal dislocation

There are numerous treatment algorithms that have been developed to treat thumb carpometacarpal (CMC) arthritis. A newer treatment option for these patients is CMC stabilization using suture button suspensionplasty. The authors of this case report have extensive experience with the suture-button suspensionplasty using the Mini TightRope CMC technique (Arthrex). We present a novel usage of the suture-button suspensionplasty to reconstruct the dorsal ulnar ligament (in contrast to the usual reconstruction of the volar beak ligament) to treat a patient with persistent thumb metacarpal dislocation at the CMC joint. Two separate patients are presented. One patient demonstrates volar beak ligament instability, and the other demonstrates dorsal ulnar ligament instability. Both patients' demographics and operative indications are described. The operative technique for the novel usage of the suture-button suspensionplasty is described. Operative results of the dorsal ulnar ligament reconstruction are reviewed. After suture-button suspension of the thumb metacarpal to the trapezium, the dorsal ulnar ligament has been reconstructed. The patient demonstrated stability of the thumb CMC joint without dorsal or radial dislocation. The authors of this case report present a novel usage of the suture-button suspensionplasty to treat a patient with proximal thumb metacarpal dislocation at the trapezial-metacarpal interface. This method, in contrast to the referenced method of volar beak ligament reconstruction, allows reconstruction of the dorsal ulnar ligament. This allows stabilization of the joint by preventing dorsal and radial dislocation of the metacarpal.

Trapezio-metacarpal arthrodesis: procedure and results

The high prevalence of trapezio-metacarpal joint (TMJ) osteoarthritis leads to develop techniques to improve surgical outcomes when conservative treatment has failed. We have evaluated 18 patients with Eaton III TMJ osteoarthritis, who underwent an arthrodesis. Using a dorsal-radial curved shaped skin incision the TMJ was exposed through the space between the abductor pollicis longus and the extensor pollicis brevis muscles. The articular capsule was divided and the TMJ was opened. Neat curettage was then performed in both joint surfaces by removing all the articular cartilage until some cancellous bone hints appeared underneath. The joint was then fixed in the optimal position by a 1.6 mm Kirschner wire and a 1.1 mm guide wire. A cannulated drill for the guide wire was used and matched to a cannulated lag screw. Then, a cylinder-shaped cancellous bone autograft harvested from the distal radius by a percutaneous approach was applied in the hole by drilling backwards in order to spread the bone about onto the hole walls. The joint was then definitively fixed by the cannulated lag screw. The K wires were removed by that time. DASH score changed from an average of 68 in the preoperative assessment to 39.4 at the end of the evolution time. The evolution of pain has decreased from 9.2 points preoperatively to 3.9 points in the postoperative using the visual analogue scale. In terms of mobility, it has decreased from 4 points preoperatively to 3.9 postoperatively, 14 patients got opposition of the thumb to the fifth finger, two of them to the head of the fifth metacarpal bone, one patient to the fourth finger, and one to the third. This slight decrease of mobility had no effect on performing activities of daily life, as expressed by the patients. The grip strength increased from 17 to 21.7 kg and the thumb opposition from 7.8 to 11.2 kg. All patients, except one, would have the operation again after knowing the final results. This patient said that results did not meet previous expectations. On the radiographic evaluation, consolidation has been achieved in 17 patients. When thumb carpo-metacarpal arthrodesis is indicated, the procedure provides a reliable and lasting treatment with satisfactory results. The development of new implants and the possibility of introducing autologous graft percutaneously as is described using this technique leads to improve the results.

First carpometacarpal arthroplasty with ligamentous reconstruction: a long-term follow-up

BACKGROUND

The purpose of the present study is to evaluate a single surgeon's short, intermediate, and long-term clinical, functional, and radiographic outcomes with a trapeziectomy with flexor carpi radialis (FCR) suspension arthroplasty without tendon interposition (LRSA).

METHODS

Twenty-one patients underwent 26 FCR suspension arthroplasties without tendon interposition by a single senior surgeon. All patients had Eaton stage III and IV carpometacarpal (CMC) osteoarthritis. The Patient-Rated Wrist and Hand Evaluation (PRWHE) and Quick Disabilities of Arm, Shoulder, and Hand (QuickDASH) were used to evaluate functional outcomes. A comprehensive strength and range of motion evaluation was performed to evaluate clinical outcomes. Plain radiographs at rest and with maximal pinch were performed to evaluate for arthroplasty space subsidence.

RESULTS

The LRSA exhibited consistent clinical and functional outcomes throughout postoperative follow-up. As the average patient age and time from surgery increased, range of motion (ROM) and PRWHE scores stayed relatively constant, while lateral tip and tip pinch strength deteriorated with time. The LRSA prevented the proximal migration of the first metacarpal in all but one patient. No patients required revision arthroplasty following LRSA.

CONCLUSIONS

This study demonstrates the consistent short, intermediate, and long-term clinical, functional, and radiographic outcomes following a trapeziectomy with FCR suspension arthroplasty.

Imaging of radial wrist pain. Part II: pathology

Pain on the radial side of the wrist is a common clinical presentation. Such wrist pain may provide a diagnostic challenge for radiologists, in view of the small size of the anatomic structures, the occasional subtlety of the imaging findings, the diversity of potential etiologies, as well as the non-infrequent occurrence of incidental asymptomatic findings in this area. This review discusses the imaging findings in both the more common and less common causes of radial-sided wrist pain, concentrating particularly on the detection of early disease and less readily apparent abnormalities.

Comparison of the anatomical dimensions and mechanical properties of the dorsoradial and anterior oblique ligaments of the trapeziometacarpal joint

PURPOSE

The respective roles of the dorsoradial (DRL) and anterior oblique (AOL) ligaments in stability of the highly mobile trapeziometacarpal (TMC) joint remain disputed. Earlier publications have pointed to the AOL as the key stabilizing structure; yet, more recent publications have challenged the stabilizing role of the AOL, favoring the DRL as the main TMC joint stabilizer. We executed an anatomical study of the ligaments, including detailed dissection to quantify the length, width, and thickness of the AOL and DRL and tested the material properties of these ligaments.

METHODS

Thirteen fresh frozen cadaveric thumbs from 9 specimens were used. Length, width, and thickness of the AOL and DRL were measured on magnetic resonance imaging and/or after dissection. Next, the first metacarpal and trapezium were isolated together with both ligaments, and both bones were cut sagittally to isolate a first metacarpal-AOL-trapezium and first metacarpal-DRL-trapezium complex from each thumb. These samples were subjected to cyclic loading in displacement-controlled tests. The obtained force-displacement curves were used to calculate stiffness and hysteresis of each sample.

RESULTS

Our results showed that the DRL is significantly shorter and thicker than the AOL, which is thin and ill-defined. Our results also indicate that the DRL has a higher stiffness than the AOL, making it a more likely candidate to provide joint stability.

CONCLUSIONS

Although the AOL has been asserted to be the primary restraint to dorsoradial subluxation, this view has been challenged over the past 10 years by several studies. These studies have shown the AOL to be relatively weak and compliant compared with the intermetacarpal and dorsoradial ligaments and have demonstrated that the DRL is the strongest and stiffest ligament of the TMC joint. Our studies confirm these findings.

CLINICAL RELEVANCE

This study indicates that the DRL is relatively stiff and thick, suggesting it should be repaired or reconstructed when disrupted to restore stability of the TMC joint.

Functional task kinematics of the thumb carpometacarpal joint

BACKGROUND

Abnormal biomechanical loading has been identified as an associated risk factor of osteoarthritis in the wrist and hand. Empirical data to date are insufficient to describe the role of altered biomechanics in thumb carpometacarpal (CMC) arthritis.

QUESTIONS/PURPOSES

This is a pilot study to evaluate motion analysis of the upper extremity while performing functional tasks. We wished to describe the in vivo kinematics of the thumb and hand in relation to the larger joints of the upper extremity in subjects without arthritis in functional positions at rest and while loading the CMC joint. If reproducible, we then planned to compare kinematics between these subjects and a subject with advanced thumb CMC arthritis.

METHODS

In vivo kinematics of the hand and upper extremity during the functional tasks of grasp, jar opening, and pinch with and without loading of the CMC joint were evaluated using cameras and a motion-capture system in four asymptomatic female subjects and one female subject with advanced radiographic (Eaton Stage IV) osteoarthritis.

RESULTS

Kinematics of the hand and upper extremity can be reliably quantified. Loading of the CMC joint did not alter the hand and forearm kinematics in control subjects. In the subject with osteoarthritis, the adduction-extension deformity at the CMC joint resulted in kinematic alterations as compared with the four control subjects.

CONCLUSIONS

This study represents preliminary steps in defining thumb CMC position, motion, and loading associated with activities of daily living. These findings enhance our understanding of motion at the CMC joint and how it differs in arthritic patients.

LEVEL OF EVIDENCE

Level II, prognostic study. See Guidelines for Authors for a complete description of levels of evidence.

Management of trapeziometacarpal osteoarthritis pain and dysfunction using mobilization with movement technique in combination with kinesiology tape: a case report

OBJECTIVE

The purpose of this report is to describe the management of a patient with advanced trapeziometacarpal (TMC) osteoarthritis (OA) using mobilization with movement technique in combination with kinesiology tape to decrease pain and improve range of motion.

CLINICAL FEATURES

A 52-year-old female seamstress (a career of 35 years' duration) presented to a physiotherapy clinic with pain in the dorsal aspect of the thumb carpometacarpal region of the right (dominant) hand. Examination revealed reduced ability to abduct the right thumb, significant loss of web space, weakness of pinch grip, and deterioration of hand function. Radiographs demonstrated OA of the TMC stage IV according to the Eaton-Littler-Burton classification, with instability and subluxation of the joint.

INTERVENTION AND OUTCOME

A combined treatment protocol of mobilization with movement and kinesiology tape at the TMC joint for 12 weekly sessions was performed. Outcome measures were assessed at baseline, immediately upon completion of treatment, and at 2-month follow-up and included numeric pain rating scale, range of motion, pressure pain threshold, and tip pinch strength at the TMC joint. Treatment interventions were applied for 12 sessions over a period of 2 months. Outcome measures indicated significant reduction of the patient's subjective pain reports and considerable improvement in functional and occupational tasks. A follow-up visit at 4 months (2 months after last treatment) showed that the improvement was maintained.

CONCLUSION

A combined program of mobilization with movement and kinesiology tape reduced pain, increased range of motion, and increased tip pinch strength in a patient with severe functional impairment related to dominant TMC OA.

Effects of a dynamic stability approach in conservative intervention of the carpometacarpal joint of the thumb: a retrospective study

STUDY DESIGN

Retrospective cohort.

INTRODUCTION

Conservative intervention of carpometacarpal joint (CMC) thumb pain, caused by osteoarthritis and ligament laxity, is frequently seen in hand therapy. Traditional intervention for pain and disability reduction includes orthoses, exercises, and joint protection education. The literature on conservative management is unclear which design or program of exercises create an effective result. Results of a conservative dynamic stability interventional model for thumb pain are presented as a design which positively effects pain and disability.

PURPOSE OF THE STUDY

The purposes were to primarily investigate change in pain and disability in persons with CMC pain in a dynamic stability modeled approach to intervention, and secondarily, to assess the average number of visits and the duration of total visits in this model.

METHODS

A retrospective chart review was completed on 35 charts of those seen at a multicenter hand therapy clinic. The pain and disability scores from the QuickDASH were used as outcome measures.

RESULTS

The average group pain and disability scores improved by 17.9% (p < .01) and 19.3% (p < .01) respectively, with average individual disability improvement of 15.7%, which is greater than the accepted MCID. The average patient visits were 2.37 over an average range of 44.5 days. The group demographics match current literature: 31 females to 4 males, with average age of 58 years (range of 30-82 years).

CONCLUSION

Significant reduction in pain and disability is noted with a conservative dynamic stability modeled approach to intervention, with information on average visits and duration in this model of care for individuals with thumb pain at the CMC joint.

LEVEL OF EVIDENCE

4.

Suture-button suspensionplasty for thumb carpometacarpal arthritis: a minimum 2-year follow-up

PURPOSE

To retrospectively review the results at a minimum of 2 years of suture-button plasty with partial or full trapeziectomy and suture-button suspensionplasty.

METHODS

We evaluated 21 patients who received suture-button suspensionplasty at least 2 years after surgery. We measured postoperative pinch strength, grip strength, range of motion, and metacarpal height. All patients also completed the Quick Disabilities of the Arm, Shoulder, and Hand questionnaire.

RESULTS

At an average follow-up of 2.8 ± 0.7 years, the mean Quick Disabilities of the Arm, Shoulder, and Hand score was 10 ± 9. Pinch and grip strengths were 86% and 89% of the contralateral limb, respectively. Average first trapezial height was 74% of the contralateral trapezial height. There were no major complications.

CONCLUSIONS

The favorable results of the suture-button suspensionplasty procedure confirm its usefulness in treating thumb carpometacarpal arthritis with minimal risk of complications, ineffective fixation, or loss of function. Subjective and objective outcomes measures are similar to previously described techniques. The benefit of this technique results from the implanted nature of the suspensionplasty elements that require no time to heal, so rehabilitation is begun as early as 10 days postoperatively.

TYPE OF STUDY/LEVEL OF EVIDENCE

Therapeutic IV.

Suture button suspension following trapeziectomy in a cadaver model

BACKGROUND

The safety and the effects of different trajectories on thumb motion of suture-button suspensionplasty post-trapeziectomy are not known.

METHODS

In a cadaveric model, thumb range of motion, trapeziectomy space height, and distance between the device and nerve to the first dorsal interosseous muscle (first DI) were measured for proximal and distal trajectory groups. Proximal trajectory was defined as a suture button angle directed from the thumb metacarpal to the second metacarpal at a trajectory less than 60° from the horizontal; distal trajectory was defined as a suture button angle directed from the thumb metacarpal to the second metacarpal at a trajectory of greater than 60° from the horizontal (Fig. 1).

RESULTS

There were no significant differences in range of motion and trapeziectomy space height between both groups. The device was significantly further away from the nerve to the first DI in the proximal trajectory group compared to the distal trajectory group, but was still safely away from the nerve in both groups (greater than 1 cm).

CONCLUSIONS

These results suggest that the device placement in either a proximal or distal location on the second metacarpal will yield similar results regarding safety and thumb range of motion.

Arthroscopic-assisted arthrodesis of the trapeziometacarpal joint

Arthroscopic-assisted surgery of the trapeziometacarpal (TMC) joint has been described before for the treatment of TMC joint arthritis including, debridement, partial or total trapezectomy, and interpositional arthroplasty, but its use for fusion is not reported. TMC joint arthroscopy is a novel technique for arthrodesis which aims to maintain joint stability and strength. We have successfully used this technique to perform fusion of the TMC joint. We think that this would offer the possibility of expanding the indications for TMC joint arthroscopy.

The influence of evidence in the surgical treatment of thumb basilar joint arthritis

BACKGROUND

For surgical treatment of thumb carpometacarpal joint arthritis, current evidence suggests that simple trapeziectomy is as effective as and may be safer than trapeziectomy and ligament reconstruction with or without tendon interposition. The authors examined whether current practice patterns in the surgical treatment of thumb carpometacarpal joint arthritis reflect adoption of simple trapeziectomy as best practice, and investigated whether surgeon preferences and third-party payer patterns are associated with use of simple trapeziectomy.

METHODS

The authors performed a retrospective cross-sectional study of 6776 surgical treatments for thumb carpometacarpal joint arthritis using the all-payer State Ambulatory Surgery Database for Florida, from 2006 to 2009. Multinomial regression analysis was applied to examine associations between covariates, describing surgeon and third-party payer factors and type of procedure performed. An intraclass correlation coefficient was calculated to determine how much of the difference in patient outcome (procedure type) is attributable to differences between surgeons.

RESULTS

Across surgeon characteristics included in the analysis, patients' outcome probabilities were over 90 percent in favor of treatment with trapeziectomy and ligament reconstruction with or without tendon interposition. The level of intraclass correlation among patients clustered within a surgeon showed that individual surgeons contribute substantially to determining what procedure type a patient undergoes.

CONCLUSIONS

In this multiyear, one-state study, current evidence demonstrating the equivalent effectiveness of simple trapeziectomy compared with more involved alternatives did not result in wide adoption of the technique. This finding is consistent with studies in many clinical disciplines that highlight the difficulty of influencing clinical practice with available evidence.

A closer look at hand and wrist complaints

Hand or wrist pain is a common complaint in primary care. This pain can be very disabling and can significantly impair a person's quality of life. With the appropriate clinical knowledge and skills, nurse practitioners can effectively evaluate, diagnose, and treat many of the common hand and wrist complaints seen in primary care.

Rehabilitation following thumb CMC, radiocarpal, and DRUJ arthroplasty

Hand therapy is essential after arthroplasty around the wrist. This article includes therapy guidelines and goals after surgical reconstruction of the thumb carpometacarpal joint, radiocarpal joint, and distal radioulnar joint. Typical concerns and treatment options are addressed. Tables and figures are included to guide the hand therapist in the process of returning this patient population to pain-free function.

Trapezium trabecular morphology in carpometacarpal arthritis

PURPOSE

In thumb carpometacarpal osteoarthritis, current evidence suggests that degenerative, bony remodeling primarily occurs within the trapezium. Nevertheless, the pathomechanics involved and the most common sites of wear remain controversial. Quantifying structural bone morphology characteristics with high-resolution computed tomography CT (micro-CT) infer regions of load transmission. Using micro-CT, we investigated whether predominant trabecular patterns exist in arthritic versus normal trapeziums.

METHODS

We performed micro-CT analysis on 13 normal cadaveric trapeziums and 16 Eaton stage III to IV trapeziums. We computationally divided each specimen into 4 quadrants: volar-ulnar, volar-radial, dorsal-radial, and dorsal-ulnar. Measurements of trabecular bone morphologic parameters included bone volume ratio, connectivity, trabecular number, and trabecular thickness. Using analysis of variance with post hoc Bonferroni/Dunn correction, we compared osteoarthritic and normal specimen quadrant measurements.

RESULTS

No significant difference existed in bone volume fraction between the osteoarthritic and normal specimens. Osteoarthritic trapeziums, however, demonstrated significantly higher trabecular number and connectivity than nonosteoarthritic trapeziums. Comparing the volar-ulnar quadrant of osteoarthritis and normal specimens collectively, this quadrant in both consistently possessed significantly higher bone volume fraction, trabecular number, and connectivity than the dorsal-radial and volar-radial quadrants.

CONCLUSIONS

The significantly greater trabecular bone volume, thickness, and connectivity in the volar-ulnar quadrant compared with the dorsal-radial and dorsal-ulnar quadrants provides evidence that the greatest compressive loads at the first carpometacarpal joint occur at the volar-ulnar quadrant of the trapezium, representing a consistently affected region of wear in both normal and arthritic states.

CLINICAL RELEVANCE

These findings suggest that trapezial trabecular morphology undergoes pathologic alteration. This provides indirect evidence that changes in load transmission occur with thumb carpometacarpal joint arthritis development.

An exercise program for carpometacarpal osteoarthritis based on biomechanical principles

A review of the literature was performed to design a hand exercise regimen based on biomechanical principles of the carpometacarpal (CMC) joint and the forces that act upon the joint. Sixteen biomechanical studies were included in the review: four studies developed a mathematical model of the thumb and 12 performed cadaveric dissections to study the CMC joint. Clinical application of the biomechanical findings from the studies was synthesized into specific recommendations for a hand exercise program to preserve CMC joint range of motion and increase the strength of the stabilizing muscles of the thumb. The exercise regimen was developed in accordance with recommendations of the American College of Sports Medicine guidelines for the development of individualized exercise prescriptions.

LEVEL OF EVIDENCE

4.

Radiologic guide to surgical treatment of first carpometacarpal joint osteoarthritis

OBJECTIVE

The purpose of this article is to provide a radiologic guide to surgical treatment of first carpometacarpal osteoarthritis, a common problem especially in older women.

CONCLUSION

Knowledge of the indications, surgical technique, component design, normal postoperative imaging assessment, and imaging findings of complications is important to providing a meaningful radiologic evaluation of patients after first carpometacarpal joint surgeries, including arthroplasty and arthrodesis.