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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY
Journal Basic Information
Journal DOI :
Korean Academy of Pediatric Dentistry
Editor in Chief :
Volume & Issues
Volume 25, Issue 4 - Nov 1998
Volume 25, Issue 3 - Aug 1998
Volume 25, Issue 2 - May 1998
Volume 25, Issue 1 - Feb 1998
Selecting the target year
CORRELATIONS BETWEEN HIPPOCAMPAL THETA RHYTHM AND INTRACELLULAR CHARACTERISTICS OF PYRAMIDAL NEURONS
Kwon, Oh-Heung ; Kim, Young-Jin ; Nam, Soon-Hyeun ; Kim, Hyeun-Jung ; Lee, Man-Gee ; Cho, Jin-Hwa ; Choi, Byung-Ju ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 25, issue 4, 1998, Pages 671~682
Electrophysiological phenomena of pyramidal cells in the CA1 area of the dorsal hippocampus were recorded from and filled with neurobiotin in anesthetized rats. The electropharmacological properties of membrane as well as the cellular-synaptic generation of rhythmic slow activity (theta) were examined. The intracellular response characteristics of these pyramidal cells were distinctly different from responses of interneurons. Pyramidal cells had a high resting membrane potential, a low input resistance, and a large amplitude action potential. A afterhyperpolarization was followed a single action potential. Most of pyramidal cells did not display a spontaneous firing. Pyramidal cells displayed weak inward rectification and anodal break excitation. The slope of the frequency-current relation was 53.4 Hz/nA for the first interspike interval and 15.9 Hz/nA for the last intervals, suggesting the presence of spike frequency adaptation. Neurobiotin-filled neurons showed pyramidal morphology. Cells were generally bipolar dendritc processes ramifying in stratum lacunosum-moleculare, radiatum, and oriens. Commissural stimulation discharged pyramidal cells, followed by excitatory and inhibitory postsynaptic potentials (EPSPs and IPSPs). The frequency of theta-related membrane potential oscillation was voltage-independent in pyramidal neurons. At strong depolarization levels (less than 30 mV) pyramidal cells emitted sodium spike oscillation, phase-locked to theta. The observations provide direct evidence that theta-related rhythmic hyperpolarization of principal cells is brought by the rhythmically discharging interneurons. Furthermore, the findings in which interneurons were also paced by rhythmic inhibitory postsynaptic potentials during theta suggest that they were periodically hyperpolarized by their GABAergic septal afferents.
THE RELIABILITY OF LASER DOPPLER FLOWMETER IN PULP VITALITY TEST OF TEETH
Nam, Dong-Woo ; Kim, Young-Jin ; Nam, Soon-Hyeun ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 25, issue 4, 1998, Pages 683~690
The purpose of this study was to evaluate the reliablity of laser Doppler flowmeter on the permanent maxillary central incisors with open apex. Laser Doppler flowmeter and electric pulp tests were done in 35 elementary students aged between 8 and 9 years and 35 females and males aged between 23 and 24 years. Teeth with open apex were confined to root developmental stage 5 and 6 by Moorrees classification. The threshold of electric pulp tests was decided the time of tingling sensation. More than three different electric pulp tests applied on every teeth with more than 3 minutes interval between each teeth due to the false response. Laser Doppler flowmeter test stablilzation and observation stages took more than 5 minutes each LDF values and electric pulp test thresholds were analyzed with student t-test. The results were as follows: 1. The electric pulp test threshold on teeth with immature and mature roots showed 28.4% and 100% response respectively, and the the LDF values on teeth with immature and mature roots showed 100% response. 2. The EPT thresholds on teeth with immature roots were larger than thresholds on teeth with mature roots(p<0.01). 3. No significant differences were found in the LDF values on teeth with immature and mature roots.
BIOCHEMICAL CHARACTERISTICS OF SALIVA TO BE LINKED TO THE MULTIPLE CARIES IN CHILDREN
Chang, Hee-Soon ; Cho, Woo-Sung ; Choi, Byung-Jai ; Seo, Jeong-Taeg ; Lee, Syng-II ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 25, issue 4, 1998, Pages 691~703
Saliva is obviously potential medium to protect the dental caries by not only physical clearing effect, but aggregating action of protein with bacteria. Nevertheless, we still do not understand how the dental caries occur and what brings the individual difference in caries prevalence. In the regards of dental caries prevalence, we hypothesized that the composition of salivary protein might be different from caries susceptible group to caries resistant group. The purposes of this experiment were focused on the molecular analysis of salivary proteins from the subjects who were involved in multiple caries. Electrophoretic analysis was done on the whole saliva collected from the children with and without multiple caries. We found 86.2% of subjects with multiple caries has approximately 120 KDa protein band while 30.4% in the healthy subjects. And the concentration of the total protein on the subjects with multiple caries is significantly higher than that of the healthy group. However, it turned out that the difference of the salivary composition does not affect the bacterial adhesion to hydroxyapatite bead. With regards of enzymes in saliva, the activity of
and lactate dehydrogenase does not have any significant difference between both groups. However, the concentrations of
in saliva from multiple caries group is higher than that of the control group. Taken all together, it may be concluded that 120 KDa protein in saliva may be associated with the process of dental caries, also the high concentration of protein and
in saliva may be linked to dental caries development as a cofactors.
ESTHETIC TREATMENT OF AMELOGENESIS IMPERFECTA USING RESIN JACKET CROWN: CASE REPORT
Lee, Jun-Haeng ; Lee, Jun-Seok ; Kim, Yong-Kee ; Kim, Jong-Soo ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 25, issue 4, 1998, Pages 704~709
Amelogenesis imperfecta represents a group of hereditary conditions that manifest enamel defects without evidence of generalized or systemic disorders. These enamel disorders are apparently heterogeneous in the basic chemical structure, resulting in a diverse presentation of clinical characteristics. The reported prevalence of amelogenesis imperfecta varies from 1 in 14,000-16,000 to 1.4 in 1,000 depending on specific population studied with the autosomal dominant hypocalcification type of amelogenesis imperfecta believed to be the least prevalent. The most widely accepted current classification system for delineating the amelogenesis imperfecta types considers the mode of inheritance and clinical manifestations. Three major groups are recognized; hypoplastic, hypocalcified, and hypomaturation types. Delineating specific types of amelogenesis imperfecta can be confusing due to the phenotypical similarity of many forms and that the most recent classification lists 14 different types. A 12 year-old female patient came to our pediatric dentistry clinic complaining of the ugly shape and color of her teeth, especially the upper front area. Although the goal of the treatment was mainly focused on the improvement of patient's esthetics, longevity of the restorations was also considered in selecting the appropriate restorative system, resin jacket crown, which can satisfy the both aspects.
THE USE OF DEEP SEDATION FOR THE DENTAL MANAGEMENT OF PEDIATRIC PATIENTS WITH DEFINITELY NEGATIVE BEHAVIOR
Um, Hye-Sook ; Yoon, Hyung-Bae ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 25, issue 4, 1998, Pages 710~716
It is one of difficulties to control children who show definitely negative behavior in dental clinic. In such a case, the pharmacologic management has been used to provide quality care, minimize the extremes of disruptive behavior, promote a positive psychologic response to treatment and patient welfare and safety. Deep sedation can be defined as a controlled, pharmacologically-induced state of depressed consciousness from which the patient is not easily aroused which may be accompanied by a partial loss of protective reflexes. In this retrospective report, the sedation records of 200 pediatric dental patients of ASA Class I & II who were not successfully treated under conscious sedation were used for analysis. Most frequently used regimen of deep sedation was the co-medication of midazolam(0.3mg/kg), enflurane(1.0-2.0 vol%) and 50-70%
. The average age and weight of the patients was 4.6 yr (S.D: 2.72) and 18.7kg(S.D: 6.35) respectively. The average operative time was 52 minutes and midazolam (0.1-0.2cc) was additionally administered intranasally to prolong the operative time as needed. The episodes of untoward side effects were reported during and/or after the procedure in 58 patients. Serious adverse reactions such as cyanosis or laryngospasm were even reported in 7 patients but without mortality. Deep sedation is a very effective way of completing the dental treatments for those who failed to respond well to the conscious sedation. This technique has many practical advantages over general anesthesia case but the demands for the rigid monitoring criteria limit its use in general practice setting. The continuous efforts to improve the safety of the medication and the technique are required for the benefits of the patients and parent.
FINITE ELEMENT ANALYSIS OF STRESS TRANSMITTED TO THE PULPECTOMIZED PRIMARY CENTRAL INCISOR RECONSTRUCTED BY COMPOSITE RESIN CROWN
Maeng, Myung-Ho ; Kim, Yong-Kee ; Kim, Jong-Soo ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 25, issue 4, 1998, Pages 717~730
The Finite Element Analysis has been used for stress analysis of prosthesis, orthodontic or orthopedic appliances and filling materials. The primary purpose of the present studying was to evaluate the effectiveness of needle post in promoting the retention and integrity of composite crown restored on the pulpotomized primary central incisor. Three finite element models-natural tooth (Sample I), composite crown with (Sample II) and without (Sample III) needle post-were constructed and the stress distribution within each model were analyzed and compared one another. The results can be summarized as follows: 1. In sample I, the stress was shown to have distributed uniformly throughout the whole tooth even to the alveolar bone. 2. In sample II, the transmission of stress from the crown to the root area was shown to be very poor and irregular. 3. In sample III, the needle post was proved to be very effective in distributing the stress well to the aveolar bone which might help in maintaining the stability of crown restoration.
THE INFLUENCE OF CURING WITH LIGHT TRANSMITTING WEDGE INSERTED INTO THE COMPOSITE RESIN BODY ON THE DEGREE OF MICROLEAKAGE AND MICROHARDNESS
Suh, Yong-Seok ; Kim, Yong-Kee ; Kim, Jong-Soo ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 25, issue 4, 1998, Pages 731~748
The purpose of this study was to test the hypothesis that the more thorough cure of lightactivated composite resin could be obtained if a new way of delivering the light source deep through the resin body is developed when compared to the conventional bulk cure or incremental cure. Using cylindrical resin blocks and natural teeth, various curing conditions were tested for their effects on the degree of microleakage and microhardness. Data were analyzed statistically using One-Way ANOVA and Scheff's Multiple Range test. The results of the present study were as follows: 1. The increment of reduction in microhardness with depth was shown to be higher in group I and II than in group II and V. 2. At the level of lower inner surface and the bottom surface, significantly lower microhardness values were obtained in group I and II when compared to group III, IV and V. Group IV showed the lowest value among three groups(III, IV, V) representing the only statistically significant difference from group V(p<05). 3. Differences between groups in the degree of microleakage detected were shown to be statistically significant (p<05) with the exception of group IV and V at both occlusal and gingival margins. 4. Based upon the above-mentioned results, commonly cited recommendation of incremental curing is strongly supported and the light-transmitting wedge insertion method can be considered as a effective and feasible clinical procedure for the better curing of composite resin. However, more studies under a variety of conditions should be completed before this method is applied actually to the clinical setting.
A STUDY ON THE EFFECT OF DENTIN WITH VARIOUS PRETREATMENT APPLICATION TIME ON THE DENTIN SURFACE STRUCTURE AND THE BOND STRENGTH OF GLASS IONOMER RESTORATIVE MATERIALS
Lee, Chang-Keun ; Kim, Yong-Kee ; Kim, Jong-Soo ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 25, issue 4, 1998, Pages 749~760
The main purpose of this study was to evaluate the effect of dentin with various pretreatment application time on the dentin surface structure and the bond strength of glass ionomer restorative matrials between primary and permanent tooth. There are difference of composition, structure and pretreated effect of dentin conditioning between the primary and permanent teeth. Inspite of thease fact, we used the same application time of permanent tooth. This study intends to determine the most effective application time using SEM analysis of the surface change by dentin conditioning. Forty five intact primary and permanent teeth were splited mesiodistally with seperating diamond disk. Each eight specimens were prepared for shear bond strength test. (randomely devided eight group as follows:) group I conditioning for five seconds group II conditioning for ten seconds group III conditioning for fifteen seconds group IV conditioning for twenty seconds Additional specimens were prepared to SEM analysis. The result are as follows: 1. Primary teeth are higher shear bond strength in group I and group II. 2. There was no statistically significant difference between primary and permanent teeth in group III and group IV. 3. In SEM analysis, smear layer removal by dentin pretreatment of primary teeth was faster than permanent teeth. Primary teeth may require shorter pretreatment time of dentin for G-I restoration than that of permanent teeth.
THE EFFECT OF
LASER IRRADIATION ON ENAMEL SURFACE AND THE BOND STRENGTH OF SEALANT MATERIAL
Yun, Dong-Sik ; Kim, Yong-Kee ; Kim, Jong-Soo ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 25, issue 4, 1998, Pages 761~771
In this study, attempt has been made to evaluate the effect of
laser irradiation on enamel surface structure and the bond strength of sealant material. Conventional acid etching was used as a control technic for comparison. The results obtained from this experiment were as follows; 1. The highest mean shear bond strength value was observed in samples of Group I (acid-etching) with the statistical significance(p<.05) between all the other groups. 2. The shear bond strength in Group IV was the lowest among laser etching groups. but there were no significant difference between them(p>.05). 3. Scanning electron microscopic observation showed that the rough and irregular surface was created by
laser treatment with the formation of numerous pores, micro-cracks, and small bubble-like inclusion. Increasing the energy density induced localized surface melt with a thin smooth glaze-like appearance. 4. In acid-etched control specimen cohesive failure predominated, whereas adhesive failure was the main mode in laser-treated group. Based upon the above-mentioned results, it can be assumed that the
laser is not an adequate substitute for the acid-etch technique in enamel preconditioning. More studies are required to explore the effective condition of laser irradiation which could attain the better bond strength of restorative materials.
SEDATIVE EFFECT OF INTRANASAL ADMINISTRATION WITH MIDAZOLAM IN SEDATING PEDIATRIC DENTAL PATIENTS
Kang, Dug-Il ; Lee, Sang-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 25, issue 4, 1998, Pages 772~781
The purpose of this study was to assess the sedative effect of intranasal spray with midazolam for management of the uncooperative 20 children aged from 24 months to 92 months who required extensive treatment. The patients were given randomly a dose of 0.2mg/kg of intranasal placebo, intranasal spray with midazolam, and intranasal drop with midazolam. All the children were restrained in a pediwrap and were monitored with pulse oximeter for assessing the pulse rate and peripheral oxygen saturation. According to Fukuta's behavior rating scale, behavior was checked for evaluation of the clinical sedative effect. The obtained results were as follows: 1. Behavior score of intranasal spray with midazolam was lower than intranasal drop with midazolam(P<0.01). 2. Pulse rate was a significant change as a function of dental procedure(P<0.001), however the peripheral oxygen saturation was not influenced significantly by either adiministration route of drug or dental procedure. Clinically, intranasal spray with midazolam were safe and effective sedation in young children undergoing pediatric dental procedures.
CLINICAL STUDY ON THE CONSCIOUS SEDATION WITH MIDAZOLAM INTRANASAL SPRAY
Kim, Hyun-Sik ; Choi, Jung-Lim ; Lee, Chang-Seop ; Lee, Sang-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 25, issue 4, 1998, Pages 782~787
The treatment for pediatric dental patient has become more complex than the previous, because patients of pediatric dentistry, younger than the previous, and they were often combined with systemic disease. And, the importnace of conscious sedation has been increased by this time for this reason. In a variety of CNS depressants, newly developed imidazobenzodiazepine (midazolam) is well known as a safe and effective medicament. It has a rapid onset, minimized cardiovascular depression and various possible administering, route, so it is commonly used for the conscious sedation of pediatric dental patients. Recently, "intranasal drop-in method" draws attention for its safety, but discomfort during administration and posterior dripping through pharynx diminish its popularity. Now more advanced method for intranasal administration is introduced for conscious sedation for pediatric dental patients, it is "intranasal spray" with aerosol form of medicament. With this method, we can achieve some benefits as belows : 1. Diminished discomfort during intranasal spray than nitranasal drop-in. 2. Rapid osnet and reduction than intranasal drop-in. 3. Eliminatin of adverse reaction, such as rhinorrhea. 4. More improved behavior rating scale.
CHANGES OF JAW-OPENING REFLEX DEGREE ACCORDING TO ELECTROACUPUNCTURE DURATION ON ZUSANLI
Seo, Young-Ah ; Song, Hyung-Geun ; Na, Chang-Su ; Lee, Sang-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 25, issue 4, 1998, Pages 788~796
The purpose of this study was to investigate the effect of various electroacupuncture duration induced by acupuncture point-Zusanli (
) electrical stimulation on inhibition of amplitude of digastric electromyogram (dEMG) evoked by noxious electrical stimuli around the mental foramen.
intraperitoneal sodium pentobarbital in an initial dose of 50mg/kg and maintenance doses of 4.5mg/kg/h were given through a cannula in the femoral vein using a constant infusion pump. A pair of stimulating electrodes were inserted for noxious stimuli around the mental foramen. An irritant electronic stimuli pulse (0.2 Hz, 0.1 ms duration) was produced with an intensity of about
times threshold for evoking the dEMG. The anterior belly of the digastric muscle was exposed and a pair of 0.1mm wire electrodes were inserted for dEMG recording. Acupuncture point stimulation on Zusanli (2 Hz, 250
, biphasic pulse, 2 V) was delivered by Dental Electronic Anesthesia (3M, U.S.A). For periods of electronic stimulation of 10, 20, and 30min, the amplitudes of dEMG were measured on the oscilloscope and on the monitor connected to the amplifier. The following results were obtained: The dEMG was decreased to 73.4% of that in the control set after 10 min electroacupunture stimulation (Group I); The dEMG was decreased to 77.1% (10min), 54.0.% (20min) of that in the control set after 20minutes of electroacupunture stimulation (Group II). The dEMG was decreased to 73.3% (10min), 61.9% (20min), 76.2% (30min) of that in the control set after 30 min of electroacupunture stimulation (Group III). From these results, it may be that in the electroacupuncture stimulation on the Zusnali resulted in a reduction of amplitude of dEMG and that the most effective electroacupuncture stimulation period was 20min.
USE OF ACRYLIC RESIN IN RELEASING CHLORHEXIDINE
Lee, Eun-Young ; Choi, Yeong-Chul ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 25, issue 4, 1998, Pages 797~810
The purpose of this study was to develop a new way of delivery system of chlorhexidine using self-curing acrylic resin. Different preparations of chlorhexidine, such as chlorhexidine varnish(
) and chlorhexidine diacetate crystalline, were mixed into self-curing acrylic resin with different methods. Every resin plate was made and was immersed in 100ml of distilled water individually, and kept in an incubator at
. Solution(0.8ml) was collected from the each container at every 24 hours, and the amount of released chlorhexidine in the solution was measured in an ultraviolet spectrophotometer at 255nm. Flexural strength of all of the resin plates in the Experiment 2-A and 2-B were measured using Instron at the end of the experimental periods. The results were as follows: 1. It was found that chlorhexidine was released from the experimental groups in the Experiment 1, 2-A, and 2-B. And the release of chlorhexidine from all of the experimental groups showed a pattern of sustained-release preparation. 2. It seemed likely that a condition of "dryness" reduced a release of chlorhexidine from the chlorhexidine varnish. 3. It may be stated that a method of "chlorhexidine diacetate mix" with the polymer be more efficient than a method of "Chlorzoin mix" with the monomer. 4. Although it was evident that a flexural strength of the acrylic resin plates be reduced by a mix of either Chlorzoin or chlorhexidine diacetate crystalline, it seemed likely that the resin plates except Group 4 and 5 in the Experiment 2-B may be usable in the clinical situation.
A COMPARISON STUDY OF BENZODIAZEPINES TO A CHLORAL HYDRATE AND HYDROXYZINE COMBINATION IN THE SEDATION OF PEDIATRIC DENTAL PATIENTS
Park, Jae-Hong ; Lee, Keung-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 25, issue 4, 1998, Pages 811~824
The purpose of this study was to compare the clinical sedation effect of chloral hydrate and hydroxyzine combination, midazolam, triazolam when young children were sedated for dental treatment. The uncooperative 22 children aged, 25 to 52 months of age(ASA class I) and weighting between 11 and 17kg, participated in the study. Each patient was assigned randomly to receive chloral hydrate(50mg/kg) and hydroxyzine HCl(25mg), midazolam(0.5mg/kg), and triazolam(0.25mg) oral administration : alternative regimens were administered at next appointment. According to rating scale, sleep, crying, movement, and overall behavior response were checked for evaluation of the clinical sedation effect. Pulse rate and oxygen saturation were also measured for monitoring the patients during treatment period by pulse oximeter. The results were as follows: 1. In the evaluation of sedation effect, 90.9% in chloral hydrate and hydroxyzine combination and midazolam, and 77.3% in triazolam were rated "good" or "very good". 2. Sleep was demonstrated to be statistically significant increase in chloral hydrate and hydroxyzine combination group. Despite the fact that chloral hydrate and hydroxyzine group was in a deeper state of sleep, all the children were easily aroused. 3. There were no statistically significance among the three regimens with regard to cry ing, movement, overall behavior. 4. The adverse side effect was vomiting in one patient of chloral hydrate and hydroxyzine combination. There were no clinical sign of respiratory depression.
THE PREVENTIVE EFFECT OF CHLORHEXIDINE VARNISH ON ENAMEL DEMINERALIZATION
Lim, Eun-Kyung ; Choi, Yeong-Chul ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 25, issue 4, 1998, Pages 825~836
The intention of this study was to investigate the preventive effect of chlorhexidine varnish on enamel demineralization. The sample consisted of 57 first premolars scheduled to be extracted for orthodontic purposes. The control group (N=10) was left untreated and the experimental groups were worn with specially designed stainless steel orthodontic bands on premolar for plaque accumulation. The group 1 (N=9) was worn band only, the group 2 (N=19) was applied with chlorhexidine varnish for one time, and the group 3 (N=19) was applied with chlorhexidine varnish for 3 times once a week. After 4 weeks of experimental periods, every specimen were examined by SEM and Vickers hardness test to evaluate and compare the degree of enamel decalcification. The results were as follows: 1. Although SEM revealed various degree of enamel demineralization in every experimental groups, the group 1 showed more severe demineralizations than the group 2 and 3. 2. The mean Vickers Hardness Numbers measured in this study seemed to reveal that there was a statistically significant difference between the control goup and the group 1 (P<0.05), and also a significant difference between the group 1 and the group 2, 3 (P<0.05). And there was no significant difference between the group 2 and the group 3 (p>0.05). 3. The results of VHN did not deemed to show a statistically significant difference between maxillary premolar and mandibular premolar in both group 2 and group 3 (P>0.05).
SYMPTOMS OF CHILDREN WITH RETT SYNDROME:A CASE REPORT
Hwang, Jeong-Hwan ; Lee, Kung-Ho ; Choi, Yeong-Chul ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 25, issue 4, 1998, Pages 837~842
Rett syndrome is a progressive neurological disorder that occurs exclusively in females. The syndrome is characterized by regression of language, motor development, and stereotypic hand movement. Autistic behavior, breathing irregularities, gait dyspraxia, scoliosis, and seizure are also accompanied. The cause of Rett syndrome is unknown, however, it is believed that the X-chromosome might playa significant role in the development of the syndrome. Patients with this syndrome have unusual oral and/or digital habits such as abnormal chewing pattern, bruxism, hypersalivation, micrognathia, high vaulted palate, tongue protrusion with lower posture of tongue, hand biting, digit-hand sucking. Dentists who are aware of distinct manifestations of Rett syndrome will be able to aid in early diagnosis and treatment of the syndrome. Prior to dental treatment for a patient with the Rett syndrome under sedation or general anesthesia, one should assess the degree of hypersalivation, apnea, severity of autism, expected life span. Early recognition of the syndrome and also dental treatment with established strict preventive guidelines for patients with the Rett syndrome may obviate the necessity of sedation or general anesthesia. Two cases with the Rett syndome were reported. Both patients had most of the above mentioned typical manifestations of the syndrome. Dental treatment for the case 1(8-year-old) including caries control, stainless steel crown, sealant application was performed under general anesthesia. The case 2 could not be undergone the dental treatment due to poor general conditions.
PRIMANY TOOTH PULPOTOMY USING FERRIC SULFATE
Lee, Sang-Heon ; Lee, Mi-Na ; Lee, Sang-Hoon ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 25, issue 4, 1998, Pages 843~848
Pulpotomy is a frequently used treatment modality in primary teeth. It is method by which infected coronal pulp is removed while retaining vital radicular pulp. Since its introduction in 1930 by Sweet formocresol remains the most popular medicament for this treatment. However, despite its outstanding bactericidal properties, formocresol is known to cause adverse tissue reactions. Theoretically, formocresol disinfects and fixes radicular pulp and thus prevents infection and internal resorption. In reality, however, it leads to chronic inflammation and is sometimes responsible for failures through abscess formation and internal root resorption. Also, Myers et al., in 1978, reported on the systemic distribution of FC and other studies have followed with reports of its immunological, mutagenic and carcinogenic effects. Much effort has, therefore, focused on the development of alternative medicaments and techniques. Since its introduction in 19C, ferric sulfate proven itself as an effective hemostatic agent and is used as an astringent in dentistry. In 1988, Landau and Johnsen suggested ferric sulfate be used as a medicament in pulpotomy and many studies have focused on it to overcome the toxic effects of FC. Ferric sulfate acts through its ferric ion and iron ion, which react with blood protein leading to aggregation. The aggregated protein acts to plug the blood vessels, causing mechanical hemostasis. As blood clot formation is minimal, there is reduced inflammation of radicular pulp and enhanced healing. There are no reports regarding its systemic distribution. This is a report of cases treated by the author using pulpotomy with ferric sulfate.
AN EXPERIMENTAL STUDY ON THE ANTICARIOGENIC EFFECT OF FLUORIDE-RELEASING PIT AND FISSURE SEALANT
Kim, Jung-Wook ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 25, issue 4, 1998, Pages 849~857
The purpose of this study was to investigate whether fluoride-releasing pit and fissure sealant was more effective in preventing caries than conventional non-fluoride-releasing sealant. Specimens 8mm in diameter were made from sound bovine enamel. Fluoride-releasing pit and fissure sealant(Helioseal F, Vivadent, Schaan, Liechtenstein) and non-fluoride-releasing sealant(Helioseal, Vivadent, Schaan, Liechtenstein) were applied to the specimens and artificial caries was induced. Microhardness and the depth of the carious lesion was measured. The following results were obtained: 1. In group 2, sealed with fluoride-releasing sealant, there was a 58.4% decrease in microhardness. This was significantly less than the 84.4% decrease observed in group 1, sealed with non-fluoride-releasing sealant(p<0.01). 2. The average depth of the artificial carious lesion in group 2 was
. In group 1, sealed with non-fluoride-releasing sealant, the lesion was significantly deeper with an average depth of
(p<0.01). 3. Fluoride-releasing pit and fissure sealant was more anticariogenic compared to non-fluoride-releasing sealant.