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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 23, Issue 4 - Nov 1996
Volume 23, Issue 3 - Aug 1996
Volume 23, Issue 2 - May 1996
Selecting the target year
TOOTH EXTRACTION USING REPLACEMENT THERAPY AND SURGICAL SPLINT IN HEMOPHILIAC PATIENT
Lee, Jae-Mun ; Nam, Soon-Hyeon ; Kim, Young-Jin ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 23, issue 3, 1996, Pages 575~581
Hemophilia is a hereditary condition in which one of the normal blood clotting factors is absent. This sex-linked, recessive disease, transmitted by the female and expressed in some of her male offspring, is characterized by significantly delayed coagulation times and by the tendency to hemorrhage. On the dental treatment especially, surgical procedure, appropriate methods of hemorrhage control are required. These methods are replacement therapy, antifibrinolytic agents, and local hemostatic methods. In this case, we successfully extract residual roots of hemophiliac patient without eccessive post operative bleeding using replacement therapy and surgical splint.
EFFECTS OF LIDOCAINE ON SOMATOSENSORY EVOKED POTENTIALS IN RAT VIBRISSA/BARREL CORTEX
Choi, Byung-Ju ; Lee, Hye-Sook ; Kim, Young-Jin ; Nam, Soon-Heoun ; Kim, Hyun-Jung ; Lee, Maan-Gee G ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 23, issue 3, 1996, Pages 582~592
DENTAL TREATMENT OF THE PATIENT WITH AUTISM AND HEMOPHILIA A UNDER GENERAL ANESTHESIA A CASE REPORT
Park, Kyeong-Sun ; Lee, Keung-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 23, issue 3, 1996, Pages 593~600
This case report is a treatment of patient with hemophilia A and autism. The patient's chief complaint was treatment of dental caries on entire dentition and he has an impacted mesiodens located on the apex of the upper right primary central incisor. The patient was consulted with pediatrician and anesthetist about the detailed discussion of the complexities of hemorrhagic disorder. Because he had some problems of behavior management and bleeding, the treatment was done under the gerneral anesthesia. The following results were obtained. 1. Consult with the patient's physician and hematologist about the replacement therapy and bleeding tendency. 2. For the severe hemophiliac child who requires extensive or surgical treatment, general anesthesia may be indicated for the comprehensive care. 3. For the hemophiliac child who has a behavior management problem due to autism and other defects, general anesthesia may be considerable. 4. Care must be taken during dental procedures not to causing a bleeding. 5. Local hemostatic methods must be acquired for the emergency state. 6. Neve prescribe aspirin or non-steroidal anti-inflammatory drugs such as ibuprofen, indomethacin, and phenylbutazone. These drugs affect platelet aggregation and exaggerate the bleeding defect. 7. Do not be afraid of hemophiliac patient, and never compromise quality of dental care.
TREATMENT OF THE CHILD WITH ROBINOW SYNDROME UNDER GENERAL ANESTHESIA : A CASE REPORT
Park, Jae-Hong ; Lee, Keung-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 23, issue 3, 1996, Pages 601~608
Robinow syndrome or fetal face syndrome is a rare inherited disorder characterized by short stature, mesomelic brachymelia, hypoplastic genitalia, and a typical facial appearence ("fetal face") with frontal bossing, hypertelorism, ear abnormalities, a short upturned nose, long philtrum, micrognathia, and macrocephaly. Intraoral features have included quite a few dental cavities, crowding, hypoplastic uvula, cleft lip or/and cleft palate, gingival hyperplasia, alveolar hyperplasia, enamel hypoplasia, delayed eruption, and congenital missing of the permanent teeth. We report on a 10 years old girl with Robinow syndrome. The patient had most of the typical anomalies of the syndrome and negative family history but, in addition, had mental retardation, hearing loss, and serous otitis media. Intraoral findings included dental cavities, crowding, hypoplastic uvula, repaired cleft palate, and mouth breathing. Dental treatment and V-tube insertion(by dept. of ENT) were performed under general anesthesia. In all cases of Robinow syndrome, thorough evaluation and united treatments with medical specialists should be performed.
CASE REPORTS ON LASER FRENECTOMY
Kim, Yong-Cheol ; Kim, Jong-Soo ; Kim, Yong-Kee ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 23, issue 3, 1996, Pages 609~614
Laser is getting more attention from increasing numbers of dental clinicians by its own several unique characteristics : precision, hemostasis, and bactericidal capacity. It also provides patients with several advantages of minimal tissue damage. faster healing with less postoperative pain and minimal use of local anesthetics. Labial or lingual frenectomies were performed successfully in three pediatric patients using Nd-YAG laser. When compared to the conventional scalpel method, less local anesthetics were needed and the bleeding control was so excellent that any suture was not necessary. The operation sites were completely healed without any infection or complication and discomfort from swelling or pain was not noted in all cases throughout the healing process.
A CASE REPORT ON TREATMENT OF GROWING ANGLE'S CLASS III ANTERIOR CROSSBITE BY FACE MASK
Shin, Jae-Ho ; Shon, Dong-Su ; Kim, Chong-Chul ; Hahn, Se-Hyun ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 23, issue 3, 1996, Pages 615~623
Face mask is an extraoral appliance which used to protract maxilla, and can help in the correction of moderately severe class IlI malocclusions by the anterior displacement of the maxilla and maxillary dentition, and possibly restricting or changing the direction of the growth of the mandible. In three cases the results were followed. 1. Anterior crossbite was corrected 2. Maxilla & maxillary dentition were displaced forwardly. 3. Lingual tipping of the mandibular incisors, and backward & downward rotation of mandible were performed. 4. Acceptable improvement in the class III profile was performed.
TREATMENT OF FUNCTIONAL ANTERIOR OPENBITE IN THE GROWING CHILDREN: A CASE REPORT
Kim, Joo-Hoon ; Kim, Chong-Chul ; Jang, Ki-Taeg ; Shon, Dong-Su ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 23, issue 3, 1996, Pages 624~630
Anterior openbite is defined as the lack of contacts between the functional occluding teeth on vertical line at centric occlusion and classified into functional and skeletal anterior openbite based on its causes and characteristics. Anterior openbite causes masticatory, speech, and esthetic problems in the growing children and difficulties in diagnosis, treatment, and the prediction of its prognosis. We are reporting on the treatment of anterior openbite in the growing children and the results follow as : 1. In the growing children with anterior openbite, the overbite could be increased by the treatment according to its causes and characteristics. 2. The prognosis is not determined by the presence or severity of oral habit but the skeletal tendency of the patient.
ELECTROSURGERY IN DENTAL PRACTICE-A CASE REPORT
Yoon, Jae-Woong ; Lee, Sang-Hoon ; Lee, Kwang-Soo ; Hahn, Se-Hyun ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 23, issue 3, 1996, Pages 631~639
Electrosurgical technique have been used in dentistry as an aid to soft tissue management for nearly 60 years. However, it was not until the late 1960s that the principles of electrosurgery were understood and improved equipment became available. Electrosurgery is a surgical procedure performed on soft tissue utilizing controlled high frequency electricaI(radio-frequency) currents in the range of 1,500,000 to 7,500,000 cyclesper second. The radio-frequency energy used in electrosurgery is able to cut and coagulate tissue because it focuses the energy at the small, active electrode. Advantages of electrosurgery for soft-tissue management during dental procedures include improved hemostasis, ease of tissue modification, improved visibility and so on, but adverse healing responses-including necrosis of soft tissue and sequestration of alveolar bone-have been reported. The present report provides examples of treatment of soft tissue and pulp tissue of primary teeth by electrosurgery. The results are as follows; 1. Electrosurgical techniques can be used for various procedures in pedodontics. 2. Electrosurgical procedures provide improved hemostasis and visibility in the operating field, which enable to remove, reshape, and contour soft tissues easily. 3. In pulpotomy technique, it was difficult to expect the variable pulpal response based on the degree of heat accumulation and the conditions of pulp tissues. Therefore, electrosurgical pulpotomy could not be considered as a method superior to formocresol pulpotomy. 4. A greater degree of dexterity and experiences in manipulation of the electrode is required compared with the conventional scalpel surgery.
A STUDY OF THE MECHANISM OF IMPROVING ACID RESISTANCE OF BOVINE TOOTH ENAMEL AFTER PULSED Nd-YAG LASER IRRADIATION
Lee, Young-Soon ; Shon, Heung-Kyu ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 23, issue 3, 1996, Pages 640~658
The purpose of this study was to examine the mechanism of improving acid resistance of Nd-YAG laser irradiated tooth enamel and determine the most effective energy density for improving acid resistance. The bovine tooth enamel were lased with a pulsed Nd-YAG laser. The energy densities of exposed laser beam were varied from 10 to
. To investigate the degree of improving acid resistance by irradiation, all the samples were submerged to demineralize in 0.5 N
solution for 1 minute. After 1 minute, 0.05 %
was added to the solution for interrupting the demineralization reaction. The amounts of dissolved calcium and phosphate in the solution were measured by using an atomic absorption spectrophotometer and the UV/VIS spectrophotometer, respectively. To examine the mechanism of improving acid resistance, X-ray diffraction analysis, infrared spectroscopy, and scanning electron microscopy were taken. The X-ray diffraction pattern of the samples were obtained in the
radiation using M18HF(Mac Science Co.) with X-ray diffractometer operating at 40 KV and 300 mA. The infra-red spectra of the ground samples in 300 mg KBr pellets 10 mm diameter were obtained in the
range using JASCO 300E spectrophotometer. The scanning electron microscopy was carried out using JSM6400(JEOL Co.) with
times magnification. The results were as follow 1. The concentration of calcium dissolved from laser irradiated enamel with
was significantly lesser than that of unlased control group (p<0.05) 2. From the result of the X-ray diffraction analysis,
-TCP, which increases acid solubility, was identified in lased enamel but the diffraction peaks of (002) and (004) became sharp with increasing energy density of laser irradiation. This means that the crystals in lased samples were grown through the c-axis and subsequently, the acid solubility of enamel decreased. 3. The a-axis parameter was slightly increased by laser irradiation, whereas the c-axis parameter was almost constant except for a little decrease at
. 4. In the infra-red spectra of lased enamels, phosphate bands (
), B-carbonate bands (870,
), and A-carbonate band (
) were observed. The amounts of phosphate bands and the B-carbonate bands were reduced, on the other hand, the amount of the A-carbonate band was increased by increase the energy density. 5. The SEM experiments reveal that the surface melting and recrystallization were appeared at
and the cracks were observed at
. From above results, It may be suggested that the most effective energy density for improving acid resistance of tooth enamel with the irradiation of Nd-YAG laser was
. The mechanism of improving acid resistance were reduction of permeability due to surface melting and recrystallization of lased enamel and reduction of acid solubility of enamel due to decrease of carbonate content and growth of crystal.
REPLANTATION OF COMPLETE AVULSED TEETH DUE TO TRAUMATIC INJURIES. : A CASE REPORT
Cho, Woo-Sung ; Lee, Jae-Ho ; Choi, Byung-Jai ; Shon, Heung-Kyu ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 23, issue 3, 1996, Pages 659~666
The treatment of complete avulsed teeth due to traumatic injuries is replantation procedure. The major complication of replantation are pulp necrosis, ankylosis, and root resorption. It is important to maintain the vitality of periodontal ligament to minimize the complications. The purpose of this case report is to consider the facts that affect the success rate and the prognosis of complete avulsed teeth after replantation. All of these cases had different conditions and transport media. The following results were observed: 1. The successive treatment of complete ayulsed teeth requires the maintainance of vitality of periodontal ligament. 2. The complication of replantation are inflammatory root resorption and ankylosis and in such case, proper endodontic treatment using calcium hydroxide medications and periodic observations are needed. 3. In case of delayed replantation, the use of fluoride and root planning procedure can help to achieve better result. 4. It is more esthetic and functional to maintain the avulsed tooth in mouth.
TREATMENT OF ANTERIOR CROSSBITE IN MIXED DENTITION USING MAXILLARY PROTRACTION APPLIANCE : A CASE REPORT
Kim, Eun-Young ; Choi, Hyung-Jun ; Lee, Jae-Ho ; Choi, Byung-Jae ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 23, issue 3, 1996, Pages 667~673
The prevalence of class III malocclusion is approximately 5
9%, and about one fourth of this malocclusion is due to underdeveloped maxilla. Maxillary protraction appliance is an orthopedic device which promote the growth of a deficient maxilla by applying extraoral force to actively growing patients. The object of using maxillary protraction appliance is to guide a normal growth of maxilla and mandible and improve the occlusal relationship and also improve the facial profile. The author treated three patients whom were diagnosed as a class III malocclusion due to deficient maxilla using maxillary protraction appliance and the followings are the conclusions : 1. In these cases, anterior crossbite was corrected by anterior movement of maxilla and downward backward rotation of mandible and simultaneously, anterior facial height was increased. 2. The amount of dental change compare to skeletal change was greater as the patients got older. 3. When 500gm of force to each side was applied, the treatment period has been decreased. 4. As a result of applying the force between maxillary first primary molar and canine, there was a small degree of changes in palatal plane. So, it can be concluded that the maxillary protraction appliance is effective in treating growing patients with a deficient maxilla.
PERIPHERAL ODONTOGENIC FIBROMA: A CASE REPORT
Chang, Tae-Sook ; Lee, Jae-Ho ; Choi, Hyung-Jun ; Lee, Jong-Gap ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 23, issue 3, 1996, Pages 674~679
The peripheral odontogenic fibroma (WHO type) is a relatively rare and characteristically benign and unencapsulated, exophytic gingival mass of fibrous connective. Odontogenic epithelium is found within the gingival mass, but usually appears to playa minor role when compared to the fibrous component. The connective tissue is ranged from markedly cellular to relatively acellular and well collagenized. but the connective tissue in this case report appears less cellular. Peripheral odontogenic fibroma must be differentiated histologically from peripheral ossifying fibroma, Peripheral cemental epithelial odontogenic tumor and Peripheral ameloblastoma. The author reports the following conclusions after clinical and radiological examination, excisional biopsy and reviewing literatures. 1. Peripheral odontogenic fibroma is rare lesion and frequently occurs in interdental papila as a form of fibroblastic connective tissue including odontogenic epithelium within the lesion. 2. Peripheral odontogenic fibroma must be differentially diagnosed with Peripheral ossifying fibroma by including less cellular connective tissue, odontogenic epithelium and dysplastic dentin 3. Treatment consists of surgical excision including removal of alveolar bone which is eroded under the lesion
ANTERO-POSTERIOR POSITIONING OF MESIODENS ON SURGICAL OPERATION
Hwang, Dong-Hwan ; Choi, Hyung-Jun ; Sohn, Heung-Kyu ; Choi, Byung-Jai ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 23, issue 3, 1996, Pages 680~687
Surgical removal of impacted mesiodens can be performed easily when exact position of mesiodens is identified. This case report is argued about methodological approach of exact antero-posterior postioning of mesiodens using conventional cross-sectional occlusal film and periapical film. The author concludes, 1. Among various methods of positioning mesiodens, exact position of mesiodens can be determined with occlusal film and periapical film. 2. On operation, exact antero-posterior position of mesiodens can be determined with comparing occlusal images of adjacent teeth and anatomic structure to real ones. 3. It is important that exact removal course of mesiodens has to be determined in addition to exact determination of one's position, and that it has to be determined in regard to position, morphological basis, direction of impacted pattern of mesiodens and adjacent anatomic structure. 4. In 2 cases presented, both are mesiodens of inverted conical type, and impacted direction are class I and III respectively according to classification author suggested, and surgery can be perfomed with ease by different approach directions.
GARRE'S OSTEOMYELITIS OF THE MANDIBLE RESOLVED BY ENDODONTIC TREATMENT IN CHILDREN: A CASE REPORT
Lee, Dong-Hyun ; Kim, Dae-Eop ; Lee, Kwang-Hee ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 23, issue 3, 1996, Pages 688~696
Garre's osteomyelitis is a unique form of osteomyelitis characterized rediographically by localized thickening of the periosteum and deposition of laminated subperiosteal bone. The most common inciting factor is a mandibular infection in permanent first molar with necrotic pulp. This disease occurs primarily in children and to date in all instances it has occured only in mandible. It usually results in hard swelling over the jaws, producing facial asymmetry with little or no pain. The overlying skin is normal but can occasionally be inflammed mostly when pain is present. Palpation reveals a usually smooth, bone-hard lesion which feel like an inherent part of the mandible. Unlike other forms of osteomyelitis, there is no marked increase in fever, white bloods cell count, sedimentation rate or alkaline phosphatase value. The treatment of Garre's osteomyelitis usually consist of elimination of the sourses of infection, i.e., either extration of an offending infected teeth or root canal therapy. This treatment almost always results in resolution of the Garre's osteomyelitis. Resistant cases have involved secondary surgery, i.e., decortication and sequestrectomy. This report presents three cases of Garre's osteomyelitis resolved by endodontic treatment. Cliniqtl examination revealed swelling on the face with no tenderness. Periapical radiograph showed deep caries lesion extending into pulp chamber and periapical radiolucency. Occlusal radiograph showed an enlargement of bone and stretching the periosteum. A clinical diagnosis of the Garre's osteomyelitis was made. Endodontic treatment was accomplished with conventional method and restored facial symmetry. Long-term check-ups are necessary to evaluate the results of endodontic treatment.
TREATIMENT OF ANKYLOGLOSSIA USING Z-PLASTY TECHNIQUE: A CASE REPORT
Lee, Ji-Young ; Kim, Dae-Eop ; Lee, Kwang-Hee ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 23, issue 3, 1996, Pages 697~705
Ankyloglossia, or tongue-tie, is a congenital condition which occurs as a result of fusion between the tongue and the floor of the mouth. Ankyloglossia often results in malocclusion with an anterior "open bite" deformity, early prognathism, swallowing problem, speech disorder, and periodontal problem. Generally lingual frenectomy is used for treatment of ankyloglossia, but incomplete operation and simple frenectomy may produce a scar contracture resulting in a more deformed ankyloglossia than was present initially. The Z-plasty is used for the correction of scar contractures and the replacement of missing tissue and this procedure is ideally suited for the treatment of an ankylosed frenum. Most authors advise postponement of any decision for surgical correction of tongue-tie until the age of 4 years, unless the child is having much difficulty with sucking or swallowing. We treated 4 patients with ankyloglossia using Z-plasty technique. As a result, we found out that it was effective for correction of movement limitation of tongue, prevention of relapse. Further, periodic check ups are needed for evaluation of relapse, improvement of speech, and other functions of the tongue.
EFFECTS OF THE METHOD AND PERIOD OF LACTATION ON THE SALIVARY INVERTASE ACTIVITY TEST SCORES AND DECIDUOUS CARIES EXPERIENCE OF CHILDREN
Bae, Sang-Man ; Ro, Dong-Ju ; Kim, Dae-Eop ; Lee, Kwang-Hee ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 23, issue 3, 1996, Pages 706~716
The purpose of this study was to investigate. the effects of the lactation of human or bovine milk and the method of using nursing bottles on the salivary invertase test scores and deciduous caries experience of children. 328 preschool children (boys 178, girls 150) in Iksan city were selected for this study. The parents of the children were asked to answer the questionnaire about the lactation of human or bovine milk and the time of using nursing bottles. The data were obtained from the salvary invertase activity score,(Resazurin Disc Test) deciduous caries experience and the questionnaire. The result were as follows. The invertase activity and caries experience of the human milk higher than that of the bovine milk group(P<0.05). There were significant positive relationships between the lactation period and the invertase activity and between the lactation period and the caries experience(P<0.05). Caries experience had a tendency to increase as the time of using nursing bottles increase (P>0.05).
A STUDY ON THE EFFECT OF ELECTRO-ACUPUNCTURE ON ORAL PAIN
Choi, Yong-Sung ; Lee, Chang-Seop ; Song, Hyeong-Geun ; Lee, Sang-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 23, issue 3, 1996, Pages 717~728
The effects of electro-acupuncture on the pain threshold and the amplitude of dEMG(di-gastric EMG) evoked by the noxious electric stimulation on teeth and gingiva in dogs were studied. Experiments were carried out with 10 dogs weighing 5-8kg. Each animal was anestheticed with Entobar given intraperitoneally in an initial dose of 30mg/kg. Maintenance dose of 5mg/kg/hr was given through a cannula, in the femoral vein, as required to keep up light anesthesia. Bipolar stimulating wire electrodes, 0.1mm in diameter, insulated except for tips, were inserted into the upper canine and palatal gingiva. Rectangular aluminium plate electrodes (15
5mm) were placed on acupuncture points, called Yin-Hsiang, located at both sides of the upper jaw. Rectangular biphasic current pulses of 2Hz, with a
duration, were delivered for 15 minutes. The dEMG activities were recorded from the anterior belly of the digastric muscle(one of the jaw opening muscles) using bipolar wire electrodes. The magnitude of the jaw opening reflex at different intensties of electro-acupuncture(1volt 4volt and 10volt) was estimated by averaging the 30 superimposed dEMGs recorded on an oscilloscope and audiomonitor. Data were analysed statistically with ANOV A and paired t-test. The obtained results were as follows: 1. Pain thresholds were increased 7.7 %, 15.4 %, 17.3 % in the teeth and 11.1 %, 19.0 %, 25.4 % in the gingiva as the intensities of electro-acupuncture increased incrementally. 2. Amplitudes of dEMG were decreaed 8.3%, 22.4%, 27.4% in the teeth and 9.8%, 36.5%, 42.2 % in the gingiva as the intensities of electro-acupuncture increased incrementally. 3. Inhibition of pain responses by the electroacupuncture was more effective in the gingiva than in the teeth.
EARLY ORTHOPEDIC TREATMENT IN CLEFT LIP AND PALATE PATIENT: A CASE REPORT
Yoon, Tae-Won ; Lim, Kwang-Ho ; Lee, Chang-Seop ; Lee, Sang-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 23, issue 3, 1996, Pages 729~735
Cleft lip and palate is the most common malformation in the craniofacial region. The patients with cleft lip and palate have functional problem such as, speech, feeding and respiratory as well as esthetic problem. So, treatment should be done by multidiciplinary team approach. The role of pediatric dentist in the team is advicement for feeding method, guidance of normal growth, caries control and preventive orthodontics. In cleft lip and palate patients, maxillary arch after cheiloplasty is usually collapsed by excessive tension of the scar. This collapse increase the difficulty of later orthodontic treatment. Therefore, the maxillary arch segments should be moved and retaind to normal position as soon as cheiloplasty is done to reduce the need and difficulty of orthodontic treatment. This concept is called by the early orthopedic treatment in cleft lip and palate. Also, this orthopedic appliance works as feeding applince to normal feeding and weight gain We reported two cases of early orthopedic treatment with favorable result in complete bilateral cleft lip and palate patients after cheiloplasty. Patients showed normal weight and their maxillary arch widths were increased.
CASE REPORTS ON TREATMENT OF SKELETAL CLASS III MALOCCLUSION WITH FACE-MASK
Yang, Kyu-Ho ; Lee, Young-Jun ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 23, issue 3, 1996, Pages 736~745
The conventional treatment of skeletal Class III malocclusion has been focused on application of orthopedic force primarily to the mandible. However, In Class III malocclusion with retrograde position or underdevelopment of Maxilla, this approach is not suitable treatment. These patients need an application of orthopedic forces via face-mask to the Maxilla to stimulate its growth and to change the direction of growth. In skeletal Class III patients who were treated by Face-Mask, the following results were obtained. 1. Forward growth of Maxilla was enhanced. 2. Labioversion of upper incisors and linguoversion of lower incisors were observed. 3. Mandible was rotated to clockwise direction and remodeling of B point was observed. 4. Anterior crossbite was corrected by combining of the above results.
ELASTIC CONSTANTS, SHEAR BOND STRENGTH OF TUNNEL RESTORATIVE MATERIALS AND MARGINAL RIDGE STRENGTH OF RESTORED TEETH
Lee, Ka-Yean ; Park, Yeong-Joon ; Yang, Kyu-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 23, issue 3, 1996, Pages 746~763
An alternative design to conventional class II cavity preparation for proximal carious lesions is the tunnel preparation. It preserves the marginal ridge intact, thus making it possible to maintain the natural contact relationship with the adjacent tooth and minimize tooth reduction. This in vitro study was purposed to evaluate the effect of the materials' elastic constants and shear-bond strength on the marginal ridge fracture resistance of teeth restored by the tunnel technique, and to find the materials of choice for tunnel restorations.
, and Tytin were used as restorative material. The elastic constants of each restorative material were evaluated by ultrasonic pulse measurement. Young's modulus and bulk modulus of the restorative materials were evaluated in three specimens for each material type. The shear-bond strength of the restorative materials to the dentin surface was measured after thermocycling 400 times between 6 and
, using ten specimens for each material type. For measuring marginal ridge strength, 60 sound extracted molar teeth were distributed into six groups by size. Sound molar teeth were used as a Control group and unfilled prepared teeth were grouped as Unrestored. Another four groups were named Resinomer group, Ketac-Silver group, Miracle Mix group, and Tytin group by type of restorative material. Tunnel cavity preparation was done with ' 1/2, 2, and 4 round burs in sequence. Initial access to proximal surface was made through an occlusal access preparation started at least 2mm from the marginal ridge, and the proximal opening was formed about 2.5mm below the marginal ridge. After restoration and thermocycling, marginal ridge strength was measured using a universal testing machine. The results were as follows: 1. The Young's modulus of
was 63.95 GPa, followed by
18.48 GPa, and
10.74 GPa showing significant differences between the groups(P<0.05). The bulk modulus of the materials showed the same order as Young's modulus. The value of
showed 59.57 GPa indicating that it will deform less than other materials under the same stress. It was followed by
23.57 GPa, Miracle
12.50 GPa, and
11.60 GPa. 2. The Resinomer group had a shear-bond strength of 7.41 MPa which was significantly higher than those of the Ketac-Silver group (1.80 MPa) and the Miracle Mix group (2.84 MPa) (P<0.01). All the specimens of Tytin group detatched from the dentin surface during thermocycling. 3. The mean marginal ridge strength of the Unrestored group(46.14 kgf) was significantly lower than that of the Control group (84.24 kgf) (P<0.01). The marginal ridge strength of teeth restored by the tunnel technique was, in order, Ketac-Silver group 74.06 kgf, Miracle Mix group 73.36 kgf, Resinomer group 63.47 kgf, and Tytin group 58.76 kgf. The Ketac-Silver, Miracle Mix, and Resinomer groups showed no significant difference with the Control group (P>0.05), but the Tytin group showed significantly lower strength compared to the Control group(P<0.05). The results showed that the marginal ridge strength of the teeth restored by the tunnel technique was not significantly lower than that of sound teeth. They also demonstrated that the bonding strength of the restorative material to the tooth surface should be high and the modulus of elasticity should not be lower than that of the tooth in order to restore the marginal ridge strength to its natural condition.
A STUDY ABOUT THE INDUCTION OF MUTANASE FROM STREPTOMYCES
Yang, Kyu-Ho ; Chung, Jin ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 23, issue 3, 1996, Pages 764~773
The mutan containing
-1,3 bond is an insoluble portion of glucan which is the main component of dental plaque. The secretion of mutanase was assessed with mutan-digesting Streptomyces isolated from soil, and the factors affecting its activity was studied, obtaining the following result. Mutan-digesting Streptomyces was identified as Streptomyces exfoliatus by its characteristics. The effect of dextranase was identified on the media containing blue dextran. A clear zone was produced by Streptomyces exfoliatus on the media containing blue mutan, so showing the secretion of mutanase. A clear zone was significantly produced on the media overlayed with agar containing blue mutan. A clear zone was produced at 2 days after the inoculation of Streptomyces exfoliatus on the media containing below a concentration of 0.025% glucose, at 3 days on the media containing 0.05 % glucose, and at 4 days on the media containing 0.1 % glucose. Mutan-digestion wasn't appeared early by adding other carbohydrates. The higher concentration of peptone, the later appearance of clear zone was on the media containing below a concentration of 0.1 % peptone. These results indicated that the secretion of mutanase was identified from mutan-digesting Streptomyces on the media containing blue mutan, and a clear zone was appeared lately on the media containing higher amount of glucose.