The Experts below are selected from a list of 162 Experts worldwide ranked by ideXlab platform
Yavuz Uyar - One of the best experts on this subject based on the ideXlab platform.
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biocompatibility of Vitallium as ossicular reconstruction material in the middle ear experimental animal study
Acta Oto-laryngologica, 2005Co-Authors: Cagatay Han Ulku, Mustafa Cihat Avunduk, Yavuz Uyar, Hamdi ArbagAbstract:Conclusion Although long-term data will be necessary for confirmation, the result of this preliminary study indicates that Vitallium may be a good alternative material for ossicular replacement prostheses in the middle ear. Objectives To investigate the biocompatibility of Vitallium (Co–Cr–Mo) as ossicular reconstruction material in the rabbit middle ear, and to compare the results with those obtained with titanium, well known as a highly biocompatible material, and non-implanted control groups. Material and methods Eighteen female New Zealand White rabbits were anesthetized. The tympanomeatal flap was elevated and 12 Vitallium and 12 titanium implants were placed in the bulla away from the ossicles in 24 middle ears. Six rabbits were used as non-implanted controls. All animals were sacrificed under general anesthesia on the 180th day after implantation. The temporal bones were removed, fixed in 10% buffered paraformaldehyde and decalcified for a week in EDTA. Tissue samples were then prepared using an Au...
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Biocompatibility of Vitallium as ossicular reconstruction material in the middle ear
Otolaryngology-Head and Neck Surgery, 2004Co-Authors: Cagatay Han Ulku, Mustafa Cihat Avunduk, Yavuz UyarAbstract:Abstract Problem: We aimed to investigate the biocompatibility of Vitallium (Co-Cr-Mo) as a reconstruction material in the rabbit middle ear, and compared the results with the titanium, well known as a high biocompatibile material, and the control groups. Methods: Eighteen female New Zealand white rabbits were anesthetized with ketamine-hydrochloride and xylocain-HCl + parahydroxibenzoic acid methyl ester. Tympanomeatal flap was elevated. Twelve Vitallium and 12 titanium free implants were placed in the bulla away from the ossicles in 24 middle ears. Six rabbits were left as a control group. All animals were euthanized under general anesthesia. The temporal bones were removed, fixed in 10% buffered paraformaldehyde, and decalcified. Then the tissue samples were preparated with autotechnicon and embedded in paraffin. Sections of 30-μm thickness were cut with a microtome, stained with HematoxylenEosin, Van Gieson’s and Fibroblast Growth Factor, and then all stained sections were examined with a light microscope. Histologic studies of the middle ears were performed on the 180th day after implantation. One-way ANOVA with Tukey’s post-hoc test was utilized to determine the relationship among the number of lymphocytes, collagen fibers, and FGR-positive cells in all groups. Results: There was not a considerable change in collagen tissue of all the groups ( P > 0.05). No significant difference was found in the number of lymphocytes and the number of FGR positive cells between the titanium and the Vitallium groups ( P > 0.05). The difference in the number lymphocytes and the number of FGR positive cells between control and other groups was found to be significant ( P Conclusion: Although long-term data will be necessary, the result of this preliminary experimental study indicates that Vitallium may be a good alternative material for ossicular replacement prostheses in the middle ear. Significance: Before adopting any materials for ossicular replacement in the human middle ear, they should be tested in animals.
Cagatay Han Ulku - One of the best experts on this subject based on the ideXlab platform.
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biocompatibility of Vitallium as ossicular reconstruction material in the middle ear experimental animal study
Acta Oto-laryngologica, 2005Co-Authors: Cagatay Han Ulku, Mustafa Cihat Avunduk, Yavuz Uyar, Hamdi ArbagAbstract:Conclusion Although long-term data will be necessary for confirmation, the result of this preliminary study indicates that Vitallium may be a good alternative material for ossicular replacement prostheses in the middle ear. Objectives To investigate the biocompatibility of Vitallium (Co–Cr–Mo) as ossicular reconstruction material in the rabbit middle ear, and to compare the results with those obtained with titanium, well known as a highly biocompatible material, and non-implanted control groups. Material and methods Eighteen female New Zealand White rabbits were anesthetized. The tympanomeatal flap was elevated and 12 Vitallium and 12 titanium implants were placed in the bulla away from the ossicles in 24 middle ears. Six rabbits were used as non-implanted controls. All animals were sacrificed under general anesthesia on the 180th day after implantation. The temporal bones were removed, fixed in 10% buffered paraformaldehyde and decalcified for a week in EDTA. Tissue samples were then prepared using an Au...
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Biocompatibility of Vitallium as ossicular reconstruction material in the middle ear
Otolaryngology-Head and Neck Surgery, 2004Co-Authors: Cagatay Han Ulku, Mustafa Cihat Avunduk, Yavuz UyarAbstract:Abstract Problem: We aimed to investigate the biocompatibility of Vitallium (Co-Cr-Mo) as a reconstruction material in the rabbit middle ear, and compared the results with the titanium, well known as a high biocompatibile material, and the control groups. Methods: Eighteen female New Zealand white rabbits were anesthetized with ketamine-hydrochloride and xylocain-HCl + parahydroxibenzoic acid methyl ester. Tympanomeatal flap was elevated. Twelve Vitallium and 12 titanium free implants were placed in the bulla away from the ossicles in 24 middle ears. Six rabbits were left as a control group. All animals were euthanized under general anesthesia. The temporal bones were removed, fixed in 10% buffered paraformaldehyde, and decalcified. Then the tissue samples were preparated with autotechnicon and embedded in paraffin. Sections of 30-μm thickness were cut with a microtome, stained with HematoxylenEosin, Van Gieson’s and Fibroblast Growth Factor, and then all stained sections were examined with a light microscope. Histologic studies of the middle ears were performed on the 180th day after implantation. One-way ANOVA with Tukey’s post-hoc test was utilized to determine the relationship among the number of lymphocytes, collagen fibers, and FGR-positive cells in all groups. Results: There was not a considerable change in collagen tissue of all the groups ( P > 0.05). No significant difference was found in the number of lymphocytes and the number of FGR positive cells between the titanium and the Vitallium groups ( P > 0.05). The difference in the number lymphocytes and the number of FGR positive cells between control and other groups was found to be significant ( P Conclusion: Although long-term data will be necessary, the result of this preliminary experimental study indicates that Vitallium may be a good alternative material for ossicular replacement prostheses in the middle ear. Significance: Before adopting any materials for ossicular replacement in the human middle ear, they should be tested in animals.
Ayesha Abdeen - One of the best experts on this subject based on the ideXlab platform.
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fracture of a tapered femoral neck after total hip arthroplasty a case report
Journal of Bone and Joint Surgery American Volume, 2014Co-Authors: Michael D Baratz, Ayesha AbdeenAbstract:Fracture of the femoral component after total hip arthroplasty is an uncommon event according to Swedish registry data1 and retrospective data in the United States2. Early monoblock components demonstrated fatigue fracturing through the implant stem3-5. Fracture through the tapered femoral neck is extremely rare, although it has been reported6-10. We describe a case of fracture through the tapered neck of a cementless femoral component that had been coupled with a skirted femoral head with a high neck length. The patient was informed that data concerning the case would be submitted for publication, and she provided consent. A sixty-one-year-old woman had undergone primary total hip arthroplasty with an uncemented prosthesis for osteoarthritis of the left hip in February 2004. The procedure had been performed at an outside institution. A modified Hardinge approach had been used. The components included a Meridian (Howmedica) uncemented size-4 femoral stem, a 32-mm femoral head with a +16-mm skirted neck length, a Trident (Howmedica) 54-mm hemispherical acetabular shell, and a 54/32-mm 10° liner. The femoral stem and head were both composed of forged Vitallium, an alloy consisting of 60% cobalt, 20% chromium, and 5% molybdenum, among other substances. This stem was only available in a standard offset and had a 30-mm neck length and a neck-shaft angle of 132°. The tapered neck was a V40 taper. As was routine for the surgeon who had performed the index procedure, the anterior third of the abductor was elevated off of the greater trochanter for exposure, and then repaired with two screw anchors. The index operative report stated that a skirted head with a +16-mm neck length was required to provide appropriate soft-tissue tension and stability of the construct. Documentation from the outside hospital did not mention a preoperative …
Mustafa Cihat Avunduk - One of the best experts on this subject based on the ideXlab platform.
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biocompatibility of Vitallium as ossicular reconstruction material in the middle ear experimental animal study
Acta Oto-laryngologica, 2005Co-Authors: Cagatay Han Ulku, Mustafa Cihat Avunduk, Yavuz Uyar, Hamdi ArbagAbstract:Conclusion Although long-term data will be necessary for confirmation, the result of this preliminary study indicates that Vitallium may be a good alternative material for ossicular replacement prostheses in the middle ear. Objectives To investigate the biocompatibility of Vitallium (Co–Cr–Mo) as ossicular reconstruction material in the rabbit middle ear, and to compare the results with those obtained with titanium, well known as a highly biocompatible material, and non-implanted control groups. Material and methods Eighteen female New Zealand White rabbits were anesthetized. The tympanomeatal flap was elevated and 12 Vitallium and 12 titanium implants were placed in the bulla away from the ossicles in 24 middle ears. Six rabbits were used as non-implanted controls. All animals were sacrificed under general anesthesia on the 180th day after implantation. The temporal bones were removed, fixed in 10% buffered paraformaldehyde and decalcified for a week in EDTA. Tissue samples were then prepared using an Au...
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Biocompatibility of Vitallium as ossicular reconstruction material in the middle ear
Otolaryngology-Head and Neck Surgery, 2004Co-Authors: Cagatay Han Ulku, Mustafa Cihat Avunduk, Yavuz UyarAbstract:Abstract Problem: We aimed to investigate the biocompatibility of Vitallium (Co-Cr-Mo) as a reconstruction material in the rabbit middle ear, and compared the results with the titanium, well known as a high biocompatibile material, and the control groups. Methods: Eighteen female New Zealand white rabbits were anesthetized with ketamine-hydrochloride and xylocain-HCl + parahydroxibenzoic acid methyl ester. Tympanomeatal flap was elevated. Twelve Vitallium and 12 titanium free implants were placed in the bulla away from the ossicles in 24 middle ears. Six rabbits were left as a control group. All animals were euthanized under general anesthesia. The temporal bones were removed, fixed in 10% buffered paraformaldehyde, and decalcified. Then the tissue samples were preparated with autotechnicon and embedded in paraffin. Sections of 30-μm thickness were cut with a microtome, stained with HematoxylenEosin, Van Gieson’s and Fibroblast Growth Factor, and then all stained sections were examined with a light microscope. Histologic studies of the middle ears were performed on the 180th day after implantation. One-way ANOVA with Tukey’s post-hoc test was utilized to determine the relationship among the number of lymphocytes, collagen fibers, and FGR-positive cells in all groups. Results: There was not a considerable change in collagen tissue of all the groups ( P > 0.05). No significant difference was found in the number of lymphocytes and the number of FGR positive cells between the titanium and the Vitallium groups ( P > 0.05). The difference in the number lymphocytes and the number of FGR positive cells between control and other groups was found to be significant ( P Conclusion: Although long-term data will be necessary, the result of this preliminary experimental study indicates that Vitallium may be a good alternative material for ossicular replacement prostheses in the middle ear. Significance: Before adopting any materials for ossicular replacement in the human middle ear, they should be tested in animals.
Melvin P Rosenwasser - One of the best experts on this subject based on the ideXlab platform.
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Vitallium radial head prosthesis for acute and chronic elbow fractures and fracture dislocations involving the radial head
Journal of Shoulder and Elbow Surgery, 2006Co-Authors: Cary B Chapman, Stefano M Sinicropi, Roderick Bruno, Robert J Strauch, Melvin P RosenwasserAbstract:This retrospective study aims to evaluate the radiographic, functional, and patient-derived outcomes of 16 patients who each received a Vitallium radial head prosthesis for unreconstructable acute fractures of the radial head, as well as previously treated fractures of the radial head associated with residual instability, pain, and stiffness. Follow-up averaged 33 months. A trend toward greater disability and poorer motion was noted in the delayed treatment group compared with the acute replacement group. Overall, the results were excellent in 5 patients, good in 10, and poor in 1, as determined by the Mayo Elbow Performance Score. All elbows were stable at follow-up, and no patient reported wrist pain. Four required further operative treatment of their elbow injuries. Metallic radial head arthroplasty yields satisfactory results in acute unreconstructable radial head fractures or as a salvage procedure for previously treated radial head fractures.
