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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Dental Science
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Journal DOI :
Korean Academy of Dental Sciences
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Volume & Issues
Volume 7, Issue 2 - Dec 2014
Volume 7, Issue 1 - Jun 2014
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Effect of Different Surface Treatment on the Shear Bond Strength between Yttria-Tetragonal Zirconia Polycrystal and Non-10-Methacryloyloxydecyl Dihydrogen Phosphate-Containing Resin Cement
Lee, Yoon ; Yi, Young-Ah ; Kim, Sin-Young ; Seo, Deog-Gyu ;
Journal of Korean Dental Science, volume 7, issue 2, 2014, Pages 49~57
DOI : 10.5856/JKDS.2014.7.2.49
Purpose: To evaluate the effect of different surface treatment methods (yttria-tetragonal zirconia polycrystal [Y-TZP] primers, air-abrasion, and tribochemical surface treatment) on the shear bond strength between (Y-TZP) ceramics and etch-and-rinse non-10-methacryloyloxydecyl dihydrogen phosphate (MDP)-containing resin cements. Materials and Methods: Y-TZP ceramic surfaces were ground flat with 600-grit silicone carbide abrasives paper and then divided into seven groups of ten. They were treated as the following: untreated (control), Monobond Plus (IvoclarVivadent), Z-PRIME Plus (Bisco Inc.), ESPE Sil with CoJet (3M ESPE), air-abrasion, Monobond Plus with air-abrasion, and Z-PRIME Plus with air-abrasion. The surface of Y-TZP specimens was analyzed under a scanning electron microscope (SEM). Non-MDP-containing cements were placed on the surface-treated Y-TZP specimens. After thermocycling, shear bond strength test was performed. Bond strength values were statistically analyzed using one-way analysis of variance and Student-Newman-Keuls multiple comparison test (P<0.05). Result: The Z-PRIME Plus treatment in combination with air-abrasion produced the highest bond strength (
) followed by Monobond Plus combined with air-abrasion (
), air-abrasion (
), ESPE Sil after CoJet treatment (
), Z-PRIME Plus application (
), and then Monobond Plus application (
). The control (
) indicated the lowest results (P<0.05). The SEM results showed different surface morphologies according to surface treatment methods compared with the Y-TZP control. Conclusion: The shear bond strength between the Y-TZP ceramic and the non-MDP-containing resin cement was the greatest when the surface was treated with air-abrasion and MDP-containing Z-PRIME Plus primer.
Effect of Chitosan on Expression of Osteogenic Genes during the Healing of Rat Extraction Socket
Youn, Gap-Hee ; Jung, Seunggon ; Lee, Tae-Hoon ; Kook, Min-Suk ; Park, Hong-Ju ; Oh, Hee-Kyun ;
Journal of Korean Dental Science, volume 7, issue 2, 2014, Pages 58~65
DOI : 10.5856/JKDS.2014.7.2.58
Purpose: This study was performed to evaluate the effect of chitosan combined with absorbable gelatin compressed sponge on the expression of osteoblastic differentiation marker genes during the healing of rat extraction socket. Materials and Methods: Twenty-four male Wistar rats were used. In control group, the extraction socket was closed with suture. In chitosan group, the socket was filled with chitosan combined with Gelfoam (Pharmacia & Upjohn Co.) and closed with suture. In each group, the animals were sacrificed at 3 days, 1 week, 2 weeks, and 4 weeks postoperatively. The expression of osteoblastic differentiation marker genes, including BSP, OCN, Runx2, and Col1 were quantified by real-time polymerase chain reaction. Result: Compared to control group, the mRNA level of BSP in chitosan group increased significantly at 2 weeks after extraction and the level of OCN decreased significantly at 3 days and 4 weeks after extraction (P<0.05). The mRNA levels of OCN, Runx2, and Col1 in chitosan group increased slightly at 2 weeks after extraction, but there was no statistical difference between groups. Conclusion: The results indicate that chitosan has some effects on the expression of osteogenic genes during the healing of extraction sockets.
Evaluation of Tooth Movement and Arch Dimension Change in the Mandible Using a New Three-dimensional Indirect Superimposition Method
Oh, Hyun-Jun ; Baek, Seung-Hak ; Yang, Il-Hyung ;
Journal of Korean Dental Science, volume 7, issue 2, 2014, Pages 66~79
DOI : 10.5856/JKDS.2014.7.2.66
Purpose: To analyze the amount and pattern of tooth movement and the changes in arch dimension of mandibular dentition after orthodontic treatment using a new three-dimensional (3D)-indirect superimposition method. Materials and Methods: The samples consisted of fifteen adult patients with class I bialveolar protrusion and minimal anterior crowding, treated by extraction of four first premolars with conventional sliding mechanics. After superimposition of 3D-virtual maxillary models before and after treatment using best-fit method, 3D-virtual mandibular model at each stage was placed into a common coordinate of superimposition using 3D-bite information, which resulted in 3D-indirect superimposition for mandibular dentition. The changes in mandibular dental and arch dimensional variables were measured with Rapidform 2006 (INUS Technology). Paired t-test was used for statistical analysis. Result: The anterior teeth moved backward, displaced laterally, and inclined lingually. The posterior teeth showed statistically significant contraction toward midsagittal plane. The amounts of backward movement of anterior teeth and forward movement of posterior teeth showed a ratio of 6 : 1. Although the inter-canine width increased slightly (0.8 mm, P<0.05), the inter-second premolar, inter-first molar, and inter-second molar widths decreased significantly with similar amounts (2.2 mm, P<0.05; 2.3 mm, P<0.01; 2.3 mm, P<0.001). The molar depth decreased (6.7 mm, P<0.001) but canine depth did not change. Conclusion: A new 3D-indirect superimposition of the mandibular dentitions using best-fit method and 3D-bite information can present a guideline for virtual treatment planning in terms of tooth position and arch dimension.
Cytotoxicity Evaluation of Elastomeric Impression Materials Using Different Fibroblasts Cell Lines
Kwon, Jae-Sung ; Kim, Kyoung-Nam ;
Journal of Korean Dental Science, volume 7, issue 2, 2014, Pages 80~86
DOI : 10.5856/JKDS.2014.7.2.80
Purpose: Current common method of cytotoxicity evaluation for elastomeric impression materials use animal based cell lines, which the clinical relevance has been often questioned. Hence, the purpose of this study was to examine the difference in results with both human based and animal based fibroblast cell line. Materials and Methods: Three types of fibroblast cells were used in this study; conventional mouse fibroblasts of L929, human gingival fibroblasts (HGF-1), and immortalized human oral fibrobalsts (hTERT-hNOF). Test on extract and test by direct contact using different commercially available elastomeric impression materials were carried out according to the international standards. Result: There was significant difference in cell viability between types of fibroblasts cell used, where HGF-1 showed highest cell viability and L929 the lowest. Conclusion: Within the limitation of this study, careful consideration must be given when selecting the cells and interpreting the results for cytotoxicity evaluation of elastomeric impression materials, where use of human based cell lines such as hTERT-hNOF would be appropriate for both ease of cytotoxicity test and clinical relevance.
Effect of School-Based Fluoride Mouth Rinsing Program in a Socially Deprived Community
Lee, Won-Chul ; Ha, Jung-Eun ; Yeo, Bo-Mi ; Jin, Bo-Hyoung ; Paik, Dai-Il ; Bae, Kwang-Hak ;
Journal of Korean Dental Science, volume 7, issue 2, 2014, Pages 87~93
DOI : 10.5856/JKDS.2014.7.2.87
Purpose: The objective of this study was to evaluate the caries prevention effect of school-based fluoride mouth rinsing (FMR) program implemented in the Hanuul district of Mongolia, which has a very low socioeconomic status and extremely poor infrastructure for oral health. Materials and Methods: One hundred and seventy children aged from 6 to 8 years of the FMR school and 187 children aged from 6 to 8 years of the control school completed the baseline survey. Children from the FMR school rinsed with 0.05% sodium fluoride everyday under supervision, while those from the control school did not. Adjusted caries preventive fraction (CPF) for 2 years were calculated to evaluate the effect of the FMR program. Result: After 2 years, 288 schoolchildren remained in the study. Decayed, missing or filled permanent teeth (DMFT) and index of the FMR and the control schools at baseline were 0.11 and 0.12, respectively, and the average DMFT increment of the FMR and the control schools after 2 years were 0.35 and 0.65, respectively. The adjusted CPF of DMFT was 48.5%. Conclusion: These findings show that a school-based FMR is an effective caries preventive program in a socially deprived community with poor infrastructure for oral health.
Acupuncture Therapy and Herbal Medicine Accelerating Temporal Space Abscess after Tooth Extraction: A Case Report
Lee, Sangip ; Lee, Deok-Won ; Ryu, Dong-Mok ;
Journal of Korean Dental Science, volume 7, issue 2, 2014, Pages 94~98
DOI : 10.5856/JKDS.2014.7.2.94
Numerous oral and maxillofacial surgeons have found facial space infections after tooth extraction. Most of these infections can be managed easily, but some of them could be life-threatening. Among the facial infections, temporal space infections are rare. Most temporal space infections could be observed as secondary to maxillary third molar infections, maxillary sinusitis, and maxillary sinus fractures. Note, however, that there are insufficient studies on temporal space abscess due to mandibular second molars, especially with acupuncture. A 74-year-old female came to our hospital with severe trismus and facial swelling on the right temporal, buccal, posterior auricular, and cervical regions. The patient had undergone extraction of tooth #47 secondary to dental caries by a general dentist about a month ago. After the dental procedure, the patient had been treated with acupuncture therapy around the right temporomandibular joint area at the oriental medicine clinic. We performed emergency incision and drainage under general anesthesia and started antibiotic treatment with IV ampicillin/sulbactam 3 g every 24 hours and vancomycin 1 g every 24 hours for 5 days. The patient`s symptoms subsided and ultimately disappeared. Temporal space abscess after mandibular molar extraction is quite rare. In this case, the spreading mechanism against gravity is considered to be acupuncture therapy.
Clinical Diagnosis and Treatment of Herpes Zoster in an Immunocompromised Dental Patient: A Case Report
Kim, Hyun-Suk ; Ahn, Kyo-Jin ; Kim, Young-Kyun ;
Journal of Korean Dental Science, volume 7, issue 2, 2014, Pages 99~105
DOI : 10.5856/JKDS.2014.7.2.99
Herpes zoster (HZ) is an acute, unilateral inflammatory viral infection characterized by a rash with painful blisters in a localized area of the body. HZ is often associated with intense pain in the acute phase and presents postherpetic neuralgia in the chronic phase. During the prodromal stage of the HZ from the trigeminal nerve, however, the only presenting symptom may be odontalgia, which could be particularly difficult to diagnose. This distinctive syndrome occurs predominantly in the immunocompromised or elderly individuals. In this article, we report a case of HZ developed in the trigeminal nerve of a 60-year-old immunocompromised female patient, whose symptoms including atypical, non-odontogenic odontalgia had improved after series of antiviral treatments.