No abstract available.

OBJECTIVE: It has been known that the posterior pedicle screw fixation provides good mechanical stability in unstable burst fracture. But, posterior fixation without anterior column support may not be adequate to withstand the axial load and to keep the corrected kyphotic angle. We present results of one stage fixation by posterior approach in unstable burst fracture. METHODS: Nine patients with unstable burst fracture were treated with posterior fixation and intervertebral fusion using titanium mesh cages and pedicle screws. The canal decompression was achieved by laminectomy and partial pediculectomy through the posterior approach. In all cases, the short segment fixation and anterior column support with cage were performed on the one stage operation. RESULTS: Of nine patients, seven was satisfied with excellent clinical results except two cases of the Frankel's grade A. All patients had good stabilization of spinal column and enough decompression without any neurological complications. It was possible to maintain the corrected kyphotic angle with the circumferential stabilization(three column fixation). CONCLUSION: The anterior and posterior column fixation through the posterior approach provides good stability and decompression in the patients with unstable burst fracture.
Decompression* ; Humans ; Laminectomy ; Spine* ; Titanium

PURPOSE: The purpose of this study was to compare the cleansing performance of a distilled water, a diluted solution of sodium hypochlorite as a household bleaching cleanser and three alkaline peroxide cleansers in vivo plaque deposits by using scanning electron microscope. MATERIALS AND METHODS: Five individuals were selected from department of the prosthodontics in Pusan National University Hospital, and each of them was inserted with specimens for plaque accumulation in their temporary dentures for 48 hours. The specimens were removed and cleaned by each cleansing agents for 8 hours. Scanning electron micrographs were made from the specimens at a magnification of x2,000. A panel of ten persons with a dental or paradental background, but not directly involved in the study, was selected to analyze the photomicrographs to determine which denture cleanser was more effective in removing plaque. RESULTS: Diluted solution of sodium hypochlorite was the most effective at removing plaque following Polident(R), Cleadent(R)e, Bonyplus(R) and distilled water in order. But there was no significant difference of cleansing efficacy between diluted solution of sodium hypochlorite and Polident(R), Polident(R) and Cleadent(R)e, Cleadent(R)e and Bonyplus(R), respectively (P > .05). Alkaline peroxide cleansers by themselves cannot adequately remove accumulated plaque deposits, especially if the deposits are heavy. Corrosion could be seen on the surface of non-precious alloy specimens immersed in diluted solution of sodium hypochlorite. CONCLUSION: It is recommended to use of alkaline peroxide type cleansers with brushing whenever possible, since denture cleanliness is often poor due to the relative inefficiency of these cleansers.
Alloys ; Corrosion ; Denture Cleansers ; Dentures ; Detergents ; Electrons ; Family Characteristics ; Humans ; Prosthodontics ; Sodium ; Sodium Hypochlorite ; Water

PURPOSE: The present study is aimed to evaluate the combined effect of recombinant human bone morphogenetic protein 2 (rhBMP-2) and recombinant human vascular endothelial growth factor (rhVEGF) coated onto anodized implants on osseointeration. MATERIALS AND METHODS: Six New Zealand white rabbit were used in this study. Each animal received 4 implants that were either coated with rhBMP-2 and rhVEGF (Study group) or anodized implant (Control group) in both tibia. This was performed using a randomized split-mouth design. A total 24 implants were used. The implant stability quotient (ISQ) value using resonance frequency analyser and removal torque (RTQ) measurement were investigated at 2 and 8 weeks. The t-test was used for statistical analysis (alpha=.05). RESULTS: Control and study group showed good osseointegration at 8 weeks. The ISQ and RTQ values of study group were significant compared with the control group at 8 weeks (P<.05). However, No statistical significance was observed at 2 weeks (P>.05). CONCLUSION: It was concluded that rhBMP-2 with rhVEGF coated onto anodized implants can induce better osseointegration at late healing period.
Animals ; Bone Morphogenetic Protein 2 ; Humans ; New Zealand ; Osseointegration ; Pilot Projects ; Tibia ; Torque ; Vascular Endothelial Growth Factor A

PURPOSE: The purpose of this study was to compare the fit of cast gold crowns fabricated from the conventional and the digital impression technique. MATERIALS AND METHODS: Artificial tooth in a master model and abutment teeth in ten patients were restored with cast gold crowns fabricated from the digital and the conventional impression technique. The forty silicone replicas were cut in three sections; each section was evaluated in nine points. The measurement was carried out by using a measuring microscope and I-Soultion. Data from the silicone replica were analyzed and all tests were performed with α-level of 0.05. RESULTS: 1. The average gaps of cast gold crowns fabricated from the digital impression technique were larger than those of the conventional impression technique significantly. 2. In marginal and internal axial gap of cast gold crowns, no statistical differences were found between the two impression techniques. 3. The internal occlusal gaps of cast gold crowns fabricated from the digital impression technique were larger than those of the conventional impression technique significantly. CONCLUSION: Both prostheses presented clinically acceptable results with comparing the fit. The prostheses fabricated from the digital impression technique showed more gaps, in respect of occlusal surface.
Crowns* ; Humans ; Prostheses and Implants ; Silicon ; Silicones ; Tooth ; Tooth, Artificial

Implant overdenture exhibits higher retention, masticatory function, and patient's satisfaction compared to conventional dentures. Particularly, in treatment of severe alveolar bone resorption, implant overdenture can be considered as the first treatment option. The types of attachments used for implant overdenture can be classified into solitary type, which implants are not connected to each other, and bar type in which implants are connected. In the case of solitary type commonly used in clinical practice, parallel relationship is important. When it is not established, there is a higher risk of attachment wear, retention loss, and frequent visits for maintenance. In this case, satisfactory results have been obtained with implant overdentures using milled bar on two unparallel implants placed on the mandible.
Bone Resorption ; Denture, Overlay* ; Dentures ; Mandible

Fixed implant prosthesis and removable implant overdenture are the main treatment options for treating edentulous maxilla with implants. If clinicians select one of the treatment options without accurate diagnosis and evaluation, this may lead to unfavorable treatment result and one would not be able to guarantee successful long term prognosis. In this case, 69 year-old female presented with failed fixed implant prosthesis that was treated in private dental clinic. Since the patient did not want additional insertion of implants and considering factors such as oral hygiene maintenance, splinting effect, and esthetics, the patient was treated with removable implant bar type overdenture using pre-existing implants. The clinical results were satisfactory in the aspect of esthetics and masticatory function, oral hygiene maintenance.
Dental Clinics ; Denture, Overlay* ; Diagnosis ; Esthetics ; Female ; Humans ; Maxilla* ; Oral Hygiene ; Prognosis ; Prostheses and Implants* ; Splints

PURPOSE: Correction of saddle nose remains problematic both in the technique of reconstruction and in the choice of implant material for nasal augmentation. A large variety of graft materials have been used for the reconstruction of the saddle nose deformity. The purpose of this study is to determinate an algorithm for deciding alternative graft materials used in correction of saddle nose deformity. METHODS: Six patients with saddle nose who were corrected using by auricular cartilage and costal cartilage at Chosun university hospital were analyzed. RESULTS: After a mean interval of 12 months, all patients were satisfied with the esthetic and functional result. CONCLUSION: Auricular cartilage is an excellent graft material for esthetic and functional reconstruction of mild to moderate saddle nose deformity.
Cartilage* ; Congenital Abnormalities* ; Ear Cartilage ; Humans ; Nose* ; Transplants*

PURPOSE: Correction of saddle nose remains problematic both in the technique of reconstruction and in the choice of implant material for nasal augmentation. A large variety of graft materials have been used for the reconstruction of the saddle nose deformity. The purpose of this study is to determinate an algorithm for deciding alternative graft materials used in correction of saddle nose deformity. METHODS: Six patients with saddle nose who were corrected using by auricular cartilage and costal cartilage at Chosun university hospital were analyzed. RESULTS: After a mean interval of 12 months, all patients were satisfied with the esthetic and functional result. CONCLUSION: Auricular cartilage is an excellent graft material for esthetic and functional reconstruction of mild to moderate saddle nose deformity.
Cartilage* ; Congenital Abnormalities* ; Ear Cartilage ; Humans ; Nose* ; Transplants*

PURPOSE: There are many methods for the reconstruction of the facial defect after an excision of a skin cancer; such as skin graft, local flap, free flap, etc... Skin graft has its' limitations; it could remain in different color with in regards of the recipient to donor, with an unfavorable scar. Free flap can lead to big donor site morbidity with long operation time and uncontrolled scar as a disadvantage factor. Compared to the prior, local flap offers several merits; sufficient blood supply, good tissue quality and short operation time. We revised 'V-Y-S flap' for the facial defect, which proved to have favorable outcomes. METHODS: Total 7 V-Y-S flaps were performed to patients with skin cancers(six squamous cell carcinoma and one basal cell carcinoma). Two of these flaps were combined with composite grafts, one with full thickness skin graft. Six patients were female and one male. The average diameter of defects after excision was 2.3cm. The follow-up period was 18 months maximally. RESULTS: We treated seven facial skin cancers with 'V-Y-S flap'. There were no flap necrosis, cancer recurrence and scar contracture as a result. Furthermore, this method also offers a favorable central scar line that is parallel to the nasolabial fold and the nasojugal groove, especially in the nasolabial area and superomedial side of the cheek. With this method, we could cover a maximum diameter of 4cm facial defect. CONCLUSION: In conclusion, it is suggested that V-Y- S flap is a useful mehtod to cover facial defects after the excision of a skin cancer.
Carcinoma, Squamous Cell ; Cheek ; Cicatrix ; Contracture ; Female ; Follow-Up Studies ; Free Tissue Flaps ; Humans ; Male ; Nasolabial Fold ; Necrosis ; Recurrence ; Skin Neoplasms* ; Skin* ; Tissue Donors ; Transplants