A Method for Prediction of Femoral Component of Hip Prosthesis Durability due to Aseptic Loosening by Using Coffin/Manson Fatigue Model.

The purpose of this work is to develop a new model estimate of the fatigue life of a hip prosthesis due to aseptic loosening as a multifactorial phenomenon. The formula developed here is a three-parameter model based on Basquin's law for fatigue, eccentric compression formula for the compressive stress and torsion in the prosthesis due to the horizontal components of the contact force. With our model, we can accurately predict the durability of a hip prosthesis due to the following four parameters: body weight, femoral offset, duration, and intensity of daily physical activities of a patient.

The Importance of Patellar Resurfacing in Total Knee Arthroplasty for Symptomatic Valgus Degenerative Deformity.

PURPOSE OF THE STUDY Patellar surface replacement during total knee arthroplasty is still a matter of discussion among orthopedic surgeons. The purpose of this study was to examine possible benefits of patellar surface replacement in selected patients with symptomatic degenerative valgus deformity. We have not found any studies in the literature that compare the results of patella management solely for valgus or varus knee deformity nor those that compare both.

Musculoskeletal Pain and Vitamin D Deficiency in Children: A Pilot Follow-up Study of Vitamin D Therapy in Musculoskeletal/Orthopedic Conditions.

Purpose Of The Study: The prevalence of vitamin D deficiency in pediatric populations is high. In the present study we analyzed associations between vitamin D therapy and pain, mobility, fatigue, and daily functioning in children with musculoskeletal/orthopedic conditions suffering from chronic and recurrent pain, but also diagnosed with vitamin D deficiency.

Material And Methods: Children with different musculoskeletal/orthopedic conditions and vitamin D deficiency were prescribed to receive vitamin D over 6 months.

Microsurgical anatomy of the extra-articular segment of middle genicular artery.

Purpose: Knowledge of the incompletely studied microsurgical anatomy of the extracapsular part of the middle genicular artery (MGA) could imply an educational value and clinical significance because of the possible risk of injury during knee surgery.

Methods: Thirty formol-fixed cadaveric lower limbs in full extension were dissected and used for the measurements of MGA parameters. A second group of measurements was performed on distal ends of 30 adult femurs.

Computer and experimental analyses of the stress state in the cement hip joint endoprosthesis body.

Background/aim: One of the possible complications after implantation of a cement hip-joint endoprosthesis is frac- ture in the endoprosthesis body. Fractures arise from overload or material fatigue of which an implant is made. The purpose of this research was to define the intensity of maximum stress and the positions of a critical cross-section in the endoprosthesis body.

Semitendinosus tendon regeneration after anterior cruciate ligament reconstruction: can we use it twice?

Purpose: It has been demonstrated that the semitendinosus tendon can regenerate after being harvested in its whole length and thickness for anterior cruciate ligament (ACL) reconstruction. Ultrasound studies and guided biopsies of the regenerated tendon have shown compatibility and resembling features of the normal tendon. The question is if this neo-tendon is biologically and functionally adequate for re-use?

Methods: Two randomised groups of 150 volunteers were followed up for two years after harvesting the semitendinosus only (25) or the semitendinosus and gracilis tendons (25) in ACL reconstruction.

[The role of the posterior tibial slope on rupture of the anterior cruciate ligament].

Background/aim: Posterior tibial slope is one of the most citated factors wich cause rupture of the anterior cruciate ligament (ACL). The aim of this study was to determine the association of a greather posterior tibial slope on the lateral condyle, that is a lesser posterior tibial slope on the medial condyle, with ACL rupture.

Methods: The patients were divided into two groups.

The third branch of the main trunk of the left coronary artery in Cercopithecus aethiops sabaeus. Is the nonhuman primate model appropriate?

The aim of this study was to investigate the morphometry of branching patterns of the main trunk of the left coronary artery (MT of LCA) in nonhuman primates, and comment on the current nomenclature. The biometric study was performed using stereomicroscopic dissection of hearts of healthy and fertile nonhuman primates (Cercopithecus aethiops sabaeus) of both sexes. Our results reveal that the MT of LCA terminates in a bifurcation into the anterior interventricular branch (AIB) and the circumflex branch (CB) (74.

Predicting ACL rupture in the population actively engaged in sports activities based on anatomical risk factors.

The purposes of this article were identification (ie, verification and gradation) of anatomical risk factors that lead to anterior cruciate ligament (ACL) injury and determination of the probability of ACL injury among the population actively engaged in sports activities. We evaluated 66 patients divided into 2 groups: 33 patients in the examined group diagnosed with ACL lesion, and 33 patients in the control group diagnosed with patellofemoral pain. Patients were matched by age, sex, type of lesion, and whether the lesion was left or right sided.

[The position of anterior cuciate ligament in frontal and sagittal plane].

Introduction: Position of the anterior cruciate ligament (ACL) represents one of the anatomical factors which can lead to the rupture of the ligament.

Aim: The aim of this study was to overview and compare gender and age differences of the position of the ACL and its relation with the medial aspect of the lateral femoral condyle.

Method: The measurements were performed on the fifty cadaver knees (32 male and 18 female) aged between 15 - 53 years with intact ACL.

[Topographic localisation of insertion of the anterior cruciate ligament].

Introduction: Determining the center of tibial insertion of the anterior cruciate ligament is important during reconstruction ligament.

Aim: Determining the center of insertion of the anterior cruciate ligament on the anterior intercondylar area relate to anterior and medial edge of the upper end of tibia.

Material And Methods: The messurement has been done on 102 tibia.

[Postoperative use of nonsteroidal anti-inflammatory agents in orthopedic surgery].

Nonsteroidal antiinflamatory drugs (NSAIDs) lead to satisfactory acute and chronic pain relief. Besides that, they exert potent antiinflamatory effect. Their analgesic potency is dose related and limited.

Unusual position of bone tunnels in failed ACL reconstruction.

Introduction: Surgery of ACL deficient knees is very frequent nowadays due to advanced surgical techniques, sophisticated implants and large number of surgeons. Therefore, the number of revisions for various reasons is growing up. There are several well known reasons for failed surgery This paper reported a case of revision surgery in a patient with previously done and failed reconstruction of ACL.

[Current trends in surgical treatment of radial nerve injuries associated with injuries of the humerus].

Radial nerve is the most common injured peripheral nerve after bone and wrist injuries in human body. Radial nerve can be injured by force causing fracture of the humeral shaft, due to compound fracture of the bone or by direct injury with small fragments of the bone. This happen in of cases and in remaining caseswas caused by manipulation during the treatment of the fracture of the humeral shaft.

[Intramedullary fixation and proximal femoral fractures: diversity in use through case reports].

Proximal femoral fractures, including intertrochanetric and subtrochanteric with diaphiseal propagation represent a significant challenge in orthopedic surgery, especially in older population. Retrospective analysis of patients, after the application of "Bi Nail (Bioimpianti Inc.) intramedullary nail for fractures and pathological conditions of proximal femur, was done at the Department of Adult Orthopedics, Institute of Orthopedic surgery Banjica, during the three year period.

[Fixation of the tuberculum in multifragment fractures of the proximal humerus treated with hemiarthroplasty].

Hemiarthroplasty is an effective treatment for multifragmentary fractures of the proximal humerus. Purpose of this study was to compare 2 different methods of tuberosity dislocations,which is one of the primary reasons for successful posttraumatic arthroplasty. Between 2006 and 2008, 29 patients with multifragmentary fractures of the proximal humerus underwent hemiarthroplasty of the shoulder.

[Damage control surgery in abdominal trauma].

The damage control laparotomy is an advancement in the management of massively injured trauma patients. Massive liver injuries, pelvic trauma and some retroperitoneal injuries are some of the indications for this approach. The damage control laparotomy is the phased approach to severe abdominal injury that might best be described with the acronym STIR (Staged Trauma Injury Repair).

[Challenges and advances in the care of injuries in the Republic of Serbia].

There are many problems that trauma care system in Serbia is facing today. Few of them are: 1) Lack of categorization of trauma centers; 2) Diversity in managing of trauma patients among institutions; 3) There is no trauma management training, 4) Inappropriate cooperation between pre hospital trauma care and hospital trauma care; 5) There is no standard in managing of trauma patients as well as procedures. To improve trauma care quality throughout the country we must learn from the experiences of other countries.

Prospective evaluation of the prevalence of Helicobacter pylori in abdominal surgery patients.

Background/aims: Helicobacter pylori infection is accepted to be associated with two mutually exclusive diseases duodenal ulcer and gastric cancer. The aim of this study was to explore the relationship and prevalence of Helicobacter pylori infection in different surgical diseases.

Methodology: With use of simple serologic assays for detecting IgA and IgG antibodies to HP antigen, we studied the association of infection with HP and 15 surgical diseases.

Treatment of locked chronic posterior dislocation of the shoulder by reconstruction of the defect in the humeral head with an allograft.

The treatment of a chronic posterior dislocation of the shoulder is often determined by the size of the associated impression fracture of the humeral head. Our hypothesis was that patients with a chronic unreduced posterior dislocation of the shoulder and a defect in the humeral head involving between 25% to 50% of the articular surface, would do better if reconstructed with an allograft from the femoral head rather than treated by a non-anatomical reconstruction. We reviewed ten men and three women with a mean age of 42 years (36 to 51) at a mean follow-up of 54 months (41 to 64) who had this procedure.

[Oversights in the care of severe injuries].

Question of missed injuries is more often a question of human errors: task execution errors, procedural errors, communication errors, decision errors and noncompliance. Missed injuries are those which are not idetified in the first three days of hospitalisaation. This theme is not popular among physicians.

Laser-induced damages of different types of human gallbladder stones.

Background/aims: Today, treatment of human calculi, and particularly those of gallbladder, is, to a large extent, less invasive procedure due to numerous non-invasive methods that have been developed.

Methodology: CO2 laser of pulse (output 5W)(W-watt, SI unit system) and continual mode (output 15W) and diode laser (808 nm-nanometer, SI) were used for tests of fragmentation of gallbladder calculi in vitro.

Results: A total of 15 human gallbladder calculi of known size were examined, which had been collected during surgical interventions.

[Morphometric parameters of the intercondylar notch, gender and age differences].

Introduction: Narrow intercondylar notch of femur can lead to lean anterior cruciate ligament on femur's condyle, constraint and rupture.

Purpose: Purpose of this study is description and comparasion gender and oldage differencies of morphometric factors of intercondylar notch important for rupture LCA.

Method: The measurements were taken on 50 cadaverous knees (32 male and 18 female) with intact anterior cruciate ligament, aged from 15 to 53 years.

Correlation between the morphometric parameters of the anterior cruciate ligament and the intercondylar width: gender and age differences.

The study was conducted on 50 cadavers (32 male and 18 female, aged 15-53 years; mean 34; SD 11) with intact anterior cruciate ligament (ACL), without diagnosed gonarthrosis of the knee joint. The following anatomical parameters of the ACL were measured: the length of anteromedial and posterolateral bundle, the mean length and the width of the ligament, the length and width of tibial insertion, the length and width of femoral insertion. The intercondylar width was measured at the level of popliteal groove.

The position of anterior cruciate ligament in frontal and sagittal plane and its relation to the inner side of the lateral femoral condyle.

The position of the anterior cruciate ligament (ACL) is one of the anatomical factors that lead to its injury. We evaluated 66 patients divided in two groups: 33 patients in the examined group with a diagnosed ACL lesion, and 33 patients in the control group with diagnosed patellofemoral pain. The patients were matched by age, sex, type of lesion (whether it was profession related) and whether the lesion was left or right sided.