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Objective:To investigate the effect of periacetabular osteotomy (PAO) assisted by preoperative 3D printing planning on the treatment of early developmental dislocation of the hip (DDH).Methods:A retrospective study was conducted of the 39 patients (44 hips) with CROWE type Ⅰ DDH who had been treated at Department of Orthopaedics, Guizhou Provincial People＇s Hospital from May 2015 to April 2019. In the observation group of 19 patients (22 hips) who were treated by PAO assisted by preoperative 3D printing planning, there were 4 males (4 hips) and 15 females (18 hips) with a mean age of 23(19, 39) years; in the control group of 20 patients (22 hips) who were treated by mere PAO, there were 2 males (2 hips) and 18 females (20 hips) with a mean age of 23(20, 29) years. The 2 groups were compared in terms of operation time, intraoperative bleeding, hospital stay, fluoroscopic frequency, Wiberg lateral center-edge angle (LCE), acetabular index (AC), acetabulum coverage rate, Harris hip scores (HHS) and complications at the final follow-up.Results:There were no significant differences between the 2 groups in their preoperative general data, showing compatibility of the 2 groups ( P>0.05). Both groups were successfully followed up for 6 to 12 months (mean, 9.6 months). The operation time [100 (90, 120) min], intraoperative bleeding [160 (150, 180) mL], hospital stay [6 (5, 7) d], and fluoroscopic frequency [24 (22, 25) times] in the observation group were all significantly better than those in the control group [140 (100, 157) min, 200 (180, 250) mL,9(7, 11) d and 28 (24, 32) times] in the control group ( P<0.05). However, there were no significant differences between the 2 groups in LCE, AC or acetabulum coverage rate immediately after operation, or in HHS or complications at the final follow-up( P>0.05). Conclusions:Although PAO has a definite therapeutic effect on early DDH, PAO assisted by preoperative 3D printing planning can effectively reduce operation time, intraoperative bleeding, hospital stay and intraoperative fluoroscopy. Thus, combination of the two can result in a better therapeutic effect than PAO alone.
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Objective To investigate the efficacy of CT scanning for 3D reconstruction and 3D printing in the internal fixation for in situ femoral condyle fractures.Methods A retrospective study was conducted of the 111 patients with in situ femoral condyle fracture who had been treated by internal fixation at Department of Traumatic Orthopaedics,The First People's Hospital of Hefei from June 2013 to January 2018.They were 59 males and 52 females,aged from 20 to 59 years(average,47 years).In 74 of them (observation group),the internal fixation was assisted by 3D printing using 3D images.There were 38 males and 36 females with an age of 44.5 ±4.7 years;there were 20 cases of type C1,40 cases of type C2 and 14 cases of type C3 according to the AO classification.In the other 37 patients (control group),the operation was assisted only by 3 D scanning.There were 21 males and 16 females with an age of 43.1 ±4.6 year;there were 8 cases of type C1,19 cases of type C2 and 10 cases of type C3 according to the AO classification.The 2 groups were compared in terms of operation time,clinical fracture healing time,intraoperative blood loss,hospital stay,number of fluoroscopy,knee joint score of Hospital for Special Surgery (HSS),fixation modes and postoperative complications.Results There were no significant differences in the preoperative general data between the 2 groups,showing comparability (P ＞ 0.05).All the patients were followed up for 8 to 12 months (average,10.6 months).The observation group had significantly shorter operation time (62.3 ± 4.7 minutes),fracture healing time (21.2 ± 3.4 weeks) and hospital stay (14.9 ± 3.3 days) than the control group (89.5 ± 6.0 minutes,25.1 ± 3.5 weeks,23.5 ± 3.5 days) (P ＜ 0.05).In the observation group,the intraoperative blood loss (84.1 ± 11.1 mL),fluoroscopy number (2.1 ±0.3 times) and HSS score (94.1 ± 4.2 points) were significantly less than those in the control group (129.6 ± 14.7 mL,4.7 ± 0.4 times and 86.5 ± 4.6 points) (P ＜ 0.05).There were no significant differences between the 2 groups in the use of L type iliac plate,dynamic iliac screws,retrograde interlocking intramedullary nail or minimally invasive internal fixation system (P ＞ 0.05).There were no significant differences in abnormal healing,joint adhesion,fixation fracture or incision infection between the 2 groups either (P ＞ 0.05).Conclusions CT scanning for 3D reconstruction can be used for multi-angle observation of the bone fragments in patients with femoral condyle fracture and 3D printing based on 3D reconstruction for manufacture of physical model of individualized fracture to assist the internal fixation.Combination of the two can help choose an appropriate fixation mode to facilitate fracture reduction.
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After the current situation in medical information construction and the training of health information management undergraduates in Anhui Province were analyzed, suggestions were put forward, such as further strengthening the training of health information management professionals and establishing their positions in medical information construction, in terms of new student enrolment, offered curriculum, and graduate employment.