Evaluation of the validity of the AOFAS Clinical Rating Systems by correlation to the SF-36

Validity, reliability, and responsiveness of the Self-reported Foot and Ankle Score (SEFAS) in forefoot, hindfoot, and ankle disorders

BACKGROUND AND PURPOSE

The self-reported foot and ankle score (SEFAS) is a questionnaire designed to evaluate disorders of the foot and ankle, but it is only validated for arthritis in the ankle. We validated SEFAS in patients with forefoot, midfoot, hindfoot, and ankle disorders.

PATIENTS AND METHODS

118 patients with forefoot disorders and 106 patients with hindfoot or ankle disorders completed the SEFAS, the foot and ankle outcome score (FAOS), SF-36, and EQ-5D before surgery. We evaluated construct validity for SEFAS versus FAOS, SF-36, and EQ-5D; floor and ceiling effects; test-retest reliability (ICC); internal consistency; and agreement. Responsiveness was evaluated by effect size (ES) and standardized response mean (SRM) 6 months after surgery. The analyses were done separately in patients with forefoot disorders and hindfoot/ankle disorders.

RESULTS

Comparing SEFAS to the other scores, convergent validity (when correlating foot-specific questions) and divergent validity (when correlating foot-specific and general questions) were confirmed. SEFAS had no floor and ceiling effects. In patients with forefoot disorders, ICC was 0.92 (CI: 0.85-0.96), Cronbach's α was 0.84, ES was 1.29, and SRM was 1.27. In patients with hindfoot or ankle disorders, ICC was 0.93 (CI: 0.88-0.96), Cronbach's α was 0.86, ES was 1.05, and SRM was 0.99.

INTERPRETATION

SEFAS has acceptable validity, reliability, and responsiveness in patients with various forefoot, hindfoot, and ankle disorders. SEFAS is therefore an appropriate patient- reported outcome measure (PROM) for these patients, even in national registries.

The use of a syndesmosis procedure for the treatment of hallux valgus

Metatarsus primus varus deformity correction is one of the main objectives in hallux valgus surgery. A ‘syndesmosis’ procedure may be used to correct hallux valgus. An osteotomy is not involved. The aim is to realign the first metatarsal using soft tissues and a cerclage wire around the necks of the first and second metatarsals.

We have retrospectively assessed 27 patients (54 feet) using the American Orthopaedic Foot and Ankle Society (AOFAS) score, radiographs and measurements of the plantar pressures after bilateral syndesmosis procedures. There were 26 women. The mean age of the patients was 46 years (18 to 70) and the mean follow-up was 26.4 months (24 to 33.4). Matched-pair comparisons of the AOFAS scores, the radiological parameters and the plantar pressure measurements were conducted pre- and post-operatively, with the mean of the left and right feet. The mean AOFAS score improved from 62.8 to 94.4 points (p < 0.001). Significant differences were found on all radiological parameters (p < 0.001). The mean hallux valgus and first intermetatarsal angles were reduced from 33.2° (24.3° to 49.8°) to 19.1° (10.1° to 45.3°) (p < 0.001) and from 15.0° (10.2° to 18.6°) to 7.2° (4.2° to 11.4°) (p < 0.001) respectively. The mean medial sesamoid position changed from 6.3(4.5 to 7) to 3.6 (2 to 7) (p < 0.001) according to the Hardy’s scale (0 to 7). The mean maximum force and the force–time integral under the hallux region were significantly increased by 71.1% (p = 0.001), (20.57 (0.08 to 58.3) to 35.20 (6.63 to 67.48)) and 73.4% (p = 0.014), (4.44 (0.00 to 22.74) to 7.70 (1.28 to 19.23)) respectively. The occurrence of the maximum force under the hallux region was delayed by 11% (p = 0.02), (87.3% stance (36.3% to 100%) to 96.8% stance (93.0% to 100%)). The force data reflected the restoration of the function of the hallux. Three patients suffered a stress fracture of the neck of the second metatarsal. The short-term results of this surgical procedure for the treatment of hallux valgus are satisfactory.

Cite this article: Bone Joint J 2014;96-B:502–7.

Lengthening scarf osteotomy for recurrent hallux valgus

BACKGROUND

We describe using the scarf osteotomy to correct a recurrent hallux valgus deformity and lengthen the shortened first metatarsal in symptomatic iatrogenic first brachymetatarsia.

METHODS

Thirty-six lengthening scarf osteotomies were undertaken in 31 patients. Clinical and radiographic measures were taken pre and postoperatively.

RESULTS

Mean age at presentation was 53.4 years, and mean followup 3.9 years. The mean lengthening achieved was 4.9mm. All osteotomies united with no complications. The mean IMA reduction was 4.0° (p<0.001) and HVA 13.0° (p<0.001). The mean AOFAS score increase was 33.8 (p<0.001). There was a positive trend but no correlation (r=0.28) between amount of metatarsal lengthening and AOFAS score change.

CONCLUSIONS

We describe the largest lengthening scarf osteotomy series for recurrent hallux valgus with iatrogenic first brachymetatarsia. The results suggest the procedure is successful, with a low complication rate. We anticipate that restoring first metatarsal length and alignment may reduce biomechanical transfer metatarsalgia over time.

Consensus in chronic ankle instability: aetiology, assessment, surgical indications and place for arthroscopy

Ankle sprains are the most common injuries sustained during sports activities. Most ankle sprains recover fully with non-operative treatment but 20-30% develop chronic ankle instability. Predicting which patients who sustain an ankle sprain will develop instability is difficult. This paper summarises a consensus on identifying which patients may require surgery, the optimal surgical intervention along with treatment of concomitant pathology given the evidence available today. It also discusses the role of arthroscopic treatment and the anatomical basis for individual procedures.

Functional results and complication analysis after total ankle replacement: early to medium-term results from a Portuguese and Spanish prospective multicentric study

BACKGROUND

Ankle arthroplasty is increasingly being used to treat end-stage ankle osteoarthritis.

METHODS

Between January 2005 and January 2011, 159 patients have been included in an ongoing prospective multicentric study analysing the results of total ankle arthroplasty in Portugal and Spain. 119 patients (119 replacements) were available for review and were evaluated for range of motion (ROM), clinical status (American Orthopaedic Foot & Ankle Society (AOFAS) ankle-hindfoot score), complications and survivorship rate.

RESULTS

Mean follow-up was 39 months. A total of 17 complications were reported, with 7 leading to subsequent surgery (94.1% survivorship rate). Of these, there were two infections (98.3% survivorship rate), two painful subtalar arthritis, one instability, one malalignment and one tibial bone cyst. Complications not requiring further surgery were 6 intra-operative malleolar fractures and 4 cases of skin necrosis.

CONCLUSIONS

Adequate patient selection and a thorough knowledge of the surgical technique are mandatory to reduce the number of complications and increase ankle arthroplasty survivorship.

Total ankle replacement in patients under the age of 50. Should the indications be revised?

BACKGROUND

High physical demand and young age are currently considered contraindications for total ankle replacement. This study aimed to compare its results between patients under the age of 50 and those aged 50 or older.

METHODS

103 patients derived from an ongoing prospective multicentric study with a mean follow-up of 41 (range, 24-72) months were included in this study. Clinical status (AOFAS score), range of motion (ROM), complication and survivorship rates were compared between <50 and ≥50 patients.

RESULTS

ROM and AOFAS score were significantly higher, as were their increases relatively to pre-operative values in patients <50. Complication and survivorship rates were comparable between both groups.

CONCLUSIONS

At medium-term, ankle replacement is at least as effective in patients under the age of 50 as in those with aged 50 or older. Long-term results will allow to assess whether surgical indications for should be revised.

Is there a relation between AOFAS ankle-hindfoot score and SF-36 in evaluation of Achilles ruptures treated by percutaneous technique?

The percutaneous technique of Achilles tendon repair seems to offer satisfactory clinical and functional results, although these results have been evaluated mainly using objective rating scales. Recently, some "subjective" rating scales have been combined to evaluate the results of various surgical treatments. The purpose of the present study was to compare the results of a percutaneous Achilles tendon repair evaluated objectively using the American Orthopaedic Foot and Ankle Society (AOFAS) ankle-hindfoot score and subjectively using the Medical Outcomes Study, short-form, 36-item questionnaire (SF-36) questionnaire. A total of 17 consecutive patients were treated for acute Achilles tendon rupture using the modified percutaneous Ma and Griffith technique. We reviewed all patients with a follow-up of 24 to 64 months (mean 45.5). At the final follow-up visit, the AOFAS ankle-hindfoot score of each patient was compared with each 1 of the 8 domains of the SF-36 questionnaire, using the parametric Pearson correlation coefficient and the equivalent nonparametric Spearman rho correlation coefficient. The relation between the objective (AOFAS) and subjective (SF-36) results showed a significant correlation (Pearson's correlation coefficient) between the physical functioning (r = 0.597, p = .011) and bodily pain (r = 0.663, p = .004) SF-36 domains, and a nonstatistically significant correlation with the other SF-36 domains. Very similar results were found using the nonparametric Spearman rho correlation coefficient. These results suggest that regarding pain and function, the AOFAS ankle-hindfoot score and SF-36 provide complementary information; therefore, we believe that the SF-36 questionnaire should be used with the AOFAS ankle-hindfoot score for a more complete evaluation of the outcome.

Validation of PROMIS ® Physical Function computerized adaptive tests for orthopaedic foot and ankle outcome research

BACKGROUND

In 2012, the American Orthopaedic Foot & Ankle Society(®) established a national network for collecting and sharing data on treatment outcomes and improving patient care. One of the network's initiatives is to explore the use of computerized adaptive tests (CATs) for patient-level outcome reporting.

QUESTIONS/PURPOSES

We determined whether the CAT from the NIH Patient Reported Outcome Measurement Information System(®) (PROMIS(®)) Physical Function (PF) item bank provides efficient, reliable, valid, precise, and adequately covered point estimates of patients' physical function.

METHODS

After informed consent, 288 patients with a mean age of 51 years (range, 18-81 years) undergoing surgery for common foot and ankle problems completed a web-based questionnaire. Efficiency was determined by time for test administration. Reliability was assessed with person and item reliability estimates. Validity evaluation included content validity from expert review and construct validity measured against the PROMIS(®) Pain CAT and patient responses based on tradeoff perceptions. Precision was assessed by standard error of measurement (SEM) across patients' physical function levels. Instrument coverage was based on a person-item map.

RESULTS

Average time of test administration was 47 seconds. Reliability was 0.96 for person and 0.99 for item. Construct validity against the Pain CAT had an r value of -0.657 (p < 0.001). Precision had an SEM of less than 3.3 (equivalent to a Cronbach's alpha of ≥ 0.90) across a broad range of function. Concerning coverage, the ceiling effect was 0.32% and there was no floor effect.

CONCLUSIONS

The PROMIS(®) PF CAT appears to be an excellent method for measuring outcomes for patients with foot and ankle surgery. Further validation of the PROMIS(®) item banks may ultimately provide a valid and reliable tool for measuring patient-reported outcomes after injuries and treatment.

A systematic review of intermediate-term outcomes and failure rates for total ankle replacements: an Asian perspective

BACKGROUND

There are few records for total ankle replacement (TAR) in Asia. We aimed to report the cumulative intermediate-term outcomes in terms of clinical scores, survivorship and failure rates for patients managed with TAR in Asia.

METHODS

We conducted a systematic search for relevant articles published in English and other languages between January 1990 and February 2012. The study published before 1990 and used outdated prosthesis designs implanted before the early 1980s was excluded. Eligible studies were evaluated using the Coleman Methodology Score and data collection was independently performed by three reviewers.

RESULTS

Seven studies qualified for analysis, describing 321 implants (112 HINTEGRA(®), 104 TNK, 35 STAR, 13 ND-Bioceram, 57 un-reported implants). Overall studies showed the improvement of clinical scores following TAR. Pooled data for the survivorship analysis ranged from 100% at 3.2 years to 77% at 14.1 years. Pooled mean failure rate was 4.9±3.2% over a mean follow-up of 5.2±1.7 years.

CONCLUSIONS

TAR prostheses currently used in Asia achieved satisfactory intermediate-term outcomes in terms of clinical scores, survivorship and failure rates.

Validation of the Foot and Ankle Outcome Score in adult acquired flatfoot deformity

INTRODUCTION

The American Orthopaedic Foot and Ankle Society (AOFAS) Ankle-Hindfoot Score has been under recent scrutiny. The Foot and Ankle Outcome Score (FAOS) is an alternative subjective survey, assessing outcomes in 5 subscales. It is validated for lateral ankle instability and hallux valgus patients. The aim of our study was to validate the FAOS for assessing outcomes in flexible adult acquired flatfoot deformity (AAFD).

METHODS

Patients from the authors' institution diagnosed with flexible AAFD from 2006 to 2011 were eligible for the study. In all, 126 patients who completed the FAOS and the Short-Form 12 (SF-12) on the same visit were included in the construct validity component. Correlation was deemed moderate if the Spearman's correlation coefficient was .4 to .7. Content validity was assessed in 63 patients by a questionnaire that asked patients to rate the relevance of each FAOS question, with a score of 2 or greater considered acceptable. Reliability was measured using intraclass correlation coefficients (ICCs) in 41 patients who completed a second FAOS survey. In 49 patients, preoperative and postoperative FAOS scores were compared to determine responsiveness.

RESULTS

All of the FAOS subscales demonstrated moderate correlation with 2 physical health related SF-12 domains. Mental health related domains showed poor correlation. Content validity was high for the Quality of Life (QoL; mean 2.26) and Sports/Recreation subscales (mean 2.12). All subscales exhibited very good test-retest reliability, with ICCs of .7 and above. Symptoms, QoL, pain, and daily activities (ADLs) were responsive to change in postoperative patients (P < .05).

CONCLUSION

This study has validated the FAOS for AAFD with acceptable construct and content validity, reliability, and responsiveness. Given its previous validation for patients with ankle instability and hallux valgus, the additional findings in this study support its use as an alternative to less reliable outcome surveys.

LEVEL OF EVIDENCE

Level II, prospective comparative study.

Critical evaluation of outcome scales assessment of lateral ankle ligament reconstruction

BACKGROUND

Outcome following foot and ankle surgery can be assessed by disease- and region-specific scores. Many scoring systems exist, making comparison among studies difficult. The present study focused on outcome measures for a common foot and ankle abnormality and compared the results obtained by 2 disease-specific and 2 body region-specific scores.

METHODS

We reviewed 41 patients who underwent lateral ankle ligament reconstruction. Four outcome scales were administered simultaneously: the Cumberland Ankle Instability Tool (CAIT) and the Chronic Ankle Instability Scale (CAIS), which are disease specific, and the American Orthopedic Foot & Ankle Society (AOFAS) hindfoot scale and the Foot and Ankle Ability Measure (FAAM), which are both body region-specific. The degree of correlation between scores was assessed by Pearson's correlation coefficient. Nonparametric tests, the Kruskal-Wallis and the Mann-Whitney test for pairwise comparison of the scores, were performed.

RESULTS

A significant difference (P < .005) was observed between the CAIS and the AOFAS score (P = .0002), between the CAIS and the FAAM 1 (P = .0001), and between the CAIT and the AOFAS score (P = .0003).

CONCLUSIONS

This study compared the performances of 4 disease- and body region-specific scoring systems. We demonstrated a correlation between the 4 administered scoring systems and notable differences between the results given by each of them. Disease-specific scores appeared more accurate than body region-specific scores. A strong correlation between the AOFAS score and the other scales was observed. The FAAM seemed a good compromise because it offered the possibility to evaluate the patient according to his or her own functional demand.

CLINICAL RELEVANCE

The present study contributes to the development of more critical and accurate outcome assesment methods in foot and ankle surgery.

Critical three-dimensional factors affecting outcome in osteochondral lesion of the talus

PURPOSE

This study aimed to investigate the relationship between clinical outcomes, patient demographics and the 3D-geometric profiles of the osteochondral lesion of the talus (OLT) following arthroscopic debridement and bone marrow stimulation.

METHODS

Between 2005 and 2011, arthroscopic debridement and bone marrow stimulation were performed on 50 ankles with OLT mean age of 36.0 (19.1) years and mean follow-up time of 35.5 (20.2) months. Clinical data were assessed using validated Japanese Society of Surgery of the Foot scoring. An outcome was deemed unsatisfactory if the JSSF score was less than 80. Magnetic resonance imaging and X-rays were used to assess the 3D-geometric profiles of the OLT.

RESULTS

The mean preoperative and postoperative scores were 73.4 (13.6) and 89.6 (11.5), respectively (p < 0.001). Unsatisfactory outcomes were identified in 12 % of patients. Linear regression analyses showed that lesion depth and patient age were significantly negatively correlated with postoperative scores (p < 0.001). High prognostic significances were attributed to defect depth and age of patient, and cut-off values of 7.8 mm and 80 years, respectively, were recommended to avoid a postoperative score less than 80. No significant correlations between poor clinical outcome and the other lesion profiles or demographic factors were identified.

CONCLUSION

Using 3D-geometric and demographic profiles, defect depth and age of patient are essential prognostic factors in OLT and may act as a basis for preoperative surgical decisions. A lesion depth ≥ 7.8 mm and age ≥ 80 years predict an unsatisfactory outcome following arthroscopic debridement and bone marrow stimulation.

Reliability, validity and responsiveness of the Italian version of the Foot Function Index in patients with foot and ankle diseases

PURPOSE

The purpose of this study was to translate the Foot Function Index (FFI) into Italian, to perform a cross-cultural adaptation and to evaluate the psychometric properties of the Italian version of FFI.

METHODS

The Italian FFI was developed according to the recommended forward/backward translation protocol and evaluated in patients with foot and ankle diseases. Feasibility, reliability [intraclass correlation coefficient (ICC)], internal consistency [Cronbach's alpha (CA)], construct validity (correlation with the SF-36 and a visual analogue scale (VAS) assessing for pain), responsiveness to surgery were assessed. The standardized effect size and standardized response mean were also evaluated.

RESULTS

A total of 89 patients were recruited (mean age 51.8 ± 13.9 years, range 21-83). The Italian version of the FFI consisted in 18 items separated into a pain and disability subscales. CA value was 0.95 for both the subscales. The reproducibility was good with an ICC of 0.94 and 0.91 for pain and disability subscales, respectively. A strong correlation was found between the FFI and the scales of the SF-36 and the VAS with related content, particularly in the areas of physical function and pain was observed indicating good construct validity. After surgery, the mean FFI improved from 55.9 ± 24.8 to 32.4 ± 26.3 for the pain subscale and from 48.8 ± 28.8 to 24.9 ± 23.7 for the disability subscale (P < 0.01).

CONCLUSIONS

The Italian version of the FFI showed satisfactory psychometric properties in Italian patients with foot and ankle diseases. Further testing in different and larger samples is required in order to ensure the validity and reliability of this score.

Outcome after metatarsal osteotomy for hallux valgus: a study of postoperative foot function using revised foot function index short form

The aim of the present study was to evaluate patients' perception of their functional outcome at 6 and 12 months after surgical correction for hallux valgus using the Foot Function Index Revised short form. A total of 59 patients underwent 68 osseous and soft tissue procedures for the correction of hallux valgus deformity from January 2009 through December 2010. The outcome analysis was based on the validated patient questionnaire, the Foot Function Index Revised. The preoperative data were collected on the day of the patient's surgery using the Foot Function Index Revised short-form questionnaire. The postoperative data were collected at 6 and 12 months after the patient's initial surgical date using the same validated questionnaire. The cumulative Foot Function Index Revised score and the scores in each subscale demonstrated statistically significant data at both 6 and 12 months of follow-up. On average, the Foot Function Index Revised scores had improved by 39% at 6 months and 50% at 12 months. The improvement in all scores indicated an improvement in health-related foot function after hallux valgus surgery, evidencing effective surgical intervention. Expectations are the best predictors of patient satisfaction, and the present study has provided statistically significant data to allow physicians to establish realistic outcomes after surgical correction for hallux valgus deformity.

Prospective study of the treatment of adult primary hallux valgus with scarf osteotomy and soft tissue realignment

BACKGROUND

The scarf osteotomy has been a widely practiced bunion operation, but relatively limited prospective data on its outcomes have been reported. The purpose of this investigation was to prospectively evaluate the clinical and radiographic results of treatment of adult primary hallux valgus using the scarf osteotomy of the first metatarsal with soft tissue realignment.

METHODS

Hallux valgus corrections were performed on 51 patients (53 feet), who were followed for at least 1 year with an average follow-up of 24 months. Mean age at the time of surgery was 59 years, and subjects included 3 male and 48 female patients. Prospective clinical data collected included the American Orthopaedic Foot & Ankle Society (AOFAS) hallux-interphalangeal scale score, the SF-36 scores, and the visual analogue scale (VAS) for pain. Data were collected preoperatively and postoperatively. Prospective radiologic data were also collected including hallux valgus angle (HVA), first-second intermetatarsal angle (IMA), and medial sesamoid position (MSP). Clinical data were collected on complications and reoperations.

RESULTS

Mean AOFAS hallux-interphalangeal score increased from 52 preoperatively to 88 postoperatively. Mean preoperative and last follow-up SF-36 physical component summary increased from 46 preoperatively to 52 postoperatively, whereas mean VAS pain scores decreased from 5.8 preoperatively to 1.1 postoperatively. All the changes in clinical outcomes were statistically significant, except the Mental Component Summary of the SF-36. Mean preoperative HVA decreased from 29 degrees preoperatively to 10.7 degrees in the initial postoperative period and was maintained at last follow-up at 10.6 degrees. The mean preoperative IMA decreased from 13.6 degrees preoperatively to 5.6 degrees in the initial postoperative period and regressed mildly at last follow-up to 7.8 degrees. The mean preoperative MSP grade of 2.3 decreased to 0.5 in the initial postoperative period and regressed mildly to 0.9 at last follow-up. All radiographic changes were statistically significant. The overall complication rate was 15% (8/53), attributable to 4 feet with symptomatic hardware, 2 feet with hallux varus, and 2 feet with progression of first MTP arthritis. Reoperations were performed in 4 feet (8%) for removal of symptomatic hardware.

CONCLUSION

Scarf osteotomy was a reliable technique for correction of moderate to severe hallux valgus and had low rates of complication or recurrence.

LEVEL OF EVIDENCE

Level IV, case series.

Metatarsal head resurfacing for advanced hallux rigidus

BACKGROUND

Advanced stages of first metatarsophalangeal (MTP) arthritis have traditionally been treated with various arthroplasties or arthrodesis. Studies suggest the outcomes of arthrodesis are superior to those of metallic joint replacement; however, complications and suboptimal outcomes in active patients still remain with arthrodesis of the first MTP joint. This study reports results of patients with advanced MTP arthritis who underwent metallic resurfacing of the metatarsal side of the MTP joint.

METHODS

From 2005 to 2006, 26 patients (30 implants) with stage II or III hallux rigidus underwent resurfacing with the HemiCAP® implant and consented to participate in a study comparing pre- and postoperative radiographs, range of motion (ROM), American Orthopedic Foot and Ankle Society, and Short Form 36 Health Survey (SF-36) scores. Average age of these patients was 51 years. Patients were assessed at a mean of 27 months with outcome measures and contacted at 60 months to assess current symptoms and satisfaction.

RESULTS

Assessment at 27 months demonstrated statistically significant improvements in ROM, AOFAS, and SF-36 scores (P < .05) when compared to baseline. Mean preoperative AOFAS scores improved from 51.5 to 94.1. Mean active ROM improved from 19.7 to 47.9 degrees. Mean passive ROM improved from 28.0 to 66.3 degrees. Mean RAND SF-36 physical component score improved significantly from 66.7 to 90.6. Average time for return to work was 7 days. At 60 months, all patients reported excellent satisfaction with their current state and would repeat the procedure. Implant survivorship was 87% at 5 years. Of the 30 implants, 4 were revised at 3 years.

CONCLUSION

The results at 5 years were very promising. Preservation of joint motion, alleviation of pain, and functional improvement data were very encouraging. Because minimal joint resection was performed, conversion to arthrodesis or other salvage procedures would be relatively simple if further intervention became necessary.

LEVEL OF EVIDENCE

Level IV, prospective case series.

Tibiotalocalcaneal arthrodesis in a Singaporean hospital

PURPOSE

To report 18 patients who underwent tibiotalocalcaneal arthrodesis using a retrograde intramedullary nail or cannulated screws.

METHODS

10 men and 8 women (19 ankles) aged 36 to 70 (mean, 52) years underwent tibiotalocalcaneal arthrodesis using a retrograde intramedullary nail (n=13) or cannulated screws (n=6). Indications for arthrodesis were severe cavovarus deformity secondary to polio or charcot-marie-tooth disease (n=7), severe osteoarthritis in the ankle and subtalar joints (n=6), Charcot joint deformity (n=3), failed fusion procedures (n=2), and foot drop secondary to T12 tumour surgery (n=1). The visual analogue score (VAS) for pain was assessed, as were the American Orthopaedic Foot and Ankle Society (AOFAS) scores (for subjective and objective pain, function, and stability of the ankle), short form 36 (SF-36), and patient expectation and satisfaction scores.

RESULTS

The mean follow-up period was 35.6 (range, 11-144) months. 13 of 18 patients returned for assessment of scores. 18 of the 19 ankles achieved fusion after a mean period of 5.9 (range, 3-11) months. The mean VAS scores for pain, AOFAS scores, and SF-36 scores all improved. 11 patients had good-to-excellent satisfaction and expectation scores. Two patients had severe wound infections and underwent implant removal (after bone union), debridement, and intravenous antibiotic therapy. Two other patients had superficial wound infections. One patient with retrograde intramedullary nailing had a pseudoarthrosis and underwent implant removal, redebridement, re-autografting, and cannulated screw fixation. Fusion was achieved subsequently.

CONCLUSION

Tibiotalocalcaneal arthrodesis improved the pain score and quality of life, despite a high risk of complications.

[Medial versus lateral plating in distal tibial fractures: a prospective study of 40 fractures]

OBJECTIVE

Tibial plafond fractures are one of the most challenging injuries in orthopaedic surgery. Their results could be improved by following the new guidelines for the management, and modern plating techniques. The results and complication rate between anteromedial and anterolateral approach for open reduction and internal fixation of these fractures were compared.

MATERIAL AND METHODS

A study was conducted on 40 patients treated by open reduction an internal fixation between 2007 and 2008. The surgical approach was selected by the surgeon in charge, depending on fracture pattern and skin situation. Patients were evaluated clinically and radiographically by an independent orthopaedic surgeon, not involved in the surgical procedure, using clinical (American Orthopaedic Foot and Ankle Society score) and radiological criteria at a minimum of two years. The appearance of complications after both approaches was recorded.

RESULTS

Forty patients were included. The mean age was 53 years, with 24 males and 16 females. Seventeen of the injuries were of high energy, and there were 8 open fractures (3 of type i, 4 type ii and one type iii), and 12 of the closed injuries were grade ii or iii in the Tscherne classification. Six patients (15%) had associated injuries. At final follow-up there were 33 (82%) excellent or good results. No statistical differences were found between either surgical approach regarding time to bone union, rate of delayed union and infection rate. Three plates of the anteromedial group and none of the anterolateral group needed to be removed.

CONCLUSION

Open reduction and internal fixation of distal tibia fractures produced reliable results, with no statistical differences found between anteromedial and anterolateral surgical approaches. Clinical and radiological results and complication rate were mainly related to the fracture type.

Results of dynamic pedobarography following surgically treated intra-articular calcaneal fractures

OBJECTIVE

To investigate the clinical outcome and gait analysis findings by dynamic pedobarography in patients following surgically treated single, closed, dislocated intra-articular calcaneal fractures.

DESIGN

Retrospective single-center study with 26 patients. The average follow-up period was 34 months (range 18-61 months). We used the Zwipp score and a score based on a visual analog scale (VAS) to assess the subjective and objective clinical outcome. Dynamic pedobarography (EMED-M, 38 × 42 cm, four sensors per square centimeter, 50 Hz; Novel GmbH., Munich, Germany) was performed to retrieve gait patterns. Analysis was performed using the Emed-Software (Novel GmbH., Munich, Germany).

RESULTS

For the Zwipp score (±200 points), the average was +54.4 points (±48.2); for the VAS score (0-100 points), the average was 58.3 points (±24.3). There was limited mobility in the upper and lower ankle joint. Pedobarography showed a clearly disturbed gait with increased pressure for the fractured side (157 vs. 119 kPa) in the midfoot region (71.8 vs. 68 kPa) and under fifth metatarsal bone (234 vs. 160 kPa). The gait line was lateralized. The force-time-integral (fractured vs. healthy side) showed significant differences for the medial (18 vs. 7 N s) and lateral (61 vs. 36 N s) midfoot region.

CONCLUSIONS

We found only an average clinical outcome and clear pathological gait patterns in our cohort with lateralization of the gait line.

The ability of outcome questionnaires to capture patient concerns following ankle reconstruction

BACKGROUND

The objective of this study was to compare questions from outcome questionnaires with items generated by preoperative and postoperative ankle reconstruction patients (using the open-ended questions of self-reported Patient-Specific Index [PASI]) to determine whether existing questionnaires address patients' concerns.

METHODS

Patients (n = 142) completed the PASI. Questions from 6 standardized questionnaires (American Academy of Orthopaedic Surgeons Foot and Ankle Questionnaire [AAOS], patient-reported portion of the American Orthopaedic Foot and Ankle Society Clinical Rating System Ankle-Hindfoot Scale [AOFAS], Foot Function Index [FFI], Lower Extremity Functional Scale [LEFS], Short Musculoskeletal Function Assessment [SMFA], Western Ontario and McMaster Universities Osteoarthritis Index [WOMAC]) and PASI were matched by 3 reviewers to corresponding categories in the International Classification of Functioning, Disability and Health (ICF). Standardized questionnaires were then compared with the patient responses produced by the PASI.

RESULTS

Patients identified 690 items corresponding to 45 ICF categories. Most PASI concepts fell into Activities and Participation (60.3%) and Body Functions (29.0%) components, including the categories "walking" (19.1%), "pain" (16.5%), and "recreation and leisure" (15.4%); 237 items were identified in questionnaires and linked to 39 ICF categories. Core issues in questionnaires ("pain," "walking," "stairs") were important concerns for patients, but other key patient concerns ("swelling," "recreation and leisure," "sports") were seldom included in questionnaires.

CONCLUSION

No single questionnaire captured all patient concerns, and standardized questionnaires differed largely in content. This analysis may help guide development of a more comprehensive instrument for evaluating outcomes following ankle reconstruction.

CLINICAL RELEVANCE

When choosing an outcome questionnaire, clinicians and researchers should consider the targeted outcome because no one questionnaire captures the full patient experience.

Validation of foot and ankle outcome score for hallux valgus

BACKGROUND

Patient-reported outcome questionnaires such as the Foot and Ankle Outcome Score (FAOS) are useful in evaluating results after orthopedic interventions. However, despite being frequently used in the literature, its validity has not been established for forefoot disorders. Our study aimed to validate the FAOS for use in assessing outcomes of hallux valgus surgery.

METHODS

From 2006 to 2009, 195 patients with nonarthritic hallux valgus were included in the construct validity portion of the study. Patients had a SF-36 and a FAOS completed. Forty additional patients, both preoperative and postoperative, were given questionnaires to assess the relevance of each of the FAOS questions as it pertained to their bunions. Patients were also given the FAOS 1 month after the first to assess FAOS reliability. Responsiveness of the FAOS was included with 40 patients who had both preoperative and postoperative FAOS scores.

RESULTS

Four out of five FAOS subscales demonstrated acceptable correlation with the SF-36. The FAOS symptoms subscale showed the least correlation with SF-36, demonstrating the foot-specific nature of the questions. Both preoperative and postoperative patients rated the FAOS quality of life questions as the most relevant. All five subscales achieved acceptable test-retest reliability. The FAOS sports and recreation subscale was the least responsive.

CONCLUSION

Patient-based assessments have become increasingly important in evaluating treatment effectiveness. This study has shown that the FAOS has acceptable construct validity, reliability, and responsiveness in hallux valgus patients and is a useful patient-based tool in assessing these patients.

Rating systems for evaluation of functional ankle instability: prospective evaluation in a cohort of patients treated with monopolar capacitive-coupled radiofrequency

Evaluation of patient outcomes should include the use of validated scoring systems to determine disease-specific outcomes. Many scoring systems are being used for disorders of the ankle joint. However, not all instruments are capable of detecting changes associated with functional ankle instability (FAI), since their focus is toward pathological entities with greater impact on individual's physical and mental well-being.

METHODS

In this prospective study, 6 instruments were used to evaluate outcomes associated with an intervention aimed at improving FAI. Twenty ankles that had been unsuccessfully treated for FAI were treated with a single session of noninvasive monopolar capacitive-coupled radiofrequency (mcRF) and followed prospectively.

RESULTS

Five out of 6 instruments failed to show changes that could be correlated with patients' outcomes. Only one instrument, the Cumberland Ankle Instability Tool (CAIT) demonstrated enough sensitivity and correlated well with meaningful clinical differences. Based on study's success criteria (proper function, no pain, no adverse events, and patient satisfaction), 78% of the ankles treated had successful outcomes whereas 87.5% evidenced significant improvement based on CAIT (P < .001). No adverse events were present during the study.

CONCLUSIONS

The study of FAI is hampered by the lack of disease-specific questionnaires, which oftentimes introduce ceiling or flooring effects. The CAIT was capable of detecting changes in patients' condition and response to the noninvasive mcRF procedure without evidencing ceiling or flooring effects. In this study, the CAIT was found to be reliable, valid, sensitive to changes of clinical importance, in addition to being short and practical to use.

The long-term patient focused outcomes of the Keller's arthroplasty for the treatment of hallux rigidus

BACKGROUND

The Keller arthroplasty has been used to treat painful conditions of the first MTP joint for over 100 years. More recently the procedure has fallen out of favour, due to a high incidence of transfer metatarsalgia and poor function of the first MTP joint post-operatively.

OBJECTIVE

This study sought to review the place for Keller arthroplasty in the management of hallux rigidus by considering outcomes from the patient's perspective.

METHODS

From 1997 to 2005, 104 patients (131 feet) underwent a Keller excisional arthroplasty for the treatment of hallux rigidus. All subjects were classed as grade III on the Hattrup and Johnson scale of joint classification and had a primary complaint of painful hallux rigidus. The American orthopaedic foot and ankle scale was applied pre-operatively and post-operatively. Thirty-two participants (42 feet) were available for a final review (6 male feet and 34 female feet). The range of follow up was 36-154 months with a mean average follow up of 92 months (7.6 years). The age range at the time of surgery was 42-78 years with a mean average age of 62 years at surgery and 69 years and eight months at review.

RESULTS

Seventy-six percent of participants were completely satisfied, 21.5% satisfied with reservations and 2.5% were dissatisfied. High levels of satisfaction were recorded for pain relief, activity levels and overall patient satisfaction. Ninety-five percent of participants reported their symptoms were improved at long-term follow up compared to pre operatively; however 9.5% of the group complained of transfer metatarsalgia. Nineteen percent of participants, all female, were not happy with the cosmetic appearance of their foot. The mean pre-operative AOFAS clinical rating scale scores was 38. At final follow up the mean score was 89.

CONCLUSION

The Keller excisional arthroplasty is a simple reliable procedure for the treatment of severe hallux rigidus. Furthermore, it is effective in achieving pain-free movement of the first MTP joint, but carries a risk of creating transfer metatarsalgia. For nearly 20% of participants post-operative cosmetic appearance was disappointing.

Distraction osteogenesis for complex foot deformities: U-osteotomy with external fixation

BACKGROUND

Certain complex foot deformities can be corrected surgically with a U-osteotomy. This osteotomy is indicated for patients with a uniform deformity of the entire foot relative to the tibia, preexisting stiffness and/or fusion of the subtalar joint, and a pain-free ankle joint. The goal is to create a plantigrade foot through gradual osseous repositioning of the entire foot relative to the tibia by means of external fixation. If needed, foot height can be increased simultaneously.

METHODS

Fifteen complex multiplanar foot deformities in fifteen patients were treated with a U-osteotomy and gradual correction by means of external fixation. Deformities resulted from congenital causes (seven), trauma (three), and developmental causes (five). The mean patient age at the time of surgery was twenty years (range, four to sixty-three years). The mean duration of external fixation was five months (range, three to eleven months). The mean duration of follow-up was five years (range, three to nineteen years). Clinical and radiographic results were assessed.

RESULTS

Osseous union and a plantigrade foot were achieved in all fifteen patients. Seven complications related to the U-osteotomy occurred in four patients, including deep pin-track infection in two, premature osseous consolidation in two, postoperative tarsal tunnel syndrome in two, and peroneal nerve entrapment in one. When comparing the preoperative and final postoperative radiographs, three significant differences were observed: the calcaneotibial angle changed by a mean of 18° valgus (range, 6° to 40° valgus) (p = 0.003), the calcaneus was translated posteriorly by a mean of -8 mm (range, -2 to -20 mm) (p = 0.001), and foot height increased by a mean of 20 mm (range, 3 to 40 mm) (p < 0.001). Fourteen patients were able to walk without supports or assistance; one used only one cane or crutch to walk.

CONCLUSIONS

U-osteotomy with gradual correction by means of external fixation can be used to obtain a plantigrade foot in patients with complex multiplanar deformities of the foot relative to the tibia.

Joint preserving surgery for rheumatoid forefoot deformities improves pain and corrects deformity at midterm follow-up

BACKGROUND

Rheumatoid arthritis is a chronic autoimmune disorder that commonly affects the metatarsophalangeal (MTP) joints. Conventional surgical treatment involves joint-sacrificing surgery to relieve pain and correct deformity.

OBJECTIVES

We retrospectively reviewed 49 patients with rheumatoid forefoot deformities who underwent 66 joint preserving procedures with Scarf osteotomy of the first metatarsal and Weil's shortening osteotomy of the lesser metatarsals.

METHOD

There were 5 males and 44 females with mean age 56.1 years and mean follow-up 51 months. All patients were evaluated clinically and radiologically with hallux valgus angle (HVA) and inter-metatarsal angle (IMA).

RESULTS

Mean AOFAS score improved from 39.8 preoperatively to 88.7 at final follow-up. Subjectively patients reported their outcome as excellent in 49 feet (74%), good in 9 feet, fair in 7 feet and poor in 1 foot. Five feet had residual stiffness and 11 residual pain. Mean HVA and IMA decreased from 32° to 14° and from 15° to 11° respectively.

CONCLUSION

In intermediate to severe stages of the disease, joint preserving surgery by Scarf osteotomy of the first MTP joint and Weil osteotomy of the lesser metatarsals may be performed as an alternative to joint-sacrificing procedures and should be considered as a complement to the various surgical treatments of the rheumatoid forefoot.

Responsiveness of the Manchester-Oxford Foot Questionnaire (MOXFQ) compared with AOFAS, SF-36 and EQ-5D assessments following foot or ankle surgery

The responsiveness of the Manchester-Oxford Foot Questionnaire (MOXFQ) was compared with foot/ankle-specific and generic outcome measures used to assess all surgery of the foot and ankle. We recruited 671 consecutive adult patients awaiting foot or ankle surgery, of whom 427 (63.6%) were female, with a mean age of 52.8 years (18 to 89). They independently completed the MOXFQ, Short-Form 36 (SF-36) and EuroQol (EQ-5D) questionnaires pre-operatively and at a mean of nine months (3.8 to 14.4) post-operatively. Foot/ankle surgeons assessed American Orthopaedic Foot and Ankle Society (AOFAS) scores corresponding to four foot/ankle regions. A transition item measured perceived changes in foot/ankle problems post-surgery. Of 628 eligible patients proceeding to surgery, 491 (78%) completed questionnaires and 262 (42%) received clinical assessments both pre- and post-operatively. The regions receiving surgery were: multiple/whole foot in eight (1.3%), ankle/hindfoot in 292 (46.5%), mid-foot in 21 (3.3%), hallux in 196 (31.2%), and lesser toes in 111 (17.7%). Foot/ankle-specific MOXFQ, AOFAS and EQ-5D domains produced larger effect sizes (> 0.8) than any SF-36 domains, suggesting superior responsiveness. In analyses that anchored change in scores and effect sizes to patients' responses to a transition item about their foot/ankle problems, the MOXFQ performed well. The SF-36 and EQ-5D performed poorly. Similar analyses, conducted within foot-region based sub-groups of patients, found that the responsiveness of the MOXFQ was good compared with the AOFAS. This evidence supports the MOXFQ's suitability for assessing all foot and ankle surgery.

Validity, reliability, and responsiveness of a self-reported foot and ankle score (SEFAS)

BACKGROUND AND PURPOSE

A questionnaire was introduced by the New Zealand Arthroplasty Registry for use when evaluating the outcome of total ankle replacement surgery. We evaluated the reliability, validity, and responsiveness of the modified Swedish version of the questionnaire (SEFAS) in patients with osteoarthritis or inflammatory arthritis before and/or after their ankle was replaced or fused.

PATIENTS AND METHODS

The questionnaire was translated into Swedish and cross-culturally adapted according to a standardized procedure. It was sent to 135 patients with ankle arthritis who were scheduled for or had undergone surgery, together with the foot and ankle outcome score (FAOS), the short form 36 (SF-36) score, and the EuroQol (EQ-5D) score. Construct validity was evaluated with Spearman's correlation coefficient when comparing SEFAS with FAOS, SF-36, and EQ-5D, content validity by calculating floor and ceiling effects, test-retest reliability with intraclass correlation coefficient (ICC), internal consistency with Cronbach's alpha (n = 62), agreement by Bland-Altman plot, and responsiveness by effect size and standardized response mean (n = 37).

RESULTS

For construct validity, we correlated SEFAS with the other scores and 70% or more of our predefined hypotheses concerning correlations could be confirmed. There were no floor or ceiling effects. ICC was 0.92 (CI 95%: 0.88-0.95), Cronbach's alpha 0.96, effect size was 1.44, and the standardized response mean was 1.00.

INTERPRETATION

SEFAS is a self-reported foot and ankle score with good validity, reliability and responsiveness, indicating that the score can be used to evaluate patients with osteoarthritis or inflammatory arthritis of the ankle and outcome of surgery.

Lower extremity-specific measures of disability and outcomes in orthopaedic surgery

Outcome measures may be simple questions or complex measures that assess multiple interrelated domains affecting treatment outcomes. Outcome measures should be relevant to patients, easy to use, reliable, valid, and responsive to clinical changes. Joint and disease-specific outcome measures have been developed for the hip, knee, and foot and ankle. Many of these measures would benefit from further research into their validity, reliability, and optimal applicability. General health measures and activity level scores should be included in outcome assessments after treatment for orthopaedic conditions.

Medium- to long-term outcome of ankle arthrodesis

BACKGROUND

Despite improvement in outcome after ankle arthroplasty, fusion of the ankle joint is still considered the gold standard. A matter of concern is deterioration of clinical outcome as a result of loss of motion and advancing degeneration of adjacent joints. We performed a long-term study to address these topics.

METHODS

Between 1990 and 2005 a total of 121 ankle arthrodeses were performed at our institute. Thirty-five cases were excluded because of simultaneous subtalar arthrodesis. Ten had died and ten were lost to followup. Six had a bilateral ankle arthrodeses, leaving 60 patients (66 ankles) eligible for followup. There were 40 males and 26 females with a mean age at surgery of 47 years. In 60 ankles, fusion was obtained using a two-incision, three-screw technique. All patients were assessed using validated questionnaires and clinical rating systems: Short Form 36 (SF-36), American Orthopaedic Foot and Ankle Society (AOFAS) Ankle and Hindfoot scale, Foot and Ankle Ability Measure (FAAM) and a subjective satisfaction rating. Radiological progression of osteoarthritis of the adjacent joints was assessed.

RESULTS

Fusion was achieved in 91% after primary surgery. In six patients rearthrodesis was needed to obtain fusion. The mean SF-36 score was 63 (SD, 22) for the physical component scale and 81 (SD, 15) for the mental component scale. The mean FAAM score was 69 (SD, 17) and the mean AOFAS Ankle Hindfoot score was 67 (SD, 12). Ninety-one percent were satisfied with their clinical result. Infection occurred once. No other serious adverse events were encountered. In all contiguous joints significant progression of arthritis was appreciated.

CONCLUSION

Ankle arthrodesis using a two-incision, three-screw technique was a reliable and safe technique for the treatment of end-stage osteoarthritis of the ankle. It resulted in a good functional outcome at a mean followup of 9 years. Progressive osteoarthritis of the contiguous joints was clearly appreciated but the functional and clinical importance of these findings remains unclear.

Normative data of the Visual Analogue Scale Foot and Ankle (VAS FA) for pathological conditions

BACKGROUND

The purpose of this study was to analyze the Visual Analogue Scale Foot and Ankle (VAS FA) in patients to obtain normative data for pathological conditions.

METHODS

The VAS FA was consecutively obtained in a foot and ankle outpatient clinic. The score results were categorized into different pathological foot and ankle conditions.

RESULTS

414 patients were evaluated. Overall scores and score categories of all pathology groups differed from non-pathological data (n=121). Within the different groups, no score differences occurred. Score standards were defined for these groups with sufficient statistical power (>.8): isolated Hallux valgus, Hallux valgus and claw toes, forefoot other pathology, midfoot other pathology, hindfoot pathology and ankle deformity. No standards were defined for other pathology groups.

CONCLUSIONS

The obtained data is normative for different pathological conditions of the earlier validated VAS FA. The obtained data is normative for different pathological conditions of the earlier validated VAS FA. This data could serve as a basis for assessment patient scoring before, during and after treatment which has to then to be proved by ongoing research.

Results of total ankle arthroplasty

Most published reports related to total ankle arthroplasty have a fair to poor-quality level of evidence. Comparative studies with a fair to good-quality level of evidence suggest that total ankle arthroplasty provides equal pain relief and possibly improved function compared with ankle arthrodesis. On the basis of the current literature, survivorship of total ankle arthroplasty implants, when measured as the retention of metal components, ranges from 70% to 98% at three to six years and from 80% to 95% at eight to twelve years. Several investigators have argued that, in the evolution of total ankle arthroplasty, some obligatory reoperation without removal of the metal implants is anticipated; examples of reoperation include relief of osseous or soft-tissue impingement, improvement of alignment or stability of the foot and ankle, bone-grafting for cystic lesions, and/or polyethylene exchange. A successful return to low-impact, recreational sporting activities is possible after total ankle arthroplasty.

Trimalleolar fracture with involvement of the entire posterior plafond

BACKGROUND

A special type of trimalleolar fracture with the involvement of the entire posterior tibial plafond has been reported recently. Because of the low incidence, the characteristics of the fracture in different studies have not been consistent. We describe our clinical experience with this fracture type.

MATERIALS AND METHODS

From January 2007 to December 2009, 12 patients were identified with a trimalleolar fracture with involvement of entire posterior tibial plafond. All the fractures were openly reduced and fixed through a combined operative approach (posterolateral and posteromedial). Ten of 12 patients were followed up. The clinical outcome was assessed with the Short Form-36 (SF-36) and standardized AAOS foot and ankle questionnaire, and the radiological evaluation with an osteoarthritis-score (OA-score).

RESULTS

Based on the pathoanatomy of the posteromedial malleolar fragment, all the fractures could be classified into two types. Using a combined operative approach, anatomical reduction and stable fixation was accomplished in all 12 patients. At a mean followup of 18.9 (range, 12 to 30) months, 10 patients achieved a good radiological result and satisfactory clinical recovery.

CONCLUSION

This fracture pattern may be classified into two types with different injury mechanisms, which has not been described previously. After anatomic reduction and stable fixation through a combined operative approach, the short-term outcome was good.

Is barefoot regional plantar loading related to self-reported foot pain in patients with midfoot osteoarthritis

OBJECTIVE

While recent evidence suggests that foot pain may be related to mechanical stress, quantitative data elucidating the role of regional plantar loading in foot pain in individuals with midfoot osteoarthritis (OA) are lacking. Therefore the authors' objective is to examine regional plantar loading and self-reported foot pain in patients with midfoot OA compared to asymptomatic, matched control subjects.

METHOD

Fifty subjects, 30 patients with midfoot OA and 20 control subjects participated in this study. Self-reported function was assessed using the Foot Function Index-Revised (FFI-R). Plantar loading during barefoot walking at self-selected, monitored walking speed was quantified using an EMED pedobarograph. Between-group differences in FFI-R score and plantar loading were assessed using an independent t-test and the Mann-Whitney U-test respectively. The relationship between FFI-R score and plantar loading was assessed using Spearman rank correlation. A k-means cluster analysis was used to identify potential sub-groups of patients through regional plantar loading.

RESULTS

The key findings of this study showed that patients with midfoot OA reported significantly higher FFI-R scores, and higher heel and medial midfoot average pressure compared to control subjects. Medial midfoot pressure-time integral was positively associated with FFI-R Pain Subscale Score (r=0.524, P<0.01). Based on the adequacy index, the two-cluster solution was deemed most appropriate.

CONCLUSION

This study demonstrated that patients with midfoot OA sustain increased magnitude and duration of regional plantar loading during walking compared to matched control subjects. Our findings support the theory that regional mechanical stress may be associated with symptoms in patients with midfoot OA. Future studies should assess whether interventions designed to reduce plantar loading are effective in relieving foot pain, and preventing progression of symptoms in patients with midfoot OA.

Validation of the American College of Foot and Ankle Surgeons Scoring Scales

The American College of Foot and Ankle Surgeons (ACFAS) assembled a task force to develop a scoring scale that could be used by the membership and practitioners-at-large. The original publication that introduced the scale focused primarily on use of the scale and provided only brief background on the development of the health measurement instrument. Concerns regarding the validity and reliability of the scale were raised within the professional community, and ACFAS assembled a task force to address these concerns. The purpose of this article is to address the issues raised by reporting the detailed methods used in the development of the ACFAS Scoring Scales. The authors who constitute this task force reviewed the body of work previously conducted and applied standards that serve to evaluate the scoring scale for: 1) validity, 2) reliability, and 3) sensitivity to change. The results showed that a systematic and comprehensive approach was used in the development of the scoring scales, and the task force concluded that the statistical methods and instrument development process for all 4 modules of the scoring scales were conducted in an appropriate manner. Furthermore, modules 1 and 2 have been rigorously assessed and the elements of these modules have been shown to meet standards for validity, reliability, and sensitivity to change.

Surgical treatment of advanced hallux rigidus by interpositional arthroplasty

BACKGROUND

While arthrodesis is the gold-standard for end-stage hallux rigidus, it leads to loss of mobility. The purpose of this paper was to report our clinical results with modified interpositional arthroplasty for the treatment of advanced (Grade III and IV of Coughlin and Shurnas) hallux rigidus.

MATERIAL AND METHODS

Twenty-five feet with Grade III and IV hallux rigidus underwent cheilectomy, minimal proximal phalanx resection (modified Keller) and interposition of the dorsal capsule and EHB.

RESULTS

At a minimum followup of 15 months, the mean postoperative hallux AOFAS score was 93.6 points with a pain subscore of 36.4 (maximum, 40 points) and functional subscore of 42.5 (maximum, 45 points). Subjectively, patients were completely satisfied with the surgical outcome in 75% of the cases.

CONCLUSION

The modified interpositional arthroplasty was a feasible surgical option to address advanced hallux rigidus in middle aged patients.

Comparison of different outcome instruments following foot and ankle trauma

BACKGROUND

Identifying optimal treatment strategies in patients with traumatic foot and ankle injuries has been hampered by the use of multiple available outcome measures with unproven reliability and validity. This prospective observational study aimed to measure the correlation between six functional outcome measures in patients with traumatic foot and ankle injuries.

MATERIALS AND METHODS

Patients 18 years of age or older with a traumatic foot or ankle injury completed the Short Form-12 (SF-12), Short Musculoskeletal Functional Assessment (SMFA), Foot Function Index (FFI), Foot and Ankle Ability Measure (FAAM), American Academy of Orthopedic Surgeons (AAOS), Foot and Ankle Questionnaire and American Orthopedic Foot and Ankle Society (AOFAS) Ankle-Hindfoot Scale at a single followup visit. Raw scores for each of the outcome measures were calculated. Fifty-two patients were enrolled in our study. Pearson correlation coefficients provided measures of correlation.

RESULTS

Moderate to strong correlations were found for most pairwise comparisons of raw scores and functional categorical rankings (ρ=|0.5243 to 0.92|, p < 0.002). The strongest correlations were found between the SMFA, FFI, FAAM and AAOS Foot and Ankle Questionnaire.

CONCLUSION

High correlations between scores on six commonly used functional outcome instruments suggest it is likely unnecessary to use more than one instrument when examining functional outcome in patients with traumatic foot and ankle injuries. However, inconsistencies between measures in the same patient population suggest a need for further validation and scrutiny.

A pilot study to explore if the age that women undergo hallux valgus surgery influences the post-operative range of motion and level of satisfaction

BACKGROUND

Scarf and Akin osteotomies are commonly used to treat hallux valgus. One post-operative complication is a reduction in the range of motion at the first metatarsophalangeal joint. This can cause pain and restrict the heel height of footwear. This pilot study aims to examine if women's age has an effect on the post-operative outcome following Scarf and Akin osteotomies.

METHODS

A pilot study using a convenience sample compared the outcomes of two groups of female patients, those aged under 50 and those aged over 50. The range of motion at the first metatarsophalangeal joint was measured using a goniometer, the American Orthopaedic Foot and Ankle Society (AOFAS) scale and satisfaction levels were collected 2 years post-operatively.

RESULTS

There were no significant statistical differences between the two age groups for the outcomes measured. Similar AOFAS scores and ranges of motion were found for both age groups. Satisfaction levels were high but the under 50-year group were slightly less satisfied.

CONCLUSIONS

The outcome of this pilot study suggests that age does not have an effect on the range of motion of the first metatarsophalangeal joint, the AOFAS score or the level of patient satisfaction 2 years following Scarf and Akin osteotomies.

Pedobarographic analysis and quality of life after Lisfranc fracture dislocation

BACKGROUND

Few studies on tarsometatarsal fracture dislocations report on plantar pressure analysis and quality of life. The primary aim of this study was to determine the added value of plantar pressure analysis. The secondary aim was to determine quality of life and functional outcome.

MATERIALS AND METHODS

With a median followup of 76 months, 26 patients with an isolated Lisfranc injury participated. The Short Form 36 (SF-36) was used to determine the health related quality of life. Functional outcome was assessed with the American Orthopaedic Foot Ankle Society (AOFAS) midfoot score and a Visual Analog Scale (VAS). A Wilcoxon Signed Rank test was used to assess whether plantar pressure and foot position variables differed between the injured and uninjured foot. Correlations between outcome data were identified using Spearman Rank Correlation.

RESULTS

With respect to the plantar pressure analysis, a reduced contact time of the forefoot was found for the injured foot compared with the contralateral side (p = 0.045). The injured side showed reduced contact surface of the forefoot (p = 0.048) and an increased contact surface for the midfoot (p = 0.019). The latter was paralleled by higher maximum pressures at the midfoot (p = 0.016). Patients reported a median score of 101 for the SF-36, 72 for the AOFAS midfoot score, and 7 for the VAS.

CONCLUSION

Plantar pressure measurements showed an adjusted walking pattern. Despite a fair outcome score, the quality for life of patients following a Lisfranc fracture dislocation returned to normal compared with normative data for the general population.

Does total joint replacement or arthrodesis of the first metatarsophalangeal joint yield better functional results? A systematic review of the literature

As first metatarsophalangeal joint arthrodesis is generally considered to be a successful procedure for the treatment of hallux rigidus, many surgeons question the usefulness of total joint replacement. In an effort to elucidate the clinical evidence, we undertook a systematic review of the literature comparing the functional outcomes of arthrodesis and joint replacement in first metatarsophalangeal surgery. Using multiple search engines and medical subject headings, 10 articles were eligible for inclusion: 5 featured arthrodesis and 5 featured total joint replacement. The American Orthopaedic Foot and Ankle Society-Hallux metatarsophalangeal-interphalangeal score was used in all articles. The mean age at operation was 53 years for joint replacement patients and 55 for those undergoing joint arthrodesis. Most patients in all studies were female. There was a significant increase from pre- to postoperative scores in both procedures. The median postoperative score for joint replacement was 83/100 (range 74-95) and 82/100 (range 78-89) for arthrodesis. The median revision rate in joint replacements was 7% (range 0%-10%) and 0% (range 0%-12%) for arthrodesis. This systematic review reveals that arthrodesis achieves better functional outcomes than total joint replacement. The operative techniques and prostheses for joint replacements are however still in an early stage of development and advances still need to be achieved to produce a more successful and anatomical prosthesis that could be functionally superior to an arthrodesis.

ANALYSIS OF CLINICAL AND FUNCTIONAL OUTCOME AND COMPLICATIONS OF TALAR NECK FRACTURES

Objective: To evaluate the clinical, functional and radiographic results from talar neck fractures in patients treated at the Foot and Ankle Surgery Group of Santa Casa de Sao Paulo. Method: We evaluated 20 patients. The mean follow-up time was 71 months. One fracture was classified as Hawkins Type I, 12 as Hawkins type II, five as Hawkins type III, two as Hawkins type IV and four fractures were open. Results: One patient was treated conservatively, 16 were treated with open reduction and internal fixation (three with primary subtalar arthrodesis), one was treated with talectomy and two with tibiotalocalcaneal arthrodesis. The reduction obtained was anatomical in seven feet, acceptable in six feet and poor in four. Seven patients had early complications. There was one case of delayed consolidation and four of talar body osteonecrosis. Four patients required secondary reconstruction procedures. No significant radiographic impairment of the ankle joint was found in 62% of the patients and of the subtalar joint in 25%. Of the patients who did not undergo secondary procedures, 81% complained about the treated foot, 37.5% showed some deformity, 44% presented diminished sensitivity and 50% had to retire from work. The mean loss of motion in the ankle was 49%, and in the subtalar joint, 80%. The average AOFAS score was 73 points. Conclusion: Talar neck fractures are associated with high rates of clinical, functional and radiographic complications.

Reconstruction of the spring ligament using a peroneus longus autograft tendon transfer

BACKGROUND

The spring (calcaneonavicular) ligament provides one of the main static supports of the medial arch of the foot. The purpose of this study was to retrospectively assess the results of patients having undergone reconstruction of the spring ligament using a peroneus longus tendon autograft left at its distal attachment and passed through the navicular followed by either a calcaneal or tibial drill hole, a technique not previously reported.

MATERIALS AND METHODS

Thirteen consecutive patients (14 feet) (mean age, 63.5 +/- 12.3 years) undergoing flatfoot surgery with spring ligament reconstruction for cases in which lateral column lengthening failed to correct talonvavicular deformity were reviewed. The AOFAS, FAOS, and SF-36 were assessed along with standard weightbearing radiographs at a followup visit at a mean of 8.9 +/- 1.8 years after surgery. Hindfoot alignment and eversion strength were measured.

RESULTS

The AOFAS ankle-hindfoot score increased from 43.1 to 90.3 (\hbox{p}\leq 0.001). The postoperative FAOS pain subscale and overall SF-36 were 83.7 (range, 67.9 to 100), and 77.3 (range 37.8 to 95.6) respectively. The AP first tarsometatarsal angle (p = 0.015), talonavicular coverage angle (p = 0.003), lateral calcaneal pitch (p = 0.002), and lateral talonavicular angle (p = 0.017) improved significantly and were within normal ranges postoperatively. The mean hindfoot alignment measured 2.7 degrees of valgus. All but one patient had normal (5/5) eversion strength.

CONCLUSION

Reconstruction of the spring ligament resulted in few complications and might be considered as an alternative to arthrodesis in patients with ruptures of the spring ligament and deformity that does not correct fully with bony procedures alone.

Evaluation of the ankle function following reconstruction of the donor defect with a split fibular bone after a vascularized fibular flap transfer

INTRODUCTION

To validate the hypothesis that the reconstruction of the missing segment of the fibula using a redundant split fibular graft after a vascularized fibular flap transfer may have a better effect on ankle function.

MATERIALS AND METHODS

Of the 24 head and neck cancer patients who received a free fibula flap for mandible reconstruction, 14 patients underwent the conventional method of donor site closure, in which the redundant fibular bone was discarded (Group I). Ten patients underwent longitudinal osteotomy of the redundant non-vascularized fibular portion to bridge the donor site defect (Group II). Postoperative subjective satisfaction level was evaluated with a self-constructed questionnaire in 10 parameters (ambulation with assistance, ankle instability, ankle stiffness, muscle weakness, leg edema, foot numbness, ankle pain, other sites of pain besides the ankle, and restriction to run) and the 4 voluntary motions (dorsiflexion, plantar flexion, eversion, and inversion) of both ankles were measured using a CYBEX II dynamometer.

RESULTS

The muscle peak torque of the donor leg was significantly lower at ankle plantar flexion (P = 0.002), eversion (P = 0.002), and inversion (P = 0.0002) in Group I as well as at dorsiflexion (P = 0.031), plantar flexion (P = 0.016), and inversion (P = 0.002) in Group II against the contralateral non-operated leg. The muscle power was significantly greater when performing ankle eversion (P = 0.049) in those who underwent split fibular bone reconstruction. There was no difference in the subjective satisfaction score between these two groups.

CONCLUSION

The reconstruction of the donor site with a split fibular bone graft led only a slight improvement in ankle eversion.

Outcome following autogenous soft tissue interpositional arthroplasty for end-stage hallux rigidus: a systematic review

Autogenous soft tissue interpositional arthroplasty has been proposed as an alternative to arthrodesis and other forms of arthroplasty for treatment of end-stage hallux rigidus because of the perceived safety and efficacy. The author undertook a systematic review of electronic databases and other relevant sources to identify material relating to the outcomes following autogenous soft tissue interpositional arthroplasty for end-stage hallux rigidus. Information from peer-reviewed journals, as well as from non-peer-reviewed publications, abstracts and posters, textbooks, and unpublished works, were also considered. In an effort to procure the highest quality studies available, studies were eligible for inclusion only if they involved consecutively enrolled patients undergoing isolated autogenous soft tissue interpositional arthroplasty for the treatment of end-stage hallux rigidus, evaluated patients at mean follow-up of 12-months' duration or longer, included pre- and postoperative range of motion of the first metatarsal-phalangeal joint, determined pre- and postoperative outcomes using a scoring system, and documented any complications. Two studies involving a total of 28 autogenous soft tissue interpositional arthroplasties for end-stage hallux rigidus were identified that met the inclusion criteria. There were 12 men (52%) and 11 women (48%) with a mean age of 58.2 years followed for a mean of 21.6 months. Both studies used the AOFAS First Metatarsal-Phalangeal-Hallux Scoring System, which had a mean of 26.0 preoperatively rising to 89.4 postoperatively. First metatarsal-phalangeal joint dorsiflexion had a mean of 16.7 degrees preoperatively rising to 51.1 degrees postoperatively. Complications occurred in 4 (14.3%) feet and no feet required surgical revision. The results of this systematic review demonstrate improvement in patient outcomes and first metatarsal-phalangeal joint dorsiflexion, as well as few complications following autogenous soft tissue interpositional arthroplasty for end-stage hallux rigidus. However, there is still a need for methodologically sound prospective cohort studies that compare autogenous soft tissue interpositional arthroplasty with other forms of arthroplasty and arthrodesis for end-stage hallux rigidus.

The International Documentation and Evaluation System IDES: a single center observational case series for development of an ankle prosthesis documentation questionnaire and study of its feasibility and face validity

Background

The number of implanted total ankle replacements is increasing and most articles present short- and mid-term results. Comparison of outcomes is difficult because of inconsistent terminology and different use of parameters.

Materials and methods

We created a module for total ankle prostheses in the framework of the International Documentation and Evaluation System (IDES). Content development was conducted with an iterative process based on a single surgeon series of 74 HINTEGRA^© total ankle replacements and expert opinions.

Results

The IDES ankle module comprises three forms A, B and C for recording of primary (A), revision (B) and followup (C) procedures. 74 primary interventions, 28 revisions and 92 followups could be documented in detail with the final version of the questionnaires.

Conclusion

The IDES-forms facilitate a structured and standardized data collection for total ankle arthroplasties. Implemented on the academic MEMdoc portal http://www.memdoc.org of the University of Bern, all registered users can make use of IDES in its online or paper based versions.

Which are the most frequently used outcome instruments in studies on total ankle arthroplasty?

The number of studies reporting on outcomes after total ankle arthroplasty is continuously increasing. As the use of valid outcome measures represents the cornerstone for successful clinical research, we aimed to identify the most frequently used outcome instruments in ankle arthroplasty studies and to analyze the evidence to support their use in terms of different quality criteria. A systematic review of the literature identified 15 outcome instruments reported in 79 original studies. The most commonly used measures were the American Orthopaedic Foot and Ankle Society hindfoot score (n = 41), the Kofoed ankle score (n = 21), a visual analog scale assessing pain (n = 15), and the generic SF-36 (n = 6). Eight additional instruments were used only once or twice. The American Orthopaedic Foot and Ankle Society and Kofoed instruments include a clinical examination and score up to 100 points. Evidence to support their use in terms of validity, reliability, responsiveness, and interpretability is limited, raising the question whether their use is justified. Self-reported questionnaires related to ankle osteoarthritis or arthroplasty are rather disregarded in the current literature, and only the Foot Function Index is associated with evidence in terms of the above-mentioned quality criteria. Future research is warranted to improve the outcome assessment after total ankle arthroplasty.

Outcomes of minimally invasive plate osteosynthesis for metaphyseal distal tibia fractures

OBJECTIVE

Evaluation of clinical results and outcomes of low metaphyseal distal tibia fractures with minimal or no intra-articular involvement. These were treated using the minimally invasive plate osteosynthesis concept with a 3.5-mm locked medial tibial plafond plate and hybrid (locking and nonlocking) screw construct.

SETTING

Level II regional trauma center.

DESIGN

Consecutive case series of clinical outcomes using limb-specific and whole-person measures.

INTERVENTION

Minimally invasive medial plating using hybrid locking and nonlocking techniques.

MAIN OUTCOME MEASUREMENT

The following were applied at a minimum of 2 years: limb assessment--Olerud and Molander's ankle rating scale and the American Orthopaedic Foot and Ankle Surgeon's (AOFAS) ankle-hindfoot instrument, whole-person assessment--the Short Form 36 (SF-36).

RESULTS

Thirty-eight patients were followed an average of 32 months (range, 12-48 months). Mean fracture healing time was 21 weeks (range, 9-60 weeks). Acceptable alignment and length were restored (angulation <or=5 degrees or shortening <or=1 cm) in all but one case. One patient (3%) had loss of fixation and two (5%) underwent secondary surgeries to achieve union. In 30 patients at >2 years, the AOFAS and the Olerud and Molander ankles scores averaged good-excellent. SF-36 outcomes scores were lower than that of normative data in patients with uninjured limbs but only significantly diminished in physical function.

CONCLUSIONS

Minimally invasive medial plating using a hybrid locking plate technique in metaphyseal fractures of the distal tibia predictably restored limb alignment with a 5% reoperation rate and yielded mostly good-excellent ankle scores. There were residual impairments seen on whole-body outcomes measures.