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A Biomechanical Research into Different Internal Fixations for Tibial Eminence Fracture and Microtreatment

Author: GanZuoDong
Tutor: DingJing
School: Kunming Medical College
Course: Surgery
Keywords: Eminence Anatomy Fracture Tension band Treatment Biomechanics
CLC: R687.3
Type: Master's thesis
Year: 2009
Downloads: 59
Quote: 0
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Abstract


Purpose design intercondylar eminence fractures minimally invasive treatment methods; production intercondylar eminence fractures animal models, biomechanics test comparing the fixation strength of different fixation methods for the treatment of intercondylar eminence fractures; further clinical follow-up of eminence fractures tension band fixation of long-term treatment efficacy. Method at room temperature, respectively anatomy four normal fresh adult knee and pig knees were measured and the anatomical features contrast eminence. 18-24 months old fresh pig knee specimen 40, the average weight of 125 to 150kg to establish pig knee Meyer Ⅲ eminence fracture model, and then randomly divided into four groups, placed in a refrigerator spare. Respectively 0.8mm wire AO4.5 × 35mm cannulated screws, PDS-II line and design their own tension band fixation of fracture fragments, then the pig femur in Japan Shimadzu AG-1 50KN Materials tensile testing machine (showing the value of accurate ± 0.5%) loaded intraday tibia placed homemade eccentric fixture analog 90 ° knee flexion when the line of the anterior drawer test, calculated by the high performance of the transmission side gathering machine records each pig knee largest anti Rally The strength and displacement values, the data collected by the SPSS 15.0 statistical software processing, the final findings of the trial. The clinical collection intercondylar spine fracture 43 cases, arthroscopic-assisted the tension with minimally invasive treatment, the postoperative effects in patients with clinical follow-up, compared with traditional fixed method between advantages and disadvantages. Results pig and human knee anatomy structure is basically the same alternative mechanical testing study is feasible. Small adults intercondylar spine area, as the main ligament attachment regions, before spines intercondylar area of ??about 18 ~~ 19mm intercondylar spines about 14 ~~ 15mm intercondylar ridge about 23 ~~ 29mm, therefore, once the fracture, select fixed limited internal fixation material should not be too large in diameter. The mechanical tests showed that the strength of the tension band fixation group was significantly better than the other three fixed, while the worst thread group fixed strength, no significant difference between wire fixation and screw fixation group. 40 cases of clinical intercondylar front spine fractures in patients with tension band fixation for the treatment achieved excellent results, a simple procedure, fixation, good knee function recovery. Conclusion biomechanical tests confirmed that the tension band fixation than traditional fixed firmly Clinical tension with auxiliary arthroscopic treatment of intercondylar eminence fractures is solid and good, but the method is simple, minimally invasive, fewer complications, the knee functional recovery; silk fixed Poor firmly, while theoretically screws firmly be wrong.

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CLC: > Medicine, health > Surgery > Orthopaedic Surgery ( movement system diseases,orthopedic surgery ) > Orthopedic surgery and surgery > Bone surgery
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