EFFECTS OF LAND-USE CHANGE ON SOME HYDRO-PHYSICAL PROPERTIES OF SOILS

This study was conducted to determine the effects of different land-use types on hydro-physical properties of topsoil in Bartin-Iskalan Creek Catchment located in Western Black Sea region. Duplicate topsoil samples were taken using steel cylinders (400 cm 3) at 100 different sampling points from 3 different land-use types (34 from farmlands, 34 from rangelands and 32 from forests). Data were analyzed using ANOVA, and means were compared by Tukey's test. Results indicated that forests had the highest organic matter content (4.17%), total porosity (46.66%), water holding capacity (34.19%), hydraulic conductivity (24.75 cm/h), moisture content at field capacity (29.62%) and available water (6.94%), whereas rangelands had the lowest hydraulic conductivity (2.33 cm/h), water holding capacity (29.46%), total porosity (43.08%), and organic matter content (2.73%), and farmlands had the lowest moisture content at the field capacity (28.73%) and available water capacity (3.01%) in their topsoils.Istanbul University [1541/16012001]This study was supported by Istanbul University Scientific Research Project Center (Project number: 1541/16012001)

A histomorphometric meta-analysis of sinus elevation with various grafting materials

Several grafting materials have been used in sinus augmentation procedures including autogenous bone, demineralized freeze-dried bone (DFDBA), hydroxyapatite, β-tricalcium phosphate (β-TCP), anorganic deproteinized bovine bone and combination of these and others. Up to now a subject of controversy in maxillofacial surgery and dentistry is, what is the most appropriate graft material for sinus floor augmentation

Intra-articular injection of tenoxicam in rats: Assessment of the local effects on the articular cartilage and synovium

This study investigated the possible local adverse effects of intra-articular administration of tenoxicam in the rat knee joint. A total of 50 rats were given 0.25 ml of a standard preparation of tenoxicam by injection into the right knee joint and 0.25 ml of 0.9% saline solution by injection into the left knee joint as a control. Groups of 10 rats were killed 24 h, 48 h, 7 days, 14 days and 21 days after tenoxicam administration. Two rats were sham operated; one was killed on the first day and the other on the second day after this procedure. All the joints were prepared and sectioned for histological examination. Tissue loss and oedema were observed in the specimens obtained 24 h and 48 h after treatment with tenoxicam.. No pathological changes were observed in the 7-day, 14-day and 21-day specimens, or in the control joints. Caution should be exercised when using intra-articular tenoxicam for postoperative analgesia

Multilevel decompressive laminectomy and transpedicular instrumented fusion for cervical spondylotic radiculopathy and myelopathy: A minimum follow-up of 3 years

Objective: Cervical laminectomies with transpedicular insertion technique is known to be a biomechanically stronger method in cervical pathologies. However, its frequency of use is low in the routine practice, as the pedicle is thin and risk of neurovascular damage is high. In this study, we emphasize the results of cervical laminectomies with transpedicular fixation using fluoroscopy in degenerative cervical spine disorder. Materials and Methods: Postoperative malposition of the transpedicular screws of the 70 pedicles of the 10 patients we operated due to degenerative stenosis in the cervical region, were investigated. Fixation was performed between C3 and C7, and we used resected lamina bone chips for fusion. Clinical indicators included age, gender, neurologic status, surgical indication, and number of levels stabilized. Dominant vertebral artery of all the patients was evaluated with Doppler ultrasonography. Preoperative and postoperative Nurick grade of each patient was documented. Results: No patients experienced neurovascular injury as a result of pedicle screw placement. Two patients had screw malposition, which did not require reoperation due to minor breaking. Most patients had 32-mm screws placed. Postoperative computed tomography scanning showed no compromise of the foramen transversarium. A total of 70 pedicle screws were placed. Good bony fusion was observed in all patients. At follow-up, 9/10 (90%) patients had improved in their Nurick grades. The cases were followed-up for an average of 35.7 months (30-37 months). Conclusions: Use of the cervical pedicular fixation (CPF) provides a very strong three-column stabilization but also carries vascular injury without nerve damage. Laminectomies technique may reduce the risk of malposition due to visualization of the spinal canal. CPF can be performed in a one-stage posterior procedure. This technique yielded good fusion rate without complications and can be considered as a good alternative compared other techniques