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Tomoyuki Saito - One of the best experts on this subject based on the ideXlab platform.
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navigated opening wedge high tibial osteotomy improves intraoperative correction angle compared with Conventional Method
Knee Surgery Sports Traumatology Arthroscopy, 2012Co-Authors: Yasushi Akamatsu, Naoto Mitsugi, Yuichi Mochida, Naoya Taki, Hideo Kobayashi, Ryouhei Takeuchi, Tomoyuki SaitoAbstract:The correction angle after high tibial osteotomy (HTO) depends on an accurate preoperative planning and an accurate intraoperative technique. We hypothesized that the use of a navigation system in opening wedge HTO would improve the intraoperative target angles in the coronal and sagittal planes. Postoperative femoro-tibial angle (FTA) and tibial posterior slope (TPS) in 28 knees with navigated opening wedge HTO were compared to those in 31 knees with the Conventional Method. Intraoperative correction angle was determined by the predicted medial opening width in the Conventional group, and by the change of hip-knee-ankle angle in the navigated group. We defined lateral unstable knee as the knees with lateral cortex breakage or lateral tibial plateau fracture. Mean postoperative FTA was higher in the Conventional group than in the navigated group (P 173°. Mean change in TPS was greater in the Conventional group than in the navigated group (P = 0.001). The navigation system in opening wedge HTO might reduce undercorrection in the knees with lateral cortex breakage or lateral tibial plateau fracture, and provide the better intraoperative FTA and TPS. III.
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navigated opening wedge high tibial osteotomy improves intraoperative correction angle compared with Conventional Method
Knee Surgery Sports Traumatology Arthroscopy, 2012Co-Authors: Yasushi Akamatsu, Naoto Mitsugi, Yuichi Mochida, Naoya Taki, Hideo Kobayashi, Ryouhei Takeuchi, Tomoyuki SaitoAbstract:Purpose The correction angle after high tibial osteotomy (HTO) depends on an accurate preoperative planning and an accurate intraoperative technique. We hypothesized that the use of a navigation system in opening wedge HTO would improve the intraoperative target angles in the coronal and sagittal planes.
Yasushi Akamatsu - One of the best experts on this subject based on the ideXlab platform.
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navigated opening wedge high tibial osteotomy improves intraoperative correction angle compared with Conventional Method
Knee Surgery Sports Traumatology Arthroscopy, 2012Co-Authors: Yasushi Akamatsu, Naoto Mitsugi, Yuichi Mochida, Naoya Taki, Hideo Kobayashi, Ryouhei Takeuchi, Tomoyuki SaitoAbstract:The correction angle after high tibial osteotomy (HTO) depends on an accurate preoperative planning and an accurate intraoperative technique. We hypothesized that the use of a navigation system in opening wedge HTO would improve the intraoperative target angles in the coronal and sagittal planes. Postoperative femoro-tibial angle (FTA) and tibial posterior slope (TPS) in 28 knees with navigated opening wedge HTO were compared to those in 31 knees with the Conventional Method. Intraoperative correction angle was determined by the predicted medial opening width in the Conventional group, and by the change of hip-knee-ankle angle in the navigated group. We defined lateral unstable knee as the knees with lateral cortex breakage or lateral tibial plateau fracture. Mean postoperative FTA was higher in the Conventional group than in the navigated group (P 173°. Mean change in TPS was greater in the Conventional group than in the navigated group (P = 0.001). The navigation system in opening wedge HTO might reduce undercorrection in the knees with lateral cortex breakage or lateral tibial plateau fracture, and provide the better intraoperative FTA and TPS. III.
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navigated opening wedge high tibial osteotomy improves intraoperative correction angle compared with Conventional Method
Knee Surgery Sports Traumatology Arthroscopy, 2012Co-Authors: Yasushi Akamatsu, Naoto Mitsugi, Yuichi Mochida, Naoya Taki, Hideo Kobayashi, Ryouhei Takeuchi, Tomoyuki SaitoAbstract:Purpose The correction angle after high tibial osteotomy (HTO) depends on an accurate preoperative planning and an accurate intraoperative technique. We hypothesized that the use of a navigation system in opening wedge HTO would improve the intraoperative target angles in the coronal and sagittal planes.
Changhun Sung - One of the best experts on this subject based on the ideXlab platform.
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medial opening wedge high tibial osteotomy using a kinematic navigation system versus a Conventional Method a 1 year retrospective comparative study
Knee Surgery Sports Traumatology Arthroscopy, 2009Co-Authors: Sungjae Kim, Yonggon Koh, Yongmin Chun, Yongchan Kim, Youngsik Park, Changhun SungAbstract:High tibial osteotomy is a realignment procedure to transfer weight-bearing load to the intact compartment of the knee to alleviate symptoms, slow disease progression, and defer subsequent total knee arthroplasty. To prevent overcorrection or undercorrection, it is not only important to have an exact preoperative calculation of the desired correction angle, but it is also critical to have an accurate intraoperative technique. 85 consecutive patients (90 knees) were enrolled, who were available at 1-year follow-up after a medial opening wedge high tibial osteotomy using a kinematic navigation system or a Conventional Method, for medial unicompartmental osteoarthritis. On radiographic assessment, the navigation group showed better results than the Conventional group in both the mechanical axis and the coordinate of the weight-bearing line on a full-length standing anteroposterior radiograph (3.9° ± 1.0° vs. 2.7° ± 2.2° of valgus, P < 0.01), (62.3 ± 2.9% vs. 58.7 ± 6.6% coordinate at the tibial plateau, P < 0.01). There was no significant difference in the alteration of tibial slope between the two groups. On clinical assessment, the navigation group showed better results in both the mean Hospital for Special Surgery knee score (84 ± 8 vs. 79 ± 7, P < 0.01) and the mean Lysholm knee score (85 ± 6 vs. 83 ± 5, P < 0.05). There was no significant difference in operation times between the two groups. Kinematic navigation-guided high tibial osteotomy is a reproducible and reliable procedure compared to Conventional high tibial osteotomy.
Yunjaie Choi - One of the best experts on this subject based on the ideXlab platform.
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structural growth rumen development and metabolic and immune responses of holstein male calves fed milk through step down and Conventional Methods
Journal of Dairy Science, 2007Co-Authors: M A Khan, H J Lee, W S Lee, Hasuck Kim, T Y Hur, Gukhyun Suh, S J Kang, Yunjaie ChoiAbstract:Abstract Structural growth, feed consumption, rumen development, metabolic response, and immune response were studied in Holstein calves fed milk through either a Conventional Method or a step-down (STEP) Method. In the Conventional Method, calves (n = 20) were fed colostrum and then milk at a rate of 10% of their BW for the entire period of 44 d. In the STEP Method, calves (n = 20) were given colostrum and then milk at a rate of 20% of their BW for 23 d, which was reduced (between d 24 to 28) to 10% of their BW for the remaining 16 d. The calves on both Methods were weaned gradually by diluting milk with water between d 45 and 49. After weaning, feed consumption, structural growth, and body weight gain were monitored until calves were 63 d of age. At d 63, twelve calves (6/treatment) were euthanized and rumen papillae length, papillae width, rumen wall thickness, and emptied forestomach weight were recorded. At wk 4, 7, and 9, ruminal contents were collected to enumerate rumen metabolites. The STEP-fed calves consumed a greater amount of milk than Conventionally fed calves during the pre-STEP (d 1 to 28), post-STEP (d 29 to 49), and preweaning (d 1 to 49) periods. Consumption of starter and hay was greater during the pre-STEP period and lesser during the post-STEP and postweaning (d 50 to 63) periods in calves on the Conventional Method than on the STEP Method. Body weight gain and structural growth measurements of calves were greater on the STEP Method than on the Conventional Method. A hypophagic condition caused by greater milk consumption depressed solid feed intake of STEP-fed calves during the pre-STEP period, and a hyperphagic response caused by a reduced nutrient supply from milk triggered their consumption of solid feed during the post-STEP and postweaning periods. Ruminal pH and concentrations of ammonia, total volatile fatty acids, acetate, propionate, butyrate, and plasma β -hydroxybutyrate were higher in calves on the STEP Method and at weaning and postweaning (d 63) were lower in calves on the Conventional Method. Emptied weight of the forestomach, rumen wall thickness, papillae length, papillae width, and papillae concentration were higher in calves on the STEP Method than in those on the Conventional Method. Blood glucose was lower, and blood urea nitrogen and β -hydroxybutyrate at weaning and postweaning were higher in STEP-fed calves. Serum IgG, IgA, and triglycerides for 1, 2, and 3 wk of age were higher in calves on the STEP Method than in those on the Conventional Method. In conclusion, greater feed consumption, BW gain, and structural growth, and a more metabolically and physically developed rumen were observed in calves on the STEP Method than in those on the Conventional Method.
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structural growth rumen development and metabolic and immune responses of holstein male calves fed milk through step down and Conventional Methods
Journal of Dairy Science, 2007Co-Authors: M A Khan, H J Lee, W S Lee, Hasuck Kim, T Y Hur, Gukhyun Suh, S J Kang, Yunjaie ChoiAbstract:Structural growth, feed consumption, rumen development, metabolic response, and immune response were studied in Holstein calves fed milk through either a Conventional Method or a step-down (STEP) Method. In the Conventional Method, calves (n = 20) were fed colostrum and then milk at a rate of 10% of their BW for the entire period of 44 d. In the STEP Method, calves (n = 20) were given colostrum and then milk at a rate of 20% of their BW for 23 d, which was reduced (between d 24 to 28) to 10% of their BW for the remaining 16 d. The calves on both Methods were weaned gradually by diluting milk with water between d 45 and 49. After weaning, feed consumption, structural growth, and body weight gain were monitored until calves were 63 d of age. At d 63, twelve calves (6/treatment) were euthanized and rumen papillae length, papillae width, rumen wall thickness, and emptied forestomach weight were recorded. At wk 4, 7, and 9, ruminal contents were collected to enumerate rumen metabolites. The STEP-fed calves consumed a greater amount of milk than Conventionally fed calves during the pre-STEP (d 1 to 28), post-STEP (d 29 to 49), and preweaning (d 1 to 49) periods. Consumption of starter and hay was greater during the pre-STEP period and lesser during the post-STEP and postweaning (d 50 to 63) periods in calves on the Conventional Method than on the STEP Method. Body weight gain and structural growth measurements of calves were greater on the STEP Method than on the Conventional Method. A hypophagic condition caused by greater milk consumption depressed solid feed intake of STEP-fed calves during the pre-STEP period, and a hyperphagic response caused by a reduced nutrient supply from milk triggered their consumption of solid feed during the post-STEP and postweaning periods. Ruminal pH and concentrations of ammonia, total volatile fatty acids, acetate, propionate, butyrate, and plasma beta-hydroxybutyrate were higher in calves on the STEP Method and at weaning and postweaning (d 63) were lower in calves on the Conventional Method. Emptied weight of the forestomach, rumen wall thickness, papillae length, papillae width, and papillae concentration were higher in calves on the STEP Method than in those on the Conventional Method. Blood glucose was lower, and blood urea nitrogen and beta-hydroxybutyrate at weaning and postweaning were higher in STEP-fed calves. Serum IgG, IgA, and triglycerides for 1, 2, and 3 wk of age were higher in calves on the STEP Method than in those on the Conventional Method. In conclusion, greater feed consumption, BW gain, and structural growth, and a more metabolically and physically developed rumen were observed in calves on the STEP Method than in those on the Conventional Method.
Naoto Mitsugi - One of the best experts on this subject based on the ideXlab platform.
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navigated opening wedge high tibial osteotomy improves intraoperative correction angle compared with Conventional Method
Knee Surgery Sports Traumatology Arthroscopy, 2012Co-Authors: Yasushi Akamatsu, Naoto Mitsugi, Yuichi Mochida, Naoya Taki, Hideo Kobayashi, Ryouhei Takeuchi, Tomoyuki SaitoAbstract:The correction angle after high tibial osteotomy (HTO) depends on an accurate preoperative planning and an accurate intraoperative technique. We hypothesized that the use of a navigation system in opening wedge HTO would improve the intraoperative target angles in the coronal and sagittal planes. Postoperative femoro-tibial angle (FTA) and tibial posterior slope (TPS) in 28 knees with navigated opening wedge HTO were compared to those in 31 knees with the Conventional Method. Intraoperative correction angle was determined by the predicted medial opening width in the Conventional group, and by the change of hip-knee-ankle angle in the navigated group. We defined lateral unstable knee as the knees with lateral cortex breakage or lateral tibial plateau fracture. Mean postoperative FTA was higher in the Conventional group than in the navigated group (P 173°. Mean change in TPS was greater in the Conventional group than in the navigated group (P = 0.001). The navigation system in opening wedge HTO might reduce undercorrection in the knees with lateral cortex breakage or lateral tibial plateau fracture, and provide the better intraoperative FTA and TPS. III.
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navigated opening wedge high tibial osteotomy improves intraoperative correction angle compared with Conventional Method
Knee Surgery Sports Traumatology Arthroscopy, 2012Co-Authors: Yasushi Akamatsu, Naoto Mitsugi, Yuichi Mochida, Naoya Taki, Hideo Kobayashi, Ryouhei Takeuchi, Tomoyuki SaitoAbstract:Purpose The correction angle after high tibial osteotomy (HTO) depends on an accurate preoperative planning and an accurate intraoperative technique. We hypothesized that the use of a navigation system in opening wedge HTO would improve the intraoperative target angles in the coronal and sagittal planes.