A Benefit Cost Study of a new Preschool Program Based on Neuroplasticity

38 p. An Honors Paper presented to the Department of Economics in 2006 Adviser: Bill Harbaug

Effect of a surgical approach on the intra-articular architecture of the temporomandibular joint - an animal study

Objective: This study investigated the effect of a surgical approach on the intra-articular architecture of the temporomandibular joint. Materials and Methods: The temporomandibular joints of 4 merino sheep were subject to surgical exposure without intra-articular surgery. The animals were sacrificed 3 months following the operation. Four unoperated joints from 4 other sheep served as controls. The surgically approached joints and the unoperated control joints were evaluated and compared radiologically, macroscopically, and histologically. Results: The surgically approached joints did not develop any degenerative changes. No significant differences were found between the surgically approached joints and the control unoperated joints. Conclusion: Study results indicate that a surgical approach alone has no intra-articular effects on the architecture of the temporomandibular joint. © 2009 Asian Association of Oral and Maxillofacial Surgeons.Nobumi Ogi, Kenichi Kurita, Jun-Ichi Ishimaru, Alastair N Gos

Short-term effect of fresh disk allograph on the osteoarthrotic sheep temporomandibular joint

Available online 30 June 2004.Abstract. The aim of this experimental study is to evaluate the effect of fresh disk allograft on the osteoarthrotic temporomandibular joints in four sheep. Study design. Bilateral osteoarthrosis was induced in the sheep's temporomandibular joint. Three months later, unilateral diskectomy and fresh disk allograft repair were performed, with the contralateral joint being left as a control. At 6 months after the initial procedure, 3 months after the repair, the four sheep were sacrificed. Results. It was found that the operated joint was fibrously repaired without ankylosis, whereas the control joint showed progressive disease. One grafted disk survived, but the other three were perforated and displaced. Conclusion. Fresh disk allograft does temper progression of the disease in the early stages.Nobumi Ogi, Kenichi Kurita, Yujiro Handa and Alastair N Gos

Short-term effect of the use of a frozen-stored disc allograft for repair of the osteoarthritic sheep temporomandibular joint: a preliminary report

PurposeThe purpose of this experimental study was to evaluate the initial effect of a frozen-stored disc allograft on the osteoarthritic sheep temporomandibular joint (TMJ).Materials and methodsBilateral osteoarthritis was induced in the TMJ of four sheep. Three months later, unilateral discectomy and frozen-stored disc allograft replacement were performed. The donor disc had been obtained from a healthy animal at killing. The disc was stored in a deep freezer at -70 degrees C for 1 month and thawed just before grafting. The contralateral joints were undisturbed and served as a control at 3 months. At 6 months after the initial procedure, 3 months after the repair, the four sheep were killed.ResultsAll four grafted discs were perforated and displaced. In the repaired joints, the condylar articular surface was partly denuded in some areas, and part of the surface showed fibrous repair. The control joints showed osteoarthritic changes.ConclusionFrozen-stored disc allograft is not a satisfactory interpositional material in the osteoarthritic sheep TMJ