The 'Ziran' wrap: reconstruction of critical-sized long bone defects using a fascial autograft and reamer-irrigator-aspirator autograft

Similarities and Differences of Induced Membrane Technique Versus Wrap Bone Graft Technique

BACKGROUND

There are no reports on the similarities and differences between induced membrane (IM) technique and wrap bone graft(WBG) technique.

OBJECTIVE

The aims of this study are to investigate the effects of IM technique and WBR technique in repairing segmental bone defects, and to analyze the similarities and differences between them.

MATERIALS AND METHODS

66 patients of tibial segmental bone defects treated by IM technique and WBG technique were retrospectively analyzed. Aged 13-69 years old with an average of 35.3 years old. IM technique was divided into early IM group (bone grafting at 6-8 weeks of bone cement filling) and late IM group (bone grafting after 8 weeks of bone cement filling). WBG was divided into titanium mesh group and line suturing cortical bone blocks group. There were 11 cases, 25 cases, 10 cases and 20 cases in the early IM group, late IM group, titanium mesh group and line suturing group, respectively. Bone healing, complications and functional recovery (Paley's method) were observed, the causes of nonunion and delayed union and factors affecting bone healing were analyzed.

RESULTS

There were no significant differences in terms of age, sex, defect length, course, fixation method, defect location and preoperative function of adjacent joints among the 4 groups. All patients were followed up for 12-50 months, with an average of 20.1 months. The clinical healing time of early IM group, late IM group, titanium mesh group and line suturing group were (5.81 ± 0.75) months, (7.56 ± 1.66) months, (7.50 ± 0.70) months and (7.81 ± 1.81) months, respectively, showing significant differences among the 4 groups (P = 0.005). However, only early IM group had significant difference with other groups (P < 0.05), while no significance was found between late IM group and WBR group, between titanium mesh group and suture group (P > 0.05). There were no significant differences in healing ration, complications and functional recovery of adjacent joints among the 4 groups (P > 0.05). There were 4 cases of nonunion and delayed union, all of which were caused by poor quantity or quality of bone graft or unstable bone graft or internal fixation.

CONCLUSION

Both IM technique and WBG technique are effective method for repairing segmental bone defects. In addition to mechanical encapsulation, early IM has biological osteogenesis. However, mechanical encapsulation is a common basis for repairing bone defects, and biological osteogenesis can enhance bone healing.

Management of Infected Nonunion of the Forearm by the Masquelet Technique

Purpose

Infected nonunion of the forearm bones is a challenge for the orthopedic surgeon on several fronts. The forearm itself is unique as the difficulties include the relation between restoration of shaft length with the anatomy and long-term functional outcome of adjacent joints, and the risk of elbow and wrist stiffness related to prolonged immobilization. The problem of infection is complex due to the presence of bone necrosis, segmental bone loss, sinus tract formation, fracture instability, and scar adhesion of the soft tissues. The ideal management method for these situations is still debated.

Materials and methods

We used the two-stage-induced membrane technique devised by Alain Masquelet for the management of these infected nonunion of 12 forearm bones.

Results

All 12 bones united uneventfully. The bones united in a period ranging from 6 to 12 months with a mean of 7.8 months.

Conclusion

Our results show that this technique addresses several of the challenges pertinent to the forearm nonunion simultaneously and results are uniformly predictable.

How to cite this article

Dhar SA, Dar TA, Mir NA. Management of Infected Nonunion of the Forearm by the Masquelet Technique. Strategies Trauma Limb Reconstr 2019;14(1):1–5.

Short-term Outcomes of Induced Membrane Technique in Treatment of Long Bone Defects in Iran

Introduction:

Severe defects in long bones can be caused by several factors such as trauma that lead to open wound and secondary infections after surgery. Induced membrane technique is one of the therapeutic strategies that can be used for these patients. Due to importance of this method and lack of information about this technique in Iran.

Aim:

this study was performed to investigate technical strengths and weakness of induced membrane technique.

Material and Methods:

This case series study conducted on 21 patients with bone defects in the femur and tibia and metatarsal bones referred to orthopedic clinic of Rasoul Akram Hospital, Tehran, Iran, for induced membrane surgery in 2012-2015. Demographic and clinical data were obtained using history, clinical examinations and observations for each patient. Union achievement was the main outcome of this study, which was confirmed by radiographic findings and physical examination. Obtained data was analyzed by SPSS ver. 16.

Results:

All patients were male except one and their mean age was 30.52 years old. Bone defects were in tibia, femur and metatarsus in 9, 9 and 3 patients, respectively. Three patients received soft tissue reconstruction with flap before induced membrane surgery. Age, defects size, cigarette addiction and drug use and delay to start the treatment had no significant effect on union status. In total, 90% of patients had successful surgery.

Conclusion:

using induced membrane technique in patients with defects in their long bone such as tibia, femur and metatarsus would lead to high success for reconstruction.