Application Of 3D Printing Technique In Complicated Acetabular Fracture

Acetabular fractures account for about 0.7% of total body fractures,intra-articular fractures,complex anatomy,difficulty in displaying the operative field,and difficulty in surgery.Choosing the correct surgical approach and the anatomic reduction of the fracture block is the key to surgery.Adequate preoperative planning is essential for good clinical outcomes.The auxiliary treatment of 3D printing technology has brought new ideas for the surgical treatment of complex acetabular fractures.Objective:To investigate the clinical value of 3D printing technology in the treatment of complex acetabular fractures.Methods:We retrospectively analyzed the details of patients with complicated acetabular fractures who were treated surgically in our hospital between August 2015 and January 2017.Ten of the patients were assisted in the preparation of an acetabular physical model using 3D printing technology.There were 8 males and 2 females,with an average age of(43.0±12.9)years.All patients were physically modeled to simulate fracture reduction before surgery.Internal fixation process.Twenty-five patients underwent routine surgery.There were 21 males and 4 females.The average age was(45.5±12.8)years.All the operations were performed by the same senior doctor.The surgical operation time,intraoperative blood loss,and C-arm fluoroscopy times were recorded in detail.At the same time,the perioperative blood transfusion volume and postoperative surgical drainage volume were recorded,and the degree of satisfaction with reduction of the two groups of operations was compared.There was no significant difference in the general data between the 3D group and the conventional surgery group(P>0.05),which was statistically comparable.Results:The operation course of the 3D group was consistent with the preoperative planning and preoperative simulation.The average operation time of the 3D group and the conventional group was 177.0±51.2min and 234.0±72.5min,respectively.The average blood loss during the operation was 1150.0±250.6mL and 1528.0 respectively.±399.5 mL,the average perioperative blood transfusion volume was 880.0±214.9 mL,1328.8±642.6 mL,and the intraoperative C-arm fluoroscopic average was 8.8±2.1 and 11.4±3.1,and the above four items were in the 3D group and the conventional surgery group.The differences between the two groups were statistically significant(P<0.05).The average drainage volume was 329.0±111.7 mL and 394.4±267.3 mL.The Matta score was used to evaluate the imaging results of acetabular fractures: the excellent and good rates were 70%(7/10)and 72%(18/25)respectively.There was no significant difference between the data in the 3D group and the conventional surgery group(P>0.05).Conclusion:3D printing technology has a good feasibility in the surgical treatment of complex acetabular fractures.Through preoperative simulation operation,it can help the surgeon to design and optimize the surgical program,shorten the operation time and anesthesia time,and reduce intraoperative blood loss.,Reduce radiation exposure and improve surgical safety.