Biomedical subjects

C Johansson

Publications and source records attributed to C Johansson.

384 records · Page 22Linked to original sources

PubMedDate not supplied

Soccer injuries among elite female players.

Injuries occurring in two female elite soccer teams were recorded during 1 year. Of 41 players, 33 (80%) sustained 78 injuries. The incidence of injury during games was 24/1000 hours, while the incidence during training was 7/1000 hours. The majority (88%) of injuries were localized to the lower extremities, with equal occurrence in the left and right legs. Forty-nine percent of the injuries occurred in the knee or ankle. Most of the injuries were minor (49%), while 36% were moderate and 15% were major. Of the major injuries (N = 12), 10 were due to trauma and 7 (58%) were knee ligament or meniscal tears. Overuse injuries constituted 28% of all injuries and occurred mainly during preseason training and at the beginning and end of the competitive season. Traumatic injuries (72%) occurred mainly during games with a predominance at the beginning of the competitive season. Almost 80% of the traumatic injuries occurred during physical contact with an opponent. Extrinsic factors such as weather, playing surface, temperature, or the position of the player within the team did not influence the injury rate. We conclude that female elite soccer players sustain a high incidence of injury. Few injuries were major, but 17% of the players sustained a major knee injury during the year.

Adolescent↗

PubMedDate not supplied

Shoulder function in patients with unoperated anterior shoulder instability.

A functional analysis, including Rowe score and measurements of isokinetic peak torque and range of motion of the shoulder, and a subjective assessment were performed in 26 consecutive patients (23 males and 3 females) with unoperated anterior shoulder instability. Patients experienced the initial dislocation at an average age of 23 +/- 8 years and 58% occurred during sports activity. No patient had gone through any controlled rehabilitation program. In this study, an average of 7 years (range, 1 to 28) had passed since the initial dislocation. Fifty-nine percent of the patients complained of markedly reduced ability to perform in sports because of instability, impaired strength, decreased range of motion, and pain induced by activity. The majority (65%) of the patients reported instability only during physical activity. The average Rowe score was 68 +/- 14 on a scale of 100. In comparison with the healthy side, the injured shoulder had a significantly lower isokinetic peak torque during abduction and internal rotation, as well as a reduced range of motion in extension, abduction, and external rotation, but not in flexion. The severity of impairment (Rowe score, deficit in range of motion, and peak torque) was not related to the number of dislocations sustained or to the duration of instability.

Adult↗

PubMedDate not supplied

Long-term functional results of the modified Bristow procedure for recurrent dislocations of the shoulder.

Subjective shoulder function, range of motion, isokinetic muscular performance, and radiographs were analyzed in 44 patients at an average follow-up time of 6 years after a Bristow-Latarjet procedure for recurrent dislocations of the shoulder. The injured shoulder was compared with the healthy side in each patient. Ninety-five percent of the patients considered mobility, strength, and stability of the operated shoulder as good or excellent. Totally, 32 of 44 patients (72%) had no pain or discomfort at all, while the remaining 12 (28%) complained of moderate exertional pain. Range of motion in extension, flexion, abduction, and internal and external rotation did not differ significantly between the injured and healthy sides. Nor did isokinetic peak torque at 30 and 90 deg/sec differ in extension, flexion, or internal and external rotation. The rate of healing of the implant did not seem to influence the functional outcome of surgery. Two patients suffered from recurrent dislocations. The Bristow-Latarjet procedure provided a good or excellent long-term functional result in patients with recurrent shoulder dislocations.

Adolescent↗

PubMedDate not supplied

Tenotomy of the adductor longus tendon in the treatment of chronic groin pain in athletes.

Eighteen tenotomies of the adductor longus tendon were performed in 16 consecutive male athletes (aged 20 to 42) as treatment for chronic groin pain. The criteria for surgery was a history of long-standing (range, 2.5 to 48 months) and distinct pain at the origin of the adductor longus muscle, refractory to conservative treatment. At followup 35 months (range, 4 to 84) after surgery, all patients were improved or free of symptoms. All but 1 of the athletes returned to the same sport within a mean of 6.6 weeks, and 12 of 16 returned to competitive sports within a mean of 14 weeks after surgery. A majority of the patients (10 of 16) returned to full athletic activity, whereas 5 of 16 performed at a reduced level. One patient discontinued his sports activity due to other causes. In conclusion, when conservative treatment fails, tenotomy of the adductor longus tendon gives good long-term functional results in the treatment of chronic groin pain that is localized at the origin of the adductor longus muscle. A decreased muscle strength was observed in this study and did not seem to influence participation in sports.

Adult↗

PubMedDate not supplied

Augmentation of the maxillary sinus floor with particulated mandible: a histologic and histomorphometric study.

This study presents the results of 10 consecutive patients treated with unilateral bone augmentation of the maxillary sinus floor using particulated mandible harvested from the symphysis. Endosseous titanium implants (Brånemark) were placed 6 months after the transplant procedure. Thirty self-tapping implants were placed with a mean follow-up period of 26 months (range 12 to 46 months). Bone biopsy specimens were obtained from the donor site and the residual alveolar process at the time of grafting. A second biopsy specimen was obtained from the grafted site after 6 months of healing (at time of implant placement), and a third biopsy specimen was obtained after 12 months of healing (at time of abutment placement). Histomorphometry was performed on microradiographs using a computerized image analysis system. The bone volume fraction at the donor site before particulation was 58% +/- 19%, and the volume fraction at the residual alveolar process was 45% +/- 15%. The mean volume fraction of bone in the grafted area increased from 40% +/- 12% after 6 months of healing to 48% +/- 10% after 12 months. Histology of the retrieved bone biopsy specimens revealed normal healing and bone maturation in all samples.

Adult↗

PubMedDate not supplied

A 1-year follow-up of implants of differing surface roughness placed in rabbit bone.

Screw-shaped implants were prepared with three different surface topographies: One was left as machined, ie, a turned surface, and two were blasted surfaces with differing degrees of surface roughness. The surface topography was measured with a confocal laser scanning profilometer and the surface roughness was characterized using height and spatial descriptive parameters. The turned surface had an average surface roughness of 0.96 micron and an average peak spacing of 8.6 microns. The two blasted surfaces had surface roughness values of 1.16 microns and 1.94 microns, respectively; the corresponding values for the peak spacing parameter were 10.00 microns and 13.22 microns, respectively. After 1 year in rabbit bone, the bone response to the turned implants was compared with the response to the two blasted implant surfaces. Firmer bone fixation was found for the two blasted surfaces, with statistically significant increases in removal torque and percentage of bone-to-metal contact. Furthermore, about 2 mm from the implant surface, the titanium release was similar for the turned and the 25-micron aluminum oxide-blasted implants.

Aluminum Oxide↗