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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Dental Rehabilitation and Applied Science
Journal Basic Information
Journal DOI :
Korean Academy of Stomatognathic Function and Occlusion
Editor in Chief :
Volume & Issues
Volume 29, Issue 4 - Dec 2013
Volume 29, Issue 3 - Sep 2013
Volume 29, Issue 2 - Jun 2013
Volume 29, Issue 1 - Mar 2013
Selecting the target year
Effects of Coronal Thread Pitch in Scalloped Implant with 2 Different Connections on Loading Stress using 3 Dimensional Finite Element Analysis
Choi, Kyung-Soo ; Park, Seong-Hun ; Lee, Jae-Hoon ; Huh, Jung-Bo ; Yun, Mi-Jung ; Jeon, Young-Chan ; Jeong, Chang-Mo ;
Journal of Dental Rehabilitation and Applied Science, volume 29, issue 2, 2013, Pages 111~118
DOI : 10.14368/jdras.2013.29.2.111
Purpose of present study is to investigate the effects of thread pitch in coronal portion in scalloped implant with 2 different connections on loading stress using 3 dimensional finite element analysis. Scalloped implant with 4 different thread pitches (0.4mm, 0.5mm, 0.6, and 0.7mm) in the coronal part was modeled with 2 different implant-abutment connections. Platform matching connection had the same implant and abutment diameter so that they were in flush contact at the periphery while platform mismatching connection had smaller abutment diameter than implant so that their connection was made away from periphery of implant-bone interface. Occlusal loading of 100N force was applied vertically and 30 degree obliquely to all 8 models and the maximum von Mises bone stress was identified. Loading stress as highly concentrated in cortical bone. Platform mismatching scalloped implant with small thread pitch (0.4mm) model had consistently lowest maximum von Mises bone stress in vertical and oblique loads. Platform matching model had lowest maximum von Mises bone stress with 0.6mm thread pitch in vertical load and with 0.4mm thread pitch in oblique load. Platform mismatching connection had important roles in reducing maximum von Mises bone stress. Scalloped implant with smaller coronal thread pitch showed trend of reducing maximum von Mises bone stress under load.
The Esthetic Impact of Extraction and Nonextraction Treatments on Korean People
Lee, Se-Hyeong ; Chung, Dong-Hwa ; Cha, Kyung-Suk ; Lee, Jin-Woo ; Lee, Sang-Min ;
Journal of Dental Rehabilitation and Applied Science, volume 29, issue 2, 2013, Pages 119~126
DOI : 10.14368/jdras.2013.29.2.119
The concept of extraction in orthodontic treatment has been changed many times. Even today, criteria of extraction or nonextraction is still changing. In this study, changes depending on the evaluator`s perception of treatment outcomes were compared in both extraction and nonextraction cases. In this study, premolar extracted 59 patients and nonextracted 60 patients, totally 119 patients who finished orthodontic treatment in Dankook University Dental Hospital orthodontic clinic were enrolled. Evaluation sections made up of specialists and laypersons assessed soft tissue traced from lateral cephalometric radiographs with visual analogue scale before and after the treatment. And the results were statistically analyzed. Thus, the conclusions drawn are as follows: 1. Average score is 5.76 in extraction, which is larger than 5.28 of nonextraction case. Improvement of facial profile was more favorably accepted in extraction case. 2. 5.875 in the group of specialists were higher evaluation than 5.165 in the group of layperson. 3. Specialists gave significantly higher ratings in the extraction than nonextraction. 4. A higher rating in extraction case of the layperson group has no significant difference with nonextraction case. 5. Nonextraction patients were given higher ratings from specialist group. 6. A higher rating of specialist group in extraction case has no significant difference with layperson group.
A Literature Review on Locator Attachment for Implant Overdenture
Cha, Min-Sang ; Kim, Dae-Gon ; Park, Chan-Jin ; Cho, Lee-Ra ;
Journal of Dental Rehabilitation and Applied Science, volume 29, issue 2, 2013, Pages 127~140
DOI : 10.14368/jdras.2013.29.2.127
The Locator attachment is used widely for implant retained overdenture. It can be used solitary and needs small vertical space. Locator can be applicable for parallel implants and divergent implants. Nylon male cap allow personalized retention for each case. In this literature review, initial retention force and changes in retention force of various attachments were evaluated. Rotation freedom and stress distribution around the attachment were reviewed. Moreover, patient satisfaction and maintenance care of Locator attachment were described. From all of the researches, it was drawn that Locator attachment can be used successfully and widely in several clinical situations.
A Literature Review on Nano-Modified Implant Surfaces
Park, Go-Woon ; Cha, Min-Sang ; Kim, Dae-Gon ; Park, Chan-Jin ; Cho, Lee-Ra ;
Journal of Dental Rehabilitation and Applied Science, volume 29, issue 2, 2013, Pages 141~151
DOI : 10.14368/jdras.2013.29.2.141
The nano-surface modification techniques could be classified; internal modifications which enhance surface roughness and porosity in nano level and external modifications as nano particle coating. Nano-modified implant surface has various morphograpies such as nanotube, nanopit, nanonodule and polymorphic structures. Creating surface depends upon preparation method and material, however, there is no standard preparation technique not yet. The nano-modified surfacet is electrochemically stable comparing with the surface modified in micron level. Nano-modified surface has little cytotoxicity, stimulates osteoblast proliferation and differentiation. Moreover, it decreases soft tissue intervention by interrupting the proliferation of fibroblast. Nanostructure has similar size and shape with cells and proteins, consequently leads to good biocompatibility and enhanced osseointegration. However, the actual effect in vivo is limited, due to the distance of effect. Even if nano-modified surface has antibiotic property due to photocatalysis, short duration time makes clinical application questionable. Further investigations should focus on the optimal nano-modified surface, which has many potentials.
Retrospective Evaluation of Implant Retained Overdentures Using Two Implants and Locator Attachments in the Edentulous Mandibles
Lee, Ju-Hyoung ; Sohn, Dong-Seok ; Lee, Cheong-Hee ;
Journal of Dental Rehabilitation and Applied Science, volume 29, issue 2, 2013, Pages 153~162
DOI : 10.14368/jdras.2013.29.2.153
This study compared the marginal bone loss around dental implants that were placed in the canine areas of the mandibles and finded the survival rate of the implants, marginal bone loss around implants and prosthetic complications in 20 patients treated with overdentures retained with Locator attachments. Implants placed in this study showed a 95% survival rate and the average marginal bone loss was 1.21 mm(
) in 94.3 weeks of functional loading. Implant-retained overdentures had various prosthetic complications such as male change, metal cap loosening, Locator attachment loosening, denture teeth change, relining and denture fracture. Implant-retained overdentures using two implants and Locator attachments in the edentulous mandibles is considered as a stable way for long terms because of minimal invasive operation, simple prosthetic process and easy repair.
Radiographic Evaluation of Stiffness of Articular Eminence in the Temporomandibular Joint(TMJ) of Korean Using Dental cone-beam CT
Oh, Sang-Chun ; Han, Ji-Seok ;
Journal of Dental Rehabilitation and Applied Science, volume 29, issue 2, 2013, Pages 163~173
DOI : 10.14368/jdras.2013.29.2.163
When the mandible performs opening movement, the condyle-disk complex conducts sliding movement along the articular eminence. Thus, anatomic configuration of articular eminence is very important to normal movement of TMJ. The purpose of this study was to measure the posterior slope of the articular eminence and evaluate the effect of a pathologic bone change in the condylar head on the stiffness of articular eminence, and compare the differences of the articular eminence slope by gender and age using dental cone-beam CT. As using i-CAT Cone-Beam Computed Tomography, the CT images of 204 TMJs of 102 patients(43 men and 59 women, mean age: 37.7 years) who were diagnosed at Wonkwang University Sanbon Dental Hospital were evaluated. All images were converted into a TMJ analysis mode to observe the continuous sagittal section images and coronal section images of the joints. To observe and assess bone changes in the condyle, three dentists measured the stiffness of the articular eminence on the same images, and when two of the three dentists agreed on their reading, these results were adopted and recorded. The articular eminence slope, considering the condylar anatomic configuration, was measured in three regions, namely, lateral part, central part, and medial part of the condyle. In the cases of a normal condyle(NCBC) and a condyle(CBC) with bone change, the articular eminence slopes were
(CBC) at the medial part,
(CBC) at the central part, and
(CBC) at the lateral part of the condyle. And the articular eminence slope of the condyle with bone change demonstrated less steepness than that of normal condyle (p<0.05). The articular eminence slope showed mediolaterally that it was the steepest at the central, followed by at the medial, and at the lateral (p<0.05). There were no significant differences by the gender and the age (p.0.05).
Early Marginal Bone Loss around Submerged Implants According to the Patterns of Cover Screw Exposures
Choi, Mee-Ra ; Park, Chan-Jin ;
Journal of Dental Rehabilitation and Applied Science, volume 29, issue 2, 2013, Pages 175~182
DOI : 10.14368/jdras.2013.29.2.175
The purpose of this study was to observe and analyze the initial marginal bone resorption changes according to the patterns of cover screw exposures during healing period followed by implants installation. Total 64 fixtures(TiUniteTM, NobelBiocare, Sweden) were installed in partially edentulous jaws of 28 patients, who were selected retrospectively and were shown at least one cover screw exposure. Cover screw exposures were defined at 1 month recall. According to the patterns of exposures, groups were categorized into group 1 (No exposure), group 2 (pin-point exposure), group 3 (less than 1/2 of cover screw), group 4 (more than 1/2 of cover screw), group 5 (total exposure). Periapical radiographs were taken in purpose of changes of marginal bone level between installation and 2 month recall. Healing abutments were secured on the exposure groups at 2 month recall. Results were as follows: 1. Marginal bone resorptions were identified whenever cover screws were exposed. 2. Group 2 and 3 were shown significantly increased bone loss more than other group (P <.05). 3. Group 4 and 5 were shown significantly increased bone loss more than group 1, however, less than other groups ( P <.05). Conclusionally, cover screw exposure may cause marginal bone resorptions, therefore, early connection of healing abutment is clinically helpful.
The Infection Control of Dental Impressions
Lee, Jin-Han ;
Journal of Dental Rehabilitation and Applied Science, volume 29, issue 2, 2013, Pages 183~193
DOI : 10.14368/jdras.2013.29.2.183
The characteristics of dental treatment makes the dental staff frequently contact with patient directly. Also the daily use of high-handpieces, sharp instruments, and needles often causes bleeding on oral cavity. Therefore, the risk of cross transmission grows up. The pathogen from dental practice could spread on not only the practice itself but also the dental laboratory with contaminated impressions and prosthesis. Dental clinic staffs (dentists, dental hygienists and dental technicians) should recognize all the patients have a possibility of cross contamination, and try to prevent the transmission of infection by proper infection control. In this study, we review the articles about disinfection methods and chemical infection agents used for dental impressions, and try to figure out the suitable and effective infection control system of dental impressions.
Intentional Passive Eruption Combined with Scaling and Root Planing of Teeth with Moderate Periodontitis
Lee, Ju-Youn ;
Journal of Dental Rehabilitation and Applied Science, volume 29, issue 2, 2013, Pages 195~202
DOI : 10.14368/jdras.2013.29.2.195
The relationship between occlusion and periodontal health has been studied extensively. Despite this, there are few reports on the effects of intentional passive eruption (IPE) using an occlusal reduction. The aim of this clinical report was to present the favorable long-term results of IPE using an occlusal reduction combined with scaling and root planing. After periodontal examination, teeth were diagnosed as moderate chronic periodontitis with intrabony defects and mobility. IPE was performed using periodic occlusal reduction combined with initial periodontal therapy. All teeth examined healed uneventfully and the patients did not complain of discomfort. It has been clinically well maintained during 8 years after completion of IPE. Overall, these results suggest that the IPE would be helpful in improving periodontal health.
Psoriatic Temporomandibular Joint Arthritis Treated with Multidisciplinary Clinical Treatment : A case study
Cho, Eunae ; Ahn, Hyung Joon ; Park, Ju Hyun ; Kim, Seong Taek ;
Journal of Dental Rehabilitation and Applied Science, volume 29, issue 2, 2013, Pages 203~207
DOI : 10.14368/jdras.2013.29.2.203
Psoriatic arthritis is a chronic inflammatory form of arthritis that is associated with psoriasis. A 54-yr-old male with chronic psoriatic temporomandibular joint arthritis and myofascial pain was treated using methotrexate and a myofascial pain protocol. Jaw pain improved after 3 weeks, however, tenderness to palpation of muscles remained. Comprehensive evaluation and multidisciplinary clinical treatment is required for the treatment of patients with psoriatic temporomandibular joint arthritis.