Biomedical subjects

Mirza Biscević

Publications and source records attributed to Mirza Biscević.

5 recordsLinked to original sources

PubMed2005

Structural differences between hip endoprostheses, and implications on a hip kinetics.

We compared kinetic characteristic of unipolar, bipolar and total hip endoprostheses, implanted after dislocated femoral neck fracture. Ninety patients were divided into three groups (30 patients in each group); a group with unipolar partial hip endoprosthesis (UPEP), a group with bipolar partial hip endoprosthesis (BPEP) and a group with total hip endoprosthesis (TEP). The patients from different groups were paired by parameters which could influence the long term functional result: follow up period, comorbidities, functional capabilities before injury, etc. After the average follow up 3.8 +/- 1.9 years, a measuring of range of hip motions (ROM) was conducted. The largest mean amplitudes in flexion (104 degrees), extension (13 degrees), abduction (35 degrees) and external rotation (38 degrees) was achieved BPEP, the largest adduction (14 degrees) was achieved UPEP, and internal rotation (34 degrees) TEP. Differences in ROMs are partially related to the clinical parameters such as: level of the hip pain, gait pattern, age and rehabilitation period (P < 0.05). Measuring of ROMs is the most reliable part of the clinical exam and it does not depend on subjectivity of patient, as opposed to other clinical parameters (level of pain, walking distance, aids usage, etc). The results obtained are favorable for the bipolar hip endoprosthesis, and they can be related to the biomechanical differences between the three types of hip endoprostheses. Kinetic advantages of the BPEP as compared to the UPEP, can be explained by the BPEP's structure: two-level mobility and a thinner neck which delays impingement in the late motion phase. In comparison to the TEP, clinical advantages of the BPEP can be attributed to less extensive surgery and scarring.

Aged↗

PubMed2005

Gender differences in knee kinematics and its possible consequences.

AIM: To analyze anatomic and kinematic characteristics of male and female knees in the sagittal plane. METHODS: Ten healthy male and 10 healthy female participants performed extension of their right lower leg in non-weight bearing and weight bearing conditions. The centers of knee joint motion were obtained by videographic motion analysis, and radii of condylar curves were calculated from digitalized X-ray scan. The Knee Roll software was made for this purpose. RESULTS: The extension of the knee in non-weight loaded and weight loaded conditions is a combination of rolling and sliding joint surface motion with 6:5 ratio, in both genders. During the last 20 degrees of the extension of weight loaded male knee, rolling/sliding ratio changed to 8:1 (P<0.05). Average radii of condylar curves were between 4.5 and 1.7 cm medially, and between 3.2 and 1.8 cm laterally, for 0 degrees and 90 degrees flexion contact point, respectively. Gender differences in the radii of condylar curves, after the adjusting to body height were insignificant. CONCLUSION: A higher proportion of joint surface sliding with consecutive anterior tibial displacement in women indicates more strain during knee extension, potentially making the female anterior cruciate ligament tend and susceptible to injury. The gender differences in the knee kinematics are probably the consequence of different soft tissue structure or its activity, because no difference in the sagittal shape of femoral condyles was noted.

Adult↗

PubMed2005

[Possibilities of unipolar hip hemiarthroplasty after femoral neck fracture].

Due to osteoporosis and incoordination, elderly people are prone to hip fractures. Hip endoprosthesis is the most rational treatment of such injuries at persons older that 65 years of age. Aim of our work was to analyze long term clinical result at the elderly patients with implanted unipolar partial hip endoprothesis after femoral neck fracture. Inclusion criteria were implantation of unipolar partial hip endoprothesis as the first operative procedure and absence of changes visible an X-ray. Our follow up was at least 18 months and all patients were treated between January 1996 and June 2001 at the Clinic for Orthopedics and Traumatology in Sarajevo according to department protocol. We used Harris hip score (HHS) for clinical evaluation. From basic group of 131 patients, in retroprospective prospective research with average follow up period of 40 months, 32 patients were clinically examined, others passed away or were not reachable. Life expectancy in basic group was 3.5 years and average HHS in examined group was 72,06 points. Our study showed that unipolar partial hip endoprothesis implanted after femoral neck fracture achieves long term fair clinical result. Main factor on a patient's recovery is not type of implanted hip endoprothesis, but general health condition before injury, motivation and early postoperative mobilization.

Aged↗

PubMed2005

Variations of femoral condyle shape.

The aim of this study is to mathematically approximate the shape of the femoral articulating line and compare radiuses of condylar curves within and between males and females. Ten male and ten female participants were included in the study. Radiuses of medial and lateral condylar curves were calculated from the side view knee X-ray by original mathematical equation. Average radiuses of condylar curves were between 4.5 and 1.7 cm medially, and between 3.2 and 1.8 cm laterally, for 0 degrees and 90 degrees flexion contact point respectively. Males had longer curve radiuses of both condyles (p < 0.05). Differences turned out to be statistically insignificant after adjusting to body height. Even small changes in the joint geometry during lifetime could make a joint susceptible to osteoarthritis or injuries. Approximation of the radiuses of femoral condyle curves is a useful method in anthropometric, radiological and virtual calculations of the knee geometry, and other ellipsoidal structures in human body, like wrist, scull segments, dental arches, etc.

Adult↗

PubMed2004

[Tumor of the sacroiliac region].

We present case of a 13 y. girl who has admitted with hard symptoms on our Department after back injury in school. Clinical presentation and complete radiological tests were pointed to inflammatory process of sacroiliac region. Hard general condition has forced us to indicate operative procedure. Diagnosis was established after surgical intervention-incapsulated tumor-lipoma, which has been extirpated without visible inflammatory signs. After this intervention local and general condition were improved-clinically and laboratory. Girl was sent to home as a completely cured patient.

Adolescent↗