No abstract available.
Fees, Medical* ; Korea*

No abstract available.
Fertilization in Vitro* ; Fertilization* ; Humans*

OBJECTIVE: The aim of our study was to make a practical comparative evaluation of the first and second trimesters in order to determine the period during which a higher yield of fetal nucleated red blood cells (FNRBCs) can be obtained. METHODS: NRBCs were isolated from maternal blood during the first and second trimesters of pregnancy using double Percoll gradients with different osmolarities. Magnetic activated cell sorting was performed with Kleihauer-Betke stain. We isolated fetal NRBCs from 10 mL of samples of maternal blood and determined fetal sex and fetal aneuploidy by fluorescence in situ hybridization (FISH). RESULTS: The average number of NRBCs was 9.85 in samples obtained during the first trimester and 14.88 in samples obtained during the second trimester (P=0.07). The average number of NRBCs with Y chromosome signals was 5.73 in the first trimester and 8.22 in second trimester (P=0.56). However, the percentage of NRBCs with Y chromosome signals in the first trimester (70.6%) was significantly higher than in the second trimester (59.8%) (P=0.049). We diagnosed the blood samples from 7 pregnant women having fetal aneuploidy using this method and the number of NRBCs was 18.4. CONCLUSION: The method using Percoll osmolarity and a double density gradient system may be a very useful method for separation of NRBCs in the first trimester of pregnancy and also in the second trimester.
Aneuploidy ; Centrifugation, Density Gradient ; Erythrocytes ; Female ; Fluorescence ; Humans ; In Situ Hybridization ; Magnetics ; Magnets ; Osmolar Concentration ; Povidone ; Pregnancy ; Pregnancy Trimester, First ; Pregnancy Trimester, Second ; Pregnant Women ; Prenatal Diagnosis ; Silicon Dioxide ; Y Chromosome

PURPOSE: This study assessed marginal bone remodeling and soft tissue esthetics after the loading of single bone-level implants in the anterior maxilla. METHODS: An open, single-arm observational clinical trial with 3 years of follow-up was performed, including 22 implants. The patients presented with a single tooth gap in the anterior maxilla (tooth positions 14–24), with natural or restored adjacent teeth. An implant was placed at least 8 weeks post-extraction and healed submerged for 6 weeks. After the second-stage operation, a fixed provisional prosthesis was provided. The final restoration was placed 6 months after the provisional restoration. The time of the provisional crown connection was considered to be the baseline in this study. Esthetic parameters and the marginal bone level were assessed at 6, 12, 24, and 36 months. RESULTS: All implants were well integrated in the bone. A statistically significant increase was found in the mean implant stability quotient between the time of the provisional prosthesis and the time of the final prosthesis. Most implants (95.5%) revealed marginal bone resorption (<0.5 mm), and just 1 implant (4.5%) showed a change of 2.12 mm from baseline to 36 months (mean 0.07±0.48 mm), while the crestal bone level decreased significantly, from 2.34±0.93 mm at baseline to 1.70±1.10 mm at 36 months. The facial gingival margin and papilla were stable and the esthetic scores indicated high patient and dentist satisfaction. CONCLUSIONS: Platform-switching bone-level implants placed in maxillary single-tooth gaps resulted in successful osseointegration with minimal marginal bone resorption. The peri-implant soft tissue was also esthetically satisfying and stable.
Alveolar Bone Loss ; Bone Remodeling ; Bone Resorption ; Crowns ; Dental Implants ; Dentists ; Esthetics ; Follow-Up Studies ; Humans ; Maxilla* ; Observational Study* ; Osseointegration ; Prostheses and Implants ; Tooth

OBJECTIVE: The purpose of this study was to determine whether intracytoplasmic sperm injection(ICSI) could overcome the defects of oocytes in IVF-ET patients with previous fertilization failure by conventional fertilization technique. Design: Retrospective study Materials and METHODS: A total of 119 ICSI cycles in 57 IVF-ET patients performed from May, 1995 to December, 1997 was enrolled. Subjects were divided into two groups: FR group included 66 ICSI cycles in 35 patients with normal sperm who underwent ICSI due to past history of failed or poor fertilization in the previous IVF-ET cycles, and OAT group included 53 ICSI cycles in 22 patients with severe oligoasthenoterato- zoospermia(OAT) which was defined as sperm concentration < 20 million/ml, mo#dlity < 30% and normal morphology < 4% by strict morphologic criteria. The outcomes of ICSI were analyzed and compared in both groups. RESULTS: The age of female patients, basal serum FSH level, and the numbers of oocytes retrieved and metaphase II oocytes were all comparable in both groups. The fertilization rate after ICSI was similar in both groups(68.7+/-25.3% vs. 67.7+/-24.5%), as were the cleavage rate of normally fertilized oocytes(93.1+/-21.4% vs. 89.3+/-21.6%), the number of embryos transferred(4,00+/-1.98 vs. 4.64+/-2.10), and cumulative embryo score(CES) indicating the quality of embryos(47.3+/-33.2 vs. 54.1+/-33.2). The implantation rate(4.3+/-10.5% vs. 3.8+/-11.0%) and the clinical pregnancy rate per cycle(15.2% vs. 13.2%) were also comparable in both groups. CONCLUSIONS: Although it has been shown that there is a higher risk of chromosomal abnormalities in oocytes from IVF-ET patients with pevious failed or poor fertilization, higher implantation and clinical pregnancy rates wer#e not observed in patients with OAT following ICSL Therefore, the functional defect of sperm such as loss of capacitation, defect of aaasome reaction, and abnormality of nucleus decondensation should be also considered in patients with previous failed or poor fertilization.
Avena ; Chromosome Aberrations ; Embryonic Structures ; Female ; Fertilization* ; Humans ; Male* ; Metaphase ; Oocytes ; Pregnancy Rate ; Retrospective Studies ; Sperm Injections, Intracytoplasmic ; Spermatozoa*

No abstract available.
Chromosome Aberrations* ; Embryonic Structures* ; Humans ; Male* ; Preimplantation Diagnosis* ; Sperm Injections, Intracytoplasmic*

BACKGROUND In contrast to defects of the mandible and mouth floor region, in the defect of maxilla, the availability of firmly attached oral and nasal mucosal linings is needed. In addition to it, in consider of operation field, operating convenience, and esthetics, reconstruction using prelaminated flap is strongly recommended. Therefore we consider the prelaminated flap through the cases that is reconstructed using prelaminated forearm flap and prelaminated scapular flap. PATIENTS AND METHODS From 2001 to 2008, in OMFS SNUDH, there were 6 cases that had reconstruction using prelaminated forearm free flap and other 3 cases that had reconstruction using prelaminated scapular flap of maxilla. The average age of patients that were reconstructed using prelaminated forearm free flap was 47.5 years, the average prelaminated period (after 1st operation ~ until 2nd operation) was 51.8 days and the average follow-up period after 2nd operation was 35.3 months. As well, the average age of patients that were reconstructed using prelaminated scapular free flap was 37 years, the average prelaminated period (after 1st operation ~ until 2nd operation) was 57 days and the average follow-up period after 2nd operation was 42.3 months. RESULTS Except 1 case that were reconstructed using prelaminated scapular flap, we could get firmly attached oral and nasal stable skin(mucosal like) lining, more adequate thickness flap than any other flap and improved esthetic and functional results in the other 8 cases that were reconstructed using prelaminated flap. The complications of the prelaminated forearm flap cases were inconvenient swallowing, sputum, limitation of mouth opening and difficult mastication. It came from flap shrinkage of the flap in some aspect, as well as other combined operations such as mass resection or RND. The difficult point of the reconstruction of prelaminated scapular flap was the possibility of vascular damage at preparation of flap in 2nd surgery. The damage could cause the failure of the prelaminated scapular flap. And the skin-lining of the prelaminated flap had limitations, so it is needed to study about the cultured oral epithelium-lining flap instead of the skin-lining flap. CONCLUSION We considered about advantages, complications and notable things of prelaminated flap through maxillary reconstruction cases using prelaminated forearm flap and prelaminated scapular flap so far. Furthermore, we should go on studying for functional reconstruction of prelaminated fasciomucosal flap using cultured oral epithelium.
Deglutition ; Epithelium ; Esthetics ; Follow-Up Studies ; Forearm ; Free Tissue Flaps ; Humans ; Mandible ; Mastication ; Maxilla ; Mouth ; Mouth Floor ; Porphyrins ; Sputum

BACKGROUND In contrast to defects of the mandible and mouth floor region, in the defect of maxilla, the availability of firmly attached oral and nasal mucosal linings is needed. In addition to it, in consider of operation field, operating convenience, and esthetics, reconstruction using prelaminated flap is strongly recommended. Therefore we consider the prelaminated flap through the cases that is reconstructed using prelaminated forearm flap and prelaminated scapular flap. PATIENTS AND METHODS From 2001 to 2008, in OMFS SNUDH, there were 6 cases that had reconstruction using prelaminated forearm free flap and other 3 cases that had reconstruction using prelaminated scapular flap of maxilla. The average age of patients that were reconstructed using prelaminated forearm free flap was 47.5 years, the average prelaminated period (after 1st operation ~ until 2nd operation) was 51.8 days and the average follow-up period after 2nd operation was 35.3 months. As well, the average age of patients that were reconstructed using prelaminated scapular free flap was 37 years, the average prelaminated period (after 1st operation ~ until 2nd operation) was 57 days and the average follow-up period after 2nd operation was 42.3 months. RESULTS Except 1 case that were reconstructed using prelaminated scapular flap, we could get firmly attached oral and nasal stable skin(mucosal like) lining, more adequate thickness flap than any other flap and improved esthetic and functional results in the other 8 cases that were reconstructed using prelaminated flap. The complications of the prelaminated forearm flap cases were inconvenient swallowing, sputum, limitation of mouth opening and difficult mastication. It came from flap shrinkage of the flap in some aspect, as well as other combined operations such as mass resection or RND. The difficult point of the reconstruction of prelaminated scapular flap was the possibility of vascular damage at preparation of flap in 2nd surgery. The damage could cause the failure of the prelaminated scapular flap. And the skin-lining of the prelaminated flap had limitations, so it is needed to study about the cultured oral epithelium-lining flap instead of the skin-lining flap. CONCLUSION We considered about advantages, complications and notable things of prelaminated flap through maxillary reconstruction cases using prelaminated forearm flap and prelaminated scapular flap so far. Furthermore, we should go on studying for functional reconstruction of prelaminated fasciomucosal flap using cultured oral epithelium.
Deglutition ; Epithelium ; Esthetics ; Follow-Up Studies ; Forearm ; Free Tissue Flaps ; Humans ; Mandible ; Mastication ; Maxilla ; Mouth ; Mouth Floor ; Porphyrins ; Sputum

OBJECTIVES : Administration methods of antibiotics implements a variety for indications and diseases. Therefore, it is impossible to produce a single guideline. Many antibiotics have been prescribed without specific index, by practicians for a long period of time. In general dental practice and oral and maxillofacial surgical practice, there is not a guidelines for antibiotics. Therefore, there is a dependency on pre-existent methods rather than following an exact guideline. Consequently, a controversy was issued that prescription of antibiotics tend to be misused or abused. And it is also direct relation to the tolerance of antibiotics as well. Moving forward, in this review we will be analyzing the exact usage and indication of antibiotics in dental treatment. MATERIALS AND METHODS : 29 published articles of both domestic and international were researched through Pubmed and Kormed, and the review from these articles were performed accordingly. We examined the administration of antibiotics through the objective usage, that classified prophylactic and therapeutic. RESULTS : For therapeutic usage, empirical prescription is mandatory for the first step. Next is to moderate the empirical prescription depending upon the result of its culture. Administration of antibiotics must be kept for 2days after the symptoms disappear. For a prophylactic use, we can generally pr escribe antibiotics to prevent local infection or systemic infection. Although the method of prescription and neccessity of antibiotics to prevent local in fection are controversial, exact guidelines of antibiotics to prevent systemic infection are established by AHA. CONCLUSION : Most crucial concept for prescript antibiotics is to determine if it is adequately suitable for all circumstances. In this decision making, a guideline for prescription of antibiotics in various dental surgical practice is necessary. This guideline can reduce the misusage and disusage of a ntibiotics in general dental practices and oral and maxillofacial surgical practices.
Anti-Bacterial Agents ; Decision Making ; Dependency (Psychology) ; Prescriptions ; Resin Cements

OBJECTIVE: To assess the maternal circulating levels of homocysteine, the thiobarbituric acid reactive substances (TBARS) and the glutathione peroxidase (GPX) activities, and to determine whether or not these markers have any effect on the neonatal birth weight in preeclamptic patients. METHODS: A case control study of 74 normal pregnant women and 47 preeclamptic patients who were hospitalized for delivery and had singleton live births between 2000 and 2002 was conducted. The birth weight, gestational age, and maternal circulating level of homocysteine, the TBARS, the GPX activities, and the antioxidant capacity (GPX/TBARS) were measured. GPX genotyping was done with the maternal DNA samples. The results were analyzed with a Chi-square test, student T-test, and logistic regression analyses. RESULTS: The homocysteine and TBARS levels were significantly higher in the preeclamptic patients than in the pregnant controls (p=0.0098 for homocysteine, p<0.0001 for TBARS). The antioxidant capacity (GPX/TBARS) was significantly lower in the preeclamptic patients than in the pregnant controls (p<0.0001). There were no statistically significant differences in the homocysteine level, the TBARS levels, the GPX activity, the gestational age, and birth weight between the wild type of GPX polymorphism and the variant type of GPX polymorphism (p>0.05). After controlling for the covariates, homocysteine reduced the gestational age (p=0.0035) and reduced the birth weight by 27 g (p=0.0259). CONCLUSION: The levels of the oxidative stress markers (homocysteine and TBARS) are higher and the antioxidant capacity (GPX/TBARS) is lower in preeclampsia patients. Homocysteine significantly reduces the fetal growth rate.
Birth Weight* ; Case-Control Studies ; DNA ; Female ; Fetal Development ; Gestational Age ; Glutathione Peroxidase ; Homocysteine ; Humans ; Live Birth ; Logistic Models ; Oxidative Stress* ; Parturition* ; Pre-Eclampsia ; Pregnant Women ; Thiobarbituric Acid Reactive Substances