C. Kurtenbach | Sanford USD Medical center (original) (raw)

Papers by C. Kurtenbach

Research paper thumbnail of Anterior Cruciate Ligament Injuries in Professional Hockey Players

The American journal of sports medicine, Jan 14, 2015

Performance outcomes and return-to-play data have been reported after anterior cruciate ligament ... more Performance outcomes and return-to-play data have been reported after anterior cruciate ligament (ACL) injuries in professional football and basketball, but they have rarely been reported in professional hockey. The hypothesis was that performance after ACL reconstruction would be comparable to prior levels of play in a series of National Hockey League (NHL) players. Case series; Level of evidence, 4. The NHL Injury Surveillance System (ISS) was utilized to identify all players with an ACL injury between 2006 and 2010. Medical staff members for all NHL teams were surveyed regarding these injuries. The medical staff completed a questionnaire for each injury, and statistics were analyzed using multiple analyses of variance to compare outcomes, performance, and the complication rate. A control group was identified and matched based on performance, career length before injury, age, height, and weight. There were 47 players identified by the NHL ISS. There were 3 goalies, 8 defensemen, a...

Research paper thumbnail of Patient-Specific Instrumentation and Return to Activities After Unicondylar Knee Arthroplasty

Clinics in Sports Medicine, 2014

Research paper thumbnail of The Effect of a Proximal Tibial Medial Opening Wedge Osteotomy on Posterolateral Knee Instability

The American Journal of Sports Medicine, 2008

Background Increased stability of posterolateral corner knee injuries has been observed clinicall... more Background Increased stability of posterolateral corner knee injuries has been observed clinically after proximal tibial medial opening wedge osteotomies. Hypothesis Static varus and external rotatory stability will be significantly improved in a knee with a grade 3 posterolateral knee injury after a proximal tibial medial opening wedge osteotomy. Study Design Controlled laboratory study. Methods Biomechanical testing of 10 nonpaired, cadaveric knees was performed in the intact state, after transection of the posterolateral corner (fibular collateral ligament, popliteus tendon, and popliteofibular ligament), and after a 10-mm proximal tibial medial opening wedge osteotomy. Loading conditions consisted of 12 N.m varus moments and 6 N.m external rotation torques. Six degrees of freedom motion analysis was used to assess motion changes, and a buckle transducer was used to measure the force on the superficial medial collateral ligament during applied loads. Results After transection of ...

Research paper thumbnail of Patient-Specific Instrumentation and Return to Activities After Unicondylar Knee Arthroplasty

In the past decade, there has been a major increase in the use of unicompartmental knee arthropla... more In the past decade, there has been a major increase in the use of unicompartmental knee arthroplasty (UKA) as surgical techniques have been refined and patient selection has improved. UKAs now account for 8% to 10% of knee arthoplasty procedures. Recent studies have suggested excellent medium- and long-term results of UKA. Overall, results have shown 85% to 90% survivorship at 10 years, with 90% of patients reporting good to excellent subjective and objective outcomes. Recent studies suggest that unicompartmental arthroplasty allows a high percentage of patients to return to presurgical sport and activity participation.

Research paper thumbnail of Anterior Cruciate Ligament Injuries in Professional Hockey Players

Background: Performance outcomes and return-to-play data have been reported after anterior crucia... more Background: Performance outcomes and return-to-play data have been reported after anterior cruciate ligament (ACL) injuries in professional football and basketball, but they have rarely been reported in professional hockey.

Research paper thumbnail of The Effect of a Proximal Tibial Medial Opening Wedge Osteotomy on Posterolateral Knee Instability: A Biomechanical Study

The American Journal of Sports Medicine, 2008

Increased stability of posterolateral corner knee injuries has been observed clinically after pro... more Increased stability of posterolateral corner knee injuries has been observed clinically after proximal tibial medial opening wedge osteotomies. Static varus and external rotatory stability will be significantly improved in a knee with a grade 3 posterolateral knee injury after a proximal tibial medial opening wedge osteotomy. Controlled laboratory study. Biomechanical testing of 10 nonpaired, cadaveric knees was performed in the intact state, after transection of the posterolateral corner (fibular collateral ligament, popliteus tendon, and popliteofibular ligament), and after a 10-mm proximal tibial medial opening wedge osteotomy. Loading conditions consisted of 12 N.m varus moments and 6 N.m external rotation torques. Six degrees of freedom motion analysis was used to assess motion changes, and a buckle transducer was used to measure the force on the superficial medial collateral ligament during applied loads. After transection of the posterolateral corner structures, a significant increase in varus rotation was found to applied varus moments with a mean increased opening of 5.9 degrees to varus stress at 30 degrees and 5.8 degrees at 90 degrees of knee flexion. After proximal tibial medial opening wedge osteotomy, varus rotation was increased by a mean of 1.6 degrees at 30 degrees and 1.7 degrees at 90 degrees of knee flexion compared with the intact state. There was a significant decrease in varus rotation to a varus moment after osteotomy compared with the posterolateral sectioned state at both 30 degrees and 90 degrees . External rotation of the knee increased by 4.7 degrees at 30 degrees and 4.8 degrees at 90 degrees after posterolateral structure sectioning compared with the intact state. After the osteotomy, there was a significant decrease in external rotation compared with the posterolateral sectioned state, and there was no significant difference in external rotation compared with the intact state. There was a significant increase in force on the superficial medial collateral ligament after the osteotomy compared with both the intact and posterolateral corner cut state for both an applied varus moment and external rotation torque at both 30 degrees and 90 degrees . Our results demonstrate that a proximal tibial medial opening wedge osteotomy decreased varus and external rotation laxity for posterolateral corner-deficient knees. Concurrently, an increase in force was observed on the superficial medial collateral ligament compared with the native state. The improved stability observed in some patients with grade 3 posterolateral knee injuries after a proximal tibial medial opening wedge osteotomy appears to at least in part be due to tightening of the superficial medial collateral ligament. The long-term consequences of the increased force on the superficial medial collateral ligament on the medial compartment, and whether it elongates with time, merit further investigation.

Research paper thumbnail of Anterior Cruciate Ligament Injuries in Professional Hockey Players

The American journal of sports medicine, Jan 14, 2015

Performance outcomes and return-to-play data have been reported after anterior cruciate ligament ... more Performance outcomes and return-to-play data have been reported after anterior cruciate ligament (ACL) injuries in professional football and basketball, but they have rarely been reported in professional hockey. The hypothesis was that performance after ACL reconstruction would be comparable to prior levels of play in a series of National Hockey League (NHL) players. Case series; Level of evidence, 4. The NHL Injury Surveillance System (ISS) was utilized to identify all players with an ACL injury between 2006 and 2010. Medical staff members for all NHL teams were surveyed regarding these injuries. The medical staff completed a questionnaire for each injury, and statistics were analyzed using multiple analyses of variance to compare outcomes, performance, and the complication rate. A control group was identified and matched based on performance, career length before injury, age, height, and weight. There were 47 players identified by the NHL ISS. There were 3 goalies, 8 defensemen, a...

Research paper thumbnail of Patient-Specific Instrumentation and Return to Activities After Unicondylar Knee Arthroplasty

Clinics in Sports Medicine, 2014

Research paper thumbnail of The Effect of a Proximal Tibial Medial Opening Wedge Osteotomy on Posterolateral Knee Instability

The American Journal of Sports Medicine, 2008

Background Increased stability of posterolateral corner knee injuries has been observed clinicall... more Background Increased stability of posterolateral corner knee injuries has been observed clinically after proximal tibial medial opening wedge osteotomies. Hypothesis Static varus and external rotatory stability will be significantly improved in a knee with a grade 3 posterolateral knee injury after a proximal tibial medial opening wedge osteotomy. Study Design Controlled laboratory study. Methods Biomechanical testing of 10 nonpaired, cadaveric knees was performed in the intact state, after transection of the posterolateral corner (fibular collateral ligament, popliteus tendon, and popliteofibular ligament), and after a 10-mm proximal tibial medial opening wedge osteotomy. Loading conditions consisted of 12 N.m varus moments and 6 N.m external rotation torques. Six degrees of freedom motion analysis was used to assess motion changes, and a buckle transducer was used to measure the force on the superficial medial collateral ligament during applied loads. Results After transection of ...

Research paper thumbnail of Patient-Specific Instrumentation and Return to Activities After Unicondylar Knee Arthroplasty

In the past decade, there has been a major increase in the use of unicompartmental knee arthropla... more In the past decade, there has been a major increase in the use of unicompartmental knee arthroplasty (UKA) as surgical techniques have been refined and patient selection has improved. UKAs now account for 8% to 10% of knee arthoplasty procedures. Recent studies have suggested excellent medium- and long-term results of UKA. Overall, results have shown 85% to 90% survivorship at 10 years, with 90% of patients reporting good to excellent subjective and objective outcomes. Recent studies suggest that unicompartmental arthroplasty allows a high percentage of patients to return to presurgical sport and activity participation.

Research paper thumbnail of Anterior Cruciate Ligament Injuries in Professional Hockey Players

Background: Performance outcomes and return-to-play data have been reported after anterior crucia... more Background: Performance outcomes and return-to-play data have been reported after anterior cruciate ligament (ACL) injuries in professional football and basketball, but they have rarely been reported in professional hockey.

Research paper thumbnail of The Effect of a Proximal Tibial Medial Opening Wedge Osteotomy on Posterolateral Knee Instability: A Biomechanical Study

The American Journal of Sports Medicine, 2008

Increased stability of posterolateral corner knee injuries has been observed clinically after pro... more Increased stability of posterolateral corner knee injuries has been observed clinically after proximal tibial medial opening wedge osteotomies. Static varus and external rotatory stability will be significantly improved in a knee with a grade 3 posterolateral knee injury after a proximal tibial medial opening wedge osteotomy. Controlled laboratory study. Biomechanical testing of 10 nonpaired, cadaveric knees was performed in the intact state, after transection of the posterolateral corner (fibular collateral ligament, popliteus tendon, and popliteofibular ligament), and after a 10-mm proximal tibial medial opening wedge osteotomy. Loading conditions consisted of 12 N.m varus moments and 6 N.m external rotation torques. Six degrees of freedom motion analysis was used to assess motion changes, and a buckle transducer was used to measure the force on the superficial medial collateral ligament during applied loads. After transection of the posterolateral corner structures, a significant increase in varus rotation was found to applied varus moments with a mean increased opening of 5.9 degrees to varus stress at 30 degrees and 5.8 degrees at 90 degrees of knee flexion. After proximal tibial medial opening wedge osteotomy, varus rotation was increased by a mean of 1.6 degrees at 30 degrees and 1.7 degrees at 90 degrees of knee flexion compared with the intact state. There was a significant decrease in varus rotation to a varus moment after osteotomy compared with the posterolateral sectioned state at both 30 degrees and 90 degrees . External rotation of the knee increased by 4.7 degrees at 30 degrees and 4.8 degrees at 90 degrees after posterolateral structure sectioning compared with the intact state. After the osteotomy, there was a significant decrease in external rotation compared with the posterolateral sectioned state, and there was no significant difference in external rotation compared with the intact state. There was a significant increase in force on the superficial medial collateral ligament after the osteotomy compared with both the intact and posterolateral corner cut state for both an applied varus moment and external rotation torque at both 30 degrees and 90 degrees . Our results demonstrate that a proximal tibial medial opening wedge osteotomy decreased varus and external rotation laxity for posterolateral corner-deficient knees. Concurrently, an increase in force was observed on the superficial medial collateral ligament compared with the native state. The improved stability observed in some patients with grade 3 posterolateral knee injuries after a proximal tibial medial opening wedge osteotomy appears to at least in part be due to tightening of the superficial medial collateral ligament. The long-term consequences of the increased force on the superficial medial collateral ligament on the medial compartment, and whether it elongates with time, merit further investigation.