Collagen Mutant Mouse Models Provide an Important Tool to Study Osteoarthritis

Mutations in the human type II (COL2A1) collagen gene appear to be the basis for many skeletal disorders such as spondyloepiphyseal dysplasia, achondrogenesis, Kniest, and Stickler syndrome.

Several of these conditions include early-onset osteoarthritis in addition to the chondrodysplasia phenotype. Other collagen genes are also involved etiologically in the chondrodysplasias, e.g., an autosomal dominant form of Stickler syndrome, characterized by mild spondyloepiphyseal dysplasia (SED) and early-onset osteoarthritis, results from a mutation involving the COL11A2 gene that encodes the α2 (XI) chain of the quantitatively minor fibrillar type XI collagen.

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Arthroscopic-Assisted Anterior Cruciate Ligament Reconstruction Using Hamstring Autograft Augmented with a Dehydrated Human Amnion/Chorion Membrane Allograft: A Retrospective Case Report

Anterior Cruciate Ligament (ACL) rupture is a very common sports related knee injury. Surgical reconstruction using either autograft or allograft is the gold-standard treatment for a ruptured ACL.

Presented is a case of a 23-year old female skier with a Magnetic Resonance Imaging (MRI) confirmed primary ACL tear that underwent an arthroscopic-assisted ACL reconstruction using a quadruple-stranded hamstring autograft augmented with a Dehydrated Human Amnion/Chorion Membrane (dHACM) allograft patch.

Post-operative follow-up MRI scans at three and six months show early vascularization and maturation of the hamstring graft. Additionally, the patient’s rehabilitation progressed at an accelerated timeline with regards to strength and proprioception with subsequent clearance to return to play at 8 months post-op.

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V-Shaped Corrective Ulnar Osteotomy in Neglected Monteggia Fracture Dislocation in Children

Neglected Monteggia fracture dislocation in children constitutes significant disability in respect to pain, stiffness, deformity, neurological compromise and restriction of activities of daily living.

Many treatment strategies have been described to manage neglected Monteggia fracture dislocation and one of these strategies is the ulnar osteotomy for restoration of the ulnar length and reduction of the radial head with annular ligament reconstruction for restoration of the elbow biomechanics for this difficult problem.

Evaluation of the results of a new V-shaped corrective ulnar osteotomy without bone grafting with annular ligament reconstruction in management of neglected Monteggia fracture dislocation in children.

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Epidemiology of Forearm Fractures in the Population of Children and Adolescents: Current Data from the Typical Polish City

Injuries of the musculoskeletal system in children and adolescents are an important clinical and economical problem. Forearm fractures involving one or two bones comprise more than one third of all fractures in this population group.

In our work, we have decided to evaluate the epidemiological incidence of the forearm fractures with the special regard to the precise anatomical location in the representative population of children and youth from a typical Polish town.

Methods: The study included the entire population aged 0-18 years old from the city of Olsztyn in the years 2009- 2012. The analysis of the incidence of fractures was based on the complete medical records. The test used the division of forearm fractures into 7 groups (depending on the anatomical location).

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Cementless Long Stem Total Hip Replacement for Revision of Failed Hemiarthroplasty

The total hip replacement after failure of hemiarthroplasty (unipolar or bipolar) has been associated with very high rates complications (intra- and postoperative).

Forty patients 24 males and 16 females with a mean age of 58 years (range: 48-68) had total hip arthroplasty (THA) revision of aseptic loosening of hip hemiarthroplasty. The mean duration of the follow-up was 42 months (range: 30-72), and the cases lost in follow up were excluded from the study.

Failure was defined as revision arthroplasty or radiographic evidence of stem loosening, indicated by an Engh fixation score ≤ 10. Vertical femoral migration of >5 mm was defined as subsidence.

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Epidemiology of Forearm Fractures in the Population of Children and Adolescents: Current Data from the Typical Polish City

Injuries of the musculoskeletal system in children and adolescents are an important clinical and economical problem. Forearm fractures involving one or two bones comprise more than one third of all fractures in this population group.

In our work, we have decided to evaluate the epidemiological incidence of the forearm fractures with the special regard to the precise anatomical location in the representative population of children and youth from a typical Polish town.

The study included the entire population aged 0-18 years old from the city of Olsztyn in the years 2009- 2012. The analysis of the incidence of fractures was based on the complete medical records. The test used the division of forearm fractures into 7 groups (depending on the anatomical location).

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A Novel Antero-Medial Cortical Window Technique for Removal of Well-Fixed Fully Porous Stem in Revision Total Hip Arthroplasty

Fully porous-coated cementless stem has the advantage of good initial metaphyseal to diaphysial fixation. However, it is very difficult to remove the stem when complications develop.

Extraction of a stem may cause huge damage to the femur. A long stem may be required to ensure stability for subsequent femoral reconstruction. Here we present a case employing a novel technique of minimizing invasion to the femur when a wellfixed, extensively porous-coated cementless stem needs to be removed.

A 58-year-old woman had a revision total hip arthroplasty for trunnionosis after the left total hip arthroplasty. In the operation we made two cortical windows to the femur. It enabled us to reach all circumferences of the stem. By this technique the stem could be easily removed and the femoral canal structure was preserved. The femur could then be reconstructed with a stem of normal length.

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