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Articles by Davood Sharifi
Total Records ( 4 ) for Davood Sharifi
  Davood Sharifi , Dauod Kazemi and Abbas Veshkini
  Problem statement: The main aim was to clinical assessment of the ultrasonographic changes of transcutaneous electrical neural stimulation after inducing injury in the SDFT in horses. Approach: Using 8 adults' castrated horses having 350-550 Kgbw with 4-6 years of age. The left hind limb and right fore-limb Superficial Digital Flexor Tendon (SDFT) were splitted longitudinally at mid metatarsal and metacarpal regions in full thickness of 10 cm in length using B.P.blade 15 time strikes, then the connective tissue and skin was approximated using No 2 Nylon. Horses were divided into two groups of control and treated with 4 horses each. No treatment was given to control one, whereas treated group was subjected to transcutaneous neural electrical stimulation for 10 min daily with intensity of 80 ┬Ás and 100 Hz frequency over 14 days using TENS apparatus newtens 900c. Ultrasonograhic examination was done using Pie Medical 200 Vet Apparatus in 0, 7, 14, 21, 28, 45 and 60 days measuring Cross-Sectional Area (CSA) of SDFT in operated limbs in each horse. For assessing the variation in this finding the Repeated Measure Analysis of Variance was used. Results: After comparing the healing process between two groups, it was significantly accelerated in treated with therapeutic ultrasound. Pain relief, swelling, tenderness, heat and functional recovery in treated with therapeutic ultrasound significantly improved comparing to control group. There was significant effect on reducing lameness in treated group by 28 days after splitting, whereas lameness persisted till 60 days in control group. Ultrasonography findings showed significant decrease in SDFT diameters and Cross Sectional Area (CSA) in the treated limbs comparing with control. Conclusion: Clinically speeding wound healing beside complete reduction of swelling, pain and lameness, its application significantly accelerated functional recovery affected limb.
  Davood Sharifi , Sarang Soroori , Saeed Hasaraki and Nazanin Jafari
  Problem statement: To determine the effect of the Tetra calcium phosphate and Diacalcium phosphate cement in comparison with bone plate in fracture repair in rabbit. Experimental in vivo study. A total of 18 adult male White New Zealand rabbits, weighing 3.0▒0.250 Kg and about 6 months old were used. They were fasted 4 h before start of experiment and were off-water even 2 h too. They were divided into 2 groups of bone plate (I) and cement (II) of 9 rabbits each which subsequently divided into 3 subgroups of 1(I a and II a) month and 2 (Ib and IIb)and 3 (Ic and IIc) months duration in each group. Approach: Under general anesthesia and aseptic condition the craniolateral surface of right radial was exposed and a piece of full thickness from mid-section of radial bone in length of 1cm was removed using electrical bone vibrator in the all rabbit. The both ends of this bone was stabilized using mini bone plate of 4 holes in the group I, whereas prehardened cylinders of cement were implanted into rabbit radial defects in the group II rabbits. Radiographs were taken on zero days after creation of gap and on 1, 2 and 3 months from each rabbit using parameters such as local changes, stabilization of implant and bone, bone formation and implant biodegradation. Results: Comparison of clinical signs in the I and II indicated that they had similar physical activity and same degree of lameness during observation period of 90 days Radiographyically keeping in view the parameters were used to evaluate the major changes revealed no sign of infection on the edges of each defect and both groups permitted stabilization of the defected bones and maintenance of correct position. The new bone formation and the implant biodegradation in the bone defects could be clearly reflected by the gradually weakened umbral on the radiographs during the whole process one repair in group I was not as perfect as those in cement or group II samples. Conclusion/Recommendations: Application of paste of tetra calcium phosphate and diacalcium phosphate indicated to have positive effect in integral formation of qualitative callus at the site of fracture and early re-organization of callus too.
  Foad Sadi , Abbas Veshkini , Davood Sharifi and M Nasroulahzadeh Masouleh
  We would like to thank to the Faculty of Specialized Veterinary Sciences research council. Science and Research Branch of Islamic Azad University, Punak Tehran for approval and financial support to finish this project. Problems statement: The purpose of this research was to determine the biological effect of cartilage graft as a bone defect filler and osteogenetic stimulation to speed up bone healing too. Approach: Sixteen adult male New Zealand white rabbits having body weight ranged from 3.0-3.5 Kg. Under general anesthesia, a segmental full thickness bone defect of 10 mm in length was created in the middle of the right radial shaft in all rabbits. They were divided into two groups of 6 rabbits each. Group I was considered as control and the fractured site was fixed using finger bone plate with 4 screws, whereas the ear cartilage of 1x1 cm graft was used to fill the gap after fracture fixation in Group II. Rabbits in two groups were subdivided into 2 subgroups of 1 and 2 months duration with 4 rabbits in each. Radiography and two dimensional and color Doppler sonography were done before and after creating defects and on 15, 30 and 60 days to evaluate local reaction as far as new blood vessels network and callus formation are concerned. Results: On the radiographs during the whole process, bone repair in Group I was not as perfect as those in Group II samples and trace of internal callus filled the gap incompletely in 60 days in Group I, whereas in Group II internal callus almost was formed on 30 days and in addition intercortical callus was seen supporting to cover and filled the gap completely in this group. Sonographic findings confirmed the protrusion of newly formed blood vascular network in 30 days in Group I and from 15 days in Group II and remarkably increased till end of observation period. Conclusion: Cartilage graft is suitable alternative bone filler and radiography and sonography are reliable techniques to trace local reaction at proper time.
  Davood Sharifi , Davood Kazemi and Hadi Latifi
  We would like to sincerely express our gratitude to the university of Tehran and faculty of veterinary medicine research council for approval and financial support for this extensive evaluation of tensile strength of the superficial digital flexor tendon in horses subjected to Transcutaneous Electrical Neural Stimulation (TENS) therapeutic regimen Problems statement: The purpose of this study was to determine the effect of TENS on the tensile strength of experimentally traumatized SDFT in horses. Approach: Eight adult castrated horses between 4-9 years-old and 310-395 Kg body-weight were considered. The left fore-limb superficial digital flexor tendon of each horse was splitted longitudinally in the middle portion in full thickness of 10 cm in length using B.P. blade (15 Times strike), then the connective tissue and skin were approximated using No 2 Nylon. Horses were divided into two groups of control and treated with 4 horses each. No treatment was given to control one, whereas treated group was subjected to the transcutaneous electrical neural stimulation (Newtens 900c) therapeutic regimens10 min daily with intensity of 80 ┬Ás, 100 Hz frequency for 14 days. After 60 days, the full length of SDFT (20 cm) was removed from the right normal countralaleral and left traumatized tendon of control and treated limbs of all horses to be subjected to test of tensile strength using Zwick/Roell MDTL Machine with speed of 0.07 mM sec-1 having Proportional Integral Deferential (PID) controller. In assessing the variation obtained data was analyzed using paired-t-test. Results: Data of the tensile strength was revealed an average 0.6625 KN for normal SDFT, 0.6375 KN for treated tendon and 0.6175 KN for control tendon .There was significant improvement in regaining tensile strength in treated tendons comparison to control ones in Conclusion: TENS significantly accelerated healing and remodeling of traumatized tendon to regain its tensile strength.
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