1. Double osteotomy was performed on 1 50 knees between 1961 and 1969. The first fifty-seven cases were assessed independently. 2. The operation of osteotomy of the upper end of the tibia and the lower end of the femur is described. it is emphasised that the osteotomy sites are close to the bone ends and well within the cancellous expansion. 3. The indications for the operation are pain and loss of function in a mobile arthritic knee joint. 4. Flexion of the knee is important during the operation to allow the popliteal artery to be moved away from bone. Arteriograms at necropsy show the danger of damaging the popliteal artery when the knee is extended. 5. The operation appears to be equally effective in osteoarthritis and rheumatoid arthritis. The proliferated synovium of the active rheumatoid knee regresses rapidly following operation. 6. The operation has resulted in relief of pain and increase in function in many knees which had no deformity. When a deformity did exist before operation recurrence of the deformity did not appear to influence the result. 7. The cause of relief of symptoms after osteotomy is not known, and it is suggested that answers to the following questions should be sought: Why are some arthritic knees painful and some not ? Why does physiotherapy relieve pain ? Why does osteotomy relieve pain? Why is double osteotomy followed by regression of synovial proliferation ? Why does osteotomy sometimes fail ? Would osteotomy of one bone (tibia or femur) be sufficient?

Introduction and Aims: The purpose of our study was to assess the efficacy of double osteotomy of the radius and ulna for correction of Madelung’s deformity. Made-lung’s deformity is a congenital alteration of the growth of the ulnar portion of the distal radius resulting in pain, decreased function of the wrist and hand and serious aesthetic disturbances. Method: Four wrists in four patients with a mean age of 18.3 years were treated for symptomatic increased ulnar and volar inclination of the distal articular surface of the radius. All patients complained of wrist pain. In addition, two of them were dissatisfied with the aesthetic appearance of their wrist and the restricted range of movement. A double osteotomy of the radius and ulna was performed. The ulna was stabilised with a six-hole semi-tubular plate and the radius with a titanium T-plate. Results: At one-year follow-up: pain relief and cosmetic appearance were satisfactory in all patients. Grip strength improved by 5.3 pounds. Average flexion improved from 63 to 67 degrees and pronation from 59 to 66 degrees. Abduction increased from three to six degrees and adduction from 16 to 21 degrees. Realignment of the wrist was shown radiographically by a change of ulnar inclination and volar inclination of the radius from 35.5 to 24 degrees and 15.5 to 10.5 degrees respectively. There was no evidence of recurrence of the deformity in any of the four wrists. Conclusion: The initial results with the double osteotomy of the radius and ulna for Madelung’s deformity are promising but need longer follow-up

Purpose of the study: The purpose of this study was to assess radiological outcome of double (femoral and tibial) osteotomy for severe genu varum. Between August 2001 and November 2004, eleven double osteotomies were performed amoung a series of 157 knee osteotomies (7%). Material and methods: The series included four women and seven men, mean age 48.5 years (range 20–62 years). The right knee was involved in seven. One femal patient presented a particularly serious deformity but without oseoarthritic degeneration of the knee joint. The ten other patients all presented overtly degenerative knees. According to the Ahlback modified classification there were six grade III knees, three grade IV and one grade V. Mean preoperative radiological varus was 167.5±2.1° (ange 164–170°°. Orthopilot® was used in all cases. The first step was to insert percutaneously rigid bodies, one into the distal femur and the other into the proximal tibia. Kinematic acquisitions of the hip, the knee and the tibiotalar joint yielded the HKA for the lower limb. The second step was to perform the closed wedge lateral femoral osteotomy (5–6°) which was stabilized with an AO T-plate. The final step was to perform an open-wedge medial tibial osteotomy. After checking the desired alignment (182±2°) on the monitor, the osteotomy was fixed with Biosorb® and plated with an AO LCP. Results: There were no complications. The mean intraopeartive HKA was 168.1±2.21° (range 164–170°), identical with the preoperative findings. After osteotomy, the mean angle provided by the computer system was 182.7±1.1° (range 182–184°). Three months after surgery, the mean alignment on the standing x-ray was 180.8±1.6° (range 177–182°). The preoperative objective was achieved for all knees but one (91% success). There were no x-rays with an oblique joint space. Conclusion: Computer-assisted double osteotomy for major genu varum is a reliable accurate and reproducible technique. Use of a navigation simplifies a generally difficult procedure known to require much surgical skill to achieve the preoperative goal. This technique can be considered as an important development since it can help avoid an oblique joint space which can give rise to further problems and the need for a subsequent prosthesis

Aims. The mainstay of surgical correction of hallux valgus is first metatarsal osteotomy, either proximally or distally. We present a technique of combining a distal chevron osteotomy with a proximal opening wedge osteotomy, for the correction of moderate to severe hallux valgus. Patients and Methods. We reviewed 45 patients (49 feet) who had undergone double osteotomy. Outcome was assessed using the American Orthopaedic Foot and Ankle Society (AOFAS) and the Short Form (SF) -36 Health Survey scores. Radiological measurements were undertaken to assess the correction. The mean age of the patients was 60.8 years (44.2 to 75.3). The mean follow-up was 35.4 months (24 to 51). Results. The mean AOFAS score improved from 54.7 to 92.3 (p < 0.001) and the mean SF-36 score from 59 to 86 (p < 0.001). The mean hallux valgus and intermetatarsal angles were improved from 41.6. o. to 12.8. o. (p < 0.001) and from 22.1. o. to 7.1. o. , respectively (p < 0.001). The mean distal metatarsal articular angle improved from 23. o. to 9.7. o. The mean sesamoid position, as described by Hardy and Clapham, improved from 6.8 to 3.5. The mean length of the first metatarsal was unchanged. The overall rate of complications was 4.1% (two patients). Conclusion. These results suggest that a double osteotomy of the first metatarsal is a reliable, safe technique which, when compared with other metatarsal osteotomies, provides strong angular correction and excellent outcomes with a low rate of complications. Cite this article: Bone Joint J 2016;98-B:1202–7

The results of 34 knees with stage IV to VI Blount’s disease were reviewed. 24 patients were treated over the seven-year period from 1994 to 2000.

The surgical technique addressed the medial joint line depression with an elevating osteotomy maintained with a tricortical wedge from the iliac crest. The tibial varus and intorsion was corrected with an osteotomy proximal to the apophysis. In the more recent patients a proximal lateral tibial and fibular epiphyseodesis was done concomitantly. The average preoperative mechanical varus angle of 30.6°(range 14° to 60°) was corrected to 0–4° mechanical valgus in 29 knees. In five knees an undercorrection of 2–4° mechanical varus occurred. At follow-up a further 8 knees developed residual varus due to a delayed epiphyseodesis. The tibial varus angle (ie. angle subtended by the mechanical axis of the tibia with the lateral tibial joint line) increased at an average of 1°/ month due to the inevitable medial growth plate fusion.

The average pre operative joint depression angle of 49° (range 40° to 60°) was corrected to an average of 26°(mean 20°–30°). There was no significant preoperative frontal plane f emoral deformity to warrant a femoral correction. At long term follow up of 3.5 years (range 2 to 5 years) all knees had a full range of movement without any varus instability. However in eight cases a delay of more than six months occurred before a lateral epiphysiodesis was performed, and in these patient’s mechanical axis varus recurred although the joint line correction was maintained. Neutral or valgus mechanical axis was maintained in all patients who underwent an epiphysiodesis within six months.

We concluded that although the joint elevation correction was maintained in our series, mechanical axis varus recurs if lateral epiphysiodesis is not performed early.

Abstract. Introduction. Osteotomy is a recognised surgical option for the management of unicompartmental knee osteoarthritis. The effectiveness of the surgery is correlated with the accuracy of correction obtained. Overcorrection can potentially lead to excess load through the healthy cartilage resulting in accelerated wear and early failure of surgery. Despite this past studies report this accuracy to be as low as 20% in achieving planned corrections. Aim. Assess the effectiveness of adopting modern osteotomy techniques in improving surgical accuracy. Methodology. A prospective cohort study. Patients were identified who had undergone osteotomy surgery for unicompartmental knee OA using a standardised technique. The surgical techniques adopted to ensure accuracy included digital templating software (Orthoview), Precision saw(Stryker), bone wedge allograft and plate osteosynthesis (Tomofix). Pre and post operative analysis of standardised long leg X-rays was performed and the intended (I) and achieved(A) corrections were calculated. Results. A total of 94 (35F/59M) patients with a mean age of 52 years were identified who fulfilled the inclusion criteria for the study. 62 patients were treated with a tibial osteotomy, 21 with femoral and 11 with a double level osteotomy. Using a 10% acceptable range (AR) for error, in 89% of cases (84 of 94) the target Mikulicz point was achieved. Potential risk factors for overcorrection included female sex and osteotomy type, with a higher incidence of over correction observed with double level osteotomies (27%). Conclusion. This study demonstrates that meticulous digital software planning and surgical technique ensures accurate surgical correction in periarticular knee osteotomy surgery

Abstract. Introduction. Osteotomy is recognised treatment for osteoarthritis of the knee. Evidence suggests favourable outcomes when compared to arthroplasty, for younger and more active individuals[1]. Double level osteotomy (DLO) is considered when a single level is insufficient to restore both joint line obliquity and adequate realignment[2]. This paper aims to establish the functional outcomes up to two years post operatively for patients undergoing DLO, using patient reported outcome measures (PROMs). Methodology. All patients who underwent a DLO at either Lister Hospital, Stevenage, or One Hatfield Hospital, Hertfordshire, between 1st January 2018 and 1st October 2020 were identified. DLO were performed by two specialist consultants, independently or in combination. PROMs including pain scores, health score, Oxford knee score (OKS) and knee injury and osteoarthritis outcome score (KOOS) were recorded pre-operatively and at six month, one and two year post operative intervals. Results. 24 patients underwent DLO; a medial opening wedge high tibial osteotomy and lateral closing wedge distal femoral osteotomy. The cohort comprised 21 males, 3 females with an average age of 54.09 (38–77) years. Preoperative pain scores graded from 0–10 improved from 6.86 to 2.0 at 2 years. OKS improved from 23.94 to 47.88, as did KOOS 43.55 to 87.51, over the same duration. Conclusion. DLO was associated with improvements in pain and functional outcomes, compared to pre-operative levels. In patients for whom arthroplasty may be unfavourable, this provides an alternative to non-operative management, the options for which are frequently exhausted early in the disease process

Ponseti method has become the most common and validated initial non-operative and/or minimally invasive treatment modality of idiopathic clubfoot regardless of the severity of the deformity worldwide. Despite hundreds of publications in the literature favoring Ponseti method, the data about secondary procedures performed in the follow-up period of clubfoot and their incidence remains sparse and given as small details in the articles. The objective of this study was to analyse our incidence of secondary procedures performed in the midterm followup period of idiopathic clubfoot patients treated with Ponseti method and review of the relevant literature. For this purpose 86 feet of 60 patients with idiopathic clubfoot who were treated with original Ponseti method were enrolled in this retrospective case control study. Unilateral ankle foot orthosis (AFO) was used rather than standart bar-connected foot abduction orthosis varying from 12 months to 25 months in the follow-up period and 74 of 86 (86%) feet required percutaneous achilles tenotomy. The average age of initial cast treatment was 12.64 days (range 1 to 102 days). The mean follow-up time was 71 months (range 19 to 153 months). Thirty seven feet of 24 patients recieved secondary procedures (43%) consisting of; supramalleolary derotational osteotomy (SMDO) (1 patient/2 feet), complete subtalar release (3 patients/5 feet), medial opening lateral closing osteotomy (double osteotomy) (2 patients/3 feet), double osteotomy with transfer of tibialis anterior tendon (TTAT) (2 patients/3 feet), partial subtalar release (PSTR) (3 patients/5 feet), PSTR with SDO (1 patient/1 foot), posterior release (PR) with repeated achillotomy (1 patient/2 feet), TTAT (6 patients/10 feet), TTAT with PR (2 patients/2 feet), TTAT with Vulpius procedure (1 patient/1 foot) and TTAT with SMDO (2 patients/3 feet) respectively. The amount of percutaneous achilles tenotomy (86%) in our study correlated with the literature which ranged from 80 to 90 %. The transfer of tibialis anterior tendon continued to be the most performed secondary procedure both in our study (51%) and in the literature, but the amount of total secondary procedures in our study (43%) was determined to be higher than the literature data varying from 7 to 27 percent which may be due to unilateral AFO application after Ponseti method for idiopathic clubfoot deformity in our study

Objective. Combined metatarso-phalangeal and inter-phalangeal deformity represents about 1% of hallux valgus deformity, and its treatment remains a debated topic, because a single osteotomy does not entirely correct the deformity and double osteotomies are needed. The aim of this study is to review the results of 50 consecutive combined metatarso-phalangeal and inter-phalangeal hallux valgus treated by Akin proximal phalangeal osteotomy and SERI minimally invasive distal metatarsal osteotomy. Material and Methods. Fifty feet in 27 patients, aged between 18 and 75 years (mean 42 years) affected by symptomatic hallux valgus without arthritis were included. Two 1-cm medial incisions were performed at the metatarsal neck and at proximal phalanx. Then SERI osteotomy was performed to correct metatarso-phalangeal deformity and Akin osteotomy was performed to correct interphalangeal deformity. Both osteotomies were fixed with a single K-wire. A gauze bandage of the forefoot was applied and immediate weight-bearing on hindfoot was allowed. K-wire was removed after 4 weeks. All patients were checked at a mean 4 year follow-up. Results. All osteotomies healed. Delayed union of metatarsal osteotomy was observed in 1 foot. Slight stiffness was observed in 2 feet. Mean AOFAS score was 47±15 preoperatively and 91±9 at last follow-up. Radiographic findings revealed a significant improvement (p<0.005) of interphalangeal-angle (pre-op 17.5°, post-op 5.1°), hallux-valgus-angle (pre-op 30.1°, post-op 12.2°), inter-metatarsal-angle (pre-op 13.4°, post-op 7.1°), distal-metatarsal-articular-angle (pre-op 20.1°, post-op 8.2°). Conclusions. The combined SERI-Akin double osteotomy was an useful procedure for correction of complex hallux valgus deformity. Clinical and radiographic findings showed an adequate correction of all parameters of the deformity

Osteotomies for valgus deformity are much less frequent than those for varus deformity as evidenced by published series which are, on one hand, less numerous and on the other hand, based on far fewer cases. For genu varum deformity, it has been proved that navigation allows to reach easier the preoperative correction goal. Our hypothesis was that navigation for genu valgum could be as accurate as for genu varum deformity. The aim of this paper was to present the mid-term results of 29 computer-assisted osteotomies for genu valgum deformity performed between September 2001 and March 2013. The series was composed of 27 patients (29 knees), 20 females and 7 males, aged from 15 to 63 years (mean age: 42.4+/−14.3 years). The preoperative functional status was evaluated according to the Lyshölm-Tegner score. The mean score was of 64+/−20.5 points (18–100). The stages of osteoarthritis were evaluated according to modified Ahlbäck's criteria. We operated on 12 stage 1, 9 stage 2, 5 stage 3 and 1 stage 4. 2 female patients had no osteoarthritis but a particularly unesthetic deformity (of which one was related to an overcorrected tibial osteotomy). The pre and postoperative HKA angle was measured according to Ramadier's protocol. We measured also the medial tibial mechanical angle (MTMA) and the medial femoral mechanical angle (MFMA). The mean preoperative HKA angle was 189.3°+/−3.9° (181° to 198°); the mean MFMA was 97.2° +/− 2.6° (93° to 105°) and the mean MTMA was 90.1° +/− 2.8° (86° to 95°). The goal of the osteotomies was to obtain an HKA angle of 179° +/− 2° and a MTMA of 90°+/2° in order to avoid an oblique joint line. We performed 24 femoral osteotomies (14 medial opening wedge and 10 lateral closing wedge) and 5 double osteotomies (medial tibial closing wedge + lateral opening wedge osteotomy). The functional results were evaluated according to Lyshölm-Tegner, IKS and KOO Scores, which were obtained after revision or telephone call. We did not find any complication except a transient paralysis of the common fibular nerve. 23 patients (4 lost to follow-up) were reviewed at a mean follow-up of 50.9+/−38.8 months (6–144). The mean Lyshölm-Tegner score was 92.9+/−4 points (86–100), the mean KOO score 89.7+/−9.3 (68–100), the mean IKS ≪knee≫ score 88.7 +/−11.4 points (60 à 100) and the mean ≪function≫ score 90.6 +/−13.3 points (55–100). 22 of the 23 reviewed patients (25 knees) were very satisfied or satisfied of the result. Regarding the radiological results, the mean HKA angle was of 180.1°+/−1.9° (176° to 185°), the mean MFMA of 90.7°+/−2.5° (86°-95°) and the mean MTMA of 89.1°+/−1.9° (86°-92°). The preoperative goal was reached in 86.2% (25/29) of the cases for HKA angle and in 100% of the cases for MTMA when performing double level osteotomy (5 cases). At this follow-up, no patient was revised to TKA. Computer-assisted osteotomies for genu valgum deformity lead to excellent results a mid-term follow-up. Navigation is very useful to reach the preoperative goal

Background. CRUS is difficult to treat. Many techniques have been tried in an effort to restore forearm rotation; however, they have not been successful. It is inadvisable by many authors to perform any operation with the hope of obtaining pronation and supination. Patients and Methods. Eleven children; 3 - 8 years old with CRUS, Wilkie type I, with fixed full pronation deformity were managed by the new ALLAM'S OPERATION which is a one stage intervention including separation of the bony fusion, special cementation technique of the ulnar (or radial) side of the osteotomy, double osteotomy of the radius and a single osteotomy of the ulna (all of the 3 osteotomies were done percutaneously) with intramedullary K. wire fixation of osteotomies at the mid-prone position and above elbow cast application for 6 weeks. Results. Excellent significant functional range of forearm rotation was obtained with no significant complications after a follow-up period of 3 – 4 y. (average: 3.2 m). Summary. The new ALLAM'S OPERATION is a one stage intervention for CRUS, (Wilkie type I, with fixed full pronation deformity) with significant obtained active functional range of forearm rotation with no significant complications after an average follow-up period of more than 3 years

Some arthritic knees with varus deformity show excessive valgus angulation of the femoral joint surface with proximal tibia vara. This causes a downward and medial inclination of the articular surfaces in the coronal plane. The patients we studied had a medial shift of the standing load-bearing axis, and arthritic changes mainly in the medial compartment. Some also had lateral tibial subluxation with twisting of the distal femur and proximal tibia in opposite directions. We assessed the articular geometry by precise radiographic analysis, and compared the results with those in normal volunteers and a group of osteoarthritic patients. The prevalence of this type of deformity in our osteoarthritic patients was 11.5%; its recognition allows the use of specific operative correction that may include double osteotomy or the precise orientation of prosthetic components

Introduction: We present 34 patients diagnosed with hallux rigidus treated by percutaneous surgery. We analyzed the surgical techniques used and the functional results achieved. Materials and methods: We retrospectively collected 34 patients (24 women). Patients were stratified by means of parametric x-rays (Hanft classification from 1 to 4). Treatment consisted in a double osteotomy, also known as Keller’s technique, using percutaneous procedures. The postoperative protocol consisted of walking, use of orthopedic footware, and early mobilization. Results: Mean age was 68.78 years and mean follow-up was 31.45 months. Mean time from first clinical visit to surgery was 4.38 years; most patients had received conservative treatment. The mean degree of hallux rigidus according to the standard classification was 2.5. The mean value of the metacarpophalangeal joint arc and interphalangeal joint arc was 40.35°and 52.14° respectively. Return to work activities was achieved in 90.9%. The mean value according on the VAS (visual analogue scale) (0–10) was 3.14. The mean value on the AOFAS scale was 62.57 (0–100). Conclusions: Percutaneous surgery is a satisfactory method for the treatment of hallux rigidus, enabling the patient to quickly return to work. This procedure avoids the use of osteosynthesis materials and minimizes the complications seen in open surgery

Introduction and Objectives: The technique modified by Regnauld makes it possible to correct the MTP angle and the DASA, shorten the first phalange preserving the MTP joint, and its articular congruence and functionality. Assessment of results at 2 years follow-up of 147 cases treated with this technique. Materials and Methods: Causes: Hallux Valgus 111; Hallux Rigidus 36. Sex: Women 114, men 33. mean age 70 years. Associated surgery: Proximal chevron-type osteotomy of the first MTT: 23; Scarft-type diaphyseal osteotomy: 1; osteotomy of the base of the first MTT: 11; double osteotomy: 5; subcapital Weils-type osteotomy: 15. Preoperative AOFAS test score 39.6. Mean follow-up 2.3 years. Pre and postoperative measurement of metatarsophalangeal angles. Postoperative assessment at 1 month, 6 m, 1 year and 2 years with X-ray, AOFAS scale. Results: Postoperative assessment using the AOFAS scale: < 1 month: 65, < 6 months: 78, < 1 year: 89, < 2 year: 82. AOFAS scale at 2 years: Moderate pain 2%. Narrow shoes 11%. Moderate MTP restriction 35%. Severe MTP restriction 2%. Infrequent mobility with severe IP restriction 9%. Asymptomatic malalignment 5%. Subjective assessment: Very satisfied 25%. Satisfied 68%. Not very satisfied 5% (occasional pain). Unsatisfied 2% (daily pain). The evolution of the values of the MTP angle were: preoperative MTP angle 34.7°, MTP angle 4 weeks postoperatively 8.1°, MTP angle at 1 year 14.7°, MTP angle at 2 years18.1°. Discussion and Conclusions: Satisfactory results (93%). This technique corrects the MTP angle, preserves the MTF joint and makes it possible to associate with it other surgical techniques to modify the intermetatarsal angle. By preserving the MTP joint we prevent early evolution of hallux rigidus. Very little loss of MTP correction at 2 years (10°), with no clinical correlation

Purpose: To determine the results and safety of patients undergoing|spinal cord level (SCL) pedicle subtraction osteotomy (PSO) for thetreatment of thoracic kyphosis. Methods: Retrospective chart and radiographic review of 25 patients with severe thoracic kyphosis. Results: The underlying diagnoses were: tumour (8), Scheuermann’s Kyphosis (4), degenerative/osteoporosis (3), fracture (3), inflammatory|(2), neurofibromatosis (2), congenital kyphosis (1), tuberculosis (1), and infected tumour (1). The osteotomy was combined with a lumbar PSO in|five patients. Three patients were treated with double thoracic|osteotomies. Two PSOs were extended transdiscally to debride the|infected disc. The mean focal PSO correction was 33.6° (range 9°–73°). The overall thoracic kyphosis measured from T5 to T12 improved from a|mean of 58.3° preoperatively to 37.1° postoperatively. Estimated blood|loss ranged from 400cc to 12500cc. All patients presenting with spinal|cord dysfunction neurologically improved postoperatively. There were 2 major neurological complications. One patient developed postoperative | progressive paraplegia following a prolonged period of intra- and | postoperative severe hypotension and coagulopathy. The other developed a| pseudoarthrosis five months postoperatively and suffered an incomplete|spinal cord injury during the subsequent revision. Other complications included: T3 radicular pain (1) -resolved; dural tears (2); respiratory failure -prolonged ICU admission(1); fractures proximal to the thoracic (2) and distal to lumbar (1) instrumentation; incomplete corrections of the sagittal alignment despite double osteotomies (2); wound breakdown associated with preoperative radiation (1).|. Conclusions: SCL-PSO is a feasible option for severe thoracic kyphosis. This procedure eliminates the need for anterior surgery; however, it does not reduce the potential for significant morbidity

Introduction: Because of strong loads acting in the elbow joint, intraarticular fractures with a methaphyseal comminuted fracture site at the distal humerus demand a lot from the osteosynthetic care. Ambiguities arise concerning to the anatomic position of the implants and the resulting mechanic performance. Aim of this study was the comparison of three anatomic variations of one angle stable plate system as to their mechanic stability. Material and Methods: As a fracture model an AO C 2.3-fracture on an artificial bone (4th Gen. Sawbone) was simulated via double osteotomy in sagittal and transversal plane. The fractures were equipped with a prototypical version of the Variax Elbow System (Stryker) in the variations 90° (lat+post), 90° (med+post) and 180° (med+lat). A physiological load distribution (Capitulum Humeri 60%, Trochlea humeri 40%) could be guaranteed for by a therefore designed test set up. In three test series, the load to failure (static), the system rigidity (static) and the median fatigue limit (dynamic) were determined. The tests were conducted under 75° flexion and 5° extension and the relative displacements were recorded. Results: In extension, the 180° (med+lat) alternative achieved the highest load to failure (2959 N), stiffness (1126 N ± 127 N) and median fatigue limit (1046 N ± 46 N) followed by the 90° (lat+post) alternative. Great differences could be stated with the 180° (me d+lat) alternative in extension in comparison to the flexion (p< 0,05): under flexion the failure already appeared at 1077N and the stiffness reduced to 116 N ± 10 N. The highest stiffness (202 N ±19 N) under flexion load could be determined for 90° (med+post). As to stiffness, the 90° (lat+post) alt ernative lay in between. Decreases of fracture gaps due to a failure of screw bone interface and a bending of plates could be determined as failure patterns in case of static load. Under dynamic load especially fatigue fractures occurred at the implant system in terms of broken plates and screws. Conclusion: In vivo the highest loads occur at the distal humerus in extension direction which can best be transferred, in static as well as in dynamic regard, by a 180° alternative. An alternative to that is the 90° (lat+post) variation due to its advantageous me chanic performance under static and dynamic extension load. But still the nature of fracture with size and position of the fragments useable remains decisive for the choice of an osteosynthesis. The mechanic superiority of the 180° alternative (minimized gap displacement and high stiffness of the system respectively) in extension direction in comparison to a 90° alternative can be explained by the 90° position of the plates and hence reduced moment of inertia. Less stiffness under flexion direction arises from the long levers, which cause high bending moments

Purpose: Surgery offers a remarkable means for modifying the physical appearance of people desiring more acceptable conformity with aesthetic standards. Height is a qualifying element for each individual. Society sometimes views persons with a short stature as different. Leg lengthening surgery to improve one’s appearance has thus become a common request. We report our experience to demonstrate that the objective is both possible to achieve and useful. Material and methods: From 1985 to 2000, we operated 54 patients (32 men and 22 women). Mean follow-up was five years three months (16 years – 1 year). For these patients, we found a valid justification for the request for increased height, while surgery was declined for 82 other patients. Mean age at surgery was 5.8 years (range 18–47) (28.1 years for men and 23.6 years for women). Mean height was 153 cm (159 for men and 147 for women). Patients were given psychological support. We performed simultaneous bilateral leg lengthening because of the better tolerance compared with the femur. The standard device had three rings and a proximal semi-ring. A two-level lengthening system was used, requiring double osteotomy, a proximal tibial metaphyseal osteotomy and a distal metaphyseal osteotomy. Seven days after trepan osteotomy and twelve days after Gigli saw osteotomy, we initiated the lengthening procedure with 1/4 turn (1/4 mm) three times a day. Achilles tendon lengthening was associated for 19 patients. For three patients (4 limbs) the regenerated bone collapsed requiring insertion of a new device. Results: Mean lengthening was 7 cm (11- 5 cm). Mean duration of treatment was eight months ten days. Aesthetic outcome was considered excellent by 92% of patients and good by 8%. Discussion: The patient’s desire for greater height must be well motivated and associated with good knowledge of possible risks (detailed informed consent). Using the circular device for leg lengthening allows correction of associated moderate alignment anomalies. Conclusion: If the patient has a valid psychological justification and an objective height below the mean of the local population, leg lengthening procedures can be performed for aesthetic purposes with reasonable risk and satisfactory results

Double level osteotomy (DLO) for severe genu varum is not a common technique. We performed our first computer-assisted double level osteotomy (CADLO) in March 2001 and we published our preliminary results in 2005 and 2007. The rationale to perform this procedure is to avoid oblique joint line in order to have less difficulty in case of revision to a total knee arthroplasty (TKA). The goal of this paper is to present the results of 37 cases operated on between August 2001 and January 2010. The series was composed of 35 patients (two bilateral), nine females and 26 males, aged from 39 to 64 years old (mean age: 50.5 +/− 7.5). We operated on 20 right knees and 17 left ones. The mean BMI was 29.3 +/− 4.3 for a mean height of 1.71 m and a mean weight of 85.8 kg. The functional status was evaluated according to the LYSHÖLM and TEGNER score. The mean score was of 42.4 +/− 8.9 points (22–69). According to modified AHLBÄCK criteria we operated on seven stage 2, 22 stage 3, five stage 4 and two stage 5. We measured HKA (Hip-Knee-Ankle) angle using RAMADIER's protocol and we also measured the femoral mechanical axis (FMA) and the tibial mechanical axis (TMA) to pose the right indication. These measures were respectively: 168° +/− 3.4° (159°–172°), 87.5° +/− 2.1 (83°–91°) for the FMA and 83.7° +/− 2.6° (78°–88°) for the TMA. The inclusion criteria were a patient younger than 65 years old with a severe varus deformity (more than 8° − HKA angle ≤ to 172°) and a FMA at 91° or less. All the osteotomies were navigated using the ORTHOPILOT® device (B-BRAUN-AESCULAP, TUTTLINGEN, GERMANY). The procedure was performed as follows: after inserting the rigid-bodies and calibrating the lower leg, we did first the femoral closing wedge osteotomy (from 4 to 7 mm) which was fixed by a an AO T-Plate, and secondly, after checking the residual varus, the high tibial opening wedge osteotomy using a BIOSORB® wedge (Tricalcium phosphate) and a plate (AO T-plate or C-plate). The goals of the osteotomy were to achieve an HKA angle of 182° +/− 2° and a TMA angle of 90° +/− 2°. The functional results were evaluated using the LYSHÖLM-TEGNER score and the KOOS score. The patients answered the questionnaire at revision or by phone, and the radiological results were assessed by plain radiographs and standing long leg X-Rays between three and six months postoperatively. We had no complication in this series but one case of recurrence of the deformity related to an impaction of the femoral osteotomy on the medial side. Two patients were lost to follow-up after removing of the plates (24 months) but were included in the results because the file was complete at that date. All the patients were assessed at a mean follow-up of 43 +/− 27 months (12–108). The mean LYSHÖLM-TEGNER score was 78.7 +/− 7.5 points (59–91) and the mean KOOS score was 94.9 +/− 3.3 points (89–100). Thirty-five patients were satisfied (18) or very satisfied (17) of the result. Only two were poorly satisfied. Regarding the radiological results, if we exclude the patient who had a loss of correction, the goals were reached in 32 cases (89%) for the HKA angle and in 31 cases (86%) for the TMA with only one case at 93°. The mean angles were: 181.97° +/− 1,89° (177°–185°) for HKA, 89.86° +/− 1,85° (85°–93°) for TMA and 93.05° +/− 2.3° (89°–99°) for FMA. At that mid-term follow-up no patient had revision to a total knee arthroplasty. DLO is a very demanding technique. Navigation can improve the accuracy of the correction compared to non computer-assisted osteotomies. The functional results are satisfying and the satisfaction of the patients is very high. Despite the difficulty of the procedure, complications are, in our hands, very rare. We recommend DLO for severe genu varum deformity in young patients to avoid oblique joint line, which will be difficult to revise to TKA

Osteotomies around the knee are still utilized a lot in Europe and in Asia while in US unicompartmental and total arthroplasty for the same indications have more and more taken over, partially due to fear of complications. We think that with careful planning and technique the indications can be maintained. Furthermore with modern methods of cartilage repair it is of utmost importance to unload overloaded compartments. Also many young patients having suffered ligamentous tears of the knee and having been reconstructed are in need of OT’s later on. Many of the poor results are due to absent or poor planning and to poor OT technique and fixation. Not every knee needs to be operated to an overcorrected position. While opening wedge OT has become trendy because of fewer neurological complications we think there are definite indications for closing wedge technique. In this lecture we would like to summarize the principles and the steps which are very personal and that are based on 20 years of practice. Indications for osteotomies around the knee. Varus Knee. Opening wedge osteotomy: Advantages: Rapid surgery, small incision, fast healing, precise correction. Indicated when:. Degree of OA moderate and angular correction of not > 8°. Useful in associated MCL Instability. Useful when open surgery on medial femoral condyle needed (Mosaicplasty). In case of associated ACL instability when tibial slope is not > 10°. Patella alta. Has a tendency to increase the tibial slope. We use tricortical grafts from the iliac crest where the base of the wedges in mm corresponds to the degrees of correction. A cervical spine AO plate with for screws is used for fixation. Creates less deformity of the proximal tibia which is an advantage for a later total knee. Increases the intraarticular pressure even when the MCL is cut or detached distally, without us knowing the effect on the degree of OA, no long term studies being known to us. Closing wedge osteotomy: Advantages: Allows higher degrees of correction. Degree of OA advanced, need for higher corrections. Useful when open surgery on lateral femoral condyle needed. In ACL instability when tibial slope must be corrected, because of need to break the medial cortical hinge a heavier implant is needed may be enforced by a sagital Ex.Fix. Patella baja. Corrections over 5 degrees need an OT of the proximal or distal fibula. We perform the resecting OT in the fibular neck, the proximal cut is incomplete removing only the anterior and lateral cortex, the distal cut is complete. This allows to shift the distal fragment proximally and in front of the proximal cortical shelf allowing nerve protection. For fixation of the tibial OT we use the 90° angled cannulated AO osteotomy plate, that is inserted over a 2,0 K wire using a specific “transporteur” in relation to the amount of correction. The OT is done using the precise AO osteotomy jig, cutting along 2,5 mm K wires inserted through the jig. The two cuts meet 5–10 mm short of the opposite cortex. The closing wedge OT creates more deformity, carries a certain risk of peroneal nerve injury and of compartment syndrome. Surgery must therefore been done very skilfully and demands expertise. All the studies about long term effect of HTO have been done one using closing wedge technique. Double Osteotomy. Indications:. For deformities of over 12° to avoid obliquity of the joint line otherwise created by tibial or femoral OT alone. When sagital deformity needs to be corrected together with frontal plane deformity, eg a flexum of 20° and a varus of 10°. Valgus knee. Closing wedge Osteotomy of the distal femur: Advantages are the potent fixation using the same plate as on the tibia leading to rapid healing. Approach is rather extensive. Indicated:. When deformity of valgus and sagital plane ( flexion contracture) need to be addressed. When valgus is marked ( in small deformities the OT can also be performed in the tibia). Opening wedge Osteotomy of the distal femur. Indicated:. When the deformity is small. When cartilage gestures need to be performed on the lateral femoral condyle. Planning of Osteotomies:. We use one leg standing films in ap, pa 45° flexion, and lateral projection, varusvalgus stress films with 15 kp (Telos) and Orthoradiogramm (hip-ankle). A potential contralateral opening on the standing film is compensated on the drawing by a push orthoradiogram which virtually brings both compartments into contact. For the varus knee the ideal crossing point of the mechanical xis sits at 30% in the lateral compartment, the centre between the tibial eminences being 0% the medial or lateral border of the tibia being 100%. This is the displacement corresponds to the classical 3° over-correction that is useful when the medial compartment is down to bone. This would be an overcorrection for the less damaged medial joint lines where however an OT may already be indicated. We therefore have prospectively studied and validated a more balanced approach. If the medial compartment in a varus knee has lost up to one third of his cartilage the axis is calculated to pass at 10% in the lateral compartment. If is down by two thirds it is meant to pass at 20% laterally. If it is totally worn it passes at 30%. The drawing for the high tibial OT on the orthoradiogram is simple:. Connect the centre of the femoral head with the point at 10, rsp. 20, rsp. 30% in the lateral compartment and prolong this new axis of the leg distally to a point lateral of the ankle joint. Now select the hinge joint for the opening or closing wedge OT 2–3 cm distal to the joint line and connect this point with the old and the new centre of the ankle. Measure the angle between the t line which corresponds to the amount of correction and the angle to open or resect. The planning for the varus OT of the distal femur in valgus deformity is somewhat more complicated but should aim at a correction which leaves a femorotibial valgus of 1–2°. Using these rules one is able to reach adequate correction

Introduction. what size of defect is optimal for creating an atrophic nonunion animal model has not been well defined. Our aim in this study was to establish a clinically relevant model of atrophic nonunion in rat femur by creation of a bone defect to research fracture healing and nonunion. Materials and methods. We used 30 male Fischer 344 rats (aged 10–11 weeks), which were equally divided into six groups. The segmental bone defects to a single femur in each rat were performed by double transverse osteotomy, and different sized defects were created by group for each group (1 mm, 2 mm, 3 mm, 4 mm, 5 mm and 6 mm). The defects were measured and maintained strictly by using an original external fixator. The periosteum for each defect was stripped both proximally and distally. Thereafter, these models were evaluated by radiology and histology. Radiographs were taken at baseline and at intervals of two weeks over a period of 8 weeks. Atrophic nonunion was defined as a lack of continuity and atrophy of both defect ends radiologically and histologically at eight weeks. Results. In the 1 mm defect group, all defects had healed. In the 2 mm group, one-fifth remained atrophic nonunion. In the 3 mm group, three-fifths had atrophic nonunion, and all of the defects of groups of 4 mm and over were atrophic nonunion. Conclusion. This study showed that we were able to predictively produce an atrophic nonunion animal model by creating defects of at least 4 mm in the Fischer 344 rat femur