Masahiro Kosaka

Learn More
PURPOSE This study investigated the effect of the FIFA 11+ warm-up program on whole body muscle activity using positron emission tomography. METHODS Ten healthy male volunteers were divided into a control group and a group that performed injury prevention exercises (The 11+). The subjects of the control group were placed in a sitting position for 20 min(More)
This study evaluated knee laxity in anterior tibial translation and rotation following removal of anterior cruciate ligament (ACL) remnants using a computer navigation system. This prospective study included 50 knees undergoing primary ACL reconstruction using a navigation system. ACL remnants were classified into four morphologic types: Type 1, bridging(More)
PURPOSE To evaluate tendon-to-bone healing after anterior cruciate ligament (ACL) reconstruction in the fibrous interzone (FIZ) of the femoral and tibial tunnels using magnetic resonance imaging (MRI). METHODS Five men and 5 women (mean age, 29 years) underwent arthroscopic ACL reconstruction by a single surgeon, using the semitendinosus and gracilis(More)
The aim of this study was to compare ultrasonography stages of the tibial tuberosity development and physical features. This study examined 200 knees in 100 male football players aged 10–15 years. Tibial tuberosity development on ultrasonography was divided into 3 stages: Sonolucent stage (stage S), Individual stage (stage I), and Connective stage (stage(More)
BACKGROUND This study aimed to present a new technique for anatomical single bundle anterior cruciate ligament (ACL) reconstruction. We developed an original rounded rectangular dilator set to create rounded rectangular femoral tunnels. This technique can increase the femoral tunnel size without roof impingement, and has the potential to reduce the graft(More)
Purpose: This study investigated the effect of the FIFA 11+ warm-up program on whole body muscle activity using positron emission tomography. Methods: Ten healthy male volunteers were divided into a control group and a group that performed injury prevention exercises (The 11+). The subjects of the control group were placed in a sitting position for 20 min(More)
This paper proposes a pen tablet orientation method for easily pointing anywhere on the screen of one of several monitors in a multi-monitor setup. With this method, a user selects the desired monitor by orienting a pen tablet toward it and then pointing within it with a stylus. This allows the user to similarly access the center and corners of a wide(More)
BACKGROUND The purpose of this study was to investigate the efficacy of additional oblique magnetic resonance imaging (MRI) for the diagnosis of anterior cruciate ligament (ACL) tear and evaluation of ACL remnant tissue. METHODS We retrospectively reviewed the records of 54 knees. Three independent readers evaluated the MR images by the use of three(More)
PURPOSE To evaluate the therapeutic effect of adipose-derived regenerative cell (ADRC) administration on tendon-bone healing in a rabbit anterior cruciate ligament (ACL) reconstruction model. METHODS ACL reconstruction with semitendinosus tendon autograft was performed in the right knees of adult white rabbits. Eighty rabbits were divided into 2 groups:(More)
BACKGROUND The purpose of this study was to investigate the relationship between psychological competitive ability and the incidence of noncontact ACL injuries among high school female athletes. METHODS A three-year prospective cohort study was conducted using 300 15-year-old high school female athletes with no previous injuries or symptoms in their lower(More)