Novel Ferritin Light Chain Gene Mutation in a Korean Patient with Neuroferritinopathy

No abstract available.

Erratum to: Ataxia with Oculomotor Apraxia Type 1 without Oculomotor Apraxia: A Case Report

Unfortunately, the original version of this article contained an error in the nomenclature of a variant which was shown in an electropherogram in the Figure 1.

Presynaptic Dopaminergic Degeneration in a Patient with Beta-Propeller Protein-Associated Neurodegeneration Documented by Dopamine Transporter Positron Emission Tomography Images: A Case Report

No abstract available.

Familiar Hyperekplexia, a Potential Cause of Cautious Gait: A New Korean Case and a Systematic Review of Phenotypes

Familial hyperekplexia, also called startle disease, is a rare neurological disorder characterized by excessive startle responses to noise or touch. It can be associated with serious injury from frequent falls, apnea spells, and aspiration pneumonia. Familial hyperekplexia has a heterogeneous genetic background with several identified causative genes; it demonstrates both dominant and recessive inheritance in the α1 subunit of the glycine receptor (GLRA1), the β subunit of the glycine receptor and the presynaptic sodium and chloride-dependent glycine transporter 2 genes. Clonazepam is an effective medical treatment for hyperekplexia. Here, we report genetically confirmed familial hyperekplexia patients presenting early adult cautious gait. Additionally, we review clinical features, mode of inheritance, ethnicity and the types and locations of mutations of previously reported hyperekplexia cases with a GLRA1 gene mutation.

Ataxia with Oculomotor Apraxia Type 1 without Oculomotor Apraxia: A Case Report

No abstract available.

Effects of Auricular Acupressure on Menstrual Pain, Difficulties in Daily Life, Negative Feelings and Autonomic Nervous Responses in Female College Students

PURPOSE: The purpose of this study was to determine the effects of auricular acupressure on menstrual pain, difficulties in daily life, negative feelings and autonomic nervous responses among college students. METHODS: A Randomized Controlled Trial design was used. The treatment group A (n=12) receivedauricular acupressure therapy on the first or second day of their menstrual period. Treatment group B (n=18) regularly received an auricular acupressure therapy once a week for a month. The control group (n=19) received no auricular acupressure therapy. An independent t-test was used to examine pre-post test differences in the group. The ANOVA and Scheffe test were used to examine pre-post test differences among the group. RESULTS: Subjects in treatment group A showed significantly less menstrual pain, difficulties in daily life, and negative feelings than the control group did. The participants in treatment group B also showed significantly less difficulties in daily life and negative feelings than the control group. CONCLUSION: The findings support that auricular acupressure therapy on menstrual periods is effective in controlling menstrual pain, difficulties in daily life, and negative feelings. As the method is simple, it would be useful for female students to learn to use this method to alleviate the symptoms related to menstruation through self care.

Photoelastic stress analysis of implants according to fixture design / 대한치과보철학회지

PURPOSE: The purpose of this study was to evaluate the pattern and the magnitude of stress distribution in the supporting tissues surrounding three different types of implants(ITI, 3i, and Bicon implant system). MATERIAL AND METHOD: Photoelastic models were made with PL-2 resin(Measurements Group, Raleigh, USA) and three implants of each kind were placed in the mandibular posterior edentulous area distal to the canine . For non-splinted restorations, individual crowns were fabricated on three titanium abutments. For splinted restorations, 3-unit fixed partial dentures were fabricated. Photoelastic stress analyses were carried out to measure the fringe order around the implant supporting structure under simulated loaded conditions(15 lb, 30 lb). CONCLUSION: The results were as follows; 1. Regardless of the implant design, stresses were increased in the apex region of loaded implant when non-splinted restorations were loaded. While relatively even stress distribution occurred with splinted restorations. Splinting was effective in the second implant. 2. Strain around Bicon implant were lower than those of other implants, which confirmed the splinting effect. The higher the load, the more the stress occurred in supporting tissue, which was most obvious in the Bicon system. 3. Stress distribution in the supporting tissue was favorable in the ITI system, while the other side of 3i system tended to concentrate the stress in some parts.

Photoelastic stress analysis of implants according to fixture design / 대한치과보철학회지

PURPOSE: The purpose of this study was to evaluate the pattern and the magnitude of stress distribution in the supporting tissues surrounding three different types of implants(ITI, 3i, and Bicon implant system). MATERIAL AND METHOD: Photoelastic models were made with PL-2 resin(Measurements Group, Raleigh, USA) and three implants of each kind were placed in the mandibular posterior edentulous area distal to the canine . For non-splinted restorations, individual crowns were fabricated on three titanium abutments. For splinted restorations, 3-unit fixed partial dentures were fabricated. Photoelastic stress analyses were carried out to measure the fringe order around the implant supporting structure under simulated loaded conditions(15 lb, 30 lb). CONCLUSION: The results were as follows; 1. Regardless of the implant design, stresses were increased in the apex region of loaded implant when non-splinted restorations were loaded. While relatively even stress distribution occurred with splinted restorations. Splinting was effective in the second implant. 2. Strain around Bicon implant were lower than those of other implants, which confirmed the splinting effect. The higher the load, the more the stress occurred in supporting tissue, which was most obvious in the Bicon system. 3. Stress distribution in the supporting tissue was favorable in the ITI system, while the other side of 3i system tended to concentrate the stress in some parts.

Photoelastic stress analysis of implant supported fixed prostheses with different placement configurations in mandibular posterior region / 대한치과보철학회지

STATEMENT OF PROBLEM: More than 70% of patients who need the implant supported restoration are parially edentulous. The principles of design for implant supported fixed partial denture in mandibular posterior region are many and varied. Jurisdiction for their use is usually based on clinical evaluation. There are several areas of interest regarding the design of implant supported fixed partial denture in mandibular posterior region. 1) Straight and tripod configuration in implant placement, 2) Two restoration types such as individualized and splinted restorations. PURPOSE: The purpose of this study was to compare the amount and distribution of stress around the implant fixtures placed in the mandibular posterior region with two different arrangements and to evaluate the effects of splinting using the photoelastic stress analysis. MATERIALS AND METHODS: 1) Production of study model: Mandibular partially edentulous model was waxed-up and duplicated with silicone and two models were poured in stone. 2) Fixture installation and photoelastic model construction: Using surveyor(Ney, USA), 3 fixtures(two 4.0x13 mm, one 5.0x10 mm, Lifecore, USA) were installed in straight and tripod configurations. Silicone molds were made and poured in photoelastic resin (PL-2. Measurements group, USA). 3) Prostheses construction: Four 3-unit bridges (Type III gold alloy, Dongmyung co., Korea) were produced with nonhexed and hexed UCLA abutments and fitted with conventional methods. The abutments were tightened with 30 Ncm torque and the static loads were applied at 12 points of the occlusal surface. 4) Photoelastic stress analysis: The polarizer analyzer system with digital camera(S-2 Pro, Fujifilm, Japan) was used to take the photoelastic fringes and analysed using computer analysis program. RESULTS: Solitary hexed UCLA restoration developed different stress patterns between two implant arrangement configurations, but there were no stress transfer to adjacent implants from the loaded implant in both configurations. However splinted restorations showed lesser amount of stresses in the loaded implants and showed stress transfer to adjacent implants in both configurations. Solitary hexed UCLA restoration with tripod configuration developed higher stresses in anterior and middle implants under loading than implants with straight configurations. Splintied 3 unit fixed partial dentures with tripod configuration showed higher stress development in posterior implant under loading but there were no obvious differences between two configurations. CONCLUSIONS: The tripod configuration of implant arrangement didn't show any advantages over the straight configuration. Splinting of 3 unit bridges with nonhexed UCLA abutments showed less stress development around the fixtures. Solitary hexed UCLA restoration developed tilting of implant fixture under offset loads.

A photoelastic stress analysis of fixed partial dentures with bicon implants on mandibular posterior area / 대한치과보철학회지

STATEMENT OF PROBLEM: Several prosthetic options are available for the restoration of multiple adjacent implants. A passively fitting prosthesis has been considered a prerequisite for the success and maintenance of osseointegration. Passivity is a particular concern with multiple implants because of documented inaccuracies in the casting and soldering process. One way to avoid this problem is to restore the implants individually, however, the restorations of individual adjacent impants requires careful adjustment of interproximal contacts. PURPOSE: The purpose of this study was to compare the stress distribution pattern and amount surrounding Bicon implants with individual crowns and splinted restorations. MATERIAL AND METHOD: A photoelastic model of a human partially edentulous left mandible with 3 Bicon implants(4*1 mm) was fabricated. For non-splinted restorations, individual crowns were fabricated on 3 abutments (4.0*6.5 mm, 0 degree, 2.0 mm post, Bicon Inc., Boston, USA) After the units were cemented, 4 levels of interproximal contact tightness were evaluated: open, ideal (8 micrometershim stock drags without tearing), medium(40 micrometer), and heavy(80 micrometer). Splinted 3-unit fixed partial dentures were fabricated and cemented to the model. Changes in stress distribution under simulated non-loaded and loaded conditions(7.5, 15, 30 lb) were analyzed with a circular polaricope. RESULTS: 1. Stresses were distributed around the entire body of fin in Bicon implants. 2. Splinted restorations were useful for distribution of stress around implants especially with higher loads. 3. By increasing the contact tightness between the individually restored three implants, the stress increased in the coronal portion of implants. CONCLUSIONS: Ideal adjustment of the contact tightness was important to reduce the stresses around individually restored Bicon implants.

A study on the color stability of porcelain repair resins / 대한치과보철학회지

STATEMENT OF PROBLEM: Porcelain restorations are widely used in restorative dentistry with a high degree of general success. However, porcelain is brittle and may fracture intraorally. Sometimes a repair may be attempted using composite resin and bonding system available. Color stability of porcelain repair resins affects esthetics and prognosis of prosthesis, so that provides important criteria for the choice of porcelain repair resins. PURPOSE: The purpose of this study was to investigate the color stability of composite resins used widely as porcelain repair system. MATERIALS AND METHOD: Composite resins used for this study were Carisma(Kulzer, Germany), Tetric ceram(Ivoclar, Liechtenstein), Filtek Z250(3M, USA), and Arabesk Top(VOCO, Germany). Thirty disc-shaped specimens(10x2mm) were fabricated from each composite resin. Color changes of specimens after treatment using thermocycling system(KD-TCS30, Kwang-duk F.A. Korea) and after immersion in methylene blue(0.05% by Wt) were measured with colorimeter(Model Tc- 6Fx, Tokyo Denshoku Co.) and obtained data were analyzed. RESULTS AND CONCLUSION: The results obtained from this study were as follows. 1. The color change of Filtek Z250 was lesser than those of Tetric ceram and Arabesk Top after thermocycling (12000 times). 2. All of the composite resins in this study showed increase of color change according to increase of thermocycling frequency. 3. After treatment with methylene blue, the color change of Arabesk Top was greater than those of Carisma and Tetric ceram, and Tetric ceram was more stable than others.

The relation between psychosocial factor of inorganic chest pain and neurotic symptoms

BACKGROUND: Compared to Europe and America neurotic chest pain patients seems to be much more prevalent in Korea. This study was designed to depict various neurotic symptoms of patients with inorganic chest pain. METHOD: In the course of one year(from March, 1997 to March, 1998), 70 subjects were selected among the people who visited the outpatient clinic of department of family medicine with symptom of chest pain. The control group was selected from a healthy population which matched nearly the same number as the chest pain group. Patients were tested by EKG, treadmill, chest X-ray, 2D-UCG and requested to answer SCL-MPD questionnaire. Statistical analysis by means of SPCC/PC+ and for significance using non-parametric Mann-Whitney U test was done. RESULTS: The chest pain group scored significantly higher than the control group in obsessive and compulsive, anger-hostility, depression, anxiety, and somatization scale. male chest pain group scored higher in somatization, anxiety, obsessive-compulsive, hypochondriasis, and depression scale. The female chest pain group scored higher in depression scale. CONCLUSION: Many inorganic chest pain patients complain through various neurotic symptoms. When approaching chest pain patients we should consider the possibility of a psychosocial cause.