Clinical Study Of Computer-aided Design And Three-dimensional Finite Element In Precise Surgical Treatment Of Benign Lesions Of Near-end Femur

Objective:To explore the method of computer-aided design combined with thr ee-dimensional finite element in precise resection and biomechanical rec onstruction of benign near-end femoral lesions,and to evaluate the valu e and prospect of computer-aided design combined with three-dimension al finite element in the accurate resection of benign proximal femoral di seases and biomechanical reconstruction.Methods:In this study,20 patients with primary diagnosis of near-end femoral lesions and further confirmation as benign femoral lesions after biopsy were selected and divided into computer-assisted traditional surgery group(5 males and 5 females),with age of 23 ? 51 years [(34.1 ± 7.9)years],and traditional surgery group(6 males and 4 females),with age of 23 ? 50 years [(35.5 ± 8.0)years] according to the order of admission.Patients in the computer-assisted group were treated with a preoperative plan followed by surgery made by computer-assisted design combined with three-dimensional finite element;patients in the traditional surgery group were treated with a preoperative plan followed by surgery made by conventional methods.The operation time,intraoperative blood loss,extent of tumor resection,incidence of postoperative complications,postoperative follow-up time,and MSTS score were recorded and compared between the two groups.Results:The general data of the patients had no statistical significance.The average operation time of the patients in the computer-assisted surgery group was [(67.0 ± 6.7)min],[(79.0 ± 9.9)min],respectively,and the difference had statistical significance(P < 0.05);the average intraoperative blood loss was [(192.0 ± 18.1)ml],[(222.0 ± 33.9)ml],respectively,and the difference had statistical significance(P < 0.05);the MSTS score was [(27.7 ± 0.8)points],[(26.8 ± 0.8)points],respectively,and the difference had statistical significance(P < 0.05);the postoperative follow-up time was [(18.1 ± 3.9)months],[(19.2 ± 3.6)months],respectively,and the difference had no statistical significance(p > 0.05);no postoperative complications such as infection,recurrent fracture,tumor recurrence,etc.were found in the two groups.The computer-assisted postoperative pathology confirmed that the tumor boundary did not exceed the edge of the submitted specimen.It was within the safety boundary.In the traditional surgery group,4 cases of tumor resection range exceeded the safety boundary found by postoperative pathology.The difference between the two groups was statistically significant(P < 0.05).Conclusion:Computer-aided design combined with three-dimensional finite element to make preoperative planning can accurately curette benign near-end femoral tumor and select appropriate internal fixation method to reconstruct the femoral bone defect area and restore the normal biomechanical relationship,which can better assist the surgical treatment,shorten the operation time and reduce the intraoperative blood loss;it has more advantages compared with the traditional surgical method and is worthy of being widely popularized in the clinical application.