Medial Open-wedge Osteotomy Research Articles

Pes varus correction in dachshunds with mini hybrid external skeletal fixators.

To evaluate the clinical and radiographic outcome of pes varus deformity correction in dachshunds managed with acute medial opening wedge osteotomy of the distal tibia and stabilised with a mini hybrid external skeletal fixator (HESF). Surgical correction involved a transverse osteotomy over the premeasured location at the distal tibia and application of a IMEX mini HESF. All corrections were evaluated using centre of rotation and angulation methodology. Medical records and radiographies of 20 dachshunds (28 pes varus corrections) were reviewed. All osteotomies healed and fixators were removed between 6 and 12 weeks. Lameness resolved in 18 dachshunds (90%) and significantly improved in two dachshunds (10%). Lateral patella luxation (LPL) was detected in 11/28 (39.2%) of the involved pelvic limbs, all of which resolved following pes varus correction. Mean frontal plane alignment (FPA) of the normal and abnormal tibiae were 12.3° valgus (range: 4°-18°) and 25° Varus (range: 16°-41°) respectively. Angular correction ranged between 30° and 50° (Mean: 39°) and the mean post-operative FPA was 13° valgus (range: 5°-21°). Pes varus deformity in dachshunds can be corrected by medial opening wedge osteotomy of the distal tibia stabilised by HESF. Single-session bilateral pes varus corrections can also be performed with minimal morbidity. LPL was commonly detected in dogs with pes varus deformity and all resolved spontaneously following pes varus correction alone.

Anterior Proximal-to-Posterior Distal Oblique Proximal Tibial Osteotomy

High tibial osteotomy is a common procedure to address unicompartment knee osteoarthritis and other conditions. Regarding the specific surgical methods, medial open wedge osteotomy and lateral close wedge osteotomy are the most used. Both methods have a common disadvantage in that they are not so suitable to correct a severe deformity. Thus, we would like to introduce an anterior proximal-to-posterior distal oblique proximal tibial osteotomy technique, which is especially suitable to correct severe tibial deformity. The most critical point of this technique is to create an osteotomy plane from the most proximal posterior site of the tibial tubercle posteriorly and distally to the posterior cortex of the tibia, with each horizontal osteotomy maneuver in the coronal plane. Combined fibular osteotomy is always needed, and better results can be obtained when it is combined with arthroscopic debridement of the knee. We consider the introduction of this technique will provide a useful option when tibial osteotomy is needed to preserve the knee, especially for a great deformity correction.

Good clinical outcomes and return to sports after hybrid closed-wedge high tibial osteotomy.

This study aimed to investigate preoperative sports participation and postoperative clinical outcomes including a return to sports (RTS) after hybrid closed-wedge high tibial osteotomy (CWHTO) for medial compartment osteoarthritis of the knee. Characteristic of Hybrid CWHTO was defined as extra-articular lateral closed and medial open wedge osteotomy. The patients who underwent hybrid CWHTO from January 2016 to December 2018 were retrospectively reviewed and divided them into sports and non-sports groups. The preoperative demographic and radiographic characteristics were compared in both groups. And the clinical outcomes including the Japanese Orthopaedic Association (JOA) score, visual analogue scale (VAS), Lysholm score, University of California at Los Angeles (UCLA) activity score, and RTS in the sports group were also investigated. Statistical analysis was performed for comparisons among the preoperative factors between the two groups. Influence of sports impact and bone union of fibular osteotomy was also statistically investigated for RTS. Of the 161 knees (129 patients; 46 males, 83 females), 20 knees (16 patients; 13 males, 3 females; 12.3%) belonged to sports group. Although there were no significant differences regarding the age and radiographic parameters, there were significant differences in the body mass index and proportion of males between both groups. The JOA, VAS, Lysholm, and UCLA activity scores significantly improved after surgery. RTS was 80% at a mean duration of 7.2 ± 3.1months. RTS in the high-impact sports group was significantly lower than that in the low-impact sports group (high-impact 60% vs. low-impact 100%, p = 0.043). There was no significant difference in RTS regarding bone union after fibular osteotomy. The clinical outcomes including RTS were satisfactory in patients with hybrid CWHTO. IV.

A prospective observational study to assess the functional and radiological outcomes of high tibial osteotomy in medial compartment osteoarthritis in younger population

Introduction: Medial compartment osteoarthritis is a common entity leading to significant morbidity in geriatric population. High tibial osteotomy is a time tested knee preserving operation. The fixation methods vary from internal fixation like plates and screws, to external fixators like dynamic uniaxial fixators and Ilizarov.In this study we have analysed the outcomes of medial opening wedge osteotomy using a unilateral dynamic external fixator (Orthofix) using the principle of hemi-callostasis.Method: We conducted a prospective cohort study involving 20 patients with medical compartment osteoarthritis. Medial HTO was performed using OrthofixTM external fixator in 20 patients (20 knees) and were followed up between January 2019 to February 2021.Functional and radiological outcomes were assessed using the KSS and KOOS scores and the alignment xrays respectively.Results: Out of 20 patients included in the study, the majority (18) were females the mean age in the group was 50.75 years (+6.06years) at time of surgery. The involvement of right knee was seen in 12 patients and left knee was involved in 8 patients. The average improvement in th HKA was 13+1.2 degrees. The Average corrected HKA was 183.05+4.2 degrees. There was significant improvement in the mean KSS score at 2years, from (44.15 ± 6.13) pre-operatively to (86.15 ± 6.41) post-operatively and was statistically significant (p

Tibial Slope Can Be Maintained During Medial Opening-Wedge Proximal Tibial Osteotomy With Sagittally Oriented Hinge, Posterior Plate Position, and Knee Hyperextension: A Cadaveric Study

The purpose of this study is (1) to determine if, when optimizing modern techniques, medial opening-wedge osteotomies can effectively maintain tibial slope and (2) to determine how different magnitude coronal plane corrections affect tibial slope. Proximal tibial osteotomies (PTOs) were performed on 10 fresh-frozen cadaveric knees leaving a consistent lateral hinge, using either a 5-mm or a 10-mm trapezoidal wedged osteotomy plate. Techniques including posterior plate placement; a trapezoidal, sloped plate; and knee hyperextension were used during plate fixation to help close the anterior osteotomy gap. Medial coronal proximal tibia angle and posterior tibial slope were measured preosteotomy, after a 5-mm implant, and after a 10-mm implant using true anteroposterior and lateral fluoroscopic images. Three independent observers performed all radiographic measurements, and intraclass correlation coefficients were calculated. The 5-mm and 10-mm osteotomy plates increased the coronal medial proximal tibia angle by a mean of 3.4° (range, 3.0°-3.7°) and 7.3° (range, 6.7°-7.7°), respectively. The 5-mm and 10-mm trapezoidal wedged osteotomy plates decreased the posterior tibial slope by a mean of 0.9° (range, 0.5°-1.2°) and 0.3° (range, 0°-0.6°), respectively. Intraobserver reliability was found to be high for both the coronal medial proximal tibia angle (intraclass correlation coefficient [ICC]= 0.897 [0.821-0.946]) and the tibial slope measurements (ICC= 0.761 [0.672-0.826]). When optimizing the medial opening-wedge proximal tibial osteotomy, including utilization of a sagittally oriented hinge, placement of a trapezoidal plate posteriorly, and fixation with knee hyperextension, posterior tibial slope can be maintained regardless of the degree of coronal correction. Tibial slope has a significant effect on cruciate ligament stress and a better understanding of coronal plane correction, and its effect on tibial slope is critical when performing proximal tibia osteotomies.

STUDY TO EVALUATE THE ROLE OF HIGH TIBIAL OSTEOTOMY (HTO) FIXED WITH ANGLE STABLE PLATE IN TREATMENT OF OSTEOARTHRITIS OF KNEE AT NMCH, ROHTAS, BIHAR

Background: Osteoarthritis is more common in females. It is because osteoarthritis in post-menopausal women is associated with higher body weight, higher subcutaneous fat, calcium deficiency and weaker muscles linked to hormonal changes. The purpose of this study was to evaluate the role of high tibial osteotomy fixed with angle stable plate in treatment of osteoarthritis of knee. Material and Methods: In our study 10 cases were operated by modified coventry technique, 10 cases were operated by open wedge osteotomy with non locking plates and bone graft and 104 cases were operated by medial open wedge osteotomy and iliac graft secured by locking plate. In these cases full weight bearing was allowed at 8 week, 6 week and 3rd post operative day respectively. Radiographical analysis include post operatively change in tibio-femoral angle. Mean follow up of these cases was 2 year. Results: In our study thee knee pain and function score were significantly improved (p value <0.001). The average pain score preoperatively was 1 8± 7(the maximum pain score for pain is 50) and post-operatively was 44±5. According to the grading used for functional assessment in knee scores there was definite improvement in the function of cases 122 (98.38%) at 2 yrs. The preoperatively mean functional knee score in of 110 cases (88.7%) cases was 28.86 (the maximum functional knee score is 100) and postoperatively was 70.45. There is correction in tibiofemoral angle (mean preoperative and postoperative tibiofemoral angle was 5.2±1.5 degrees varus and 5.8±1.3 degrees valgus respectively). Conclusion: There was definite improvement in the pain and function of the knee after the correction of the deformity (P value <0.001). The results of high tibial osteotomy in 88.23 percentage knees were rated as excellent. 104 out of these 124 cases were fix by locking plates. 2 cases had poor results due to excessive over correction and associated comorbidities. There is a definite correlation between the postoperative valgus obtained and relief in the pain.

The Radiographic Support for Distal Tibia Medial Opening-Wedge Osteotomy with Fibular Valgization Osteotomy for Medial Ankle Osteoarthritis

Category:Ankle; Ankle ArthritisIntroduction/Purpose:Supramalleolar osteotomy (SMO) has recently been accepted as the major surgical option for treating painful asymmetric ankle arthritis. The effectivenss of additional fibular valgization osteotomy during SMO procedure is still controversial. This study aimed to evaluate radiological and clinical outcomes of medial compartment ankle osteoarthritis (OA) after SMO with fibular valgization osteotomy. Also, the study is aimed to describe the radiographic support for the SMO with additional fibular osteotomy in relieving the medial ankle pain.Methods:The study is based on 45 cases of medial compartment ankle arthritis (43 patients) with moderate to severe medial ankle pain (at least 1-year follow-up). SMO and fibular valgization oblique osteotomy was performed concomitantly in 37 ankles (82.2%). As for the functional evaluation, visual analogue scale (VAS) pain scores, American Orthopaedic Foot & Ankle Society (AOFAS) ankle-hindfoot scores and patient satisfaction were evaluated. On radiographs, tibial anterior surface angles (TAS), tibial lateral surface angles (TLS), and talar tilt angles (TT) were measured and the severity of ankle OA was classified by the Takakura stage. The evaluation of the effect of fibular valgization osteotomy entailed a comparison of new radiological measurement (medial clear space gap distance and talus center migaration distance) between two groups: Group 1 (with 37 cases of SMO with fibular valgization osteotomy) and Group 2 (with 8 cases of SMO without fibular valgization osteotomy).Results:The mean VAS pain score decreased from preoperative 6.5 to postoperative 1.3, and AOFAS score significantly improved from preoperative 60.4 to 88.3 at final follow-up. 91 percent (41 ankles) of the patients were satisfied with surgery. Mean TAS improved from preoperative 83.8° to postoperative 94.9° and TLS from 78.5° to 82.0°. 23 of 30 Takakura stage IIIa cases (77%) and 3 of 7 stage IIIb cases (42%) improved to stage II after SMO at final follow-up. Mean fibular valgization osteotomy angle was 12.4°. Medial gutter space gap distance improved from preoperative 0.7mm to postoperative 2.10mm. Talus center migration distance improved from -0.53mm to 2.03mm. Both radiologic parameters showed statistically significant differences between two groups, but there was no correlation between radiologic parameters and clinical outcomes.Conclusion:SMO for the patients with painful medial compartment ankle OA achieved favorable clinical and radiological outcomes. Also, high patient satisfaction (91%) as well as the improvement of Takakura stage was observed. SMO with additional fibular valgization osteotomy yielded widening of medial gutter space and recovery of talus center. Therefore, additional fibular valgization osteotomy during SMO could be optimal surgical option for the recovery of normal ankle mechanical axis.

Consensus on Indications for Medial Cuneiform Opening Wedge (Cotton) Osteotomy in the Treatment of Progressive Collapsing Foot Deformity.

Forefoot varus is a physical and radiographic examination finding associated with the Progressive Collapsing Foot Deformity (PCFD). Varus position of the forefoot relative to the hindfoot is caused by medial midfoot collapse with apex plantar angulation of the medial column. Some surgeons use the term forefoot supination to describe this same deformity (see Introduction section with nomenclature). Correction of this deformity is important to restore the weightbearing tripod of the foot and help resist a recurrence of foot collapse. When the forefoot varus deformity is isolated to the medial metatarsal and medial cuneiform, correction is indicated with an opening wedge medial cuneiform (Cotton) osteotomy, typically with interposition of an allograft bone wedge from 5 to 11 mm in width at the base. When the forefoot varus is global, involving varus angulation of the entire forefoot and midfoot relative to the hindfoot, other procedures are needed to adequately correct the deformity. Level V, consensus, expert opinion.

The influence of High tibial osteotomies on the posterior tibial slope - Study of 190 medial open wedge and 89 lateral closed wedge cases

Aims and Objectives:High tibial osteotomies (HTO) are nowadays an established method to treat unicompartmental, medial gonarthrosis. Common surgical HTO techniques include medial open wedge (MOW) and lateral closed wedge osteotomies (LCW). In addition to the intended change in the frontal plane these surgical techniques take influence on various other biomechanical issues of the knee joint e.g. the posterior tibial slope (PTS). Aim of this study was to rate and evaluate changes of the tibial slope by HTOs dependent on the used surgical technique (MOW versus LCW).Materials and Methods:414 HTOs, that had been performed in our institution between 2004 and November 2018, were reviewed retrospectively. 135 cases were excluded. The included 279 cases from 247 patients were divided into two groups dependent on the used surgical technique (MOW/LCW). In both groups the values of PTS were defined by measuring the proximal posterior tibia angle (PPTA) on lateral x-rays of the knee from before and 4 to 6 weeks after surgery. The change of PTS was evaluated as delta-PPTA. Microsoft Excel was used for statistical analysis.Results:279 cases were included: 190 were assigned to the group of MOW and 89 to the group of LCW osteotomies. Considering demographic data the MOW-group showed a gender distribution of 124 men/ 46 women in 93 left and 97 right knees, and the LCW-group of 46 men/43 women in 40 left and 49 right knees. The mean value of age in the MOW group was 47,6 +/- 10 years (15-70 years) and in the LCW-group 40,6+/-13,7 years (15-67 years). Before surgery there was no statistical significant difference in the PPTA-values between both groups (p=0,720): The mean PPTA in the MOW-group measured 79,9°+/-3,2° (68-88°), in the LCW-group 80,6°+/-2,6° (74-88°). The change caused by surgery showed no statistical significance in the MOW-group (delta-PPTA 0,07°+/- 2,9° [-12° bis 11°]). However, in the LCW-Gruppe we observed a significant (p<0,001) decrease of the PTS (delta-PPTA -3,09°+/- 4,5° [-12°bis 5°]). Nevertheless, the analysis of delta-PPTA in the LCW-group over the timeline of the study period showed tendencies of a decline of slope-reduction.Conclusion:As the PTS plays a relevant role in biomechanics of the knee joint a consideration of the impact of changes in PTS by HTOs is indispensable. Our results support the common thesis of a slope-reduction by LCW osteotomies but nevertheless the analysis throughout the study period showed a reduction of the slope-decrease over timeline. The common thesis of a slope-increase by MOW osteotomies was not supported by our results which showed no significant change.

Tibial and femoral osteotomies in varus deformities - radiological and clinical outcome

BackgroundVarus deformities of the knee are frequently corrected by osteotomies, which should be performed at the level of origin. But in contrast to high tibial osteotomies (HTO), little data exists for distal femoral osteotomies (DFO).This study evaluates radiological and clinical outcomes after valgisation osteotomies in the proximal tibia and distal femur.MethodsWe used an observational cohort study design and prospectively performed preoperative long standing radiographs (LSR), lateral x-rays and clinical questionnaires (SF-36, Lysholm score, VAS). Postoperative LSR and lateral x-rays were obtained on average 18 months postoperative and postoperative clinical questionnaires at final visit (mean follow up 46 months). A subgroup analysis of the different surgical techniques (oHTO vs. cDFO) was performed, with regards to radiological and clinical outcomes.ResultsFinally 28 osteotomies with medial tibial opening (oHTO) or lateral femoral closing (cDFO) wedge osteotomies in 25 consecutive patients (mean age 40 years) were identified. There were 17 tibal and 11 femoral procedures. All osteotomies were performed at the origin of deformity, which was of different etiology. The average deviation of the final HKA compared to the preoperative planning was 2.4° ± 0.4°. Overall, there was a significant improvement in all clinical scores (SF-36: 61.8 to 79.4, p < 0.001; Lysholm-score: 72.7 to 90.4, p < 0.001; VAS: 3 to 1, p < 0.001). There was no significant correlation between surgical accuracy and outcome scores.ConclusionValgisation osteotomies lead to a significant improvement in all clinical scores with the demonstrated treatment protocol. An appreciable proportion of varus deformities are of femoral origin. Since cDFO provides comparable radiological and clinical results as oHTO, this is an important treatment option for varus deformities of femoral origin.

Combined posterior cruciate ligament and chronic posterolateral corner deficiency in varus knee, two-stage reconstruction

Background Conservative management of chronic posterolateral corner (PLC) knee injuries had a bad repetition and often followed by poor outcomes. In patients who had associated posterior cruciate ligament [PCL] and chronic PLC knee injuries with varus knee deformity, failure to correct the mechanical axis by correcting varus was usually followed by failure of the posterolateral knee repair or reconstruction. Aim of the study To assess prospectively the results of treatment of associated PCL and chronic PLC injury in the varus knee, with a two-stage procedure. Initial high tibial medial opening wedge osteotomy was followed by PCL reconstruction. Methods This study included 10 patients who had associated PCL and chronic PLC deficiency in varus knee who were treated by two-stage surgical technique, first stage was high tibial medial opening wedge osteotomy to align the mechanical axis and correct varus deformity, then PCL ligament reconstruction in the second stage. Results According to the International Knee Documentation Committee, the 10 patients included in the study [100%] were graded as grade C (abnormal) or D (sever abnormal) preoperatively, while 8 of the 10 patients [80%] were graded as grade A (normal) or B (nearly normal), and 2 patients [20%] were rated as abnormal grade C at final follow-up scoring. Statistically significant improvement was achieved. Radiologically, the average mechanical axis that preoperatively passed within the medial tibial plateau with varus deformity ranged between 10 and 15° in our cases, while the mechanical axis postoperatively passed through the mid of tibial plateau or slightly within the lateral tibial plateau with full correction of the deformity with valgus angle ranged from 5 to 10°. The preoperative posterior tibial sagittal slope angle was average 7.8°, which became 10.5° in the last follow-up visit. Conclusion Two-stage reconstruction of the knee in cases who had PLC injuries associated with varus knee, starting by proximal tibial medial opening wedge osteotomy followed by reconstruction of PCL, is a valuable technique and had good results.

A protective hinge wire, intersecting the osteotomy plane, can reduce the occurrence of perioperative hinge fractures in medial opening wedge osteotomy.

A recent study reported that positioning a K-wire to intersect the cutting plane at the theoretical lateral hinge location increases the lateral hinge's resistance to fracture during the opening of opening wedge high tibial osteotomy (OWHTO). The purpose of this study was to evaluate the clinical relevance of the use of this K-wire and its benefits in terms of lateral hinge protection during OWHTO in daily practice. A retrospective comparative study identified 206 patients who underwent OWHTO from January 2014 to December 2017. Among these patients, 71 had an additional K-wire (HK + group), whereas 135 did not (HK- group). The subjects meeting the inclusion criteria were included in a matched pairing process, which identified 60 patients in the HK + group and 60 patients in the HK- group. Mean follow-up time was 2.3 ± 1.0years (range 2-4.2). Radiographic outcomes were evaluated with intraoperative and postoperative fluoroscopic imaging and with CT imaging at 6weeks post OWHTO surgery. The knee osteoarthritis outcomes score (KOOS) was used and time needed to return to work and any kind of sports was collected. Thirty six patients (30%) were found to have a LHF. Among these patients, 26 (72%) did not have an additional K-wire positioned at their theoretical lateral hinge location (HK- group) during the procedure. LHF rate for patients without additional K-wire group (HK-) was 43.3%, whereas it was 16.7% for the patients with an additional K-wire (HK +) [Odd ratio 3.8 95% CI 1.6-8.3; p = 0.005]. The mean time to return to work, return to any kind of sports, and bone union was significantly shorter for HK + group (p < 0.05). This study demonstrated that during OWHTO, positioning a K-wire intersecting the cutting plane at the theoretical lateral hinge location reduced the number of intraoperative lateral hinge fractures. III retrospective case-control study.

Erratum to: Medial open wedge osteotomy for correction of valgus deformity

Erratum zu: Knie J. 2019 https://doi.org/10.1007/s43205-019-00019-x Bei diesem Beitrag ist der Beitragstitel versehentlich nicht richtig angegeben. Deutscher und englischer Beitragstitel lauten korrekt: Die medial offnende Osteotomie zur Korrektur des Genu varum Medial open wedge osteotomy for …

Improved clinical outcome after medial open-wedge osteotomy despite cartilage lesions in the lateral compartment

High tibial medial open-wedge osteotomy (HTO) is an established treatment option for cartilage lesions in the medial compartment. It was this study’s aim to evaluate the effect of asymptomatic single or kissing lesions in the lateral compartment on functional outcome after medial open-wedge osteotomy. A total of 156 patients were enrolled in this retrospective study. All patients underwent HTO due to a varus deformity and a symptomatic cartilage lesion or osteoarthritis in the medial compartment. We acquired preoperative Lysholm and VAS Scores. Each open-wedge osteotomy was preceded by diagnostic arthroscopy to ensure the compartments were thoroughly documented and diagnosed. Cartilage lesions in the lateral compartment were evaluated, and three groups created according to their individual characteristics: group A (no cartilage lesion, n = 119), group B (single cartilage lesion, n = 16) and group C (kissing lesions, n = 21). Cartilage lesions were graded according to the Outerbridge classification, The functional postoperative outcome was determined by relying on several parameters (VAS Score, Lysholm, KOOS, WOMAC Score). Pre- and postoperative long-leg axis views were analyzed via special planning software (mediCAD, Hectec GmbH Germany). Mean follow-up was at 69.0 ± 30.3 months after surgery (range 22 to 121 months). There were no significant differences between the three groups in the correction angle chosen (p = 0.16). Regarding the outcome parameters, group A attained the best results in the WOMACpain Score (p = 0.03) and WOMACfunction Score (p = 0.05). A higher Outerbridge-Score of cartilage lesions in the lateral compartment was associated with a higher (i.e., worse) WOMACpain Score (p = 0.018) and WOMACfunction Score (p = 0.033). In all the groups (A, B, and C), HTO led to a significant improvement in the Lysholm Score (p < 0.001) and to a decrease in pain level (VAS Score; p < 0.001). Conclusion: Valgus high tibial osteotomy leads to reduced pain and improved functional outcome scores, even in patients with pre-existing asymptomatic single or corresponding cartilage lesions in the lateral compartment. In case of severe cartilage lesions in the lateral compartment, surgeons should consider that clinical outcome worsens depending on the Outerbridge Score.

The Biplanar Effect of the Medial Cuneiform Osteotomy

Background. The "foot-CORA" (center of rotation of angulation) method confirms the medial cuneiform as the site of deformity in most forefoot/midfoot deformities and is therefore the ideal location to correct those deformities. It has been consistently observed intraoperatively by the senior author that there is a secondary, unintentional deformity created in the transverse plane when dorsiflexion and plantar flexion osteotomies of the medial cuneiform are performed to correct pronation and supination forefoot deformities, respectively. These effects may not be desirable. This biplanar effect of medial cuneiform osteotomies has been observed but not studied. The purpose of this study was to perform the 4 commonly used medial cuneiform osteotomy techniques on cadaveric feet to demonstrate their biplanar effects. Methods. Four formaldehyde preserved cadaveric feet were used to perform 4 techniques of medial cuneiform osteotomy: dorsiflexion plantar-based opening wedge, plantar flexion dorsal-based opening wedge, dorsiflexion dorsal-based closing wedge, and plantar flexion plantar-based closing wedge. Photographs and fluoroscopy were used to assess the angular changes in the sagittal and transverse planes. Angular measurements were made using OsiriX software on fluoroscopic images. Results. The medial cuneiform opening wedge osteotomies produced midfoot abduction in addition to the desired dorsiflexion and plantar flexion. The medial cuneiform closing wedge osteotomies produced midfoot adduction in addition to the desired dorsiflexion and plantar flexion. Conclusion. We confirm that intentional sagittal uniplanar osteotomies of the medial cuneiform create obligate biplanar effects. This is likely a result of tethering by ligaments and the joint capsules on the lateral border of the medial cuneiform. The obligate transverse plane effect can be used to one's advantage or result in an undesired effect if not considered during surgical planning and execution. We propose a simple treatment algorithm for selecting the appropriate medial cuneiform osteotomy for forefoot/midfoot deformities. Levels of Evidence: Level V.

Retaining the medial collateral ligament in high tibial medial open-wedge osteotomy mostly results in post-operative intra-articular gap reduction.

The current study aimed to evaluate how open-wedge high tibial osteotomy (OWHTO) without the release of medial collateral ligament (MCL) changes in vivo intra-articular joint space after the surgery. Patients with varus malalignment of the knee with an indication for OWHTO were included in this study. The intra-articular gap was measured before and 30min after OWHTO without MCL release using a series of calibrated nerve hooks. The association of post-operative gap size with varus angle, medial proximal tibial angle (MPTA), lateral distal femoral angle (LDFA) and joint line convergence angle (JLCA) was also assessed. A total of 42 knees from 38 patients were evaluated. The mean size of the intra-articular gap of the medial compartment was 5.2 ± 1mm before the osteotomy and 3.1 ± 2.2mm at 30min post-osteotomy. The size of the intra-articular gap decreased post-operatively in 30 knees (71.5%), increased in eight knees (19%) and remained the same in the remaining four knees (9.5%). Smaller MPTA and more correction were associated with a decrease in gap size after the osteotomy (p = 0.01 and p = 0.03, respectively). A significant negative correlation was observed between the correction size and the gap size after osteotomy (r = - 0.317, p = 0.04). Intra-articular pressure of the medial compartment increases in the majority of cases following OWHTO without MCL release. Until the factors affecting this increased pressure are thoroughly identified, MCL release seems to be a wiser option during OWHTO. III.

A prospective study on functional outcome in high tibial medial open wedge osteotomy in medial compartmental osteoarthritis of knee

Osteoarthritis is a degenerative joint disease result from breakdown of joint cartilase and underlying bone. In medial unicompartmental osteoarthritis of knee with varus deformity, a valgus realignment high tibial osteotomy (HTO) is a treatment option in selective active patients. In this study, we evaluated functional outcome in medial open wedge high tibial osteotomy in selected patients. This study was conducted with twenty young active patients with medial compartmental osteoarthritis allocated for medial biplanar open wedge high tibial osteotomy, stabilised with non-locking plate with or without autologous bone grafting or bone graft substitute. All patient assessed pre-operative and post-operative period by Knee society score, VAS score. In our study, range of movement, Knee score, pain score, functional score, over all final result according to knee society score improved that is statistically significant.

Medial Cuneiform Opening Wedge Osteotomy for Correction of Flexible Flatfoot Deformity: Trabecular Titanium vs. Bone Allograft Wedges.

Adult flatfoot is a common pathology characterized by multiplanar deformity involving hindfoot, midfoot, and forefoot. Various surgical techniques have been described for the treatment but may not adequately correct the fixed forefoot varus component. Residual forefoot supination can be addressed by a plantar flexing opening wedge osteotomy of the medial cuneiform, also known as a Cotton osteotomy. Thus, the aims of this study were to compare clinical, radiological, and functional outcome after Cotton osteotomy, in patients treated with bone allograft or metallic implant. Consequently, 36 patients treated with opening wedge osteotomy of the medial cuneiform for forefoot varus were studied retrospectively. Patients were divided into two groups: the bone allograft group (HBG) (n=18) and the metallic implant group with BIOFOAM® Cotton Wedges (TTW) (n=18). Radiographic assessment and clinical scores including American Orthopaedic Foot and Ankle Society score, Foot Function Index, and visual analogue scale for pain were collected before operation and the last follow-up. The difference between baseline and follow-up for both groups was statistically significant for all the clinical scores and radiographic angles (p < 0.05). Most participants (92%) were very satisfied after surgery. Our results showed that Cotton osteotomy with a metallic implant provided both good clinical and radiographic outcomes comparable with bone allograft.

Distal Femoral Medial Opening Wedge Osteotomy for Post-Traumatic, Distal Femoral Varus Deformity.

Restoration of neutral mechanical alignment of the lower limb is an important factor in the treatment of unicompartmental arthrosis. Traditionally, medial opening wedge high tibial osteotomy has been widely performed to correct varus malalignment with unicompartmental arthrosis. However, an ideal indication for the high tibial osteotomy is the knee with metaphyseal tibial varus malalignment. The basic principle of corrective osteotomy is performing an osteotomy at the center of the deformity to prevent abnormal joint line obliquity. If pathologic distal femoral varus deformity is the cause of genu varum, the osteotomy should be performed in the distal femur. Reports of medial opening wedge distal femoral osteotomy (DFO) to correct varus malalignment are rare. We present a case of this very rare and challenging condition in a 47-year-old male, which was successfully treated by medial opening wedge DFO.

Supramalleolar osteotomy for treatment of post-traumatic angular tibial deformities affecting the ankle joint

Background Angular deformities of the leg resulting from malunion of distal tibial fractures or physeal arrest in skeletally immature patients are usually associated with ankle and foot pain secondary to disturbed mechanics and joint overload and could inevitably lead − if uncorrected − to degenerative arthritis. This prospective, case series study aims to evaluate the functional and radiological outcomes of supramalleolar corrective osteotomies for treating symptomatic angular deformities of the tibia and to assess its role in preventing or postponing degenerative arthritis of the ankle joint. Patients and methods This study included 18 patients presented with symptomatic angular tibial deformities secondary to malunion of previous distal tibial fractures or post-traumatic physeal arrest. Twelve patients had varus deformities of the ankle, while six patients had valgus deformities. Partial fibulectomy proximal to the level of the planned osteotomy was initially done in all patients; varus deformities were corrected with medial opening-wedge osteotomy and bone grafting with or without tibial fixation, while valgus deformities were corrected with medial closing-wedge osteotomy fixed by plates and screws. The ankle–hindfoot scale of the American Orthopaedic Foot and Ankle Society was used for evaluating the functional results preoperatively and postoperatively. Results The mean age of the patients at presentation was 17.6±5.9 years (ranged from 10 to 44 years). All the osteotomies united in an average duration of 10±4.8 weeks (ranged from 7 to 15 weeks) with no reported surgery-related complications apart from delayed wound healing in two cases. The deformity was clinically improved in all the 18 patients, while the radiological parameters were satisfactory in 16 patients with statistically significant improvement (P Conclusion Supramalleolar osteotomy is an effective procedure for treating symptomatic angular deformities of the tibia. Supramalleolar osteotomies − not only − correct the deformity and improve the functional outcome, but also represent a joint-preserving surgery protecting the articular cartilage through correcting the mechanics and equally redistributing the joint loads thus preventing progressive degenerative arthritis.