No abstract available.
Burns* ; Humans

We developed an animal model to recreate the condition of an open fracture in communication with the maxillary sinus. We then studied wound healing of the sinus wall structures following fracture in the presence of autogenous bone and alloplastic implant. This model is designed to simulate the repair of an orbital floor fracture in humans. The New Zealand White rabbit was used as the animal model. Standardized 8mm defects were made bilaterally in the maxillary sinuses to include bone and mucosa in 36 rabbits. Two different implants and autogenous calvarial bone graft were placed in the soft-tissue pockets to obturate the defects, exposing one surface of the implant to the open sinus. Medpor porous polyethylene, silicone and calvarial bone implant were compared. Animals were killed at 1, 2 and 8 weeks after implantation. Gross examination of the specimens for the amount of mucosal closure and implant tissue fixation was performed. Histological sections were evaluated for bone and soft-tissue morphology juxtaposed to the implant. Complete closure of the mucosal defect was demonstrated with each type of implant. Medpor implants showed both vascular and soft-tissue ingrowth into pores by week 1. Bone ingrowth was seen by week 2. Closure of the Medpor obturated defects occurred more rapidly than in the silicone group. The Medpor implants and calvarial bone demonstrated bone and soft-tissue fixation, callus formation and maturation, while mature overlying mucosa was reconstituted over the defects. Silicone implants demonstrated a fibrous tissue reaction within 1 week of implantation and they never became fixed to bone or soft tissue. Maxillary sinus wall regeneration occurred in all defects. This study supports clinical observations of maxillary sinus wall regeneration in humans.
Animals ; Bony Callus ; Fractures, Open ; Humans ; Maxillary Sinus ; Models, Animal ; Mucous Membrane ; New Zealand ; Orbit ; Polyethylene ; Rabbits ; Regeneration ; Silicones ; Tissue Fixation ; Transplants ; Wound Healing

No abstract available.
Hearing*

The purpose of this study was to investigate the correlations between endothelial cell loss rate at one week, one month, three months, and six months after penetrating keratoplasty and clinical factors including recipient age, donor age, preoperative endothelial cell densities of the donors and preoperative diagnoses of the recipients. Among the 70 patients who underwent penetrating keratoplasty at Chonbuk University Hospital from December 1996 to January 1999, 30 eyes of 30 patients that showed reasonable endothelial resolution by non-contact specular microscopy during the follow up period of 6 months were chosen and evaluated.The cell density decreased continuously during the observation period. Endothelial cell loss rate averaged 11.5%at one week, 19.0% at one month, 25.0%at three months and 30.0%at six months after penetrating keratoplasty. Endothelial cell loss rate showed no significant correlation with donor age, recipient age, preoperative cell density at any examination period[r+/-0.4, p0.05]. Preoperative endothelial cell density showed significant correlation with postoperative endothelial cell density at each examination period[r0.7, p<0.05]. The rate of endothelial loss in the keratoconus group was significantly lower than those of bullous keratopathy or corneal leukoma groups at three months after penetrating keratoplasty[Wilcoxon test, p<0.05].
Cell Count ; Corneal Opacity ; Diagnosis ; Endothelial Cells* ; Follow-Up Studies ; Humans ; Jeollabuk-do ; Keratoconus ; Keratoplasty, Penetrating* ; Microscopy ; Tissue Donors

No abstract available.

No abstract available.

PURPOSE: The study was designed to evaluate the clinical results of an anterior chamber intraocular lens implantation (Nuvita MA 20 implantation) on high myopic patients. METHODS: We reviewed the clinical results of Nuvita MA 20 implantation surgery in 6 high myopic patients (11 eyes) with more than -7.0 diopters (D) for a year after the surgery. One patient was male,five patients were female and the mean age was 31.5 years old (25~41 years old). RESULTS: Mean preoperative spherical equivalent was -16.61 4.9 D and mean postoperative spherical equivalent was -0.9+/-0.5 D at 1 week, -1.275+/-1.14 D at 1 month, -1.14+/-1.22 D at 3 months, -1.18+/-1.18 D at 6 months and -1.05+/-1.2 D at 12 months. Mean uncorrected visual acuity preoperatively was 0.03+/-0.06 and postoperatively was 0.6+/-0.25 at 1 week, 0.57+/-0.25 at 1 month, 0.67+/-0.4 at 6 months, 0.8+/-0.32 at 12 months. Postoperative complications included 6 eyes of IOL rotation (55%), 4 eyes of pupil distortion (36%), 1 eye of intraocular pressure elevation (9%), 1 eye of pupillary block (9%), 1 eye of IOL decentration (9%) and 1 eye of nuclear cataract (9%), but serious postoperative complications such as retinal detachment and bullous keratopathy were not found. Mean endothelial cell density was 2677+/-148 (cells/mm2) at preoperative period, 2576+/-167 (cells/mm2) at 1 month, 2546+/-127 (cells/mm2) at 3 months, 2490+/-171 (cells/mm2) at 6 months and 2408+/-133 (cells/mm2) at 12 months. CONCLUSIONS: The implantation of Nuvita MA 20 into anterior chamber is considered to be a safe method of treatment for patients with high myopia.
Anterior Chamber* ; Cataract ; Endothelial Cells ; Female ; Humans ; Intraocular Pressure ; Lens Implantation, Intraocular ; Lenses, Intraocular* ; Myopia* ; Postoperative Complications ; Preoperative Period ; Pupil ; Retinal Detachment ; Visual Acuity

Purpose: We report a case of post-pterygium excisional Pseudallescheria boydii (P. boydii) necrotizing scleritis successfully treated with multi-antifungal agents.Case summary: A 73-year-old female with a history of pterygium excision 6 years prior was referred to our institute because of worsening scleritis in the left eye during high-dose, 2-week steroid treatment. On the initial visit, an oval ulcer was observed in the temporal sclera adjacent to the limbus. All steroids were stopped and 1% voriconazole, 5% natamycin, 2.5% vancomycin, and 5% ceftazidime eyedrops were applied every hour and oral voriconazole 200 mg prescribed once a day, but the scleral necrosis continued to worsen. On day 10, the filamentous fungus P. boydii was isolated; 0.5% caspofungin eyedrops were added and the topical voriconazole concentration increased to 2%. Six weeks later, despite epithelization over the scleral necrosis, choroidal detachment developed. The antifungal treatment was continued and a dispersive, ophthalmic viscosurgical device inserted in the anterior chamber. At 14 weeks of treatment, the scleral necrosis was completely epithelialized and the choroidal detachment had disappeared. Conclusions When encountering a case of P. boydii-caused necrotizing scleritis developing after pterygium excision surgery, long-term intensive treatment with several antifungal agents must be considered.

Odontogenic keratocysts are developmental odontogenic cysts which derived from rests of dental laminas and often found in posterior area of mandible. Because this lesion has tendency of frequent recurrence, treatment of choice is often radical removal of the lesion. Sometimes in case of large cysts, however, conservative therapy like marsupialization is often selected in treatment plan. A 39-years old woman referred to our department for evaluation of large radiolucent lesion that occupies the areas from mandible angle to upper part of ramus and condyle. In cytology, the lesion was identified as odontogenic keratocyst. Marsupialization was our treatment of choice, and the result was so favorable. 2 years later, there was small radiolucent lesion on upper part of mandibular ramus on panoramic view. It was suspected as recurred lesion, and excisional biopsy was done. On biopsy result, it was not a cystic lesion but fibrosis.
Adult ; Biopsy ; Female ; Fibrosis* ; Humans ; Mandible ; Odontogenic Cysts* ; Recurrence

No abstract available.
Humans ; Immunity, Cellular* ; Lung*