Brian Grossman - Academia.edu (original) (raw)
Papers by Brian Grossman
Veterinary Surgery, 1980
A prosthesis designed to partially replace the articular surfaces of the radial and third carpal ... more A prosthesis designed to partially replace the articular surfaces of the radial and third carpal bones was implanted bilaterally in 6 normal horses. The prosthesis consisted of a convex metal alloy component, and a concave ultra-high molecular weight polyethylene component, for implantation into the radial and third carpal bones, respectively. One horse underwent the soft tissue approach only to serve as a control. Effects on joint motion and pathologic changes were monitored over a 6-month period using clinical examination, synovial fluid analysis, electrogoniometry, high-speed cinematography, radiography, and gross and microscopic pathologic examination. Six months following implantation, all horses that received implants would trot, with slight to moderate lameness. Electrogoniometric and cinematographic evaluation of joint motion demonstrated a reduction in amplitude of the carpus in 4 horses receiving implants; however, in 2 horses, the reduction was less than, or equivalent to, that of the control horse. One horse that received the prosthesis was rideable, and was able to run with minimal lameness. Radiography, synovial fluid analysis, and gross and microscopic pathologic examination revealed varying degrees of synovitis and osteoarthritis. Biomechanical alterations of the middle carpal joint and release of wear particles from the prosthesis were considered to be major causes of these secondary changes. Changes in design of the prosthesis, intended to more accurately maintain normal joint biomechanics are proposed.
Journal of Equine Veterinary Science, 1981
Surgical exposure of intra-oral and intra-pharyngeal lesions in the horse is not easy due to the ... more Surgical exposure of intra-oral and intra-pharyngeal lesions in the horse is not easy due to the difficulty of providing adequate exposure while avoiding unnecessary trauma. Various techniques have been described, including the oral approach.t-r'" pharyngotomy,' Iaryngotomy,' and mandibular symphysioromy.? The mandibular symphysiotomy approach provides adequate exposure to intra-oral and intra-pharyngeal lesions, including the soft palate; however the technique requires incision of the lower lip, which may lead to dehiscence, delayed oral intake, or muscular dysfunction with chronically impaired prehension." The lips of the horse are vital prehensile organs; therefore, a surgical approach which spares normal labial anatomy, offers the advantages of preservation of function, and decreased post-operative complications. This report describes a lip-sparing modification of the mandibular symphysiotomy approach for intra-oral surgery of the horse, which has been used for correction of cleft palatal defects in foals.
Veterinary …, 1980
A prosthesis designed to partially replace the articular surfaces of the radial and third carpal ... more A prosthesis designed to partially replace the articular surfaces of the radial and third carpal bones was implanted bilaterally in 6 normal horses. The prosthesis consisted of a convex metal alloy component, and a concave ultra-high molecular weight polyethylene component, for implantation into the radial and third carpal bones, respectively. One horse underwent the soft tissue approach only to serve as a control. Effects on joint motion and pathologic changes were monitored over a 6-month period using clinical examination, synovial fluid analysis, electrogoniometry, high-speed cinematography, radiography, and gross and microscopic pathologic examination. Six months following implantation, all horses that received implants would trot, with slight to moderate lameness. Electrogoniometric and cinematographic evaluation of joint motion demonstrated a reduction in amplitude of the carpus in 4 horses receiving implants; however, in 2 horses, the reduction was less than, or equivalent to, that of the control horse. One horse that received the prosthesis was rideable, and was able to run with minimal lameness. Radiography, synovial fluid analysis, and gross and microscopic pathologic examination revealed varying degrees of synovitis and osteoarthritis. Biomechanical alterations of the middle carpal joint and release of wear particles from the prosthesis were considered to be major causes of these secondary changes. Changes in design of the prosthesis, intended to more accurately maintain normal joint biomechanics are proposed.
Journal of Pediatric Orthopaedics, 1999
We performed a retrospective review of 41 patients (ages 9-18 years) who underwent posterior spin... more We performed a retrospective review of 41 patients (ages 9-18 years) who underwent posterior spinal fusion with either Isola or Cotrel-Dubousset (CD) instrumentation to determine whether the presence of an apical hook on the thoracic convexity affected initial and long-term sagittal and coronal correction in adolescent idiopathic scoliosis surgery. A study group of 38 female and three male patients was evaluated (2-5 years of follow-up). Twenty-three patients (Group A) were treated with an up-going hook at the convex apex of the thoracic curve, and 18 patients (Group B) with similar curves were instrumented without an apical hook. Results showed that Group A's average preoperative coronal curve of 48 degrees decreased to 17 degrees , whereas Group B's preoperative average of 52 degrees decreased to 25 degrees . At follow-up, no statistical significance was noted in either coronal curve correction (p = 0.203) or sagittal kyphosis (p = 0.38) between Groups A and B. We conclude that omission of the up-going hook at the apex of the thoracic convexity can reduce postoperative discomfort in patients undergoing posterior spinal fusion, without sacrificing curve correction or balance.
Veterinary Surgery, 1980
A prosthesis designed to partially replace the articular surfaces of the radial and third carpal ... more A prosthesis designed to partially replace the articular surfaces of the radial and third carpal bones was implanted bilaterally in 6 normal horses. The prosthesis consisted of a convex metal alloy component, and a concave ultra-high molecular weight polyethylene component, for implantation into the radial and third carpal bones, respectively. One horse underwent the soft tissue approach only to serve as a control. Effects on joint motion and pathologic changes were monitored over a 6-month period using clinical examination, synovial fluid analysis, electrogoniometry, high-speed cinematography, radiography, and gross and microscopic pathologic examination. Six months following implantation, all horses that received implants would trot, with slight to moderate lameness. Electrogoniometric and cinematographic evaluation of joint motion demonstrated a reduction in amplitude of the carpus in 4 horses receiving implants; however, in 2 horses, the reduction was less than, or equivalent to, that of the control horse. One horse that received the prosthesis was rideable, and was able to run with minimal lameness. Radiography, synovial fluid analysis, and gross and microscopic pathologic examination revealed varying degrees of synovitis and osteoarthritis. Biomechanical alterations of the middle carpal joint and release of wear particles from the prosthesis were considered to be major causes of these secondary changes. Changes in design of the prosthesis, intended to more accurately maintain normal joint biomechanics are proposed.
Journal of Equine Veterinary Science, 1981
Surgical exposure of intra-oral and intra-pharyngeal lesions in the horse is not easy due to the ... more Surgical exposure of intra-oral and intra-pharyngeal lesions in the horse is not easy due to the difficulty of providing adequate exposure while avoiding unnecessary trauma. Various techniques have been described, including the oral approach.t-r'" pharyngotomy,' Iaryngotomy,' and mandibular symphysioromy.? The mandibular symphysiotomy approach provides adequate exposure to intra-oral and intra-pharyngeal lesions, including the soft palate; however the technique requires incision of the lower lip, which may lead to dehiscence, delayed oral intake, or muscular dysfunction with chronically impaired prehension." The lips of the horse are vital prehensile organs; therefore, a surgical approach which spares normal labial anatomy, offers the advantages of preservation of function, and decreased post-operative complications. This report describes a lip-sparing modification of the mandibular symphysiotomy approach for intra-oral surgery of the horse, which has been used for correction of cleft palatal defects in foals.
Veterinary …, 1980
A prosthesis designed to partially replace the articular surfaces of the radial and third carpal ... more A prosthesis designed to partially replace the articular surfaces of the radial and third carpal bones was implanted bilaterally in 6 normal horses. The prosthesis consisted of a convex metal alloy component, and a concave ultra-high molecular weight polyethylene component, for implantation into the radial and third carpal bones, respectively. One horse underwent the soft tissue approach only to serve as a control. Effects on joint motion and pathologic changes were monitored over a 6-month period using clinical examination, synovial fluid analysis, electrogoniometry, high-speed cinematography, radiography, and gross and microscopic pathologic examination. Six months following implantation, all horses that received implants would trot, with slight to moderate lameness. Electrogoniometric and cinematographic evaluation of joint motion demonstrated a reduction in amplitude of the carpus in 4 horses receiving implants; however, in 2 horses, the reduction was less than, or equivalent to, that of the control horse. One horse that received the prosthesis was rideable, and was able to run with minimal lameness. Radiography, synovial fluid analysis, and gross and microscopic pathologic examination revealed varying degrees of synovitis and osteoarthritis. Biomechanical alterations of the middle carpal joint and release of wear particles from the prosthesis were considered to be major causes of these secondary changes. Changes in design of the prosthesis, intended to more accurately maintain normal joint biomechanics are proposed.
Journal of Pediatric Orthopaedics, 1999
We performed a retrospective review of 41 patients (ages 9-18 years) who underwent posterior spin... more We performed a retrospective review of 41 patients (ages 9-18 years) who underwent posterior spinal fusion with either Isola or Cotrel-Dubousset (CD) instrumentation to determine whether the presence of an apical hook on the thoracic convexity affected initial and long-term sagittal and coronal correction in adolescent idiopathic scoliosis surgery. A study group of 38 female and three male patients was evaluated (2-5 years of follow-up). Twenty-three patients (Group A) were treated with an up-going hook at the convex apex of the thoracic curve, and 18 patients (Group B) with similar curves were instrumented without an apical hook. Results showed that Group A's average preoperative coronal curve of 48 degrees decreased to 17 degrees , whereas Group B's preoperative average of 52 degrees decreased to 25 degrees . At follow-up, no statistical significance was noted in either coronal curve correction (p = 0.203) or sagittal kyphosis (p = 0.38) between Groups A and B. We conclude that omission of the up-going hook at the apex of the thoracic convexity can reduce postoperative discomfort in patients undergoing posterior spinal fusion, without sacrificing curve correction or balance.