Accuracy of a Novel 3D‐Printed Patient‐Specific Intramedullary Guide to Control Femoral Component Rotation in Total Knee Arthroplasty

• DOI: 10.1111/os.12619
• Publication Date: 2020-02-22T22:41:48Z
• Authors: Mao‐lin Sun; Ying Zhang; Yang Peng; De‐jie Fu; Hua‐quan Fan; Rui He
• Keywords: Male; Patient-Specific Modeling; Rotation; Intramedullary guide; Prosthesis Design; Surgical transepicondylar axis; 03 medical and health sciences; 0302 clinical medicine; Prosthesis Fitting; Humans; Femur; Prospective Studies; Arthroplasty, Replacement, Knee; Aged; Orthopedic surgery; Aged, 80 and over; Rotational alignment; Patient‐specific instrumentation; Middle Aged; 3. Good health; 3D Printing; Total knee arthroplasty; Printing, Three-Dimensional; Clinical Articles; Female; RD701-811

Objective Total knee arthroplasty (TKA) is one of the most universal and effective means for treating terminal stage osteoarthritis (OA) knee. Accurate intramedullary guide femur basis distal femoral cuts. Determining surgical transepicondylar axis (sTEA) key to reconstruction rotational alignment, because correct alignment can place component in right position, balance flexion gap so that inner outer tension equal, get stability during process knee, enhance quality life patients. With development three‐dimensional printing (3DP) technology medical domain, application patient‐specific instrumentation (PSI) has become more common. The aim this study was evaluate accuracy a novel 3D‐printed control rotation TKA. Methods Eighty patients (65 females 15 males) with OA were included prospective randomized study. divided into two groups by random number table method, 40 each group. TKA assisted PSI (PSI group) conventional (conventional performed respectively. Clinical outcomes [operation time, postoperative drainage volume, duration drainage, Hospital Special Surgery score (HSS), American Knee Society (AKS)] radiological [hip‐knee‐ankle angle (HKA), posterior condylar (PCA), patella transverse axis‐femoral (PFA), depth guide] compared between within groups. Results group had less volume but longer operation time than ( P < 0.05). AKS HSS scores after surgery improved those before However, there no significant difference range motion (ROM) For results, HKA PFA both 0.05).The PCA closer 0°, which better But as well preoperative PFA. Conclusion short‐term clinical efficacy similar Although spent operation, it could assist align accurately.