Medial Osteotomy Research Articles

The Nasal Locator: An Innovative Instrument to Define the Exact Point of Osteotomy in Preservation or Structural Rhinoplasty.

One of the most common components of most dorsal preservation (DP) techniques is subdorsal septal excision. Whatever the instrument used for this procedure (piezoelectric, Rongeur, or long scissors), it is paramount to be able to determine the exact subdorsal point (SDoP) at which the osteotomy/ostectomy (or cartilage cut) has been reached. First, to avoid any unnecessary extension of the osteotomy that increases the risk of fracture spreading into the cribriform plate and a consequent cerebrospinal fluid leak; second, to be sure that the subdorsal cut is high enough and can be combined/unified with the planned radix osteotomy.In addition, transverse osteotomies are usually necessary in both preservation and structural rhinoplasties. Even though many surgeons are satisfied with their osteotomy lines, it sometimes proves difficult to be sure of their position, especially during a DP rhinoplasty when both the transverse lines have to go in the direction of the planned radix osteotomy.We have developed the Nasal Locator (NL) to precisely define various nasal points of interest, such as a subdorsal cut (cartilaginous or bony), or a transverse or medial osteotomy line. It ends in two tips. The lower tip is placed at the point we wish to determine (e.g., SDoP or a transverse osteotomy), while the upper tip is fixed a certain distance from it (in all three dimensions), showing its exact location.Our in-depth research of the literature and the market has not revealed any device similar in form and function to the NL.We have been using the NL for almost 2 years and are confident of its usefulness. It is easy to use, and practically no time is needed to become familiar with it. During surgery, it is needed for less than 30 seconds and is risk-free. It is fully sterilizable and can be used repeatedly.

Influence and risk factors of lateral hinge fracture on early effectiveness of supramalleolar osteotomy

To evaluate the influence of lateral hinge fracture (LHF) on the early effectiveness of supramalleolar osteotomy (SMO) and to explore the related risk factors for LHF. A total of 39 patients (39 feet) with varus-type ankle osteoarthritis treated with SMO between January 2016 and December 2022 were analyzed retrospectively. There were 10 males and 29 females, aged from 41 to 71 years (mean, 57.7 years). According to Takakura stage, there were 6 feet in stage Ⅱ, 19 feet in stage Ⅲa, and 14 feet in stage Ⅲb. The LHF was recognized by the immediate postoperative X-ray film. The osteotomy healing time and the changes of pain visual analogue scale (VAS) score, American Orthopaedic Foot and Ankle Society (AOFAS) score, tibial anterior surface angle (TAS), tibial lateral surface angle (TLS), and tibiotalar angle (TT) before and after operation were compared between patients with and without LHF. The age, gender, affected side, body mass index, Takakura stage, preoperative VAS score, preoperative AOFAS score, preoperative TAS, preoperative TLS, preoperative TT, SMO correction angle, osteotomy distraction, distance from medial osteotomy to ankle joint line (MD), and distance from lateral osteotomy to ankle joint line (LD) were compared between with and without LHF patients, and further logistic regression analysis was used to screen the risk factors of LHF during SMO. All patients were followed up 12-54 months (mean, 27.1 months). During operation, 13 feet developed LHF (group A) and 26 feet did not develop LHF (group B). X-ray film reexamination showed that 1 patient in group A complicated with tibial articular surface cleft fracture had delayed osteotomy and healed successfully after plaster fixation; the osteotomy of other patients healed, and there was no significant difference in healing time between the two groups ( P>0.05). At last follow-up, there were significant differences in VAS score, AOFAS score, TAS, TLS, and TT of the two groups when compared with preoperative ones ( P<0.05), but there was no significant difference in the changes of above indicators before and after operation between the two groups ( P>0.05). The differences in SMO correction angle, osteotomy distraction, and LD between with and without LHF patients were significant ( P<0.05), and further logistic regression analysis showed that excessive LD was the risk factor of LHF during SMO ( P<0.05). Too high or too low lateral hinge position during SMO may lead to LHF, but as long as appropriate treatment and rehabilitation measurements are taken, the early effectiveness is similar to that of patients without LHF.

Which factors affect the lingual fracture pattern in sagittal split ramus osteotomy?

The purpose of this study was to elucidate the effects of mandibular anatomy and osteotomy technique on lingual fracture patterns in SSRO. The predictor variables were: length of horizontal medial osteotomy; type of border osteotomy; buccolingual width; and vertical length of the basal cortex. The outcome variable was the type of lingual split pattern. This was categorized into four types according to a lingual split scale (LSS): LSS 1, true Hunsuck; LSS 2, fracture line to posterior border of the ramus; LSS 3, through to mandibular canal; LSS 4, unfavorable fracture pattern.Data were analyzed using analysis of variance and the Pearson χ2 test. Values of p < 0.05 were considered statistically significant. The study sample comprised 312 lingual split patterns in 156 patients. The most common type of lingual split pattern was LSS 1 (n = 204). There was a significant relationship between inferior border osteotomy type and LSS type (p = 0.001). Whilst LSS 1 was the most common among all border osteotomy types. LSS 4 was most frequently observed in cases where the lower border osteotomy remained in the buccal surface.According to the results of this study, the likelihood of an unfavorable split pattern increases when the lower border osteotomy remains in the buccal surface.

Is Previously Implanted Osteosynthesis Material an Obstacle for the Use of Customized Guides?: A Case Report.

We present the case of a 46-year-old patient with asymmetric deformity in the posterior tibial slope after previous high tibial osteotomy surgeries with the presence of a medial osteotomy plate. A customized cutting guide was designed to fit on the plate to perform a single surgery and avoid possible soft-tissue complications after multiple surgeries. The presence of a previous internal fixation device may affect the manufacture of 3-dimensional cutting guides. However, in this case, the previously placed osteosynthesis plate was used as an aid for creating the guide.

A Combined Exoscopic and Endoscopic Approach for Radical Temporal Bone Resection and Usefulness of the Endoscopic Approach to the Medial Aspect of the Temporal Bone.

Radical temporal bone resection (TBR) for lateral skull base malignancies is technically challenging because of the vital anatomical structures located at the medial part of the temporal bone and their limited exposure. A possible solution is to adopt an additional endoscopic approach for medial osteotomy to reduce blind spots. The authors aimed to describe a combined exoscopic and endoscopic approach (CEEA) for cranial dissection in radical TBR and to determine the usefulness of the endoscopic approach to the medial aspect of the temporal bone. Having utilized the CEEA in for cranial dissection in radical TBR since 2021, the authors included 5 consecutive patients who underwent the procedure between 2021 and 2022. All surgeries were successful and resulted in no significant complications. The additional use of an endoscope improved visualization of the middle ear in 4 patients and that of the inner ear and carotid canal in 1 patient, enabling precise and safe cranial dissection. Furthermore, surgeons experienced reduced intraoperative postural stress with CEEA than with a microscopic approach. The main advantage of CEEA in radical TBR was the extension of the viewing angles of the endoscope, which allowed observation of the medial aspect of the temporal bone and limited tumor exposure and injury to vital structures. Given the other benefits of exoscopes and endoscopes, including compact size, ergonomics, and surgical field accessibility, CEEA proved to be an efficient treatment option for cranial dissection in radical TBR.

Poster 245: Clinical Measurement of the Standard Q-Angle Correlates Poorly with Tibial Tuberosity to Trochlear Groove Distance in Awake Patients and Anesthetized Patients with Patella Alta and Trochlear Dysplasia

Objectives: The quadriceps angle (Q-angle) measures the force vector of pull of the extensor mechanism of the knee. A larger Q-angle is thought to be a predisposing factor for patellar dislocation, but previous literature has reported poor reliability and validity of clinically measured Q-Angle. In response to poor reliability, a new “Standard Q-Angle” (SQA) was developed by Merchant et al. (Merchant 2020) in an attempt to create a standardized and repeatable method of clinically measuring the Q-Angle. The SQA may be a practical, inexpensive, and valuable part of physical examinations to help clinicians decide if concomitant medializing osteotomy is indicated in patellar stabilization procedures. However, SQA has not yet been validated in patients with anatomic risk factors for recurrent patellar instability such as patella alta and trochlear dysplasia. Furthermore, while SQA has previously been demonstrated to have strong interrater reliability, it has never been shown to correlate with standardized measurements for a lateralized tibial tuberosity, such as the Tibial Tuberosity – Trochlear Grove (TT-TG) distance. Therefore, the purpose of our study was to determine the correlation between SQA and TT-TG distance in patients with recurrent patellar instability. We hypothesized that there would be a positive correlation between SQA and TT-TG distance. 1. Merchant AC, Fraiser R, Dragoo J, Fredericson M. A reliable Q angle measurement using a standardized protocol. Knee. 2020;27(3):934-939. Methods: Patients at a single institution treated by a single surgeon with recurrent patellar instability who had previously obtained a dynamic 4D CT scan were included in this study. Patients who had previous patellar stabilization procedures were excluded. The Standard Q-angle was measured as previously described by Merchant et al. (Merchant 2020). The patient was placed in the supine position with the knee extended. A long-arm goniometer was centered over the patella with the distal arm over the tibial tuberosity and the proximal arm extended up to the anterior superior iliac spine (ASIS). The examiner then centered the patella within the trochlear groove and the SQA was measured. A second examiner stood at foot of the patient’s bed to confirm positioning. Measurements were taken in the office, as well as in the operating room after the induction of general anesthesia. All measurements were performed by the senior author (***). Utilizing 4D CT scans, the TT-TG, Caton-Deschamps index (CDI), and lateral trochlear inclination (LTI) were measured as previously described. Patients whose CDIs were between 0.8 and 1.2 were considered to have normal patellar height. Patients whose LTIs were &gt;11° were considered to have normal LTI, which has been shown to have a sensitivity of 93% and a specificity 87% for detecting trochlear dysplasia. Mean and standard deviation values were calculated for patient demographic information, and correlation coefficients were calculated to compare SQA with TT-TG distance in both awake and anesthetized patients. The statistical software Stata was utilized for all analyses (StataCorp. 2021. Stata Statistical Software: Release 17. College Station, TX). Results: Fifty-seven patient knees were included in the study. The mean age was 22 years-old (±6 years). For awake patients, the correlation coefficient (R2) between SQA and TT-TG was -0.006 (Figure 1), and in anesthetized patients R2 = 0.093 (Figure 2). In the “normal patellar height” group, the R2 value was higher in the anesthetized group (R2 = 0.334) than the awake group (R2 = 0.239). In the normal lateral trochlear inclination group, there was also a greater R2 value in the anesthetized group (R2 = 0.403) than the awake group (R2 =0.093). The correlation between SQA and TT-TG was the strongest in anesthetized patients with both a CDI &lt; 1.2 and LTI &gt;11° (R2 = 0.635). Conclusions: There was a strong positive association between SQA and TT-TG in anesthetized patients with normal patellar height and a normal lateral trochlear inclination. However, in awake patients and patients with anatomic risk factors for recurrent patellar instability there was only a weak association between SQA and TT-TG. The SQA may be able to provide useful information, but only in selected cases. Therefore, it remains important to have objective radiographic measurements to characterize the position of the tibial tuberosity when planning patellar stabilization surgery.

Concomitant anterior medializing osteotomy and MPFL reconstruction improves patellar tilt when compared to MPFL reconstruction alone.

Understanding how surgical procedures influence anatomic factors associated with patellofemoral instability can help guide surgeons when planning treatments for individual patients. This study sought to understand how patellar tilt is affected in adolescent patients with elevated pre-operative tibial tuberosity to trochlear groove (TT-TG) values undergoing medial patellofemoral ligament reconstruction (MPFLR) with or without an anterior medializing osteotomy (AMZ). Utilizing a prospective database of 274 patellofemoral instability patients who underwent MPFLR ± AMZ by one of two orthopedic surgeons at a single institution, those who underwent MPFLR + AMZ were identified. Pre-operative and post-operative magnetic resonance imaging (MRI) were used to measure TT-TG distance, while radiographs were used to measure patellar tilt (tilt). Patients were matched based on age at surgery (within 2years) and pre-operative TT-TG distance (within 2mm) to a comparison cohort of patients who underwent isolated MPFLR (iMPFLR) without osseous procedures. A total of 56 patients were analyzed (28 per group). The mean age of the cohort was 15.5 ± 2.0years and was similar between both groups (15.9 ± 1.9 versus 15.1 ± 2.0years [n.s]). When comparing the two cohorts, significant pre- to post-operative decreases in patellar tilt for both MPFLR + AMZ (6.6 degrees, p < 0.001) and iMPFLR (3.9 degrees, p = 0.013) were noted. While there were no differences in pre-operative patellar tilt (21.2 ± 3.5 versus 21.1 ± 3.4 [n.s]), post-operatively, MPFLR + AMZ had significantly less patellar tilt than iMPFLR (13.2 ± 5.5 versus 16.5 ± 4.4, p = 0.017). This study found that patellar tilt significantly improved in participants undergoing either MPFLR + AMZ or iMPFLR. In addition, those undergoing MPFLR + AMZ were found to have significantly lower post-operative tilt than those undergoing iMPFLR. If patellar tilt is found pre-operatively to be significantly elevated and a risk for future dislocations, these findings suggest that surgeons might strongly consider MPFLR with AMZ to further address the increased tilt. III.

Incidence and risk factors for non-union of the superior ramus osteotomy when hip dysplasia is treated with periacetabular osteotomy.

Periacetabular osteotomy (PAO) is a well-established surgical treatment for hip dysplasia. Few studies report risk factors for the development of superior ramus osteotomy non-union. The purpose of this investigation was to document the incidence and risk factors for this complication. We identified 316 consecutive hips that underwent PAO for symptomatic acetabular dysplasia with a minimum 1-year radiographic follow-up. We developed and validated a technique to measure the superior ramus osteotomy location on anterior-posterior (AP) pelvis radiographs and computed tomography. Logistic regression with generalized estimating equations was used to evaluate the relationships between odds of non-union and potential demographic and radiographic predictor variables in univariate and multivariate analyses. Twenty-nine (9.2%) hips developed superior ramus non-union. Age {median [interquartile range (IQR)] 23 years (18-35) healed versus 35 years (26-40) non-united, P = 0.001}, pre-operative lateral center-edge angle (LCEA) [16° (11-20) healed versus 10° (6-13) non-united, P < 0.001] and the distance from the superior ramus osteotomy to the ilioishial line [15.8 mm (13.2-18.7) healed versus 18.1 mm (16.2-20.5) non-united, P < 0.001] varied significantly between groups. Using multivariate analysis, moderate-to-severe dysplasia [LCEA < 15°, odds ratio (OR) 5.95, standard error (SE) 3.32, 95% confidence interval (CI) 1.99-17.79, P = 0.001], increased age (5-year increase, OR 1.29, SE 3.32, 95% CI 1.105-1.60, P-value = 0.018) and distance from the ilioishial line (3-mm increase, OR 1.67, SE 0.22, 95% CI 1.29-2.18, P < 0.001) were at increased risk of developing non-union. Superior ramus osteotomy non-union is common after PAO. Older age, moderate-to-severe dysplasia, and more medial osteotomy location were independent risk factors for non-union. Consideration should be made in high-risk patients for a more lateral superior ramus osteotomy and adjuvant medical and surgical interventions.

Plate vs. intramedullary screw fixation of chevron olecranon osteotomies: a biomechanical study

Intra-articular distal humerus fractures frequently require olecranon osteotomies for adequate exposure, but fixation of olecranon osteotomies is associated with high rates of hardware-related complications requiring subsequent reoperation for removal. Intramedullary screw fixation is an attractive option to attempt to minimize hardware prominence. The purpose of this biomechanical study is to directly compare intramedullary screw fixation (IMSF) with plate fixation (PF) of chevron olecranon osteotomies. It was hypothesized that PF would be biomechanically superior to IMSF. Chevron olecranon osteotomies of 12 matched pairs of fresh-frozen human cadaveric elbows were repaired with either precontoured proximal ulna locking plates or cannulated screws with a washer. Displacement and amplitude of displacement at the dorsal and medial aspects of the osteotomies under cyclic loading conditions were measured. Finally, the specimens were loaded to failure. The IMSF group had significantly greater medial displacement (P=.034) and dorsal amplitude (P=.029) than the PF group. Medial displacement was negatively correlated with bone mineral density in the IMSF group (r=-0.66, P=.035) but not in the PF group (r=.160, P=.64). Mean load to failure between groups, however, was not statistically significant (P=.183). While there was no statistically significant difference in the load to failure between the two groups, IMSF repair resulted in significantly greater displacement of the medial osteotomy site during cyclic loading and greater amplitude of displacement dorsally with loading force. Decreased bone mineral density was associated with an increased displacement of the medial repair site. These results suggest that IMSF of olecranon osteotomies may result in increased fracture site displacement when compared to PF; this displacement may be greater in patients with poor bone quality.

The role of the oblique medial osteotomy angle during osteochondral fragment fixation in patients with a posteromedial osteochondral lesion of the talus

BackgroundMedial malleolar osteotomy has been widely performed for posteromedial osteochondral lesions of the talus (OLT) to expose the lesion. In osteochondral fragment fixation, bioabsorbable pins should be inserted as perpendicular as possible to obtain the rigid fixation. However, the exposure of the lesion may depend on the osteotomy angle, which affects the pin insertion angles. This study aimed to analyze the relationship between pin insertion and osteotomy angles in the medial malleolar osteotomy. MethodsTwenty-four ankles of 23 patients were included. The malleolar bisector angle which was calculated from radiographs and actual osteotomy angles were measured on radiographs, and the pin insertion and osteotomy angles were measured using MRI. The intersection angle was defined by the tangential line of the tibial plafond and medial malleolar articular facet, and the bisector of this angle was defined as the malleolar bisector angle. The relationship between pin insertion and osteotomy angles was analyzed. ResultsThere was no significant difference between the actual osteotomy (55.7° ± 6.6°) and malleolar bisector angles (57.4° ± 4.3°) on the radiograph. There was a significant correlation between pin insertion and osteotomy angles (rs = 0.601). The pin insertion angle (54.3° ± 5.9°) in the lower actual osteotomy angle than the malleolar bisector angle was smaller than those in the higher actual osteotomy angle (63.4° ± 8.2°). ConclusionsThis study showed the osteotomy angle affected pin insertion angle. The osteotomy angle should not be smaller than the malleolar bisector angle at medial malleolar osteotomy to insert pins as perpendicular as possible for fixation of posteromedial OLTs.

Distal tibial tubercle osteotomy can lessen change in patellar height post medial opening wedge high tibial osteotomy? A systematic review and meta-analysis

ObjectiveMedial opening wedge high tibial osteotomy (MOWHTO) is a mainstream surgical method for treating early medial compartment knee osteoarthritis. Undesirable sequelae such as patella infera may happen following tuberosity osteotomy. We conducted this systematic review and meta-analysis to compare the change in patellar position after proximal tibial tubercle osteotomy (PTO) versus distal tibial tubercle osteotomy (DTO) intervention.MethodsThe 11 studies were acquired from PubMed, Medline, Embase and Cochrane Library. The data were extracted by two of the coauthors independently and were analyzed by RevMan5.3. Mean differences, odds ratios and 95% confidence intervals were calculated. Cochrane Collaboration’s Risk of Bias Tool and Newcastle–Ottawa Scale were used to assess risk of bias.ResultsEleven observational studies were assessed. The methodological quality of the trials ranged from moderate to high. The pooled results of postoperative patellar height (Caton-Deschamps index and Blackburne-Peel index) and postoperative complications showed that the differences were statistically significant between PTO and DTO interventions. Patellar index ratios decreased significantly in the PTO groups, and 12 (9.2%) complications under DTO surgery and 2 (1.6%) complications under PTO surgery were reported. The differences of postoperative posterior tibial slope (angle) was not statistically significant, but postoperative posterior tibial slope of both groups increased. Sensitivity analysis proved the stability of the pooled results and the publication bias was not apparent.ConclusionsDTO in MOWHTO maintained the postoperative patellar height, and clinically, for patients with serious patellofemoral osteoarthritis, DTO can be preferred. Postoperative complications are easily preventable with caution. In view of the heterogeneity and small sample size, whether these conclusions are applicable should be further determined in future studies.

Quantitative and Qualitative Assessment of Medial Osteotomy of the Greater Palatine Foramen in Wide Cleft Palate Repair

Background:Repairing of a wide cleft palate faces with several problems, e.g. medialization of palatal flaps, lack of tissue for repair, and fistula formation. We aimed at quantitative and qualitative evaluation of medial osteotomy of the greater palatine foramen for patients with wide cleft palate and its postoperative outcomes. Methods:Eight patients 4 males, 4 females with wide cleft palate and the median age of 1.5 year were operated using medial osteotomy of the greater palatine foramen from 2018-2020. In this technique, the osteotomy was carried in the outlet of vascular pedicle medially and posteriorly. This led to more degrees of freedom for the vascular pedicle and a palatoplasty without tension through mucoperiosteal flap movement toward the medial direction. Results:After osteotomy and repairing for 8 patients (16 flaps), the mean (SD) length of mucoperiosteal flap pedicle was significantly increased from 2.78 mm to 6.09 mm (P<0.001). All patients were successfully repaired with no major complications, and none of them required any secondary repair. Three weeks postoperatively, all patients showed normal feeding, normal nasal resonance of speech with normal palatal mobility.Conclusion:Osteotomy of the greater palatine foramen for the closure of wide palatal clefts showed a good efficiency, quantitatively and qualitatively. The mean length of mucoperiosteal pedicle increased by 3.22 mm (6.44 mm for bilateral) after repairing, which helps to more freely medial movement of the palatal flap and lesser tension across its closure. All patients were successfully improved without any major complications.

Effect of bone morphology of the tibia plateau on joint line convergence angle in medial open wedge high tibial osteotomy

BackgroundChange in the joint line convergence angle (JLCA) of the knee after high tibial osteotomy (HTO) is difficult to predict accurately. Given that any change in JLCA is intra-articular, the shape of the articular surface, including the bone morphology of the proximal tibia, may affect the alignment of the knee joint postoperatively. The purpose of this study was to investigate the relationship between the shape of the tibial plateau and postoperative alignment of the knee joint by focusing on changes in JLCA.MethodsOne hundred and nine knees that underwent HTO were retrospectively reviewed. The shape of the tibial plateau was classified based on the slope of the medial and lateral articular surfaces as depressed, flat (within 3 degrees), or convex (pagoda-like). The relationship between the shape of the tibial plateau and radiological parameters was investigated.ResultsThe shape of the tibial plateau was depressed in 38 knees, flat in 52 knees, and pagoda-like in 19 knees. There was a moderate correlation between the postoperative change in JLCA and the preoperative hip-knee-ankle angle for knees with a pagoda-shaped tibial plateau (r = 0.56) but not for the other two shapes.ConclusionsThese findings suggest that knees with marked varus deformity before HTO are likely to show more change in JLCA postoperatively if the tibial plateau is pagoda-shaped than if it has a depressed or flat shape. The advantage of focusing on the bone morphology of the proximal tibia is that surgeons can easily perform visual assessment using preoperative radiograph.

What can influence the outcome of open wedge high tibial osteotomy?

Objective – to assess the effect of patient-specific parameters (age, body mass index (BMI), stage of the knee osteoarthritis (KOA), the osteotomy gap size, concomitant medial opening angle high tibial osteotomy (MOWHTO) arthroscopic plastic (AP) and open chondroplasty (OCHP) on the development of complications and the outcome of the operation.Materials and methods. The study included 76 patients who underwent MOWHTO. To study the influence of each of the parameters, comparison groups were created: 1) by age: patients younger and older than 60 years (45 versus 31); 2) by BMI: patients with BMI&lt;30 kg/m2 versus patients with a BMI from 30 to 40 kg/m2 (35 versus 41); 3) by the osteotomy gap size: ≤10 mm and &gt;10 mm (29 versus 47); 4) by stages of KOA: patients with stage I and II versus patients with stage III (43 versus 33); 5) patients with MOWHTO + AP of the knee or OCHP versus patients who underwent only MOWHTO (34 versus 42). To assess the result, we studied the change in pain intensity according to the visual analogue scale (VAS), as well as the state of the knee joint according to the Knee Society Score (KSS) scale before surgery and 1 year after MOWHTO.Results. The development of complications had a weak direct relationship with stage III of the KOA (r=–0.24) and moderate strength a direct relationship with the osteotomy gap size &gt;10 mm (r=–0.42). Age, BMI, the presence of concomitant AP of the knee or OCHP did not affect the development of complications. However, the number of complications was statistically significantly higher among patients with stage III and osteotomy gap size &gt;10 mm relative to patients with stage II of the KOA (p=0.03) and patients with deformity correction ≤10 mm (p=0.0002). Age over 60 years and BMI&lt;30 kg/m2 had a direct weak relationship (r=0.27 and r=0.23) with the achievement of a satisfactory result. An excellent result had a direct weak relationship with a BMI&lt;30 kg/m2 and stages I–II of the KOA (r=0.34 and r=0.31), as well as a direct moderate strength relationship with an osteotomy gap size ≤10 mm (r=0.46). At the age of patients over 60 years, a satisfactory result was significantly more frequent compared with patients of young and middle age (p=0.016). 71.1% of excellent results were obtained in patients with a BMI&lt;30 kg/m2 (p=0.002), and there were significantly more good and satisfactory results in the group of patients with a BMI&gt;30 kg/m2 (p=0.08 and p=0.04). At stage III, an excellent result was obtained 3 times less frequently than in patients with stages I and II of the KOA (p=0.004). In patients with gap size ≤10 mm, excellent results were 1.5 times greater than in patients with a gap size &gt;10 mm (p=0.00006). There were no differences in the results in patients who underwent MOWHTO in isolation and in patients in whom MOWHTO was supplemented with AP of the knee or OCHP.Conclusions. The development of complications is associated with stage III of the KOA and the need for correction (the osteotomy gap size) &gt;10 mm. The best result of MOWHTO can be obtained in patients under the age of 60 years, with a BMI &lt;30 kg/m2 at stages I–II of the KOA and deformity correction within 10 mm. Concomitant AP of the knee or OCHP don’t affect the development of complications and the outcome of the operation.

Influence of lower-limb mechanical axis on the curative effect of medial high tibial osteotomy for knee osteoarthritis

PurposeTo investigate the effect of the ratio of the medial tibial plateau width to the total tibial plateau width on the therapeutic efficacy of high tibial osteotomy (HTO) on the medial side for the treatment of knee osteoarthritis.MethodsIn this study, we retrospectively analyzed information of 278 patients who underwent medial HTO for knee osteoarthritis with varus deformity. The Tinetti Gait and Balance Assessment Tool, the Visual Analog Scale (VAS), and the Knee Society Scoring System (KSS) were used to comprehensively evaluate the function of the knee joint after HTO.ResultsAfter adjusting for potential confounding factors (i.e., age, gender, body mass index/BMI, and surgical site), the Tinetti assessment score was optimized when the degree of correction was 53.67%, with the β-value on the left and right sides of the inflection point of 0.49 (confidence interval, CI: 0.20, 0.78, P = 0.0009) and− 0.26 (95% CI: − 0.30, − 0.22, P < 0.0001), respectively. The KSS score was optimized when the degree of correction was 55.45%, with the β-value on the left and right sides of the inflection point of 2.77 (95% CI: 1.64, 3.90, P < 0.0001) and − 1.18 (95% CI: − 1.46, − 0.91, P < 0.0001), respectively. The VAS score was the lowest when the degree of correction was 55.00%, with the β-value on the left and right sides of the inflection point of − 0.16 (95% CI: − 0.29, − 0.03, P = 0.0146) and 0.08 (95% CI: 0.05, 0.10, P < 0.0001), respectively. Stratified analysis showed that the BMI affected the Tinetti assessment score (β = − 0.14, 95% CI: − 0.24, − 0.04, P = 0.0071). According to the smooth-curve fitting results, when the BMI was > 28, the Tinetti assessment score showed a negative trend.ConclusionThe degree of lower-limb mechanical axis correction correlated with the functional status of the knee joint after MOW HTO. When the ratio of the medial tibial plateau width to the total tibial plateau width was approximately 55%, the post-MOW HTO outcomes were optimized and the patients experienced the highest satisfaction. In addition, very high BMI was not conducive for the postoperative recovery of the knee joint function.Level of evidence: III Case–control study/Retrospective comparative study.

Assessment of Medial Open Wedge High Tibial Osteotomy in Management of Medial Compartment Osteoarthritis of The Knee

Assessment of Medial Open Wedge High Tibial Osteotomy in Management of Medial Compartment Osteoarthritis of The Knee

Simultaneous Gradual Correction of Bilateral Late Onset Tibia Vara using High Tibial Osteotomy with a Mono-Axis Dynamic External Fixator: A Case Report

Tibia vara is a disease characterized by an abrupt angulation of the tibia into varus in the proximal end. This condition is caused by developmental growth defect of the proximal tibia physis. Tibia Vara can be classified into groups according to the age of the patient and the mainstay treatment is either acute or gradual surgical correction.A 21 year-old man with chief complaint bowing of the legs with leg pain since 3 years ago. Physical examination showed bilateral genu varum. The anteroposterior long leg standing X-Ray found that the deformity was of osseous origin at the proximal part of the tibia in varus position. Medial osteotomy of the proximal tibia was performed and a dynamic external fixator was installed. Gradual correction was performed at a rate of 1 mm per day. After 3 months, radiological evaluation showed good union and target angle of correction with acceptable mechanical axis was achieved. Patient had no complaint of pain or instability post-surgery.Gradual correction using external fixator provides a more flexible angle correction with lower risk of neurovascular compromises; but with its own disadvantage such as loss of correction after removal of the external device. In this case, gradual correction of late onset tibia vara using dynamic external fixator provides satisfactory outcome and enable a more fine-tuned angle correction. It also potentially eliminate the need for a second surgery to remove the external device; thus reducing the length of hospitalization.

Triplane osteotomy combined with talar non-weight-bearing area autologous osteochondral transplantation for osteochondral lesions of the talus

BackgroundTraditional medial malleolar osteotomy combined with autologous osteochondral transplantation (AOT) is mostly used in the treatment of osteochondral lesions of the talus (OLTs), but with high osteotomy and donor site complications. We hypothesis a new triplane medial malleolar osteotomy combined with AOT from non-weight-bearing area of the talus could be a promising choice for OLTs.MethodsWe reviewed all the symptomatic OLTs patients who received AOT with triplane osteotomy of the medial malleolus between September 2015 and December 2017 in our department. According to the inclusion and exclusion criteria, 23 patients (23 ankles), including 14 males and 9 females, were included in the study. The mean age was 35.6 years. The mean size of the lesion area was 141.5 mm2. According Ferkel’s classification, including 5 type I, 11 typeIIa and 7 typeIIb. The visual analog scale (VAS) for pain during walking and the American Orthopaedic Foot and Ankle Society (AOFAS) ankle-hindfoot score were used for the pre- and postoperative evaluations. In addition, the incorporation of the grafts was assessed by computed tomography (CT).ResultsAll patients had a minimum follow-up of 22 months, with an average of 37.1 months. The mean time from osteotomy to full weight-bearing activity was 8.1 ± 2.3 weeks (range, 5–12 weeks). The mean VAS score improved from 5.6 ± 0.7 preoperatively to 0.7 ± 1.0 postoperatively (P < 0.01). The AOFAS ankle-hindfoot score improved significantly in all domains (P < 0.01). Twenty-one patients returned to sport at their previous level, and 2 returned at a lower level compared with preinjury (mean return to play, 7.4 months). According to CT, the medial malleolus recovered in all patients, and the graft was incorporated well. One patient suffered from flexor hallucis longus tendon discomfort due to internal fixation screw irritation posteromedial to the ankle. The general complication rate was 4.3% (1/23).ConclusionsThese results indicate that AOT combined with medial malleolus triplane osteotomy maybe a viable option for OLTs. Patients could perform weight-bearing exercise and return to sport as early as possible, with a lower rate of complications at the osteotomy site and donor site. However, the large sample well-designed prospective comparative studies are still needed.

Tarsal Tunnel Syndrome Following Medializing Calcaneal Osteotomy

Category:HindfootIntroduction/Purpose:The tarsal tunnel syndrome is a compressive neuropathy that affects either the posterior tibial nerve, within the tarsal tunnel, or one of its terminal branches. It can be caused by extrinsic or intrinsic factors. Even though the tarsal tunnel syndrome has been reported as a complication of lateralizing calcaneal osteotomy, we have not identified in the literature reports of this syndrome associated to medializing calcaneal osteotomy. We report the case of a 60-year-old female who developed a tarsal tunnel syndrome, on the third postoperative week, following a medializing calcaneal osteotomy for flatfoot correction with stage IIB posterior tibial tendon dysfunction.Methods:We reviewed and obtained the information from the medical records of this patient: clinical examination, radiographs, computed tomography, magnetic resonance imaging, and outcome. Pain was assessed with visual analog scale (VAS).Results:The patient is a 60-year-old female with left stage II posterior tibial tendon dysfunction who failed to respond to conservative treatment. Medializing and lengthening (Evans) osteotomies of the calcaneus were performed, together with posterior tibial tendon repair and spring ligament reconstruction. In the postoperative, after a cast replacement into a more plantigrade position, the patient developed symptoms that suggested a compressive neuropathy of posterior tibial nerve within the tarsal tunnel associated to calcaneal medializing osteotomy. Initial conservative treatment failed and the posterior tibial nerve was explored under loupe magnification and the tarsal tunnel was released. Figure 1. An immediate improvement in pain was observed postoperatively and almost full recovery occurred within 6 months.Conclusion:In our case report, the tarsal tunnel syndrome was a consequence of the osteotomy fragment displacement that generated a reduction of the tarsal tunnel volume. It has been described that the tarsal tunnel syndrome symptoms become more evident with ankle dorsiflexion and eversion, in our patient this can be associated with the symptom exacerbation presented when the cast was placed into plantigrade position. We conclude that even though in the literature the tarsal tunnel syndrome has been mainly associated to lateralizing osteotomies, it is important to take this complication into account when performing a medializing osteotomy.

Gouty tophus as a rare cause of a Hepple stage V osteochondral lesion of the talus

BackgroundTalus osteochondral lesion is commonly associated with trauma, avascular necrosis or even genetic factors, but gouty tophus as a cause of Hepple stage V type talus osteochondral lesion is rare.Case presentationHere, we report a case of an 18-year-old man who complained of left medial deep ankle pain on ambulation. This young man had an extreme liking of sea food rich in purines and also sugar-sweetened drinks. He was diagnosed with a Hepple stage V type talus osteochondral lesion and was treated with medial malleolus osteotomy and an osteochondral graft. The talus osteochondral lesion was found to be a gouty tophus and was completely removed. Hypouricemic therapy was prescribed for 2 months, which allowed the patient to walk with a visual analogue score (VAS) score of 1. He was followed up for 12 months.ConclusionsYoung people with an extreme liking of sea food rich in purines and also sugar-sweetened drinks may be at a risk of developing gout. Acute onset of ankle atraumatic pain, swelling with a high level of serum uric acid and a talus osteochondral lesion with cyst formation should make physicians consider a diagnosis of gout.