PURPOSE: The aim of this study was to evaluate the effect of dimensional stability of splinting material on the accuracy of master casts. MATERIALS AND METHODS: A stainless steel metal model with 6 implants embedded was used as a master model. Implant level impressions were made after square impression copings were splinted using 5 different techniques as follows. (1) Splinted with autopolymerizing resin and sectioned, reconnected to compensate polymerization shrinkage before the impression procedure. (2) Splinted with autopolymerizing resin just before impression procedure. (3) Primary impression made with impression plaster and secondary impression were made over with polyether impression material. (4) Splinted with impression plaster. (5) Splinted with VPS bite registration material. From master model, 5 impressions and 5 experimental casts, total 25 casts were made for each of 5 splinting methods. The distortion values of each splinting methods were measured using coordinate measuring machine, capable of recordings in the x-, y-, z-axes. A one-way analysis of variance (ANOVA) at a confidence level of 95% was used to evaluate the data and Tukey's studentized range test was used to determine significant differences between the groups. RESULTS: Group 1 showed best accuracy followed by Group 3 & 4. Group 2 and 5 showed relatively larger distortion value than other groups. No significant difference was found between group 3, 4, 5 in x-axis, group 2, 3, 4 in y-axis and group 1, 3, 4, 5 in z-axis (P<.0001). CONCLUSION: Both Splinting impression copings with autopolymerizing resin following compensation of polymerization shrinkage and splinting method with impression plaster can enhance the accuracy of master cast and impression plaster can be used simple and effective splinting material for implant impression procedure.
Compensation and Redress ; Humans ; Jaw Relation Record ; Polymerization ; Polymers ; Splints ; Stainless Steel

A large mass as a sign of an infection is rare, and it might convince a physician that it had the appearance of a malignancy. The patient in this case visited our clinics after attending several hospitals, with a mass that had the appearance of a malignancy, based on the severe destructive findings observed on plain radiographs. We report the first documented case of a patient with a large mass (12×7×20 cm) and a low-grade infection, which developed at the proximal thigh after a hip arthroplasty. It is important to realize that an infection accompanied by a large mass, can mimic a highly destructive malignant lesion on plain radiographs.
Arthroplasty* ; Hip* ; Humans ; Thigh*

By light and scanning electron microscopy, the morphologies of Korean pubic louse(Phthirus pubis) were described and measured. Especially, electron microscopic structures of palpus, tuft organ, sensilla basiconicum and palpal lobe were reviewed in detail. The variations were obserbed in the number of dorsal setae and the setae of membranous processes of abdomen. And also, the importance of public health and epidemiological aspects was discussed.
Abdomen ; Microscopy, Electron, Scanning* ; Phthiraptera* ; Phthirus* ; Public Health ; Sensilla

No abstract available.
Cerebrospinal Fluid* ; Child* ; Humans ; Lactic Acid*

Osseous union of congenital pseudarthrosis of the tibia remains today a formidable challenge to orthopedic surgeons. Recently clinlcal studies of nonunion, congenital pseudarthrosis, and fresh fracture suggest that the electical stimulation enhances the union rate and shortens the healing time. We treated a case of congenital pseudarthrosis of the tibia by combined Boyds dual onlay graft and direct current electrical stimulation. A flrm clinical and radiological union was obtained at four months posfoperatively.
Electric Stimulation ; Inlays ; Orthopedics ; Pseudarthrosis ; Surgeons ; Tibia ; Transplants

Anetoderma is loose and wrinkled skin lesions that show the characteristic histopathological feature of focal loss of elastic fibers in the dermis. The primary type of anetoderma arises in clinically normal skin and the secondary type replaces the lesions of associated disorders including various infections, infiammatory diseases and tumors. However, anetoderma due to pilomatricoma is very rare. Our patient, a 21-year-old female, presented with a soft and wrinkled skin overlying a firm, pedunculated tumor on her left upper arm. The histopathological examination showed anetodermic cutaneous changes which were associated with the underlying pilomatricoma.
Anetoderma* ; Arm ; Dermis ; Elastic Tissue ; Female ; Humans ; Pilomatrixoma* ; Skin ; Young Adult

No abstract available.
Kinetics* ; Wrist*

After the introduction of the central parenchymal pedicle by Hester(1985) and the round-block technique by Benelli (1988), several variations of periareolar reduction mammoplasty have been used by many authors. Periareolar reduction mammoplasty is a less aggressive procedure than traditional techniques and it produces less conspicuous periareolar scars while maintaining an acceptable overall result. We experienced 120 cases (60 patients) of periareolar reduction mammoplasty during the period from May 1994 to February 1998. We present the analysis of 60 cases of periareolar reduction mammoplasty. Periareolar reduction mammoplasty utilizing central parenchymal pedicle was performed in the first 40 patients, while a procedure utilizing the inferior dermal pedicle was done in the next 20 cases consecutively. The range of follow-up was from 1 to 5 years. Complications such as nipple areolar complex necrosis and sensory changes were reduced when the inferior dermal pedicle used. There were 5 cases of nipple areolar complex necrosis and sensory changes were reduced when the inferior dermal pedicle used. There were 5 cases of nipple areolar complex necrosis (6.2%), including 1 case of near total necrosis in cases utilizing the central parenchymal pedicle. But in the technique using inferior dermal pedicle, there was no skin flap necrosis. The central parenchymal pedicle technique has several advantages such as a wide operation field permitting complete breast contouring and better mobility of the remaining breast tissue. However, inferior dermal pedicle technique has relative superiority over central parenchymal pedicle technique in terms of anatomical rationale, as well as in the rate of complications without causing limitations in breast mobility for contouring. Such complications as nipple areolar complex necrosis, skin flap necrosis and sensory change of nipple were reduced when the inferior dermal pedicle technique was used. It is much easier to preserve the 4th intercostal nerve to the nipple anatomically. Periareolar reduction mammoplasty utilizing the inferior dermal pedicle is thought to be a reliable, reproducible method.
Breast ; Cicatrix ; Female ; Follow-Up Studies ; Humans ; Intercostal Nerves ; Mammaplasty* ; Necrosis ; Nipples ; Skin

No abstract available.
Hyperplasia* ; Islets of Langerhans* ; Nesidioblastosis*

We report a case of congenital vellus hamartoma, which consists of numerous matured vellus hair follicles and sebaceous glands. This patient is 4-month-old male with multiple, variable sized nodules on the right epicanthsl fold area since birth. Histopathologically, some of the infundibular portion of the vellus hair shows irregular and reticulated hyperplasia. There are numerous well-formed vellus hair follicles surrounded with thick fibrous sheath and some of them are associated with rudiment sebaceous glands.
Hair ; Hair Follicle ; Hamartoma* ; Humans ; Hyperplasia ; Infant ; Male ; Parturition ; Sebaceous Glands