Osteosynthesis in induced tibial segmental defect using co-precipitated hydroxyapatite gel and titanium mesh cage in rabbits (Oryctolagus cuniculus)
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Date
2022-09, 2022-09
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G. B. Pant University of Agriculture and Technology, Pantnagar
G. B. Pant University of Agriculture and Technology, Pantnagar
G. B. Pant University of Agriculture and Technology, Pantnagar
Abstract
The present study was conducted in (12) clinically healthy adult New Zealand white rabbits (1.5-2.0 years old), of either sex weighing 1.5-2.0 kg and they were subjected to induction of segmental defect in tibia under general anaesthesia. Thereafter, insertion of intramedullary titanium pin along with cylindrical titanium mesh cage and injectable co-precipitated HA gel used for reconstruction of segmental defect in tibia. All rabbits were divided randomly in two groups (A and B) with 6 animals in each group. In rabbits of Group A fracture fragments were stabilized with titanium mesh and titanium screws. While in rabbits of Group B, fracture fragments were stabilized with titanium mesh cage, reinforced with intramedullary pin and injectable co- precipitated HA ladened Mg-gelatin-collagen gel was used. The common features included in each rabbits of both the groups were anaesthetic regimen – premedication with glycopyrrolate, xylazine and induction of ketamine anaesthesia was pursued. Maintenance of anaesthesia was done with Isoflurane @ 1-1.5 percent concentration of with 100 percent oxygen saturation. On the basis of evaluation of parameters, better wound healing was observed in animals of Group B as compared to animals of Group A. On the basis of biochemical parameters, faster and better wound healing was observed in rabbits of Group B. Estimation of haematological and biochemical parameters were done at day 0, 7, 15, 30 and 60. There was a significant increase in serum values of ALP, calcium, phosphorus, blood glucose and decrease in magnesium, total protein. Radiological findings showed faster rate of healing and earlier reduction in gap (1.00 cm) and moderately higher radio-denser area at induced segmental defect in tibia of animals of Group B. On gross observation of test bones, negligible gap was observed at induced segmental defect in animals of Group B depicting faster healing, mineralization of developed callus and bridging of segmental defect as compared to animals of Group A. There was new bone formation found around the external circumference of the cage which was bridging the proximal and distal bone cage junction. Exuberant callus formation was found around the cage in animals of Group B. The implant remained completely stable, in correct alignment and found in pre-experimental state in animals of Group B. Titanium
mesh cage used here act as scaffold for bony restoration, allows vascular supply both to the mucosa and bone during regeneration phase. The construct used here for osteosynthesis of induced segmental defect at tibia provided adequate mechanical strength, augment limb stability and early bone continuity. Conclusively a better fracture healing was observed in rabbits of Group B as compared to rabbits of Group A and it reveals that the co-precipitated HA gel used act as scaffold for bony restoration and hence it possess attributes of biodegradability, biocompatibility. The above mentioned technique can be use for treatment of long bone segmental defect as it has got wide scope to be used in clinical veterinary practice. In the present study the outcome of surgical management of large segmental defects in tibia using cylindrical titanium mesh cage was found to be effective for treatment of LBSD.
The present study was conducted in (12) clinically healthy adult New Zealand white rabbits (1.5-2.0 years old), of either sex weighing 1.5-2.0 kg and they were subjected to induction of segmental defect in tibia under general anaesthesia. Thereafter, insertion of intramedullary titanium pin along with cylindrical titanium mesh cage and injectable co-precipitated HA gel used for reconstruction of segmental defect in tibia. All rabbits were divided randomly in two groups (A and B) with 6 animals in each group. In rabbits of Group A fracture fragments were stabilized with titanium mesh and titanium screws. While in rabbits of Group B, fracture fragments were stabilized with titanium mesh cage, reinforced with intramedullary pin and injectable co- precipitated HA ladened Mg-gelatin-collagen gel was used. The common features included in each rabbits of both the groups were anaesthetic regimen – premedication with glycopyrrolate, xylazine and induction of ketamine anaesthesia was pursued. Maintenance of anaesthesia was done with Isoflurane @ 1-1.5 percent concentration of with 100 percent oxygen saturation. On the basis of evaluation of parameters, better wound healing was observed in animals of Group B as compared to animals of Group A. On the basis of biochemical parameters, faster and better wound healing was observed in rabbits of Group B. Estimation of haematological and biochemical parameters were done at day 0, 7, 15, 30 and 60. There was a significant increase in serum values of ALP, calcium, phosphorus, blood glucose and decrease in magnesium, total protein. Radiological findings showed faster rate of healing and earlier reduction in gap (1.00 cm) and moderately higher radio-denser area at induced segmental defect in tibia of animals of Group B. On gross observation of test bones, negligible gap was observed at induced segmental defect in animals of Group B depicting faster healing, mineralization of developed callus and bridging of segmental defect as compared to animals of Group A. There was new bone formation found around the external circumference of the cage which was bridging the proximal and distal bone cage junction. Exuberant callus formation was found around the cage in animals of Group B. The implant remained completely stable, in correct alignment and found in pre-experimental state in animals of Group B. Titanium mesh cage used here act as scaffold for bony restoration, allows vascular supply both to the mucosa and bone during regeneration phase. The construct used here for osteosynthesis of induced segmental defect at tibia provided adequate mechanical strength, augment limb stability and early bone continuity. Conclusively a better fracture healing was observed in rabbits of Group B as compared to rabbits of Group A and it reveals that the co-precipitated HA gel used act as scaffold for bony restoration and hence it possess attributes of biodegradability, biocompatibility. The above mentioned technique can be use for treatment of long bone segmental defect as it has got wide scope to be used in clinical veterinary practice. In the present study the outcome of surgical management of large segmental defects in tibia using cylindrical titanium mesh cage was found to be effective for treatment of LBSD.
The present study was conducted in (12) clinically healthy adult New Zealand white rabbits (1.5-2.0 years old), of either sex weighing 1.5-2.0 kg and they were subjected to induction of segmental defect in tibia under general anaesthesia. Thereafter, insertion of intramedullary titanium pin along with cylindrical titanium mesh cage and injectable co-precipitated HA gel used for reconstruction of segmental defect in tibia. All rabbits were divided randomly in two groups (A and B) with 6 animals in each group. In rabbits of Group A fracture fragments were stabilized with titanium mesh and titanium screws. While in rabbits of Group B, fracture fragments were stabilized with titanium mesh cage, reinforced with intramedullary pin and injectable co- precipitated HA ladened Mg-gelatin-collagen gel was used. The common features included in each rabbits of both the groups were anaesthetic regimen – premedication with glycopyrrolate, xylazine and induction of ketamine anaesthesia was pursued. Maintenance of anaesthesia was done with Isoflurane @ 1-1.5 percent concentration of with 100 percent oxygen saturation. On the basis of evaluation of parameters, better wound healing was observed in animals of Group B as compared to animals of Group A. On the basis of biochemical parameters, faster and better wound healing was observed in rabbits of Group B. Estimation of haematological and biochemical parameters were done at day 0, 7, 15, 30 and 60. There was a significant increase in serum values of ALP, calcium, phosphorus, blood glucose and decrease in magnesium, total protein. Radiological findings showed faster rate of healing and earlier reduction in gap (1.00 cm) and moderately higher radio-denser area at induced segmental defect in tibia of animals of Group B. On gross observation of test bones, negligible gap was observed at induced segmental defect in animals of Group B depicting faster healing, mineralization of developed callus and bridging of segmental defect as compared to animals of Group A. There was new bone formation found around the external circumference of the cage which was bridging the proximal and distal bone cage junction. Exuberant callus formation was found around the cage in animals of Group B. The implant remained completely stable, in correct alignment and found in pre-experimental state in animals of Group B. Titanium mesh cage used here act as scaffold for bony restoration, allows vascular supply both to the mucosa and bone during regeneration phase. The construct used here for osteosynthesis of induced segmental defect at tibia provided adequate mechanical strength, augment limb stability and early bone continuity. Conclusively a better fracture healing was observed in rabbits of Group B as compared to rabbits of Group A and it reveals that the co-precipitated HA gel used act as scaffold for bony restoration and hence it possess attributes of biodegradability, biocompatibility. The above mentioned technique can be use for treatment of long bone segmental defect as it has got wide scope to be used in clinical veterinary practice. In the present study the outcome of surgical management of large segmental defects in tibia using cylindrical titanium mesh cage was found to be effective for treatment of LBSD.