The application of inverted lateral clavicle locking compression plate for medial clavicle fractures: biomechanical study and clinical implementation.

BACKGROUND: There has been no absolute consensus on the optimal implant for fixation of medial clavicle fracture. The purpose of the present study was to test the biomechanical efficacy of inverted lateral clavicle locking compression plate (LCP-LC) in fixation of this specific fracture location by finite element analysis. METHODS: Transverse and comminuted medial clavicle fracture simulated models stabilized by three different devices including inverted LCP-LC, superior clavicle LCP (LCP-SC), and dual reconstruction (LCP-RP) with LCP-SC were investigated biomechanical performance under three loading conditions, i.e., axial compression, inferior bending, and axial torsion. RESULTS: EQV stress exhibited on implant and elastic strain at fracture site under inferior bending was greater than other loading cases. LCP-SC construct represented the greatest EQV stress and elastic strain. The inverted LCP-LC construct demonstrated lower EQV stress than the LCP-SC construct and was comparable to dual plating. Under axial compression and axial torsion, elastic strain produced from the inverted LCP-LC construct was comparable to dual plating, but greater than dual plating when subjected to inferior bending. CONCLUSION: By the results of FE analysis, inverted LCP-LC could be a potential application for fixation of clavicle fracture with short medial fragment.

Minimally invasive plate osteosynthesis via posterior approach for type B and C fractures of distal humeral shaft: surgical tactics and a clinical series.

The optimal technique and implant for fixation of multifragmentary fractures of the distal humeral shaft remain inconclusive. We describe the use of minimally invasive plate osteosynthesis (MIPO) via posterior approach and extra-articular distal humerus locking compression plate (LCP-EADH) fixation for 18 such fractures. All fractures were united with a mean union time of 17.6 weeks (range 12-20). Transient radial nerve palsy was demonstrated in 2 patients. Six patients had 5° varus angulation and 1 had 5° valgus angulation. Triceps power was Grade 5 in all patients. The mean arc of elbow motion was 127.5 degrees (range 115-140). Six patients had an excellent MEP score and 12 had a good MEP score. As the results, posterior MIPO and LCP-EADH fixation could be an alternative for multifragmentary fractures of the distal humeral shaft, particularly for fractures with a very short distal fragment.

Utilizing the various forms of the gastrocnemius muscle in fix & flap protocol: a reliable remedy for open proximal tibial fractures with accompanying soft tissue defect.

BACKGROUND: Open proximal tibial fractures accompanied by soft tissue loss are substantially challenging to accomplish both bony consolidation and wound healing. The authors retrospectively delineated the utility of the various forms of the gastrocnemius muscle in fix & flap regimen for management of such complicated injuries. METHODS: Thirty-one patients with open fracture accompanied by soft tissue loss of proximal tibia were managed by the protocol of fix & gastrocnemius flap. The collected data included implant for fixation, form of the gastrocnemius flap, postoperative complications, union time, and clinical assessment. RESULTS: According to fixation devices, lateral anatomical locking compression plates were selected in 28 cases, dual plates in 1, and interlocking nails in 2. According to the forms of the gastrocnemius flap, medial gastrocnemius flap was utilized in 22 cases, medial hemigastrocnemius flap in 2, medial myocutaneous gastrocnemius flap in 2, lateral gastrocnemius flap in 3, and combined medial and lateral gastrocnemius flaps in 2. All flaps completely survived without any flap-related complications. Fracture consolidation was established in all patients with an average period of 19.9 weeks (range 16-26). Surgical site infection occurred in 3 cases, and delayed union in 1. By functional score of Puno, 3 cases were determined to be excellent, 27 to be good, and 1 to be fair. CONCLUSION: Concurrent use of internal fixation and gastrocnemius flap reconstruction is a reliable and efficient protocol in managing open fractures with accompanying soft tissue defect of proximal tibia.

The utility of reverse distal femur locking compression plate in minimally invasive osteosynthesis for type C subtrochanteric fractures of the femur: technical description and a clinical series of 50 cases.

BACKGROUND: Establishing fracture consolidation and avoiding postoperative complications of comminuted subtrochanteric fractures of the femur are technically challenging. The authors delineated a technical description of minimally invasive plate osteosynthesis (MIPO) by using a reverse distal femur locking compression plate (LCP-DF) and retrospectively reviewed the outcomes of these particular fractures. METHODS: Fifty patients with 51 type C subtrochanteric fractures of the femur were operated on by MIPO and reverse LCP-DF fixation. The collected data included postoperative complications, union times, and clinical outcomes. RESULTS: All fractures were united with a mean union time of 19.4 weeks (range 16-22). Regarding postoperative complications, asymptomatic valgus angulation occurred in five patients and trochanteric pain in six. According to Harris hip score, nine patients were determined to be excellent, 36 to be good and five to be fair. CONCLUSION: MIPO by reverse LCP-DF is reliable and effective for type C subtrochanteric fractures of the femur particularly in situations where intramedullary nailing is not feasible.

Single lag screw and reverse distal femur locking compression plate for concurrent cervicotrochanteric and shaft fractures of the femur: biomechanical study validated with a clinical series.

BACKGROUND: The optimal surgical management of concurrent cervicotrochanteric and shaft fractures of the femur has not been consensual. The authors investigated the reliability of combined single lag screw and reverse distal femur locking compression plate (LCP-DF) by finite element (FE) study and retrospectively described the present technique for these dual fractures. METHOD: Intact femurs were derived from CT data, and the implant models were created by using CAD software. The fractured femur and implant models were virtually aligned based on the surgical techniques before converting to the FE model. In the FE model, applied boundary conditions included body weight, muscle forces, and constraint of the joints. Regarding clinical series, three patients with these dual fractures of the femur and 2 with cervicotrochanteric fractures with subtrochanteric extension were operated on by the proposed technique. The collected data include operative time, postoperative complications, union times, and clinical outcomes. RESULTS: Equivalent von Mises stress exhibited on dynamic hip screws with an anti-rotational screw was higher than the other techniques, close to the yield stress of the material. Multiple screw fixation produced better stability for transcervical fractures whereas the proposed technique of combined single lag screw and reverse LCP-DF provided better stability for intertrochanteric fractures. No significant difference in cortical bone stress was found between multiple screw construct and the proposed technique. The proposed technique presented a lower risk of secondary fractures, as the strain energy density (SED) in cancellous bone was lower than multiple screw construct. Regarding clinical series, all fractures were united with a mean union time of-16.1 weeks (range 12-20). There were no any postoperative complications. Regarding the Harris score, 1 was determined to be excellent value, and 4 to be good. CONCLUSION: By the FE results, a combination of a single lag screw and reverse LCP-DF is an effective technique for fixation of cervicotrochanteric fractures. Empowered by the clinical results, this proposed technique could be an alternative for concurrent cervicotrochanteric and shaft fractures of the femur especially when either single-system or dual-system devices seem not to be suitable.

Minimally invasive plate osteosynthesis without floating segment fixation for segmental fracture of femur.

Segmental fractures of the femur are technically difficult to manage by intramedullary nailing, the gold standard treatment. We specifically describe minimally invasive plate osteosynthesis (MIPO) without floating segment fixation for this particular fracture pattern. Twenty patients with segmental fractures of the femur were operated on by the MIPO technique. Data were collected on operative time, postoperative complications, union times, and clinical outcomes. The mean operative time was 63.5 minutes (range 50-90). There were no peri-operative complications. All fractures were united with a mean union time of 16.1 weeks (range 12-20). Regarding postoperative malalignment, limb shortening was demonstrated in 4 patients, valgus angulation in 2 and varus angulation in 3. One patient had a bent plate with 7°varus angulation. According to the Thoresen score, 13 were determined to be excellent values, 6 to be good and 1 to be fair. MIPO without floating segment fixation is a safe and effective alternative for segmental fractures of the femur especially in circumstances that are unsuitable or unfeasible for intramedullary nailing.

Simultaneous internal fixation and soft tissue coverage by soleus muscle flap and variances: a reproducible strategy for managing open fractures of tibial shaft.

BACKGROUND: The role of internal fixation and local muscle flaps for open tibial fractures is still not specifically determined. We describe the integration of internal fixation and soleus muscle flap for open fractures complicated with soft tissue loss of the tibial shaft. METHODS: Twenty-seven patients with Gustilo IIIB open fractures of the tibial shaft were operated on by internal fixation and soft tissue coverage by soleus muscle flaps and variances. Data were collected on types of implants, types of flaps, union time, postoperative complications, and objective clinical measurement. RESULTS: Regarding implants for fixation, plates and screws were selected in 22 patients, and intramedullary nails in 5. Proximally based soleus flap was used in 17 patients, hemisoleus in 6, and reversed hemisoleus in 4. All flaps survived and all fractures were united with a mean union time of 21.8 weeks (range 14-30). One patient had unplanned reoperations due to delayed union and equinus deformity of the ankle. All patients had good-to-excellent Puno functional score results. CONCLUSION: Internal fixation and soft tissue coverage, frequently referred to as 'fix and flap', by a local soleus muscle flap is safe and effective for open fractures accompanied with small-to-medium size soft tissue defect of the tibial shaft.

Combined medial gastrocnemius and hemisoleus flap: a reproducible alternative for open tibial fractures complicated with large or double soft tissue defects.

BACKGROUND: Utilization of combined local muscle flaps for Gustilo type IIIB open tibial fractures has not been clearly delineated. We describe a combination of medial gastrocnemius and hemisoleus flaps for managing open tibial fractures accompanying large or double soft tissue defects. METHODS: Twelve patients with Gustilo IIIB open fractures of the tibial shaft with large (9) or double (3) defects were operated on by fracture stabilization and combined medial gastrocnemius and hemisoleus flap coverage. Data were collected on types of implants, types of flaps, union time, postoperative complications, and Puno functional scores. RESULTS: Regarding implants for fixation, an intramedullary nail was used in three patients, plate and screws in five, combined plate and intramedullary nail in one, and definitive external fixation was used in three. Regarding soft tissue coverage, combined medial gastrocnemius and hemisoleus flaps were used in ten patients, combined hemigastrocnemius and hemisoleus in one, and combined medial gastrocnemius and reversed hemisoleus in one. All flaps survived, and all fractures were united with a mean union time of 19.7 weeks (range 16-24). Tip necrosis of the hemisoleus flap occurred in two patients. Regarding Puno functional score, one was determined to be excellent, nine was good and two was fair. CONCLUSION: Combined medial gastrocnemius and hemisoleus flaps are reliable and effective for open tibial fractures complicated with large or double soft tissue defects.

Concurrent internal fixation and soft tissue reconstruction by distally based sural flap: a practicable scheme for complex distal tibial fractures.

BACKGROUND: It is difficult to establish both fracture union and wound healing of open fractures complicated with soft tissue defects of the distal tibia. We describe the simultaneous use of internal fixation and soft tissue coverage by a distally based sural flap (DBSF) for these complex injuries. METHODS: Seventeen patients with Gustilo IIIB open fractures of the distal tibia were operated on by internal fixation and DBSF coverage. Data were collected on the size of the defect, time to fixation and soft tissue coverage or 'fix & flap', types of implant, time to union, postoperative complications and objective clinical measurement. RESULTS: The average size of the soft tissue defect after debridement was 6.4 × 8.4 cm2 (range 4.0-9.0 × 6.0-12.0). The mean time to fix & flap was 8.1 days (range 7-10). A medial precontoured plate was used in 8 patients and an anterolateral precontoured plate in 9. All fractures were united in a mean duration of 22.6 weeks (range 20-28). One patient had partial flap necrosis. Using the Puno functional score, 2 patients had excellent functional outcomes and 15 patients had good functional outcomes. CONCLUSION: Concurrent Internal fixation and soft tissue reconstruction by DBSF is effective and reproducible for Gustilo type III open fractures of the distal tibia even in cases of more than 50 cm2 soft tissue defects.