Abstract:
Objective:The purpose of this study was to investigate the influence of heritability on the craniofacial soft tissue cephalometric characteristics of monozygotic (MZ) twins, dizygotic (DZ) twins, and their siblings (SIB). Methods:The samples comprised Korean adult twins and their siblings (mean age, 39.8 years; MZ group, n = 36 pairs; DZ group, n = 13 pairs of the same gender; and SIB group, n = 26 pairs of the same gender). Thirty cephalometric variables were measured to characterize facial profile, facial height, soft-tissue thickness, and projection of nose and lip. Falconer's method was used to calculate heritability (low heritability, h2 < 0.2; high heritability, h2 > 0.9). After principal components analysis (PCA) was performed to extract the models, we calculated the intraclass correlation coefficient (ICC) value and heritability of each component. Results:The MZ group exhibited higher ICC values for all cephalometric variables than DZ and SIB groups. Among cephalometric variables, the highest h2(MZ-DZ) and h2(MZ-SIB) values were observed for the nasolabial angle (NLA, 1.544 and 2.036), chin angle (1.342 and 1.112), soft tissue chin thickness (2.872 and 1.226), and upper lip thickness ratio (1.592 and 1.026). PCA derived eight components with 84.5% of a cumulative explanation. The components that exhibited higher values of h2(MZ-DZ) and h2(MZ-SIB) were PCA2, which includes facial convexity, NLA, and nose projection (1.026 and 0.972), and PCA7, which includes chin angle and soft tissue chin thickness (2.107 and 1.169). Conclusions:The nose and soft tissue chin were more influenced by genetic factors than other soft tissues.
journal_name
Korean J Orthodjournal_title
Korean journal of orthodonticsauthors
Song J,Chae HS,Shin JW,Sung J,Song YM,Baek SH,Kim YHdoi
10.4041/kjod.2019.49.1.3subject
Has Abstractpub_date
2019-01-01 00:00:00pages
3-11issue
1eissn
2234-7518issn
2005-372Xjournal_volume
49pub_type
杂志文章abstract:OBJECTIVE:The objective of this study was to analyze the patterns of tooth movements when distalization of mandibular molars using a mini-plate took place. A finite element analysis was applied to analyze patterns of tooth movements. METHODS:The model of the mandible and teeth were used to build a finite element analy...
journal_title:Korean journal of orthodontics
pub_type: 杂志文章
doi:10.4041/kjod.2017.47.5.289
更新日期:2017-09-01 00:00:00
abstract:OBJECTIVE:To evaluate the antimicrobial effect of different frequencies of brushing with fluoride toothpaste on the levels of salivary mutans streptococci and lactobacilli in children undergoing fixed orthodontic treatment. METHODS:The study included 22 patients scheduled for fixed orthodontic therapy distributed betw...
journal_title:Korean journal of orthodontics
pub_type: 杂志文章
doi:10.4041/kjod.2012.42.5.263
更新日期:2012-10-01 00:00:00
abstract:OBJECTIVE:The displacement of the hyoid bone (HB) is a critical biomechanical component of the swallowing function. The aim of this study was to evaluate the swallowing-induced vertical and horizontal displacements of the HB in subjects with 2 different magnitudes of skeletal Class III malocclusion, by means of real-ti...
journal_title:Korean journal of orthodontics
pub_type: 杂志文章
doi:10.4041/kjod.2012.42.4.190
更新日期:2012-08-01 00:00:00
abstract::Moving the mandibular posterior teeth into a severely atrophic edentulous space is a challenge. A carefully designed force-and-moment system that results in bodily protraction of the posterior teeth with balanced bone resorption and apposition is needed in such cases. This report describes the treatment of a 19-year-o...
journal_title:Korean journal of orthodontics
pub_type:
doi:10.4041/kjod.2020.50.2.145
更新日期:2020-03-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to evaluate the effectiveness of the use of Reference Ear Plug (REP) during cone-beam computed tomography (CBCT) scan for the generation of lateral cephalograms from CBCT scan data. METHODS:Two CBCT scans were obtained from 33 adults. One CBCT scan was acquired using conventiona...
journal_title:Korean journal of orthodontics
pub_type: 杂志文章
doi:10.4041/kjod.2013.43.2.54
更新日期:2013-04-01 00:00:00
abstract::Because of the potential morbidity and complications associated with surgical procedures, limiting the extent of orthognathic surgery is a desire for many orthodontic patients. An eighteen-year-old woman had a severe Class III malocclusion and required bi-maxillary surgery. By changing the patient's maxillary occlusal...
journal_title:Korean journal of orthodontics
pub_type:
doi:10.4041/kjod.2014.44.6.342
更新日期:2014-11-01 00:00:00
abstract:Objective:This study was performed to investigate the effects of external tooth bleaching with flouridation on the appearance of white spot lesions (WSLs) in vitro. Methods:In total, 125 bracket-bonded bovine incisor enamel blocks with artificial WSLs were randomly divided into a control group and four treatment group...
journal_title:Korean journal of orthodontics
pub_type: 杂志文章
doi:10.4041/kjod.2018.48.6.377
更新日期:2018-11-01 00:00:00
abstract:Objective:To investigate the dental phenotypes and treatment modalities (Tx- Mod) in Korean patients with Parry-Romberg syndrome (PRS) using longitudinal data. Methods:The samples consisted of 10 PRS patients, who were treated and/or followed-up at Seoul National University Dental Hospital between 1998 and 2019. Using...
journal_title:Korean journal of orthodontics
pub_type: 杂志文章
doi:10.4041/kjod.2020.50.6.407
更新日期:2020-11-25 00:00:00
abstract:Objective:The aim of this systematic multiscale analysis was to evaluate the effects of thermoforming on the physical and mechanical properties of thermoplastic materials used to fabricate transparent orthodontic aligners (TOAs). Methods:Specimens were fabricated using four types of thermoplastic materials with differ...
journal_title:Korean journal of orthodontics
pub_type: 杂志文章
doi:10.4041/kjod.2018.48.5.316
更新日期:2018-09-01 00:00:00
abstract::[This corrects the article on p. 3 in vol. 48, PMID: 29291183.]. ...
journal_title:Korean journal of orthodontics
pub_type: 已发布勘误
doi:10.4041/kjod.2019.49.2.137
更新日期:2019-03-01 00:00:00
abstract::Orthodontic closure of old, edentulous spaces in the mandibular posterior region is a major challenge. In this report, we describe a method of orthodontic closure of edentulous spaces in the mandibular posterior region accelerated by piezoelectric decortication and alveolar ridge expansion. Combined piezosurgical and ...
journal_title:Korean journal of orthodontics
pub_type:
doi:10.4041/kjod.2013.43.6.302
更新日期:2013-12-01 00:00:00
abstract::Cleidocranial dysplasia (CCD), an autosomal dominant disorder with a prevalence of 1 in 1,000,000 individuals, is mainly caused by mutations in Runx2, a gene required for osteoblastic differentiation. It is generally characterized by hypoplastic clavicles, narrow thorax, and delayed or absent fontanel closure. Importa...
journal_title:Korean journal of orthodontics
pub_type:
doi:10.4041/kjod.2013.43.5.248
更新日期:2013-10-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to evaluate the clinical efficacy of polymer- and rhodium-coated wires compared to uncoated wires by measuring the frictional forces using self-ligation brackets. METHODS:0.016-inch nickel titanium (NiTi) wires and 0.017 × 0.025-inch stainless steel (SS) wires were used, and the...
journal_title:Korean journal of orthodontics
pub_type: 杂志文章
doi:10.4041/kjod.2014.44.4.157
更新日期:2014-07-01 00:00:00
abstract::The aim of this study was to test the clinical application of an intraoral scanner for serial evaluation of orthodontic tooth movement. The maxillary dentitions of eight patients with fixed orthodontic appliances were scanned using an intraoral scanner at the beginning of treatment (T0), and at 1 month (T1), 2 months ...
journal_title:Korean journal of orthodontics
pub_type: 杂志文章
doi:10.4041/kjod.2018.48.4.262
更新日期:2018-07-01 00:00:00
abstract:Objective:To evaluate the short-term changes in masticatory muscle activity and mandibular movement patterns after orthognathic surgery in skeletal Class III patients with facial asymmetry. Methods:Twenty-seven skeletal Class III adult patients were divided into two groups based on the degree of facial asymmetry: the ...
journal_title:Korean journal of orthodontics
pub_type: 杂志文章
doi:10.4041/kjod.2019.49.4.254
更新日期:2019-07-01 00:00:00
abstract::This case report illustrates the successful treatment of a patient with skeletal Class II malocclusion and an unesthetic smile involving excessive gingival display and large buccal corridors. By applying dual buccal interradicular miniscrews, total intrusion of the maxillary dentition along with distalization was indu...
journal_title:Korean journal of orthodontics
pub_type:
doi:10.4041/kjod.2017.47.1.59
更新日期:2017-01-01 00:00:00
abstract::The committee of admitted doctors developed a questionnaire regarding medical dispute and distributed it to 1,600 members of Korean Academy of Orthodontics. The questionnaire consisted of three categories and 56 items covering basic information about the doctors and patients who had experienced medical disputes, the c...
journal_title:Korean journal of orthodontics
pub_type: 杂志文章
doi:10.4041/kjod.2014.44.1.5
更新日期:2014-01-01 00:00:00
abstract:Objective:This study examined cone-beam computed tomography (CBCT)-derived multiplanar-reconstructed (MPR) cross-sections to clarify the salient characteristics of patients with skeletal class III malocclusion with midface deficiency (MD). Methods:The horizontal and sagittal plane intersection points were identified f...
journal_title:Korean journal of orthodontics
pub_type: 杂志文章
doi:10.4041/kjod.2018.48.3.143
更新日期:2018-05-01 00:00:00
abstract::This case report presents the orthodontic treatment of a 25-year-old patient with skeletal Class II and severe maxillary arch crowding, moderate mandibular arch crowding, anterior crossbite, and a missing lower incisor. He was treated with molar distalization using a modified C-palatal plate and temporary anchorage de...
journal_title:Korean journal of orthodontics
pub_type:
doi:10.4041/kjod.2020.50.1.52
更新日期:2020-01-01 00:00:00
abstract::This article describes the orthodontic treatment of a 31-year-old Korean female patient with gummy smile and crowding. The patient showed excessive gingival display in both the anterior and posterior areas and a large difference in gingival heights between the anterior and posterior teeth in the maxilla. To correct th...
journal_title:Korean journal of orthodontics
pub_type:
doi:10.4041/kjod.2013.43.3.147
更新日期:2013-06-01 00:00:00
abstract: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 unive...
journal_title:Korean journal of orthodontics
pub_type: 杂志文章
doi:10.4041/kjod.2012.42.3.100
更新日期:2012-06-01 00:00:00
abstract:OBJECTIVE:To investigate the effects of frontal facial type (FFT) and sex on preferred chin projection (CP) in three-dimensional (3D) facial images. METHODS:Six 3D facial images were acquired using a 3D facial scanner (euryprosopic [Eury-FFT], mesoprosopic [Meso-FFT], and leptoprosopic [Lepto-FFT] for each sex). After...
journal_title:Korean journal of orthodontics
pub_type: 杂志文章
doi:10.4041/kjod.2017.47.2.108
更新日期:2017-03-01 00:00:00
abstract:OBJECTIVE:The aims of our study were to verify the validity of the T-Scan III system (Tekscan) as an objective occlusal evaluation tool, and to assess the differences between two occlusal indexes-the peer assessment rating (PAR) index and the American Board of Orthodontics objective grading system (OGS)-by comparing th...
journal_title:Korean journal of orthodontics
pub_type: 杂志文章
doi:10.4041/kjod.2016.46.1.27
更新日期:2016-01-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to evaluate the facial dimensions of young adult women with a preferred facial appearance and compare the results with those from the general population. METHODS:Twenty-five linear, nine angular, and three area measurements were made and four ratios were calculated using a sample of...
journal_title:Korean journal of orthodontics
pub_type: 杂志文章
doi:10.4041/kjod.2015.45.5.253
更新日期:2015-09-01 00:00:00
abstract::When a patient shows severe crowding, premolar extraction should be considered to provide required available space for alignment. If the third molars have already erupted and demonstrate a poor prognosis, third molar extraction and distalization of the posterior dentition can be used instead of premolar extraction to ...
journal_title:Korean journal of orthodontics
pub_type:
doi:10.4041/kjod.2019.49.3.194
更新日期:2019-05-01 00:00:00
abstract::In this report, we describe the successful use of alternate rapid maxillary expansions and constrictions with a hybrid hyrax-mandibular miniplate combination and simultaneous orthodontic treatment for the management of severe Class III malocclusion due to maxillary hypoplasia in an 11-year-old girl. The devices were r...
journal_title:Korean journal of orthodontics
pub_type:
doi:10.4041/kjod.2019.49.5.338
更新日期:2019-09-01 00:00:00
abstract:OBJECTIVE:We evaluated the detachment force, amount of deformation, fracture mode, and pull-out force of 3 different wires used for bonded lingual retainer fabrication. METHODS:We tested 0.0215-inch five-stranded wire (PentaOne, Masel; group I), 0.016 × 0.022-inch dead-soft eight-braided wire (Bond-A-Braid, Reliance; ...
journal_title:Korean journal of orthodontics
pub_type: 杂志文章
doi:10.4041/kjod.2012.42.1.39
更新日期:2012-02-01 00:00:00
abstract::This article describes the orthodontic treatment of a 25-year-old Korean female patient with anterior crowding, including palatally displaced lateral incisors. Her facial profile was satisfactory, but 3.5 mm of maxillary anterior crowding was observed. To correct this crowding, we decided to minimize the use of the co...
journal_title:Korean journal of orthodontics
pub_type:
doi:10.4041/kjod.2013.43.4.201
更新日期:2013-08-01 00:00:00
abstract:Objective:To investigate the cephalometric predictors of the future need for orthognathic surgery in Korean patients with unilateral cleft lip and palate (UCLP) despite long-term use of facemask with miniplate (FMMP). Methods:The sample consisted of 53 UCLP patients treated by a single orthodontist using an identical ...
journal_title:Korean journal of orthodontics
pub_type: 杂志文章
doi:10.4041/kjod.2021.51.1.43
更新日期:2021-01-15 00:00:00
abstract:OBJECTIVE:With the introduction of third-generation light-emitting diodes (LEDs) in dental practice, it is necessary to compare their bracket-bonding effects, safety, and efficacy with those of the second-generation units. METHODS:In this study, 80 extracted human premolars were randomly divided into eight groups of 1...
journal_title:Korean journal of orthodontics
pub_type: 杂志文章
doi:10.4041/kjod.2016.46.6.364
更新日期:2016-11-01 00:00:00