BACKGROUND We aimed to use the animal model of dynamic fixation to examine the interaction of the pedicle screw surface with surrounding bone, and determine whether pedicle screws achieve good mechanical stability in the vertebrae. METHODS Twenty-four goats aged 2-3 years had Cosmic ® pedicle screws implanted into both sides of the L2-L5 pedicles. Twelve goats in the bilateral dynamic fixatio...

The treatment of chronic osteomyelitis is often straightforward and effective. An episode of acute recrudescence often responds to rest and antibiotics. A discharging sinus may be caused by a sequestrum, the removal of which is followed by healing. Obliteration of cavities by bone grafting and cover by flap or pedicle graft has been advocated. Saucerisation and closure, after removal of sequest...

Patients who have undergone surgical hemi/segmental/subtotal mandibulectomy for various reasons with resulting mandibular deviation are given a guide flange. If secondary osseous grafting is planned, the doctor must wait graft, lesion, or radiotherapeutic effects to resolve. A definitive prosthesis can be planned only when graft has been healed. During this time lag, patient fitted rectify caus...

  Background: Electrical injury is daily compromise of our life and upper and lower extremities   are common sites of injury .   Case Presentation: A 23 years old man who had suffered high voltage electrical injury referred   to our center. He had severe left upper extremity burn and suffered from head and thoracic   injuries due to falling down from high altitude.   Treatment: Fasciotomy of th...

Surgeons can now control osteogenesis through local application of BMP-2. BMP’s are osteoinductive proteins that are located in bone matrix and are responsible for embryonic skeletal formation and bone healing. Marshal Urist first coined the term “bone morphogenic protein” over 40 years ago. Recombinant human BMP-2 is an osteoinductive growth factor that has the potential to make autogenous bon...

INTRODUCTION Pedicle screw fixation in a severely osteoporotic spine remains a challenge for orthopaedic surgeons. Previous studies have demonstrated that pedicle screw fixation is highly correlated to the bone mineral density [1], and increasing the screw’s pullout strength can be achieved using a variety of methods, these include the use of pedicle screws with various designs [2,3]. However, ...

Previous traditional surgery is simple removal of nucleus pulposus, but the study of Eie et al. shows high recurrence rate of lumbago and herniation after such surgery, 3 therefore, fusion internal fixation of interbody fusion cage combined with bilateral pedicle internal fixation system is often used for treatment at present, so that three-dimensional fixation can be achieved at fused lumbar s...

Gingival recession can result in an unesthetic appearance, hypersensitivity, and root caries. The physiological well-being of the patient is a significant factor associated with the success of dental therapy. Esthetics is one of the main concerns of the patient if recession is present especially in anteriors. Hence, the treatment of choice for root coverage for the anterior teeth should address...

Many successful attempts to increase pullout strength of pedicle screws in osteoporotic bone have been accompanied with an increased risk of catastrophic damage to the patient. To avoid this, a single-armed expansive pedicle screw was designed to increase fixation strength while controlling postfailure damage away from the nerves surrounding the pedicle. The screw was then subsequently tested i...

INTRODUCTION Motor endplate reinnervation is critical for restoring motor function of the denervated muscle. We developed a novel surgical technique called nerve-muscle-endplate band grafting (NMEG) for muscle reinnervation. METHODS Experimentally denervated sternomastoid muscle in the rat was reinnervated by transferring a NMEG from the ipsilateral sternohyoid muscle to the native motor zone...