The Korean Journal of Orthodontics.2012;42(3):155-156. doi:10.4041/kjod.2012.42.3.155
No abstract available.
The Korean Journal of Orthodontics
1970 to Present ISSN: 2234-7518
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The Korean Journal of Orthodontics.2012;42(3):144-154. doi:10.4041/kjod.2012.42.3.144
This article reports the orthodontic treatment of a patient with skeletal mandibular retrusion and an anterior open bite due to temporomandibular joint osteoarthritis (TMJ-OA) using miniscrew anchorage. A 46-year-old woman had a Class II malocclusion with a retropositioned mandible. Her overjet and overbite were 7.0 mm and -1.6 mm, respectively. She had limited mouth opening, TMJ sounds, and pain. Condylar resorption was observed in both TMJs. Her TMJ pain was reduced by splint therapy, and then orthodontic treatment was initiated. Titanium miniscrews were placed at the posterior maxilla to intrude the molars. After 2 years and 7 months of orthodontic treatment, an acceptable occlusion was achieved without any recurrence of TMJ symptoms. The retropositioned mandible was considerably improved, and the lips showed less tension upon lip closure. The maxillary molars were intruded by 1.5 mm, and the mandible was subsequently rotated counterclockwise. Magnetic resonance imaging of both condyles after treatment showed avascular necrosis-like structures. During a 2-year retention period, an acceptable occlusion was maintained without recurrence of the open bite. In conclusion, correction of open bite and clockwise-rotated mandible through molar intrusion using titanium miniscrews is effective for the management of TMJ-OA with jaw deformity.
Congenital Abnormalities ; Female ; Humans ; Jaw ; Lip ; Magnetic Resonance Imaging ; Malocclusion ; Mandible ; Maxilla ; Middle Aged ; Molar ; Mouth ; Open Bite ; Osteoarthritis ; Overbite ; Recurrence ; Retention (Psychology) ; Retrognathia ; Splints ; Temporomandibular Joint ; Titanium
Congenital Abnormalities ; Female ; Humans ; Jaw ; Lip ; Magnetic Resonance Imaging ; Malocclusion ; Mandible ; Maxilla ; Middle Aged ; Molar ; Mouth ; Open Bite ; Osteoarthritis ; Overbite ; Recurrence ; Retention (Psychology) ; Retrognathia ; Splints ; Temporomandibular Joint ; Titanium
Effect of fangchinoline on root resorption during rat orthodontic tooth movement.
The Korean Journal of Orthodontics.2012;42(3):138-143. doi:10.4041/kjod.2012.42.3.138
OBJECTIVE: To evaluate the short-term effect of fangchinoline, an antiinflammatory drug widely used in Asia, on root resorption that is associated with orthodontic tooth movement. METHODS: Twenty-four Wistar rats were randomly divided into 6 groups. Mesial forces of 0, 50, or 100 g were applied to the maxillary first molar of the rats in each group for 14 days by activating nickel-titanium closed-coil springs. One-half of the rats receiving each of these treatments also received injections of 200 microL fangchinoline every 2 days. Finally, movement of the maxillary first molars was measured using digitized radiographs. The molars were extracted and the surfaces of the root resorption craters were recorded using a scanning electron microscope. The distance the molars moved and resorptionarea ratio was measured, and results were analyzed using 2-way ANOVA tests. RESULTS: There were no statistical differences in the distances the first molars moved under 50 or 100 g force, regardless of treatment with fangchinoline. However, the resorption area ratios were significantly smaller in those rats that were treated with both tension and fangchinoline than in those rats treated by tension alone. CONCLUSIONS: Fangchinoline reduced the resorption area ratio in rats and is therefore an important means of alleviating root resorption.
Animals ; Asia ; Benzylisoquinolines ; Electrons ; Gravitation ; Molar ; Rats ; Rats, Wistar ; Root Resorption ; Tooth ; Tooth Movement
Animals ; Asia ; Benzylisoquinolines ; Electrons ; Gravitation ; Molar ; Rats ; Rats, Wistar ; Root Resorption ; Tooth ; Tooth Movement
Variations in surface roughness of seven orthodontic archwires: an SEM-profilometry study.
The Korean Journal of Orthodontics.2012;42(3):129-137. doi:10.4041/kjod.2012.42.3.129
OBJECTIVE: The purpose of this study was to evaluate the surface roughness (SR) of 2 types of orthodontic archwires made by 4 different manufacturers. METHODS: This in vitro experimental study was conducted on 35 specimens of 7 different orthodontic archwires, namely, 1 nickel-titanium (NiTi) archwire each from the manufacturers American Orthodontics, OrthoTechnology, All-Star Orthodontics, and Smart Technology, and 1 stainless steel (SS) archwire each from the manufacturers American Orthodontics, OrthoTechnology, and All-Star Orthodontics. After analyzing the composition of each wire by energy-dispersive X-ray analysis, the SR of each wire was determined by scanning electron microscopy (SEM) and surface profilometry. Data were analyzed using the Kruskal-Wallis and Mann-Whitney U tests (alpha < 0.05). RESULTS: The average SR of NiTi wires manufactured by Smart Technology, American Orthodontics, OrthoTechnology, and All-Star Orthodontics were 1,289 +/- 915 Adegrees, 1,378 +/- 372 Adegrees, 2,444 +/- 369 Adegrees, and 5,242 +/- 2,832 Adegrees, respectively. The average SR of SS wires manufactured by All-Star Orthodontics, OrthoTechnology, and American Orthodontics were 710 +/- 210 Adegrees, 1,831 +/- 1,156 Adegrees, and 4,018 +/- 2,214 Adegrees, respectively. Similar to the results of profilometry, the SEM images showed more defects and cracks on the SS wire made by American Orthodontics and the NiTi wire made by All-Star Orthodontics than others. CONCLUSIONS: The NiTi wire manufactured by All-Star Orthodontics and the SS wire made by American Orthodontics were the roughest wires.
Microscopy, Electron, Scanning ; Orthodontics ; Stainless Steel
Microscopy, Electron, Scanning ; Orthodontics ; Stainless Steel
The Korean Journal of Orthodontics.2012;42(3):118-128. doi:10.4041/kjod.2012.42.3.118
OBJECTIVE: The aim of this study was to investigate and compare the in vivo effects of prostaglandin E2 (PGE2) administered by different methods on orthodontic tooth movement and bone metabolism macroscopically, histopatologically, and biochemically. METHODS: Forty-five young adult New Zealand rabbits were randomly divided into 3 experimental groups (n = 10/group), 1 positive control group (n = 10), and 1 negative control group (n = 5). The experimental rabbits were fitted with springs exerting 20-g reciprocal force on the maxillary incisors and PGE2 (10 microg/mL) was administered by the intravenous, submucosal, or intraligamentous route after appliance insertion and on days 1, 3, 7, and 14 thereafter. All rabbits were sacrificed on day 21 and their premaxillae were resected for histologic evaluation. RESULTS: Tooth movement was observed in the experimental and positive control groups, but the intraligamentous PGE2 group had the highest values of all analyzed parameters, including serum calcium and phosphorus levels and osteoclastic and osteoblastic populations (p < 0.001). CONCLUSIONS: Submucosal and intraligamentous PGE2 administration significantly increases orthodontic tooth movement and bone metabolism, but the intraligamentous route seems to be more effective.
Calcium ; Dinoprostone ; Humans ; Incisor ; Osteoblasts ; Osteoclasts ; Phosphorus ; Rabbits ; Tooth ; Tooth Movement ; Young Adult
Calcium ; Dinoprostone ; Humans ; Incisor ; Osteoblasts ; Osteoclasts ; Phosphorus ; Rabbits ; Tooth ; Tooth Movement ; Young Adult
The Korean Journal of Orthodontics.2012;42(3):110-117. doi:10.4041/kjod.2012.42.3.110
OBJECTIVE: In this study, we measured the cortical bone thickness in the mandibular buccal and lingual areas using computed tomography in order to evaluate the suitability of these areas for application of temporary anchorage devices (TADs) and to suggest a clinical guide for TADs. METHODS: The buccal and lingual cortical bone thickness was measured in 15 men and 15 women. Bone thickness was measured 4 mm apical to the interdental cementoenamel junction between the mandibular canine and the 2nd molar using the transaxial slices in computed tomography images. RESULTS: The cortical bone in the mandibular buccal and lingual areas was thicker in men than in women. In men, the mandibular lingual cortical bone was thicker than the buccal cortical bone, except between the 1st and 2nd molars on both sides. In women, the mandibular lingual cortical bone was thicker in all regions when compared to the buccal cortical bone. The mandibular buccal cortical bone thickness increased from the canine to the molars. The mandibular lingual cortical bone was thickest between the 1st and 2nd premolars, followed by the areas between the canine and 1st premolar, between the 2nd premolar and 1st molar, and between the 1st molar and 2nd molar. CONCLUSIONS: There is sufficient cortical bone for TAD applications in the mandibular buccal and lingual areas. This provides the basis and guidelines for the clinical use of TADs in the mandibular buccal and lingual areas.
Bicuspid ; Female ; Humans ; Male ; Molar ; Tooth Cervix
Bicuspid ; Female ; Humans ; Male ; Molar ; Tooth Cervix
The Korean Journal of Orthodontics.2012;42(3):100-109. doi:10.4041/kjod.2012.42.3.100
OBJECTIVE: A national survey was conducted to assess orthodontic residents' current concepts and knowledge of cleft lip and palate (CLP) management in Korea. METHODS: A questionnaire consisting of 7 categories and 36 question items was distributed to 16 senior chief residents of orthodontic department at 11 dental university hospitals and 5 medical university hospitals in Korea. All respondents completed the questionnaires and returned them. RESULTS: All of the respondents reported that they belonged to an interdisciplinary team. Nineteen percent indicated that they use presurgical infant orthopedic (PSIO) appliances. The percentage of respondents who reported they were 'unsure' about the methods about for cleft repair operation method was relatively high. Eighty-six percent reported that the orthodontic treatment was started at the deciduous or mixed dentition. Various answers were given regarding the amount of maxillary expansion for alveolar bone graft and the estimates of spontaneous or forced eruption of the upper canine. Sixty-seven percent reported use of a rapid maxillary expansion appliance as an anchorage device for maxillary protraction with a facemask. There was consensus among respondents regarding daily wearing time, duration of treatment, and amount of orthopedic force. Various estimates were given for the relapse percentage after maxillary advancement distraction osteogenesis (MADO). Most respondents did not have sufficient experience with MADO. CONCLUSIONS: These findings suggest that education about the concepts and methods of PSIO and surgical repair, consensus regarding orthodontic management protocols, and additional MADO experience are needed in order to improve the quality of CLP management in Korean orthodontic residents.
Cleft Lip ; Consensus ; Surveys and Questionnaires ; Dentition, Mixed ; Hospitals, University ; Humans ; Infant ; Korea ; Orthodontic Extrusion ; Orthopedics ; Osteogenesis, Distraction ; Palatal Expansion Technique ; Palate ; Surveys and Questionnaires ; Recurrence ; Transplants
Cleft Lip ; Consensus ; Surveys and Questionnaires ; Dentition, Mixed ; Hospitals, University ; Humans ; Infant ; Korea ; Orthodontic Extrusion ; Orthopedics ; Osteogenesis, Distraction ; Palatal Expansion Technique ; Palate ; Surveys and Questionnaires ; Recurrence ; Transplants
The Korean Journal of Orthodontics.2012;42(3):99-99. doi:10.4041/kjod.2012.42.3.99
No abstract available.
The Korean Journal of Orthodontics.2016;46(1):55-61. doi:10.4041/kjod.2016.46.1.55
Skeletal anchorage-assisted upper molar distalization has become one of the standard treatment modalities for the correction of Class II malocclusion. The purpose of this study was to analyze maxillary molar movement patterns according to appliance design, with the simultaneous use of buccal fixed orthodontic appliances. The authors devised two distinct types of midpalatal miniscrew-assisted maxillary molar distalizers, a lingual arch type and a pendulum type. Fourteen patients treated with one of the two types of distalizers were enrolled in the study, and the patterns of tooth movement associated with each type were compared. Pre- and post-treatment lateral cephalograms were analyzed. The lingual arch type was associated with relatively bodily upper molar distalization, while the pendulum type was associated with distal tipping with intrusion of the upper molar. Clinicians should be aware of the expected tooth movement associated with each appliance design. Further well designed studies with larger sample sizes are required.
Humans ; Malocclusion ; Molar* ; Orthodontic Appliances ; Sample Size ; Tooth Movement
Humans ; Malocclusion ; Molar* ; Orthodontic Appliances ; Sample Size ; Tooth Movement
The Korean Journal of Orthodontics.2016;46(1):42-54. doi:10.4041/kjod.2016.46.1.42
The aim of this clinical report is to describe the complex treatment of an adult Class III malocclusion patient who was disappointed with the outcome of a previous oral rehabilitation. Interdisciplinary treatment planning was performed with a primary indication for implant removal because of marginal bone loss and gingival recession, followed by orthodontic and surgical procedures to correct the esthetics and skeletal malocclusion. The comprehensive treatment approach included: (1) implant removal in the area of the central incisors; (2) combined orthodontic decompensation with mesial displacement and forced extrusion of the lateral incisors; (3) extraction of the lateral incisors and placement of new implants corresponding to the central incisors, which received provisional crowns; (4) orthognathic surgery for maxillary advancement to improve occlusal and facial relationships; and finally, (5) orthodontic refinement followed by definitive prosthetic rehabilitation of the maxillary central incisors and reshaping of the adjacent teeth. At the three-year follow-up, clinical and radiographic examinations showed successful replacement of the central incisors and improved skeletal and esthetic appearances. Moreover, a Class II molar relationship was obtained with an ideal overbite, overjet, and intercuspation. In conclusion, we report the successful esthetic anterior rehabilitation of a complex case in which interdisciplinary treatment planning improved facial harmony, provided gingival architecture with sufficient width and thickness, and improved smile esthetics, resulting in enhanced patient comfort and satisfaction. This clinical case report might be useful to improve facial esthetics and occlusion in patients with dentoalveolar and skeletal defects.
Adult* ; Crowns ; Dental Implants ; Esthetics ; Follow-Up Studies ; Gingival Recession ; Humans ; Incisor ; Malocclusion* ; Molar ; Orthodontics ; Orthognathic Surgery ; Overbite ; Rehabilitation ; Tooth
Adult* ; Crowns ; Dental Implants ; Esthetics ; Follow-Up Studies ; Gingival Recession ; Humans ; Incisor ; Malocclusion* ; Molar ; Orthodontics ; Orthognathic Surgery ; Overbite ; Rehabilitation ; Tooth
Country
Republic of Korea
Publisher
Korean Association of Orthodontists
ElectronicLinks
http://e-kjo.org/Editor-in-chief
Hyoung-Seon Baik
office@e-kjo.org
Abbreviation
Korean J Orthod
Vernacular Journal Title
대한치과교정학회지
ISSN
2234-7518
EISSN
2005-372X
Year Approved
2007
Current Indexing Status
Currently Indexed
Start Year
1970
Description
The Korean Journal of Orthodontics (KJO) is an international, open access, peer reviewed journal published in January, March, May, July, September, and November each year. It was first launched in 1970 and, as the official scientific publication of Korean Association of Orthodontists, KJO aims to publish high quality clinical and scientific original research papers in all areas related to orthodontics and dentofacial orthopedics. Specifically, its interest focuses on evidence-based investigations of contemporary diagnostic procedures and treatment techniques, expanding to significant clinical reports of diverse treatment approaches.
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