Semi-extended extra-synovial (SEES) tibial intramedullary nailing technique: Up to 10 year retrospective analysis of outcomes and anterior knee pain rates.

Background: Tibial intramedullary nailing is a common method of fixation for fractures of the tibia, with several approaches described. Anterior knee pain is a common complication following nailing, but the reported incidence of knee pain varies in the literature between 10 % and 86 %. There is considerable variation in incidence between nailing techniques, with an exact aetiology still unknown. We investigated the reported incidence of anterior knee pain in patients undergoing tibial nailing using the semi-extended extra synovial (SEES) technique at a Major Trauma Centre (MTC) in the UK. Methods: A retrospective review of tibial fractures treated with the SEES technique between December 2012 to February 2021. Data collected included patient demographics, mechanism of injury, fracture characteristics, length of stay, union rates and re-operation rates. Primary outcomes were anterior knee pain rates and patient reported outcome measures (PROM), the Kujala Score. Secondary outcomes were rates of union and complications. Results: 55 fractures were identified in 53 patients. Male: Female ratio was 32:21. The average age was 45.5 years. 96 % were unilateral fractures; with 53 % being right-sided. 21(38 %) fractures were open. Prior to definitive nailing 21 fractures had temporary stabilisation with an external fixator (Ex-Fix) ± wound debridement whilst the rest received plaster backslab immobilisation. 13 of the open fractures required soft tissue cover. 75 % of patients had initial surgery (SEES Nailing/Ex-Fix) within 4 days. There was a 91 % union rate with a median time to full radiographic union of 14 months. One post-operative complication of wound dehiscence was recorded. The mean follow-up time was 13.6 months. 15 % of patients reported anterior knee pain in the postoperative follow-up period. The average Kujala PROM score was 85 (Range: 52-100). Conclusion/findings: The SEES technique had favourable PROM scores and displayed a lower incidence of anterior knee pain than the traditional infrapatellar approach. Knee pain rates were comparable to suprapatellar approaches without violating the knee joint. Disclosures: None.

Results of Medial Patellofemoral Ligament Reconstruction with and without Tibial Tubercle Transfer in Patellar Instability: A Systematic Review and Meta-Analysis.

The optimal surgical intervention for lateral patellar instability remains a topic of controversy despite satisfactory clinical outcomes and low re-dislocation rates reported in numerous studies following medial patellofemoral ligament reconstruction (MPFLR) with and without tibial tubercle transfer (TTT). The purpose of this systematic review and meta-analysis is to investigate the hypothesis that combining MPFLR with TTT provides reduced complication rates and improved clinical outcomes to isolated MPFLR in patients with lateral patellar instability. We conducted a comprehensive systematic review and meta-analysis of comparative trials involving MPFLR with and without TTT, sourcing data from PubMed, the Cochrane Library, Embase, and Web of Science. The primary clinical outcomes analyzed included the Kujala score, the Lysholm score, complication rates, and the Caton-Deschamps index (CDI). Random or fixed effects were used for the meta-analysis. Postoperatively, there were no significant differences observed in the Kujala and Lysholm scores between MPFLR and MPFLR + TTT (p = 0.053). At the final follow-up, the CDI had decreased 0.015 (95% CI -0.044, 0.013; p = 0.289) points in the MPFLR group, with no statistical significance. In contrast, the MPFLR + TTT group demonstrated a significant decrease of 0.207 (95% CI -0.240, -0.174; p = 0.000) points in CDI. Notably, the complication rate was higher in the MPFLR + TTT group compared to the MPFLR-only group (RR = 2.472; 95% CI 1.638, 3.731; p = 0.000). Both MPFLR and MPFLR + TTT procedures yield significant improvements in the Kujala and Lysholm scores. However, the MPFLR + TTT approach results in an apparent improvement in CDI and corrects patellar maltracking, particularly in cases involving high tibial tuberosity-trochlear groove (TT-TG) (>20 mm) or patella alta (CDI > 1.2), while MPFLR alone cannot. It is essential to consider the higher complication rate of MPFLR + TTT, which suggests that MPFLR alone may be sufficient for patients without high TT-TG or patella alta.

Double-bundle ACL reconstruction versus anatomic single-bundle ACL reconstruction combined with anterolateral ligament reconstruction: a comparative study of clinical outcome.

INTRODUCTION: Recent studies showed increasing evidences of anterolateral ligament (ALL) reconstruction in conjunction with anterior cruciate ligament (ACL) reconstruction that proves to be more superior to the previous double-bundle (DB) ACLR technique especially in improving knee stability in biomechanic studies. However to date, there have been no studies evaluating the functional outcome of DB-ACLR vs single-bundle (SB) with ALL in ACLR. METHODS: A total of 138 patients with ACL deficient knee were enrolled to the study. Double-bundle ACL reconstruction (DB-ACLR) was performed in 75 patients and single-bundle ACL reconstruction with anterolateral ligament reconstruction (SB + ALL) ACLR was performed in 63 patients. Surgical outcomes were compared with The International Knee Documentation Committee Subjective Knee Form (IKDC) and the Kujala score at the 3rd, 6th and 9th month post-operative. RESULTS: The IKDC score in the 3rd and 6th month was superior in the SB + ALL group compared to the DB group. However, this difference was not statistically significant. In the meantime, there were no statistically significant difference between the Kujala Score at the 3rd, 6th, and 9th months consecutively. There were no statistically significant differences in the functional outcomes of DB-ACLR and SB + ALL groups at the 3rd, 6th, and 9th months post-operative period. CONCLUSION: The functional outcome comparison showed non-superiority of SB + ALL group compared to the DB-ACLR group. The patellar pain was less found in DB-ACLR group at 6- and 9-months post-operative period.

Patellofemoral functional outcome of gracilis sparing compared to gracilis sacrificing ACL reconstruction.

Introduction: The hamstring is the most popular autograft used for anterior cruciate ligament reconstruction (ACLR). Despite its excellent outcome, donor site morbidity is also irritating. Patellofemoral problems are reported to be one of the side effects after hamstring autograft harvesting, suggested to be due to both gracilis & semitendinosus sacrificing. Some experts propose retaining gracilis to decrease patellofemoral problems. The all-inside technique is an advantageous ACLR technique that can preserve the gracilis muscle while reducing muscle strength loss of affected limbs and the risk of knee joint instability under rotational load. This study aims to compare the patellofemoral functional outcome of both gracilis sparing and sacrificing using a validated Kujala score three months after ACLR. Methods: There was total of 20 subjects who underwent ACLR between December 2021 and May 2022 and met the inclusion criteria. They were then grouped into gracilis sparing group (n = 10) and gracilis sacrificing group (n = 10). Follow up assessment (Kujala Score) was conducted during phase II of the rehabilitation program. The assessed variables were surgery technique, time of surgery-to-evaluation, and Kujala Score. Result: There were no significant differences in Kujala Score between gracilis sparing and gracilis sacrificing groups (p = 0.809). There was a strong positive correlation between the time of surgery-to-evaluation and Kujala Score in each group (p = 0.942 and p = 0.910, respectively). Conclusion: There are no differences in patellofemoral functional outcomes between patients who undergo gracilis sparing and gracilis sacrificing ACLR with good scores of Kujala, which means both gracilis sparing and sacrificing show no harm to the patellofemoral after the ACLR.

Active exercise therapy improves the recovery of knee joint function and reduction of muscle atrophy after medial patellofemoral ligament reconstruction for recurrent patellar dislocation.

Objectives: Medial patellofemoral ligament (MPFL) reconstruction is an important surgical therapy for recurrent patellar dislocation. However, few studies have focused on exercise therapy after MPFL reconstruction. Therefore, the first purpose was to compare the active and traditional postoperative exercise therapies on the recovery of knee joint function and reduction of muscle atrophy after MPFL reconstruction, and the second purpose was to compare the active and traditional postoperative exercise therapies on the patellar stability after MPFL reconstruction. Methods: The cases of 31 patients with recurrent patellar dislocation treated with patella double semi-tunnel anatomical MPFL reconstruction from February 2016 and February 2019 were retrospectively reviewed. The clinical outcomes, including the patellar tilt angle (PTA), lateral patellofemoral angle (LPFA), thigh circumference reduction, Kujala score, and Lysholm score, were compared between two groups (i.e., active exercise and traditional exercise groups) preoperatively, 3 months postoperatively, 6 months postoperatively, 12 months postoperatively, and 24 months postoperatively. Results: The Kujala score was significantly higher in the active exercise group than traditional exercise group 3 months postoperatively (80.06 vs. 74.80, P < 0.01), 6 months postoperatively (89.19 vs. 82.07, P < 0.01), 12 months postoperatively (91.43 vs. 86.60, P < 0.01), and 24 months postoperatively (92.50 vs. 90.27, P = 0.02). Similarly, there was a higher Lysholm score in the active exercise group compared with traditional exercise group 3 months postoperatively (81.25 vs. 76.53, P < 0.01), 6 months postoperatively (89.81 vs. 84.80, P < 0.01), 12 months postoperatively (93.25 vs. 88.40, P < 0.01), and 24 months postoperatively (93.69 vs. 90.67, P < 0.01). Significantly lower thigh circumference reduction was reported in the active exercise group compared with that in the traditional exercise group 3 months postoperatively (1.90 ± 0.57 vs. 2.45 ± 0.45, P < 0.01) and 6 months postoperatively (1.50 ± 0.31 vs. 1.83 ± 0.32, P < 0.01). No statistical difference was observed between the two groups in terms of PTA (P > 0.05) or LPFA postoperatively (P > 0.05). Conclusions: Our results suggested that active exercise therapy might benefit the early recovery of knee joint function and reduction of muscle atrophy in patients with recurrent patellar dislocation after MPFL reconstruction.

Validation of the cultural adaptation of the Kujala score in Arabic.

BACKGROUND: Patellofemoral pain is a common condition. The Kujala score is a well-established scoring system to assess anterior knee pain and has been translated into many languages including Arabic. The purpose of this cross-sectional study is to culturally adapt the Arabic version of the Kujala score and determine its validity. METHODS: The Kujala score is composed of 13 multiple-choice questions. We modified two questions in the score; running and squatting, and were replaced with questions related to walking on different terrain and prostration, each with the same number of answer choices as the original questions so as not to affect the final score. These modifications were written in Arabic by the same group who translated and validated the original score into Arabic. The original and modified Kujala scores was printed and given to patients complaining of patellofemoral pain to be filled during their visit to the orthopedic outpatient clinics. Final scores for the original and modified questionnaires were calculated. Data was analyzed using SPSS statistics version 21.0 measuring Cronbach's alpha, intraclass correlation coefficient, and Pearson correlation. RESULTS: Ninety-four patients were included in the study, 28 (29.8%) men and 66 (70.2%) women. The mean age for the included patients was 43.67 (± 14.46) years. The mean score for the modified initial questionnaire was 63.91 (± 16.32), and the mean score for the modified re-test questionnaire was 66.52 (± 17.50). There was a statistically significant difference between the mean scores (p = 0.041), with a mean difference of 1.97 (95% CI 0.08 to 3.856). We found a significant strong correlation between the score before and after changing the questions with a p value of < 0.001. CONCLUSIONS: The culturally modified Arabic Kujala questionnaire is shown to be a valid, well-designed tool and an appropriate method of measuring patellofemoral pain.

Arthroscopy-controlled medial reefing and lateral release for recurrent patellar dislocation: clinical, radiologic outcomes and complications.

BACKGROUND: Few studies have reported the clinical outcomes of the medial reefing procedure and lateral release with arthroscopic control of medial retinacular tension in patients with recurrent patellar dislocation. The purpose of this study was to investigate the clinical, radiologic outcomes and complications of arthroscopy-controlled medial reefing and lateral release. METHODS: Patients who underwent arthroscopy-controlled medial reefing and lateral release for recurrent patellar dislocation between November 2007 and June 2017 were retrospectively evaluated. The clinical outcome (Kujala score), radiologic outcome (congruence and patellar tilt angles), and complications were evaluated at final follow-up. The results were also compared with literature-reported outcomes of other surgical procedures for patellar dislocation. RESULTS: Twenty-five patients (mean age, 18.3 ± 4.8 years) were included in the study. The mean clinical follow-up period was 7.0 ± 2.5 (range, 3.8-12.2) years. The mean Kujala score was significantly improved from 54.7 ± 14.0 (range, 37-86) preoperatively to 91.0 ± 7.6 (range, 63-99) at a mean follow-up period of 7 years (P < 0.001). The radiologic results also significantly improved from 17.8° ± 5.9° to 6.8° ± 2.4° (P < 0.001) in the congruence angle and from 17.5° ± 8.2° to 5.6° ± 3.1° (P < 0.001) in the patella tilt angle at a mean follow-up period of 3.6 years. One patient developed a redislocation after a traumatic event, and two patients showed patellofemoral osteoarthritis progression. CONCLUSIONS: Arthroscopy-controlled medial reefing and lateral release significantly improved the clinical and radiologic outcomes of the patients with recurrent patellar dislocation at a mean follow-up period of 7 years. The results of this study are comparable with the literature-reported outcomes of other surgical procedures for patellar dislocation. LEVEL OF EVIDENCE: Level IV, retrospective therapeutic case series.

Habitual Patellar Dislocation-Management by Two in One Procedure, Short Term Results.

AIM: Habitual dislocation of patella is an uncommon pathological condition. Though numerous techniques have been described in the literature for the treatment of patellar dislocations, none of the single procedure is fully effective in the surgical treatment of habitual dislocation of patella. We described our experience with a two in one procedure for habitual dislocation of patella in ten children. PATIENTS AND METHOD: Ten children having habitual dislocation were reviewed prospectively for twelve months following surgical procedure. The age ranged between 5 and 9 years. We performed graded lateral soft tissue release and patellar tendon transposition as described by Roux Goldthwait. Clinical results were evaluated using Kujala score, ability to do straight leg raise, knee range of motion and visual analogue scale. RESULT: There has been no recurrence of dislocation. The mean Kujala score before surgery was 48 which improved to 97.8 at 12 months follow-up after the surgical procedure. At 12 months follow-up all patients were able to do straight leg raise and had almost full range of motion. CONCLUSION: We conclude that extensive proximal lateral release along with Goldthwait Roux procedure helps in treating the habitual dislocation in patella in children. Decision for the extent of lateral release must be taken intra-operatively. Our method of treatment is simple, cost effective and reproducible with excellent functional outcome.

A comparison of anterior knee pain, kneeling pain and functional outcomes in suprapatellar versus infrapatellar tibial nailing.

INTRODUCTION: Anterior knee pain and kneeling pain are some of the most common complications following intramedullary nailing of tibial shaft fractures. With the increased uptake of suprapatellar nailing at our institution, we undertook a service evaluation to assess anterior knee pain and kneeling pain in patients who underwent the suprapatellar tibial nailing technique compared with the infrapatellar approach. METHODOLOGY: Data from all consecutive intramedullary tibial nailing operations between January 2014 and July 2017 were analysed from a prospectively collected database. All acute diaphyseal fracture nailing procedures were included. All patients were reviewed between six-month and four-year post-operation. Each patient was asked to complete a standardised questionnaire with three main outcome measures: pain on kneeling, presence of anterior knee pain and the severity of pain. RESULTS: After exclusions, a total of 148 patients were identified. A total of 102 responses were received, 41 in the infrapatellar group (73.2%) and 61 in the suprapatellar group (66.3%). A longer time from surgery to telephone follow-up response was noted in the infrapatellar group: 32.4 months (interquartile range, 16.1) vs. 19.3 months (interquartile range, 17.4), p < 0.001. A trend towards lower reported anterior knee pain was noted in the suprapatellar group (67.9% VS 53.7%). Most patients reported mild or no pain on kneeling, with no significant difference between the two groups. There was also no significant difference in severity of knee pain between the two groups and no significant effect on the Kujala score. CONCLUSION: With the comparable pain outcomes between the two groups, our analysis supports the continued use of the suprapatellar tibial nailing technique for tibial shaft fractures at our institution.

Use of hyaluronic acid injection after arthroscopic release in lateral patellar compression syndrome with degenerative cartilage changes: randomized control trial.

BACKGROUND: Degenerative cartilage changes can be seen, in cases of lateral patellar compression syndrome, involving the patellofemoral joint. Hyaluronic acid is a natural component of the synovial fluid and responsible for its elastic features and function of articular surfaces. The aim of this study is to show the effect of intra-articular injection of Hyaluronic acid, after arthroscopic lateral release in lateral patellar compression syndrome, on the functional outcome and knee pain in those patients with degenerative cartilage changes. METHOD: Ninety patients age (30-50) years with lateral patellar compression syndrome and degenerative cartilage changes were divided randomly into 2 groups. Group A was treated by arthroscopic lateral release and received intraarticular injection of Hyaluronic acid 2 weeks after surgery. Group B was treated by arthroscopic lateral release only. Both groups were assessed by Kujala score and visual analogue scale for knee pain preoperatively and re-assessed postoperatively at 3 months, 6 months, 12 months and 24 months. RESULTS: There was significant improvement in Kujala score and Visual analogue scale post-operatively in both groups (P-value< 0.001) with better improvement in Kujala score in group A after intra-articular injection of Hyaluronic acid up to 2 year of follow up (P-value = 0.006) as well as better improvement in visual analogue score at 6 months post-operatively (P-value = 0.035). CONCLUSION: Intra-articular injection of Hyaluronic acid after arthroscopic release, in patients with lateral patellar compression syndrome and degenerative cartilage changes, can result in better improvement of knee pain and functional outcome up to 2 years of follow up. TRIAL REGISTRATION: NCT, NCT04134611 . Registered 18 October 2019 -Retrospectively registered.

Medial closing-wedge distal femoral varus osteotomy: Symptoms and functional impact in cases of associated patellofemoral osteoarthritis. A two-year follow-up prospective pilot study.

PURPOSE: To date, indications for distal femoral varus osteotomy (FVO) in cases of associated patellofemoral osteoarthritis (PFO) have yet to be clarified. The purpose of this prospective study is to assess the short-term symptoms, functional and radiological impact of a medial closing-wedge femoral varus osteotomy on the patellofemoral joint in patients with valgus deformities who are afflicted with lateral tibiofemoral osteoarthritis (LTFO) associated with PFO. METHODS: Fourteen patients (15 knees) received a medial closing-wedge femoral varus osteotomy. The functional impact of an FVO on the patellofemoral joint was assessed based on the KOOS-PF (Knee Injury and Osteoarthritis Outcome Score-Patellofemoral Subscale), the Kujala score and the patellofemoral symptoms. Realignment of the patella was measured by the Merchant's patellofemoral congruence angle. The pre- and post-operative symptoms and functional scores were compiled prospectively and compared two years after the surgery. RESULTS: The Kujala patellofemoral functional scores and the KOOS-PF showed considerable improvement with a differential of +37.5 points ± 20.4 and +42.7 points ± 19.3 (p < .01) respectively. The average Merchant's congruence angle went from 8.8° laterally to 3.6° medially, resulting in medialization of the patella, with a significant difference (p < .01). Based on the specific clinical analysis of the patellar joint, preoperative J-sign was identified in 26.7% of patients (n = 4) and was not found during postoperative examination (p = .1). Preoperative apprehension test was identified in 33.3% of patients (n = 5) against 13.3% (n = 2) after surgery (p = .39). Preoperative pain extension test was identified in 40% of patients (n = 6) against 20% during postoperative clinical analysis (p = .43). DISCUSSION: Although the threshold of significance for patellofemoral symptoms was not reached, the medial closing-wedge femoral varus osteotomy induces a significant medialization of the patella (Merchant's congruence angle) and improves short-term functional results even with co-existing patellofemoral osteoarthritis. Due to the lack of specificity of the patellofemoral scores, patellofemoral osteoarthritis improvement is difficult to determine on its own, but does not represent a contraindication to FVO. LEVEL OF EVIDENCE: III. Prospective clinical study.

Validity and Reliability of the Indonesian Version of the Kujala Score for Patients With Patellofemoral Pain Syndrome.

BACKGROUND: The Kujala score is a useful diagnostic tool to evaluate patellofemoral pain syndrome (PFPS). However, no validated Indonesian version of the Kujala score has been available. PURPOSE: To develop and validate an Indonesian version of the Kujala score. STUDY DESIGN: Cohort study (diagnosis); Level of evidence, 3. METHODS: This was a cross-sectional study to develop an Indonesian version of the Kujala score by using a forward-backward translation protocol. The resulting questionnaire was given to 51 patients diagnosed with PFPS. The validity of the questionnaire was evaluated by correlating the final score with the Indonesian version of the 36-Item Short Form Health Survey (SF-36). Reliability was measured by evaluating the internal consistency (Cronbach alpha) and test-retest reliability (intraclass correlation coefficient [ICC]). RESULTS: The Indonesian version of the Kujala score had a positive correlation with the physical components of the SF-36. The internal consistency was fairly high (α = .74), and the test-retest reliability was excellent (ICC, 0.996). CONCLUSION: The Indonesian version of the Kujala score was proven to be a valid and reliable tool to diagnose PFPS. Future epidemiological studies could implement this score to find the prevalence of PFPS in Indonesia. Further, ensuing studies could explore the application of this scoring system in posttreatment and postoperative settings.

Patient-Reported Outcome Measures for Patellofemoral Instability: a Critical Review.

PURPOSE OF REVIEW: The purpose of this paper was to review the current psychometric properties of patient-reported outcome measures that are commonly used for patients with patellofemoral instability. This review provides evidence to guide the selection of subjective outcome measures for assessing outcomes in clinical care and research studies. RECENT FINDINGS: At the present time, there are two patient-reported outcome measures that have been designed for, and tested on, large cohorts of patellofemoral instability patients, the Banff Patella Instability Instrument (BPII) and the Norwich Patellar Instability Score (NPI). The BPII is a wholistic quality of life outcome measure and the NPI is a symptom score. The use of disease-specific outcome measures such as the BPII and NPI, in combination with generic knee, functional activity, and/or psychological outcome measures that have been proven to be valid and reliable for the patellofemoral instability population, is most likely to provide a well-rounded evaluation of treatment outcomes.

Validation of the German version of the Kujala score in patients with patellofemoral instability: a prospective multi-centre study.

INTRODUCTION: The Kujala score is the most frequently used questionnaire for patellofemoral disorders like pain, instability or osteoarthritis. Unfortunately, we are not aware of a validated German version of the Kujala score. The aim of our study was the translation and linguistic validation of the Kujala score in German-speaking patients with patella instability and the assessment of its measurement characteristics. MATERIALS AND METHODS: The German Kujala score was developed in several steps of translation. In addition to healthy controls, the Kujala German was assessed in consecutive patients undergoing reconstruction of the medial patellofemoral ligament for recurrent patellar dislocations. Pre-op, 6 and 12 months postop the patients completed the Kujala German score, the KOOS, the Lysholm score, a VAS Pain, and the SF-12v2 scores. In addition, there was a Kujala German Score retest preop after a 1-week interval. RESULTS: We found high reliability in terms of internal consistency for the Kujala score (Cronbach's alpha = 0.87). Convergent validity with the KOOS (symptom r = 0.65, pain r = 0.78, ADL r = 0.74, sports/recreation r = 0.84, quality of life r = 0.70), the Lysholm score (r = 0.88) and the SF-12 physical component summary score (r = 0.79) and VAS pain (r = - 0.71) was also very high. Discriminant validity in terms of correlation with the SF-12 mental component summary Score was satisfactory (r = 0.14). CONCLUSIONS: In conclusion, the German version of the Kujala score proved to be a reliable and valid instrument in the setting of a typical patellofemoral disease treated with a standard patellofemoral procedure.

Comparison of hamstring and patellar tendon grafts in anterior cruciate ligament reconstruction: A prospective randomized study.

Objective This prospective randomized study was performed to compare the outcomes of two operative methods of anterior cruciate ligament (ACL) reconstruction based on either bone-patellar tendon-bone (BTB) grafts or hamstring tendon (HT) grafts. Methods Among 100 patients, 96 completed the full follow-up period and were included in the final analysis (48 in the BTB group and 48 in the HT group). The patients were evaluated preoperatively and 1, 3, 6, and 12 months after ACL reconstruction. The Kujala score, Tegner score, and Knee injury and Osteoarthritis Outcome Score (KOOS) were among the parameters used to evaluate the patients. Results Both groups were comparable in terms of sex, age, and body mass index. None of the analyzed scores were significantly different between the BTB and HT groups at either the initial or last visit. Both groups demonstrated improvement at the 12-year follow-up according to the Kujala score and most categories of the KOOS. The Tegner activity level score showed significant improvement in the HT but not BTB group. Conclusion Patients undergoing ACL reconstruction with BTB and HT grafts show comparable improvement in functional results after 1 year of rehabilitation.

Validación de la escala de Kujala para dolor patelofemoral en su versión en español / Validation of the Spanish version of the Kujala patellofemoral pain score

Resumen Introducción: La escala de Kujala para dolor patelofemoral es una herramienta de medición desarrollada en inglés para evaluar la calidad de vida de quienes sufren este tipo de dolor. El propósito de este estudio fue rea-tizar una adaptación cultural de esta escala al español y evaluar su reproducibilidad y validez en pacientes colombianos con dolor patelofemoral. Materiales y métodos: Basándose en las guías de la literatura se tradujo la escala de Kujala al español. Se les pidió a cuarenta pacientes con síndrome de dolor patelofemoral que completaran el cuestionario. Para evaluar la contabilidad se desarrolló por segunda vez la medición a los mismos pacientes en un periodo no mayor a 14 días. Se calculó el alfa de Cronbach (AC) y el coeficiente de correlación intraclase (CCI) para calcular la consistencia interna y la confiabilidad test-retest. El gráfico de Bland-Altman y el coeficiente de repetibilidad se usaron para determinar el error de medición. Resultados: El alfa de Cronbach fue de 0,86 y el coeficiente de correlación intraclase fue 0,97. El gráfico de Bland-Altman no mostró errores sistemáticos y el coeficiente de repetibilidad fue de 7,6 %. Conclusión: La versión en español de la escala de Kujala es una herramienta válida y confiable para evaluar calidad de vida en pacientes con dolor patelofemoral y puede ser usada en países latinoamericanos de habla hispana como Colombia.

Abstract Introduction: The Kujala patellofemoral pain scale is an assessment tool developed to evaluate the quality of life in patients with this syndrome. The aim of this study is to adapt the Kujala scale to Spanish for Latin America and to evaluate its reproducibility and validity in patients with patellofemoral pain in Colombia. Methods: Following guidelines from literature, the Kujala scale was translated to Spanish. 40 patients with patellofemoral pain were asked to complete the questionnaire. They were asked to answer it for a second time within the next 14 days to assess reliability. Cronbach's alpha (CA) and intra-class correlation coefficient (ICC) were calculated to determine internal consistency and test-retest reliability. Bland-Altman plot and repeatability coefficient were calculated to determine the measurement error. Results: The Cronbach's alpha was 0.86 and the ICC was 0.97. The Bland-Altmanplot showed no systematic differences, and the repeatability coefficient was 7,6 %. Discussion: This Spanish version of the Kujala scale is a valid and reliable tool for evaluating quality of life in patients with patellofemoral pain and may be used in Spanish speaking countries of Latin America such as Colombia.

Patient-based outcomes after medial patellofemoral ligament reconstruction.

PURPOSE: The purpose of this study was to evaluate subjective outcomes after medial patellofemoral ligament (MPFL) reconstructions. METHODS: Fifty-four knees of 46 patients who received MPFL reconstruction for recurrent patellar dislocations were examined with a minimum follow-up of two years. To assess patient-based outcomes, the Knee Injury and Osteoarthritis Outcome Score (KOOS) and the Kujala score were assessed. RESULTS: The mean Kujala score was significantly improved from 64.6 ± 22.1 pre-operatively to 84.7 ± 11.8 post-operatively (P < 0.001). The mean KOOS was also significantly improved post-operatively in all five subscales. Further, the mean scores of 41 out of the 42 questions for the KOOS were significantly improved after surgery, except those of the question about "grinding and clicking". When the KOOS was assessed individually, the scores on one or more subscales out of the five were worsened post-operatively in eight patients, and seven of the eight patients had decreased post-operative pain subscale scores. Furthermore, those eight patients (worse group) were compared with patients without any worsened scores on any of the subscales (better group). The mean pre-operative pain and sports/recreation function subscale scores were significantly higher in the worse group whereas the mean post-operative pain and symptoms subscale scores were significantly lower in the worse group than in the better group. CONCLUSIONS: Overall, satisfactory patient-based outcomes were obtained after MPFL reconstruction in most of the patients. However, patients who only have mild pain pre-operatively tend to have worse subjective outcomes, and a caution may be needed when performing MPFL reconstruction on these patients.

An evaluation of the effectiveness of medial patellofemoral ligament reconstruction using an anatomical tunnel site.

PURPOSE: Medial patellofemoral ligament (MPFL) reconstruction for recurrent patellar instability has gained popularity, and anatomical and biomechanical studies have recently altered our operative techniques. The aim of this study was to report the clinical outcome of this new anatomical MPFL reconstructive technique and investigate whether correlating factors could be identified. METHODS: Between 2009 and 2012, a total of 31 consecutive patients underwent MPFL reconstruction using an autologous gracilis graft and anatomical tunnel placement. Pre- and post-operative data were collected as a part of routine clinical practice. The preoperative assessment included a rotational profile CT scan of the lower extremity according to the Lyon protocol with TT-TG distance measurement. Outcomes were evaluated with the Kujala and Norwich patella instability (NPI) scores preoperatively and at follow-up (1.5-5.1 years). RESULTS: A significant improvement in both the Kujala (p < 0.001) and NPI (p = 0.012) scores was recorded. A medium and large negative correlations were found between TT-TG distance and Kujala score improvement (ρ = -0.48, p = 0.020) and NPI score improvement (ρ = -0.83, p = 0.042), respectively. Multiple regression analysis identified TT-TG distance, Beighton score and BMI as factors explaining the variance of Kujala score improvement. CONCLUSION: Anatomical MPFL reconstruction with the gracilis autograft for patellar instability resulted in good outcome. This underlines the importance of anatomical tunnel placement in MPFL reconstruction. With a precise preoperative work-up, factors can be identified that may guide selecting the optimal operative strategy and improve counselling of the patient. LEVEL OF EVIDENCE: Case series, Level IV.

Habitual patellar dislocation in children: Results of surgical treatment by modified four in one technique.

BACKGROUND: Habitual patellar dislocation is a rare condition affecting children. The growth plates are open in children and any surgical intervention should take that in to consideration. We are describing a modified four in one technique for habitual patellar dislocation, which is a soft tissue procedure without the use of any implant. METHOD: In this study we included 6 children (4 females and 2 males) with open growth plates, which were diagnosed with habitual patellar dislocation. The average age of the patients were 9.6 years (range 5-13 years). Our technique included lateral retinaculum release, vastus medialis obliques (VMO) advancement, partial patellar tendon transposition and reconstruction of medial patellofemoral ligament (MPFL). Patients were evaluated with Kujala scoring pre and post operatively. The average follow up period was 12 months (range 7-24 months). RESULTS: There were no recurrence of patellar instability in any of the cases. The mean Kujala score was 48 before surgery and it improved to 95 after 12 months of average follow-up after surgery. CONCLUSION: We conclude that our method of treatment of habitual patellar dislocation by using modified four in one technique in children with open physis reproduced excellent functional outcome. It is simple, cheap and does not require any image guidance. THERAPEUTIC STUDY: Level of evidence IV.

Concurrent Validation of the Banff Patella Instability Instrument to the Norwich Patellar Instability Score and the Kujala Score in Patients With Patellofemoral Instability.

BACKGROUND: The Banff Patella Instability Instrument (BPII) is a disease-specific, patient-reported, quality-of-life outcome measure designed to assess patients with patellofemoral instability. The iterative assessment of the validity, reliability, and responsiveness of a health-related patient-reported outcome measure is vital to the development of a high-quality evaluation tool. PURPOSE: To assess the concurrent validity of the BPII to the Norwich Patellar Instability (NPI) score and the Kujala score. STUDY DESIGN: Cohort study; Level of evidence, 2. METHODS: A total of 74 patients with a confirmed diagnosis of recurrent patellofemoral instability completed the BPII, NPI, and Kujala scores at the initial orthopaedic consultation. A Pearson r correlation coefficient was computed to determine the relationship between each of these patient-reported outcomes. RESULTS: There were statistically significant correlations between the BPII and the NPI score (r = -0.53; P < .001) as well as the BPII and the Kujala score (r = 0.50; P < .001). CONCLUSION: This study demonstrated a moderately strong correlation of the BPII to other outcome measures used to evaluate patients with patellofemoral instability. This study adds further validity to the BPII in accordance with the COSMIN (COnsensus-based Standards for the selection of health Measurement INstruments) guidelines.