To see the other types of publications on this topic, follow the link: Malocclusion. Malocclusion, Angle Class I.
Journal articles on the topic 'Malocclusion. Malocclusion, Angle Class I'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Malocclusion. Malocclusion, Angle Class I.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Rădulescu, Sergiu-Alexandru, and Ecaterina Ionescu. "Statistical study regarding the identification of premature occlusal contacts in patients with Angle class I and class II malocclusions." Romanian Journal of Stomatology 63, no. 2 (June 30, 2017): 80–84. http://dx.doi.org/10.37897/rjs.2017.2.5.
Full textAbstract:
Objective. In this study we tried to identify the premature occlusal contacts that are present in patients with Angle Class I and Class II malocclusions. Materials and method. For this study 60 patients with Angle Class I and Class II malocclusions were examined. Identification of premature occlusal contacts was made both clinically and with the help of study casts mounted in an adjustable articulator. Results and discussion. Based on the statistical analysis made in this study we noticed that for patients with Angle Class I malocclusion, premature occlusal contacts from protrusion on the working side are more common, they are present in 15 patients, than to those with Angle Class II malocclusion where they were identified in 13 patients. In right laterotrusive edge to edge position we noticed that there are premature occlusal contacts on the working side in 43.3% of patients with Angle Class I malocclusion, and 50% of patients with Angle Class II malocclusion. Conclusions. In protrusive and laterotrusive edge to edge position there are premature occlusal contacts both at Angle Class I malocclusion, and in Angle Class II malocclusion patients. For practical conclusions, it is necessary to carry out more studies on the identification of occlusal premature contacts, which may occur in people with malocclusion.
2
Rădulescu, Sergiu-Alexandru, Andreea Paula Rădulescu, Florina Trîmbiţaş, and Ecaterina Ionescu. "Study of occlusion in patients with Angle Class I and Class II malocclusions." Romanian Journal of Stomatology 61, no. 2 (June 30, 2015): 161–66. http://dx.doi.org/10.37897/rjs.2015.2.9.
Full textAbstract:
Objective. In this study we tried to notice the differences in the number and type of occlusal contacts present in patients with Angle Class I and Class-II malocclusions. Materials and methods. For this study were examined 30 patients with Angle Class I and Class-II malocclusions. Identification of the number and type of occlusal contacts was made both clinically and with the help of study casts mounted in an semiadjustable articulator. Results and discussion. In the Angle Class I malocclusion average total number of occlusal contacts was 36.93 and in Angle Class-II malocclusion was 31.46 contacts. Most occlusal contacts identified were side cusp – side fossa type. Following statistical analysis we did not fi nd significant differences between the two classes of malocclusions, in terms of total number of occlusal contacts. Conclusions. The total number of occlusal contacts does not differ depending on the malocclusion class, but there are differences between the number of contacts occurring within certain groups of posterior teeth. In order to have findings with practical application it is necessary to carry out more studies on the type and number of occlusal contacts that may occur in individuals with malocclusions.
3
Florián-Vargas, Karla, Marcos J. Carruitero Honores, Eduardo Bernabé, and Carlos Flores-Mir. "Self-esteem in adolescents with Angle Class I, II and III malocclusion in a Peruvian sample." Dental Press Journal of Orthodontics 21, no. 2 (April 2016): 59–64. http://dx.doi.org/10.1590/2177-6709.21.2.059-064.oar.
Full textAbstract:
ABSTRACT Objective: To compare self-esteem scores in 12 to 16-year-old adolescents with different Angle malocclusion types in a Peruvian sample. Material and Methods: A cross-sectional study was conducted in a sample of 276 adolescents (159, 52 and 65 with Angle Class I, II and III malocclusions, respectively) from Trujillo, Peru. Participants were asked to complete the Rosenberg Self-Esteem Scale (RSES) and were also clinically examined, so as to have Angle malocclusion classification determined. Analysis of covariance (ANCOVA) was used to compare RSES scores among adolescents with Class I, II and III malocclusions, with participants' demographic factors being controlled. Results: Mean RSES scores for adolescents with Class I, II and III malocclusions were 20.47 ± 3.96, 21.96 ± 3.27 and 21.26 ± 4.81, respectively. The ANCOVA test showed that adolescents with Class II malocclusion had a significantly higher RSES score than those with Class I malocclusion, but there were no differences between other malocclusion groups. Supplemental analysis suggested that only those with Class II, Division 2 malocclusion might have greater self-esteem when compared to adolescents with Class I malocclusion. Conclusion: This study shows that, in general, self-esteem did not vary according to adolescents' malocclusion in the sample studied. Surprisingly, only adolescents with Class II malocclusion, particularly Class II, Division 2, reported better self-esteem than those with Class I malocclusion. A more detailed analysis assessing the impact of anterior occlusal features should be conducted.
4
Boiangiu, Ronen, Angelica Bencze, Elina Teodorescu, Stefan Milicescu Jr., Viorica Tarmure, Mariana Pacurar, and Ecaterina Ionescu. "Study Regarding the Applications of Imaging Technology in Cranial Base Morphology in Angle Class II Division 1 and 2 Malocclusions." Revista de Chimie 68, no. 8 (September 15, 2017): 1935–39. http://dx.doi.org/10.37358/rc.17.8.5795.
Full textAbstract:
The aim of the research is to investigate the characteristics of cranial base morphology in class II division 1 and class II division 2 malocclusions. The study group consisted of 40 patients aged 11 years treated at the Orthodontic Department of �Carol Davila� University. Both gender and both malocclusion types were equally represented. Lateral cephalograms were traced and 22 linear and angular cephalometric parameters were calculated: four parameters for the cranial base (N-S-Ba, N-Op-Ba angles, N-S, S-Ba lengths) and 18 parameters for the maxillofacial complex Nsa-Nsp, Go-Gn, Kdl-Go, S-Nsp, N-Nsa, Nsa-Gn, N-Gn, Nsp-Go, SNA angle, ANB angle, SN � NsaNsp angle, SN-GoGn angle, N-Nsa-Gn angle, S-Nsp-Go angle, N-Nsa-Pg angle, gonial angle, FMA angle, NsaNsp � GoGn. Statistical significant differences between cranial base parameters in the two malocclusions groups were depicted, in particular for feminine gender. Regardless of gender, the sphenoidal angle values were mainly increased in both malocclusion groups, when compared to normal population values. The S-Ba lengths were decreased in both malocclusion groups, regardless of gender. More significant alterations of cranial base morphology were depicted in patients with Class II Division 2 malocclusions then in patients with Class II Division 1 malocclusion. The study�s results sustain the existence of some cranial base alterations in Class II malocclusions.
5
Ibrahim, Hiba A., and Amal H. Abuaffan. "Prevalence of Malocclusion and Orthodontic Treatment Needs in Down Syndrome Sudanese Individuals." Orthodontic Journal of Nepal 4, no. 2 (December 31, 2014): 32–36. http://dx.doi.org/10.3126/ojn.v4i2.13896.
Full textAbstract:
Objective: To determine prevalence of malocclusion and orthodontic treatment needs in Down syndrome individuals among Sudanese population in Khartoum area.Materials & Method: A total of 75 (37 males and 38 females) Down syndrome individuals age ranging from 6-28 years were clinically examined after obtaining their guardian’s consent, malocclusion was determined based on Angle and Incisor classification. Exclusion criteria were included individuals who had history of extraction and orthodontic treatment.Data was analysed by using SPSS Version 17, at an alpha level 0.05 and 95% confidence limits.Result: Angle Class III and Incisor III malocclusion represents the most prevalent type of malocclusions (58.7%) Angle classification, (53.3%) Incisors classification. Angle Class III malocclusion was more frequent among females (60.5%) than in males (56.8%). Themajority of individuals with Down syndrome are in need of orthodontic treatment (85.3%).Conclusion: The prevalence of malocclusion and orthodontic treatment need among Sudanese Down syndrome individuals was high. Angle and Incisor Class III malocclusion representing commonest trait of malocclusion with more frequency in femalesthan males.Key word: down syndrome, Class III malocclusion, orthodontic treatment
6
Ibrahim, Hiba A., and Amal H. Abuaffan. "Prevalence of malocclusion and orthodontic treatment needs among down syndrome sudanese individuals." Brazilian Dental Science 18, no. 1 (March 26, 2015): 95. http://dx.doi.org/10.14295/bds.2015.v18i1.1076.
Full textAbstract:
<p><strong>Objective<em>:</em></strong> To determine the prevalence of malocclusion and orthodontic treatment needs in Sudanese’s Down syndrome individuals in Khartoum area. <strong>Material and Methods: </strong>A total of 75 (37 males and 38 females) Down syndrome individuals age ranging from 6-28 years of age, were clinically examined after obtaining their guardian’s consent. Malocclusion was determined based on Angle and Incisor classification of malocclusion. The data were analysed and presented in tables using the Statistic Package for social sciences (SPSS) program version17 descriptive statistic, Frequency distribution tables and graph were utilized to perform the results. <strong>Results: </strong>Angle Class III malocclusion (58.7%) and Incisor III malocclusion<strong> </strong>(53.3%) represents the most prevalent types of malocclusions. Angle class III malocclusion was more frequent among females (60.5%) than males (56.8%).The majority of individuals with Down syndrome are in great need for orthodontic treatment (85.3%). <strong>Conclusion: </strong>The prevalence of malocclusion and orthodontic treatment need among Sudanese Down syndrome individuals was high. Angle and Incisor class III malocclusions represent the commonest trait of malocclusion and reported more frequency in females than males.<strong> </strong>Orthodontic treatment for Down syndrome individual should be multidisciplinary in order to conservative superior treatment pattern.</p><p> </p><p><strong>Keywords:</strong> Down syndrome; Class III malocclusion; Orthodontic treatment.</p>
7
Panainte, Irinel, Victor Suciu, and Krisztina-Ildikó Mártha. "Original Research. Correlation Between Cranial Base Morphology And Various Types Of Skeletal Anomalies." Journal of Interdisciplinary Medicine 2, s1 (March 1, 2017): 57–61. http://dx.doi.org/10.1515/jim-2017-0007.
Full textAbstract:
Abstract Background: Previous studies regarding various types of malocclusions have found correlations between the angle of the base of the skull and prognathism. Aim of the study: This cephalometric study sought to investigate the function of the cranium base angle in different types of malocclusion on a group of Romanian subjects. Materials and methods: Forty-four cephalometric radiographs were selected from patients referred to orthodontic treatment. The cephalometric records were digitized, and with the CorelDRAW Graphics Suite X5 software 22 landmarks have been marked on each radiograph. A number of linear and angular variables were calculated. Results: The angle of the base of the skull was found to be higher in Class II Division 1 subjects compared to the Class I group. The cranial base lengths, N-S and S-Ba, were significantly larger in both categories of Class II malocclusion than in Class I patients, but measurements were comparable in Class I and Class III. The SNA angle showed no considerable variation between Class I subjects and the other groups. SNA-SNP was significantly increased above Class I values in Class II Division1 and Class II Division 2 groups. No significant dissimilarities were observed for these lengths between Class I and Class III patients. Conclusions: The angle of the cranium base (S-N-Ba, S-N-Ar) does not have a major role in the progression of malocclusion. In Angle Class II malocclusion the SNA angle is increased, and SNB is increased in malocclusion Class III. The anterior skull base length is increased in Class II anomalies. The length of the maxillary bone base is increased in Class II malocclusions type; in Class III type of malocclusion the length of the mandible bone is increased.
8
Acharya, Anand, Bhushan Bhattarai, Diana George, and Tarakant Bhagat. "Pattern of Malocclusion in Orthodontic Patients in South-Eastern Region of Nepal." Orthodontic Journal of Nepal 7, no. 1 (June 30, 2017): 7–10. http://dx.doi.org/10.3126/ojn.v7i1.18893.
Full textAbstract:
Introduction: Occlusal traits in orthodontic patients have been studied in different parts of Nepal. However, very few data are available on malocclusion in south-eastern region of Nepal.Objective: To assess the pattern of malocclusion occurring in orthodontic patients in south-eastern region of Nepal, and to estimate the age of presentation of Class II malocclusion among the patients.Materials & Method: Data were collected from 150 pre-treatment study models and lateral cephalograms from two orthodontic specialty clinics in Biratnagar. Angle’s classification system was used to determine dental malocclusion and ANB angle was used to determine skeletal malocclusion. Chi square test was used to test the association between dental and skeleton malocclusions.Result: Angle’s Class I malocclusion was found in 95(63.33%), Class II Div 1 in 41(27.33%), Class II Div 2 in 13(8.66%) and Class III in 1(0.66%). Among all subjects; 119 (79.33%) had skeletal Class I, 24(16%) had skeletal Class II and 7(4.66%) had skeletal Class III. There was significant association between dental and skeletal malocclusions. The average age for reporting Class II Div 1 malocclusion was 16.5 years and Class II Div 2 malocclusion was 19 years.Conclusion: Angle’s Class I is the most common malocclusion followed by Class II and Class III among orthodontic patients in south-eastern Nepal. The subjects lack awareness on age factor for orthodontic treatment.
9
Bernabé, Eduardo, Aubrey Sheiham, and Cesar Messias de Oliveira. "Condition-Specific Impacts on Quality of Life Attributed to Malocclusion by Adolescents with Normal Occlusion and Class I, II and III Malocclusion." Angle Orthodontist 78, no. 6 (November 1, 2008): 977–82. http://dx.doi.org/10.2319/091707-444.1.
Full textAbstract:
Abstract Objective: To compare the prevalence, intensity, and extent of condition-specific oral impacts on quality of life attributed to malocclusion by Brazilian adolescents with normal occlusion and those with Angle Class I, II, and III malocclusion. Materials and Methods: Four groups of 55 adolescents were configured such that each group represented normal occlusion, as well as Angle Class I, II, and III malocclusion. No radiographs were taken. Adolescents aged 15 to 16 years were selected from those attending all secondary schools in Bauru (Sao Paulo, Brazil). The Oral Impacts on Daily Performances index was used to collect data on condition-specific impacts (CSIs) attributed to malocclusion. The prevalence, as well as the intensity and extent, of CSIs was compared among the four groups with the use of Chi-square and Kruskal-Wallis tests, respectively. Results: Groups were comparable according to sex, age, and socioeconomic status. The prevalence of CSI was significantly different between groups (P = .039). Class II and III malocclusion groups reported a higher prevalence of CSI than those with normal occlusion and Class I malocclusion. However, the intensity and extent of CSI were not significantly different between groups. Conclusions: The prevalence, but not the intensity and extent, of CSIs attributed to malocclusion differed among groups with different malocclusions. The present findings support the concept that malocclusion has physical, psychological, and social effects on quality of life.
10
Alhammadi, Maged Sultan, Esam Halboub, Mona Salah Fayed, Amr Labib, and Chrestina El-Saaidi. "Global distribution of malocclusion traits: A systematic review." Dental Press Journal of Orthodontics 23, no. 6 (December 2018): 40.e1–40.e10. http://dx.doi.org/10.1590/2177-6709.23.6.40.e1-10.onl.
Full textAbstract:
Abstract Objective: Considering that the available studies on prevalence of malocclusions are local or national-based, this study aimed to pool data to determine the distribution of malocclusion traits worldwide in mixed and permanent dentitions. Methods: An electronic search was conducted using PubMed, Embase and Google Scholar search engines, to retrieve data on malocclusion prevalence for both mixed and permanent dentitions, up to December 2016. Results: Out of 2,977 retrieved studies, 53 were included. In permanent dentition, the global distributions of Class I, Class II, and Class III malocclusion were 74.7% [31 - 97%], 19.56% [2 - 63%] and 5.93% [1 - 20%], respectively. In mixed dentition, the distributions of these malocclusions were 73% [40 - 96%], 23% [2 - 58%] and 4% [0.7 - 13%]. Regarding vertical malocclusions, the observed deep overbite and open bite were 21.98% and 4.93%, respectively. Posterior crossbite affected 9.39% of the sample. Africans showed the highest prevalence of Class I and open bite in permanent dentition (89% and 8%, respectively), and in mixed dentition (93% and 10%, respectively), while Caucasians showed the highest prevalence of Class II in permanent dentition (23%) and mixed dentition (26%). Class III malocclusion in mixed dentition was highly prevalent among Mongoloids. Conclusion: Worldwide, in mixed and permanent dentitions, Angle Class I malocclusion is more prevalent than Class II, specifically among Africans; the least prevalent was Class III, although higher among Mongoloids in mixed dentition. In vertical dimension, open bite was highest among Mongoloids in mixed dentition. Posterior crossbite was more prevalent in permanent dentition in Europe.
11
Ratya Utari, Tita, and Median Kurnia Putri. "Orthodontic Treatment Needs in Adolescents Aged 13-15 Years Using Orthodontic Treatment Needs Indicators." Journal of Indonesian Dental Association 2, no. 2 (October 31, 2019): 49. http://dx.doi.org/10.32793/jida.v2i2.402.
Full textAbstract:
Introduction: The prevalence of malocclusion in Indonesia is still very high, which is about 80% of the population and is one of the major dental and oral health problems. Based on the research result by the Health Research and Development Department, Ministry of Health Republic Indonesia, the highest malocclusion prevalence in children aged 12-15 years is 15.6%. Problems in adolescents aged 13-15 oral cavity, such as disruption of tooth eruption, can cause malocclusion, related function, aesthetics, and quality of life. Objective: To assess orthodontic treatment need in adolescents aged 13-15 years in Muhammadiyah 3 Junior High School of Yogyakarta using Orthodontic Treatment Needs Indicators, the description of malocclusion classification and their correlation. Method: This research is an analytical observational study with cross-sectional design. Samples are 100 students aged 13-15 years in Muhammadiyah 3 Junior High School of Yogyakarta. Each sample fills out an IKPO questionnaire to assess the need for orthodontic treatment needs, examination, and intraoral photographs were taken to determine the malocclusion classification. Results: The results showed 61% of subjects required orthodontic treatment, and 63% had Class I malocclusion, 28% had Class II malocclusion, and 9% had Class III malocclusions. There was a correlation between the questionnaire of orthodontic treatment needs on age with a significant value, 0.037 (p<0.05). Conclusion: More than 50% of adolescents aged 13-15 years at Muhammadiyah 3 Junior High School of Yogyakarta need orthodontic treatment with the highest malocclusions is Class I Angle malocclusion, and there is a correlation between age and orthodontic treatment needs.
12
Gupitasari, Arimbi, Herniyati ., and Leliana Sandra Devi Ade Putri. "Prevalensi Kebiasaan Buruk Sebagai Etiologi Maloklusi Klas I Angle Pada Pasien Klinik Ortodonsia RSGM Universitas Jember Tahun 2015-2016." Pustaka Kesehatan 6, no. 2 (May 4, 2018): 365. http://dx.doi.org/10.19184/pk.v6i2.8660.
Full textAbstract:
Habit is a repetitive act that is done spontaneously and commonly occurs in childhood. A habit in the oral cavity that can cause malocclusion is called a bad habit. Bad habits can affect the dentofacial functions such as the process of chewing, talking, tooth occlusion, periodontal tissue, and esthetic. If bad habits continue after six years old, they can cause malocclusion. The etiology of malocclusions can be classified into general and local factors. Bad habit is one of the general factors that play a role in the occurrence of malocclusion. Kinds of bad habits are sucking the thumb/finger, pushing the tongue, biting the lips and nails, wrong swallowing habits, breathing through the mouth, and bruxism. The study investigate the prevalence of bad habit and bad habit that mostly happened as etiology of Angle’s Class I malocclusion in patient of Orthodontic Clinic RSGM Jember University. This descriptional study with total sampling technique was conducted by identifying dental records and study models of Angle’s Class I malocclusion that caused by bad habit. Obtained data were tabulated and analysed so that conclusion could be made. Prevalence of Angle’s Class I malocclusion caused by bad habits was 9.4% with the largest distribution in thumb/finger sucking (38,7%), in the age group 9-10 years (50%), and in the male gender (53,6%).
Keywords: Prevalence of bad habits, etiology of Angle’s Class I malocclusion
13
Plaza, Sonia Patricia, Andreina Reimpell, Jaime Silva, and Diana Montoya. "Relationship between skeletal Class II and Class III malocclusions with vertical skeletal pattern." Dental Press Journal of Orthodontics 24, no. 4 (August 2019): 63–72. http://dx.doi.org/10.1590/2177-6709.24.4.063-072.oar.
Full textAbstract:
ABSTRACT Objective: The purpose of this study was to establish the association between sagittal and vertical skeletal patterns and assess which cephalometric variables contribute to the possibility of developing skeletal Class II or Class III malocclusion. Methods: Cross-sectional study. The sample included pre-treatment lateral cephalogram radiographs from 548 subjects (325 female, 223 male) aged 18 to 66 years. Sagittal skeletal pattern was established by three different classification parameters (ANB angle, Wits and App-Bpp) and vertical skeletal pattern by SN-Mandibular plane angle. Cephalometric variables were measured using Dolphin software (Imaging and Management Solutions, Chatsworth, Calif, USA) by a previously calibrated operator. The statistical analysis was carried out with Chi-square test, ANOVA/Kruskal-Wallis test, and an ordinal multinomial regression model. Results: Evidence of association (p< 0.05) between sagittal and vertical skeletal patterns was found with a greater proportion of hyperdivergent skeletal pattern in Class II malocclusion using three parameters to assess the vertical pattern, and there was more prevalent hypodivergence in Class III malocclusion, considering ANB and App-Bpp measurements. Subjects with hyperdivergent skeletal pattern (odds ratio [OR]=1.85-3.65), maxillary prognathism (OR=2.67-24.88) and mandibular retrognathism (OR=2.57-22.65) had a significantly (p< 0.05) greater chance of developing skeletal Class II malocclusion. Meanwhile, subjects with maxillary retrognathism (OR=2.76-100.59) and mandibular prognathism (OR=5.92-21.50) had a significantly (p< 0.05) greater chance of developing skeletal Class III malocclusion. Conclusions: A relationship was found between Class II and Class III malocclusion with the vertical skeletal pattern. There is a tendency toward skeletal compensation with both vertical and sagittal malocclusions.
14
Al-Khateeb, Emad A. A., and Susan N. Al-Khateeb. "Anteroposterior and Vertical Components of Class II division 1 and division 2 Malocclusion." Angle Orthodontist 79, no. 5 (September 1, 2009): 859–66. http://dx.doi.org/10.2319/062208-325.1.
Full textAbstract:
Abstract Objective: To describe and analyze the skeletal and dental characteristics associated with Class II division 1 (Class II/1) and Class II division 2 (Class II/2) malocclusions in the anteroposterior and vertical dimensions. Materials and Methods: A total of 551 lateral cephalograms were used; 293 films of Class II/1 and 258 films of Class II/2 malocclusions. Lateral cephalographs were traced and analyzed. Parameters for both malocclusions were compared with each other and with the norms calculated for the Jordanian population in another study. Results: The maxilla was prognathic in both malocclusions. The mandible was retrognathic in Class II/1 and orthognathic in Class II/2. Vertically, LAFH was significantly reduced in patients with Class II/2 compared with subjects with Class II/1 who exhibited a significantly increased LAFH. In Class II/1, the lower incisors were proclined and the interincisal angle was reduced, while in Class II/2 the lower incisors were at a normal inclination and the interincisal angle was significantly increased. Conclusions: Class II/2 may be considered as a separate entity which differs in almost all skeletal and dental features from Class I and Class II/1. A Class II skeletal pattern and reduced interincisal angle were common features of Class II/1 malocclusion, while a Class II skeletal pattern, increased interincisal angle, and skeletal deep bite were common features of Class II/2 malocclusion.
15
Ali, AW, and MZ Hossain. "A Study on Bolton Anterior Tooth Size Discrepancies among Different Malocclusion Groups." Bangladesh Journal of Orthodontics and Dentofacial Orthopedics 1, no. 2 (July 31, 2013): 1–4. http://dx.doi.org/10.3329/bjodfo.v1i2.15982.
Full textAbstract:
Aim: To investigate the correlation between anterior tooth size discrepancies among Angle's Class l, ll, lll malocclusions and corresponding normal occlusion, as well as their prevalence in Bangladeshi population. This study would act as a reference for diagnosis, treatment planning and assessment of prognosis in some orthodontic cases. Methods: This cross sectional study was conducted in the Department of Orthodontics & Dentofacial Orthopedics, Dhaka Dental College & Hospital. A total number of 200 subjects were selected in Angle's Class l, ll, lll and corresponding normal group. Each group had 50 subjects with males and females. A chi-square test was performed to statistically compare the prevalence of anterior tooth size discrepancies among Angle's Class l, ll, lll malocclusions and corresponding normal occlusion and two genders. Analysis of variance was used to compare the mean Bolton anterior tooth size ratios as a function of angle classification and gender. Statistical differences were determined at the 95% confidence level (p< 0.05). Results: No significant difference was observed in the mean Bolton anterior ratio between normal group and class-I malocclusion group (p = 0.343). Significant differences were observed between Class-II malocclusion and normal group (p=0.001), and also between Class-III malocclusion and normal group (p = 0.001). Individuals with Angle Class lll and Class ll malocclusions showed significantly greater prevalence of tooth size discrepancy than Class l malocclusion and corresponding normal group. Conclusion: The great diversity and ethnic mix of Bangladeshi population should alert our orthodontist to use Bolton analysis as an important diagnostic tool and become aware of the moderate variations that may be present and treated. It may somehow guide planning of this type of study in future. DOI: http://dx.doi.org/10.3329/bjodfo.v1i2.15982 Ban J Orthod & Dentofac Orthop, April 2011; Vol-1, No.2, 1-4
16
Sivakumar, Arvind, Prasad Nalabothu, Huyen Nguyen Thanh, and Gregory S. Antonarakis. "A Comparison of Craniofacial Characteristics between Two Different Adult Populations with Class II Malocclusion—A Cross-Sectional Retrospective Study." Biology 10, no. 5 (May 14, 2021): 438. http://dx.doi.org/10.3390/biology10050438.
Full textAbstract:
The dental, skeletal, and soft-tissue characteristics of a particular malocclusion can differ based on ethnicity, race, age, sex and geographical location with Class II malocclusion being one of the most prevalent malocclusions encountered in orthodontic clinical practice. The broad understanding of the characteristics of vertical skeletal and dental parameters in patients with Class II malocclusion can help clinicians to identify patterns and variations in the expression of this phenotype for better treatment outcomes. Hence, we compared the craniofacial characteristics of skeletal and dental Class II malocclusion traits from Indian and Vietnamese individuals to analyze the vertical skeletal and dental patterns in both population groups. The sample comprised of lateral cephalograms from 100 young adults with Class II malocclusion, of which fifty (25 males and 25 females) were from South India and the other 50 age- and sex-matched adults from Vietnam. The lateral cephalometric radiographs were digitized into anonymous image files and were traced and assessed for 16 vertical skeletal and dental parameters. The ANB angle was greater in males (+1.4 deg; p < 0.001) and females (+1.9 deg; p < 0.001) in the South Indian population. The Vietnamese males had a larger mandibular plane angle, articular angle, anterior facial height and lower anterior facial height compared to the Indian males. The Vietnamese females had larger mandibular plane and articular angles compared to the Indian females. The skeletal class II malocclusion was more severe in the South Indian compared to the Vietnamese adults. The Vietnamese sample showed a generalized tendency towards a more vertical skeletal growth pattern and in males this pattern seemed to be due to the dentoalveolar component. The Vietnamese females showed a tendency towards a vertical growth pattern, but without apparent contribution by the dentoalveolar component.
17
Gelgör, İbrahim Erhan, İhya Ali Karaman, and Ertuğrul Ercan. "Prevalence of Malocclusion Among Adolescents In Central Anatolia." European Journal of Dentistry 01, no. 03 (July 2007): 125–31. http://dx.doi.org/10.1055/s-0039-1698327.
Full textAbstract:
ABSTRACTObjectives: The objective of this study was to describe the prevalence of malocclusion in a population of Central Anatolian adolescents in relation to gender.Methods: The sample comprised 2329 teenagers (1125 boys and 1204 girls), aged between 12 and 17 years (mean age: 14.6 yrs). Occlusal anteroposterior relationships were assessed using the Angle classification. Other variables examined were overjet, overbite, crowding, midline diastema, posterior crossbite, and scissors bite.Results:The results showed that about 10.1% of the subjects had normal occlusions, 34.9% of the subjects had Class I malocclusions, 40.0% had Class II Division 1 malocclusions, 4.7% had Class II Division 2 malocclusions and 10.3% had Class III malocclusions. Over 53.5% had normal overbites, and 18.3%, 14.4%, 5.6%, and 8.2% had increased, reduced, edge-to-edge or anterior open bite values, respectively. Overjet relationship was normal in 58.9%, increased in 25.1%, reversed in 10.4%, and edge-to-edge in 5.6%. A posterior crossbite registered in 9.5% and scissors bite in 0.3%. Anterior crowding was present in 65.2% of the sample and midline diastema in 7.0%. No clear gender differences were noted, except for normal overbite (most frequent in girls, P>.001) and increased overbite (most frequent in boys, P>.05)Conclusions: Class II Division 1 malocclusion is the most prevalent occlusal pattern among the Central Anatolian adolescents and the high values (25.1% and 18.3%) of increased overjet and overbite were a reflection of the high prevalence of Class II malocclusion. (Eur J Dent 2007;1:125-131)
18
Brar, Rajwinder, Mandeep Bhullar, Sanjay Mittal, Divya Singla, and Isha Aggarwal. "Comparison of Crown-Root Relationships of Maxillary Central Incisors in Various Malocclusions." Dental Journal of Advance Studies 07, no. 01 (April 2019): 028–34. http://dx.doi.org/10.1055/s-0039-1685129.
Full textAbstract:
Abstract Objective The purpose of this study is to compare the crown-root and labial crown-root angles in class I, class II division (div) 1, and class II div 2 malocclusions, using cephalometric radiographs, and to find a correlation between crown-root angulation and labial crown-root angle. Materials and Methods A sample of 45 patients (23 females and 22 males) with age range from 11 to 27 years and mean age of 17 years was taken. The sample was divided into class I, class II div 2, and class II div 1 malocclusions with 15 patients in each group. The means for various parameters for each group were calculated, and multiple comparisons were made. For correlation of two parameters, Pearson's correlation was used for normally distributed data. Results Mean crown-root angle for class I was 5.8 ± 6.5; for class II div 1, it was 5.3 ± 4.2; and for class II div 2, it was 15.6 ± 9.69 degrees. Mean labial crown root angle for class I was 28.8 ± 5.8; for class II div 1, it was 27.06 ± 4.9; and for class II div 2, it was 39.8 ± 9.8 degrees. Conclusions Statistically higher values were seen for crown-root angle and labial crown-root angle in class II div 2 malocclusion. A significant correlation was seen between crown-root angle and labial crown-root angle in class I, class II div 1, and class II div 2 malocclusion.
19
Dhakal, Jyoti. "Comparative Dentoskeletal Study of Class II Division 1 and Class II Division 2 Malocclusion Subjects." Orthodontic Journal of Nepal 1, no. 1 (November 1, 2011): 36–41. http://dx.doi.org/10.3126/ojn.v1i1.9365.
Full textAbstract:
The dentoskeletal characteristics of Class II malocclusion subjects were evaluated using cephalometric radiograph and dental cast of 60 untreated patients. The sample included 30 Class II Division 1 and 30 Class II Division 2 malocclusion patients. The inter-canine, inter-premolar, inter-molar, inter-canine alveolar, inter-premolar alveolar, inter-molar alveolar widths are measured on study models. The result showed statistically significant difference between the groups for mandibular inter-canine width only. The cephalometric analysis revealed that SNB angle was responsible for the skeletal sagittal difference between the two groups except for the position of maxillary incisors. No basic difference in dentoskeletal morphology existed between Class II Division 1 and Class II Division 2 malocclusions.
20
Cozza, Paola, Alessandra Marino, and Lorenzo Franchi. "A Nonsurgical Approach to Treatment of High-Angle Class II Malocclusion." Angle Orthodontist 78, no. 3 (May 1, 2008): 553–60. http://dx.doi.org/10.2319/052307-248.1.
Full textAbstract:
Abstract Malocclusions with a hyperdivergent vertical facial pattern are often difficult to treat without a combined surgical/orthodontic approach. The aim of this article is to describe a nonsurgical approach to the treatment of a high-angle Class II malocclusion in a growing patient. Some fundamental aspects, such as correct diagnosis, treatment timing, favorable mandibular growth pattern, and patient compliance, proved to be critical to correct the severe dentoskeletal disharmony.
21
Siddiqui, Hina, Sadia Rizwan, Syed Shah Faisal, and Syed Sheeraz Hussain. "Correlation Between Pharyngeal Airway Space and Sagittal Skeletal Malocclusions." Journal of the Pakistan Dental Association 29, no. 04 (November 5, 2020): 217–22. http://dx.doi.org/10.25301/jpda.294.217.
Full textAbstract:
OBJECTIVE: To determine correlation between pharyngeal airway space and sagittal skeletal malocclusions. METHODOLOGY: Data was collected using pre-treatment records including pre-treatment lateral cephalograms of 54 orthodontic patients. Patients from both gender were included. The age group of selected patients was 15-25 years, Patients belonging to Pakistani ethnicity were included to avoid selection bias. Sagittal skeletal malocclusion was measured by ANB angle to group the skeletal Class I, II and III subjects (ANB=0-4°, ANB > 4° and ANB <0 respectively). Upper pharyngeal space and Lower Pharyngeal space was measured. This cross sectional study was conducted in Orthodontic OPD at Karachi Medical and Dental College, from August 2019 to March 2020. RESULTS: The obtained data showed strong negative correlation between ANB angle and upper pharyngeal space whereas moderately negative correlation between ANB angle and lower pharyngeal space. CONCLUSION: Upper and lower pharyngeal widths were influenced by Sagittal malocclusion. KEYWORDS: Pharyngeal airway space, Sagittal skeletal malocclusion, Obstructive sleep apnea, Sleep disordered breathing, ANB. HOW TO CITE: Siddiqui H, Rizwan S, Faisal SS, Hussain SS. Correlation between pharyngeal airway space and sagittal skeletal malocclusions. J Pak Dent Assoc 2020;29(4):217-222.
22
Junqueira, Patricia, and Milton Costa. "Videofluoroscopy of the oral phase of swallowing in eight to twelve years old children with dental malocclusion." International Journal of Orofacial Myology 39, no. 1 (November 1, 2013): 54–68. http://dx.doi.org/10.52010/ijom.2013.39.1.6.
Full textAbstract:
The objective of this study was to describe the oral phase of swallowing in individuals with dental malocclusion and to generate data that would contribute to the rehabilitation of those patients. The study was based on the evaluation of the swallowing system through videofluoroscopy on thirty-four children of both genders, aged eight to twelve years old who present with Angle Class II and III dental malocclusions. Thirteen children of similar age and gender presenting normal dental occlusion formed the control group. The results indicated that the oral phase of swallowing is different between individuals with normal occlusion and malocclusion. Dental occlusion types Angle Class II and III did not present a swallowing pattern, independently of the amount of liquid ingested. The swallowing appeared effective in the oral phase of individuals with dental malocclusion, even though adaptations were identified. The outcome, in the absence of a single pattern and the efficiency of the adapted swallowing demonstrates, first a need for additional research investigating orofacial myofunctional treatment for patients with malocclusion and second how such analyses should focus on contributing positively to the rehabilitation of these patients.
23
Romanec, Cristian, Sorana Rosu, Georgiana Macovei, Monica Mihaela Scutariu, Bogdan Dragomir, and Nicolae Daniel Olteanu. "Morphofunctional Features in Angle Second Class Malocclusion on Dental Gypsum Models." Materiale Plastice 55, no. 4 (December 30, 2018): 686–90. http://dx.doi.org/10.37358/mp.18.4.5101.
Full textAbstract:
The large diversity of clinical forms in Angle second class malocclusion explains the interest of researchers and clinicians in identifying changes in the dental arch in subdivisions II/1 and II/2. The purpose of the study is to identify the characteristics of the dental alveolar arch in order to determine the differences between class II/l and II/2 malocclusions. The study was conducted on dental gypsum models of 62 orthodontic untreated patients diagnosed with class II/1 Angle malocclusion, respectively class II/2. The results obtained by us reveals a statistically significant differentiation in the dental arcade, a narrowed maxillary arch at the molar level and elongated at premolar and molar level, in subdivision II/l. Our data are consistent with the results of literature. The knowledge of dental arch features serves to develop a correct and complete diagnosis and also to reach the therapeutic goals and to evaluate post-treatment response in short, medium and long term.
24
Vishnu, Sriman, Saravanakumar Subranmanian, Prema Anbarasu, Nagappan Nagappan, Annamalai P.R., and Indra Annamalai. "Validity of Index of Orthodontic Treatment Complexity in Assessing Complexity of Treatment among the Malocclusion Groups." Journal of Evolution of Medical and Dental Sciences 10, no. 14 (April 5, 2021): 1003–7. http://dx.doi.org/10.14260/jemds/2021/215.
Full textAbstract:
BACKGROUND To provide efficient and well-planned orthodontic treatment orthodontists must be able to assess the type of malocclusion and the complexity involved in its treatment. Hence, the purpose of this study was to validate index of orthodontic treatment complexity (IOTC) as a reliable index to assess the treatment complexity in treating different malocclusion groups. METHODS A retrospective study with sample of 120 pairs of orthodontic study model consisting of treated and untreated cases, were collected and equally divided into class I, class II including both division 1 and division 2 and class III malocclusions based on Angles system of classification of malocclusion. Study casts were scored according to criteria given by the index of orthodontic treatment complexity and the degree of complexity is established for each of the malocclusion groups and the occlusal traits. RESULTS The Spearman correlation coefficients test shows that occlusal traits like overjet, centreline discrepancy, molar correction, overbite, crowding, posterior cross bite, alone significantly correlated with degree of complexity. Multiple regression analysis and one way ANOVA tests were performed for the three types of malocclusion and the test showed that in individual classes of malocclusion, the predictor variable (occlusal traits) significantly predicts the degree of complexity in class I and class II malocclusion cases, but not in class III. CONCLUSIONS Overjet, centreline discrepancy, molar correction, overbite, crowding, posterior cross bite correlated with degree of complexity. IOTC forecasts the degree of complexity in class I and class II malocclusion cases, but not in class III. KEY WORDS IOTC, Malocclusion, Occlusal Traits
25
Fan, Xiao-Chuan, Lin-Sha Ma, Li Chen, Diwakar Singh, Xiaohui Rausch-Fan, and Xiao-Feng Huang. "Temporomandibular Joint Osseous Morphology of Class I and Class II Malocclusions in the Normal Skeletal Pattern: A Cone-Beam Computed Tomography Study." Diagnostics 11, no. 3 (March 18, 2021): 541. http://dx.doi.org/10.3390/diagnostics11030541.
Full textAbstract:
(1) Background—The aim of the present study was to evaluate the correlation between the temporomandibular joint (TMJ) osseous morphology of normal skeletal pattern individuals with different dental malocclusions by using cone-beam computed tomography (CBCT). (2) Methods—The CBCT images of bilateral TMJs in 67 subjects with skeletal class I and average mandibular angle (26 males and 41 females, age range 20–49 years) were evaluated in this study. The subjects were divided into class I, class II division 1, and class II division 2 according to the molar relationship and retroclination of the maxillary incisors. Angular and linear measurements of TMJ were evaluated and the differences between the groups were statistically analyzed. (3) Results—Intragroup comparisons showed statistical differences for articular eminence inclination, the width of the glenoid fossa, the ratio of the width of the glenoid fossa to the depth of the glenoid fossa, the condylar angle, and the intercondylar angle between the malocclusion groups. The measurements of the glenoid fossa shape showed no significant difference between the left and right sides. Females showed more differences in the morphological parameters of TMJ between the three malocclusion groups than the males. (4) Conclusion—The present study revealed differences in the TMJ osseous morphology between dental class I and class II malocclusions in the normal skeletal pattern.
26
Gong, Aixiu, Jing Li, Zhendong Wang, Yuan Li, Fang Hu, Qingyi Li, Dengshun Miao, and Lin Wang. "Cranial base characteristics in anteroposterior malocclusions: A meta-analysis." Angle Orthodontist 86, no. 4 (November 3, 2015): 668–80. http://dx.doi.org/10.2319/032315-186.1.
Full textAbstract:
ABSTRACT Objective: To investigate cranial base characteristics in malocclusions with sagittal discrepancies. Materials and Methods: An electronic search was performed in PubMed, Embase, Web of Science, and the Cochrane Library. A fixed- or random-effect model was applied to calculate weighted mean difference with 95% confidence intervals (CIs) according to statistical heterogeneity. Outcome measures were anterior, posterior, and total cranial base length and cranial base angle. Sensitivity analysis and publication bias were conducted. Results: Twenty studies that together included 1121 Class I, 1051 Class II, and 730 Class III cases qualified for the final analysis. Class III malocclusion demonstrated significantly reduced anterior (95% CI: −1.74, −0.53; P < .001 vs Class I; 95% CI: −3.30, −2.09; P < .001 vs Class II) and total cranial base length (95% CI: −3.33, −1.36; P < .001 vs Class I; 95% CI: −7.38, −4.05; P < .001 vs Class II). Further, Class II patients showed significantly greater anterior and total cranial base length than did Class I patients (95% CI: 0.51, 1.87; P < .001 for SN; 95% CI: 2.20, 3.30; P < .001 for NBa). Cranial base angle was significantly smaller in Class III than in Class I (95% CI: −3.14, −0.93; P < .001 for NSBa; 95% CI: −2.73, −0.68; P = .001 for NSAr) and Class II malocclusions (95% CI: −5.73, −1.06; P = .004 for NSBa; 95% CI: −6.11, −1.92; P < .001 for NSAr) and greater in Class II than in Class I malocclusions (95% CI: 1.38, 2.38; P < .001 for NSBa). Conclusions: This meta-analysis showed that anterior and total cranial base length and cranial base angle were significantly smaller in Class III malocclusion than in Class I and Class II malocclusions, and that they were greater in Class II subjects compared to controls.
27
Ward, Dennis M. "Angle Class II, Division 1 malocclusion." American Journal of Orthodontics and Dentofacial Orthopedics 106, no. 4 (October 1994): 428–33. http://dx.doi.org/10.1016/s0889-5406(94)70065-6.
Full text
28
Ferreira, José Tarcísio Lima, Maria do Rosário Ferreira Lima, and Luciana Zappeloni Pizzolato. "Relation between Angle Class II malocclusion and deleterious oral habits." Dental Press Journal of Orthodontics 17, no. 6 (December 2012): 111–17. http://dx.doi.org/10.1590/s2176-94512012000600022.
Full textAbstract:
INTRODUCTION: Oral habits may interfere on the growth and development of the stomatognathic system and orofacial myofunctional conditions, producing changes in the position of teeth in their dental arches. OBJECTIVE: The purpose of this study was to verify the presence of deleterious oral habits in individuals with malocclusion and see if there is a predominance of Class II malocclusion in these individuals. METHODS: The records of 140 patients treated at the Clinic of Preventive Orthodontics FORP-USP who had already completed treatment were randomly selected and analyzed. Their ages ranged from 6 to 10 years and 11 months. Associations were made between the presence or absence of deleterious oral habits, type and number of habits found in each individual and the type of malocclusion according to Angle classification. The statistical analysis used was the Chi-square test with a significance level of 5%. History of deleterious oral habits was found in 67.1% of individuals. RESULTS: The Class I malocclusion was most frequent (82.9%), followed by Class II malocclusion (12.1%) and Class III (5%). CONCLUSION: There was a predominance of Class II malocclusion in individuals with a history of deleterious oral habits.
29
Coello-Vásquez, Santiago, Alberto Alvarado-Cordero, María Delgado-López, and Luisa Salinas-Abarca. "Prevalence of dental malocclusions in 12-year-old schoolchildren from Cuenca, Ecuador." International Journal of Medical and Surgical Sciences 5, no. 1 (August 30, 2018): 7–10. http://dx.doi.org/10.32457/ijmss.2018.004.
Full textAbstract:
The aim of this paper was to determine the prevalence of malocclusions in 12-year-old schoolchildren from Cuenca, Ecuador. A cross-sectional study was carried out, including a clinical examination of 181 schoolchildren aged 12 years, who were randomly selected from the schoolchildren population. We assessed the presence of malocclusions using the Angles classification. The analysis was performed in the program EpiInfo 7.2. The majority of the patients presented malocclusions (91.7%). There is no significant difference between public and private schools and the male sex was slightly more affected. There was a predominance of the Class II division 1 (30.4%), followed by Class III (25.4%), and Class I (24.9%), with the lowest prevalence reported for Class II division 2 (11%). A high rate of malocclusion was found in in 12-year-old schoolchildren from Cuenca, Ecuador, in both males and females. The dominant malocclusion in this study was Class II division 1.
30
Dascălu, Ionela Teodora, Evantia Coleş, Marina Olimpia Amărăscu, Tiberiu Ţîrcă, Oana Andreea Diaconu, Mihaela Stan, and Cristina Maria Andrei. "Research on the clinical aspect of Angle Class II/1 malocclusions (accompanied by the bad habit of sucking the thumb)." Romanian Journal of Stomatology 61, no. 4 (December 31, 2015): 294–97. http://dx.doi.org/10.37897/rjs.2015.4.7.
Full textAbstract:
Sucking the thumb is considered an inborn reflex. However, after the age of four (in case of emotional instability and anxiety) this reflex becomes a bad habit. This vicious habit is one of the most important etiological factors which determine the Angle Class II/1 malocclusion. The research relied on the analysis of the photos of schoolchildren aged 6 to 14 who admitted the persistence of this bad habit and also had Angle Class II/1 malocclusions. We analysed the photos of the face and of the exobuccal and endobuccal profiles. We have chosen two cases from the researched group to highlight the clinical aspects of Angle Class II/1 malocclusions. The patients maintained the bad habit of sucking the thumb which, accompanied by other etiological factors, led to a skeletal disequilibrium. Thus, many modifications may appear such as: upper jaw prognathism and lower jaw retrognathism with a sagittal inocclusion as well as changes of the physiognomy specific to Angle Class II/1 malocclusions. In the case of Angle Class II/1 malocclusions, the coexistence of hereditary and functional pathologic factors generally leads to skeletal and neuro-muscular modifications with aesthetic repercussions.
31
Dascălu, Ionela Teodora, Oana Andreea Diaconu, Lelia Mihaela Gheorghiţă, Marina Olimpia Amărăscu, Evantia Coleş, Tiberiu Ţîrcă, and Monica Scrieciu. "Comparative study of the prevalence of Angle Class II/1 and II/2 malocclusions in the area of Craiova." Romanian Journal of Stomatology 61, no. 3 (September 30, 2015): 227–30. http://dx.doi.org/10.37897/rjs.2015.3.3.
Full textAbstract:
We analysed the prevalence of Angle Class II/1 and Angle Class II/2 subdivisions both to boys and girls. In the researched group, the prevalence of Angle Class II malocclusion was of 17.65%, the first subdivision having values of 13.59% and the second one II/2 of 4.06%. In the case of the schoolchildren’s place of origin (urban/rural) we noticed that the number of Angle malocclusions subdivision II/1 was three times bigger than the subdivision II/2. For both subdivisions, the values of the prevalence were almost equal to boys and girls registering a slight variation to schoolchildren aged (6 to 10) and (11 to 14), both in the rural and the urban area.
32
Moro, Alexandre, Guilherme Janson, Marcos Roberto de Freitas, JoséFernando Castanha Henriques, Nicolau Eros Petrelli, and José Pereira Lauris. "Class II Correction with the Cantilever Bite Jumper." Angle Orthodontist 79, no. 2 (March 1, 2009): 221–29. http://dx.doi.org/10.2319/121807-591.1.
Full textAbstract:
Abstract Objective: To identify the skeletal, dentoalveolar, and soft tissue changes that occur during Class II correction with the Cantilever Bite Jumper (CBJ). Materials and Methods: This prospective cephalometric study was conducted on 26 subjects with Class II division 1 malocclusion treated with the CBJ appliance. A comparison was made with 26 untreated subjects with Class II malocclusion. Lateral head films from before and after CBJ therapy were analyzed through conventional cephalometric and Johnston analyses. Results: Class II correction was accomplished by means of 2.9 mm apical base change, 1.5 mm distal movement of the maxillary molars, and 1.1 mm mesial movement of the mandibular molars. The CBJ exhibited good control of the vertical dimension. The main side effect of the CBJ is that the vertical force vectors of the telescope act as lever arms and can produce mesial tipping of the mandibular molars. Conclusions: The Cantilever Bite Jumper corrects Class II malocclusions with similar percentages of skeletal and dentoalveolar effects. (Angle Orthod. 2009:79; )
33
Kerr, W. J. S., S. Miller, and J. E. Dawber. "Class III Malocclusion: Surgery or Orthodontics?" British Journal of Orthodontics 19, no. 1 (February 1992): 21–24. http://dx.doi.org/10.1179/bjo.19.1.21.
Full textAbstract:
The pre-treatment lateral cephalograms of two groups of 20 subjects with severe Class III malocclusions were compared. One group had been considered suitable for orthodontic correction by the diagnosing clinician and the other offered orthognathic surgery. The most significant differences between the groups were in angle ANB, M/M ratio (P < 0·001), lower incisor inclination and Holdaway angle (P < 0·01). Threshold values for angle ANB and lower incisor angulation below which surgery was almost always carried out were—4 and 83 degrees, respectively.
34
Karadede Ünal, Beyza, and Deniz Dellaloğlu. "Digital analysis of tooth sizes among individuals with different malocclusions: A study using three-dimensional digital dental models." Science Progress 104, no. 3 (July 2021): 003685042110381. http://dx.doi.org/10.1177/00368504211038186.
Full textAbstract:
Objective: It is aimed to examine the tooth sizes of digital models of patients with different malocclusions with the help of three-dimensional measurement software. Methods: Digital models of 252 patients aged between 13 and 25 years of age were included. According to the Angle classification, three different malocclusion groups were allocated such that there were 84 patients in each group, plaster models of patients scanned with the three-dimensional model browser 3Shape R700 3D Scanner (3Shape A/S Copenhagen, Denmark) and transferred to the digital format. 3Shape Ortho Analyzer (3Shape A/S Copenhagen, Denmark) software was used for making the necessary tooth size measurements. Results: When the measurements were evaluated, it was determined that significant changes occurred between tooth sizes of individuals with different malocclusions. Generally, higher values were observed in mesiodistal and buccolingual tooth dimensions of class II individuals compared to other groups. There was no difference between the groups in the anterior ratio values, but when the overall ratio values were evaluated among the groups, a statistically significant difference was determined. Class II malocclusion group was found to have a significantly lower overall ratio of occurrence. Conclusion: Individuals with different malocclusions differ in tooth size.
35
Bauer, Danielle, Carla A. Evans, Ellen A. BeGole, and Larry Salzmann. "Severity of Occlusal Disharmonies in Down Syndrome." International Journal of Dentistry 2012 (2012): 1–6. http://dx.doi.org/10.1155/2012/872367.
Full textAbstract:
Objective. To quantify the severity of malocclusion and dental esthetic problems in untreated Down syndrome (DS) and untreated non-Down syndrome children age 8–14 years old using the PAR and ICON Indices.Materials and Methods. This retrospective study evaluated pretreatment study models, intraoral photographs, and panoramic radiographs of 30 Down syndrome and two groups of 30 non-Down syndrome patients (private practice and university clinic) age 8–14 years. The models were scored via PAR and ICON Indices, and descriptive characteristics such as Angle classification, missing or impacted teeth, crossbites, open bites, and other dental anomalies were recorded.Results. The DS group had significantly greater PAR and ICON scores, as well as 10 times more missing teeth than the non-DS group. The DS group possessed predominantly Class III malocclusions, with the presence of both anterior and posterior crossbites in a majority of the patients. The non-DS group had mostly Class I or II malocclusion with markedly fewer missing teeth and crossbites. The DS group also had more severe malocclusions based upon occlusal traits such as open bite and type of malocclusion.Conclusion. The DS group had very severe malocclusions, while the control group from the university clinic had more severe malocclusions than a control group from a private practice.
36
Jain, Vaibhav, Sandhya Jain, and Merin Kuriakose. "COMPREHENSIVE EVALUATION OF FACTORS LEADING TO CLASS III SUBDIVISION MALOCCLUSION USING 3-D CBCT." International Journal of Advanced Research 8, no. 11 (November 30, 2020): 694–704. http://dx.doi.org/10.21474/ijar01/12058.
Full textAbstract:
Introduction:Several studies have been conducted to assess skeletal and dental asymmetry on Class II subdivision cases but no studies have yet been published to assess such asymmetries for patients with Class III subdivision malocclusion. The purpose of the study was to assess the maxilla-mandibular dimensional and positional asymmetry along with asymmetry at glenoid fossa level and to find out true dental asymmetry at molar and canine level in class III subdivision malocclusion. Materials and Methods: A split mouth prospective study was conducted on Angles Class III subdivision malocclusions (n=15) and CBCT scans were analyzed with 3-D Dolphin software. 3-D and 2-D measurements were recorded to assess asymmetry between class I and class III sides. 2-D measurements were recorded to assess the position of glenoid fossa, joint spaces and condyle dimension, position and their angulation. Results: Statistically significant differences were found in glenoid fossa depth, position of the maxilla, mandible, as well as in gonial angle. Statistically significant dental differences were also found for the position of the mandibular first molars and canines along with total asymmetry (combined skeletal and dental) in maxilla and mandible. Conclusions: The components contributing to Class III subdivision malocclusion were multifactorial involving glenoid fossa asymmetry, positional asymmetry in maxilla and mandible. Mandibular dimensions were more on class III side but it was not statistically significant. True dental asymmetry was also foundin mandible along with total asymmetry in maxilla and mandible.
37
Shimizu, Roberto Hideo, Isabela Almeida Shimizu, Ana Cláudia M. Melo Toyoffuku, Rebecca Marquesini, Tatiane Travizan Lima, and Marcela Villegas. "Abordagem precoce da má oclusão de Classe II esquelética com atresia maxilar e mordida aberta anterior e o uso de alinhadores ClearCorrect – relato de caso." Orthodontic Science and Practice 14, no. 53 (2021): 97–106. http://dx.doi.org/10.24077/2021;1453-97106.
Full textAbstract:
Adequate planning and early treatment of Angle Class II malocclusion with maxillary atresia and anterior open bite provides harmonization of maxillomandibular bone bases in the three planes of space. Orthodontic aligners have emerged as an alternative treatment having the following advantages: being more aesthetic and more comfortable for the patient, less treatment time when they are correctly indicated, less chairside time, less complications, possibility of remote monitoring, easier feeding, and dental hygiene. On the other hand, they offer difficulties to treat adults with severe skeletal Class II malocclusions, posterior crossbite and anterior open bite. Therefore, the objective of this clinical case report is to early correct skeletal Class II malocclusion with maxillary atresia through the use of mechanical orthopedics and devices that help eliminate habits and close the anterior open bite, and later the use of orthodontic aligners to finish the treatment. It was concluded that the early interceptive treatment of malocclusion was efficient to harmonize the bone bases in the anteroposterior, vertical, and transversal directions, changing this malocclusion from high to low complexity and, consequently, highly predictable and with an excellent prognosis for treatment with orthodontic aligners. The treatment with ClearCorrect aligners corrected the occlusion in a shorter period of time when compared to corrective orthodontics and with a high predictability in relation to the virtual setup.
38
Sobral, Marcio Costa, Fernando Antônio de Lima Habib, and Liz Matzenbacher. "Conservative compensatory Angle Class III malocclusion treatment." Dental Press Journal of Orthodontics 17, no. 6 (December 2012): 137–45. http://dx.doi.org/10.1590/s2176-94512012000600025.
Full textAbstract:
INTRODUCTION: Angle's Class III malocclusion is a dental discrepancy in a sagittal view that may appear or not with an important skeletal discrepancy. Facial esthetics may be affected by this skeletal discrepancy and it is one of the most common complaints of patients who seek orthodontic treatment. Class III treatment, in adults, may be done by compensatory tooth movement, in simple cases, or through an association between orthodontics and orthognathic surgery, in more severe cases. OBJECTIVE: This article describes a non-extraction compensatory Class III treatment case, applying the Tweed-Merrifield mechanical principles with headgear (J-Hook) in the mandibular arch. This case was presented at the V Brazilian Association of Orthodontics and Dentofacial Orthopedics (ABOR) Meeting, it was evaluated by members of Brazilian Board of Orthodontics and obtained third place in the general classification.
39
Karki, Saujanya, Umesh Parajuli, Nischal Kunwar, Kunsang Namgyal, and Khamsum Wangdu. "Distribution of Malocclusion and Occlusal Traits among Tibetan Adolescents residing in Nepal." Orthodontic Journal of Nepal 4, no. 2 (December 31, 2014): 28–31. http://dx.doi.org/10.3126/ojn.v4i2.13895.
Full textAbstract:
Introduction: Malocclusion is the irregularity of teeth and is considered as oral health problem. Though etiology of malocclusion is multifactorial, it has considerable impact on the self esteem and social adjustment of an individual.Objective: To determine the prevalence of malocclusion and to assess the association between Angle classification of malocclusion and occlusal traits.Materials & Method: A cross sectional study was conducted among 138 Tibetan students of grade 8-12 were selected. Students with history of orthodontic treatment were excluded from the study. Data was recorded and analyzed using SPSS 17.0 and chi square test was used to evaluate the association between Angle classification of malocclusion and occlusal traits.Result: The prevalence of malocclusion was found to be Angle’s Class I (52.90%), Angle’s Class II (5.10%) and Angle’s Class III (9.40%). Occlusal traits such as overbite, increased overjet, openbite, crossbite, displacement and hypodontia was found to be 5.79%, 10.8%, 10.86%, 9.42%, 50,72% and 4.34% respectively.Conclusion: The prevalence of malocclusion among Tibetan adolescent was found to be higher. Hence, oral health awareness, preventive procedures and promotional programs need to be more emphasized.
40
Fakharian, Mehrnaz, Erfan Bardideh, and Mostafa Abtahi. "Skeletal Class III malocclusion treatment using mandibular and maxillary skeletal anchorage and intermaxillary elastics: a case report." Dental Press Journal of Orthodontics 24, no. 5 (October 2019): 52–59. http://dx.doi.org/10.1590/2177-6709.24.5.052-059.oar.
Full textAbstract:
ABSTRACT Introduction: Skeletal Class III malocclusion is one of the most challenging malocclusions to treat. In around 40% of Class III patients, maxillary retrognathia is the main cause of the problem and in most patients, orthopedic/surgical treatments includes some type of maxillary protraction. Objective: The aim of this case report was to describe a treatment method for a patient with maxillary retrognathia and Class III skeletal discrepancy using mandibular and maxillary skeletal anchorage with intermaxillary elastics. Case report: A 13-year-old boy with maxillary retrognathia and mandibular prognathism was treated using bilateral miniplates. Two miniplates were inserted in the mandibular canine area and two other miniplates were placed in the infrazygomatic crests of the maxilla. Class III intermaxillary elastics were used between the miniplates. Results: After eight months of orthopedic therapy, ANB angle increased by 4.1 degrees and ideal overjet and overbite were achieved. Mandibular plane angle was increased by 2.1 degrees and the palatal plane was rotated counterclockwise by 4.8 degrees. Conclusion: This case showed that the skeletal anchorage treatment method may be a viable option for treating patients with Class III skeletal malocclusion.
41
Maruo, Ivan Toshio. "Class II Division 2 subdivision left malocclusion associated with anterior deep overbite in an adult patient with temporomandibular disorder." Dental Press Journal of Orthodontics 22, no. 4 (August 2017): 102–12. http://dx.doi.org/10.1590/2177-6709.22.4.102-112.bbo.
Full textAbstract:
ABSTRACT The orthodontic treatment of patients with chief complaint of temporomandibular disorders (TMD) presents doubtful prognosis, due to the poor correlation between malocclusions and TMDs. The present case report describes the treatment of an adult patient with Angle Class II Division 2 subdivision left malocclusion associated with anterior deep overbite and TMD. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO), as part of the requirements to obtain the title of BBO Diplomate.
42
Behroz, Erum, Hafiz Zuhair Ahmed, S. M. Tariq Rafi, Tabassum Ahsan Qadeer, Mairah Shah, and Samar Fatima. "Comparison of Collum Angle of Maxillary Central Incisor in High Angle and Low Angle Patients." Journal of the Pakistan Dental Association 30, no. 02 (May 27, 2021): 113–17. http://dx.doi.org/10.25301/jpda.302.113.
Full textAbstract:
OBJECTIVE: This study aims to determine the mean collum angle of maxillary central incisor and to compare it between high angle and low angle patients undergoing orthodontic treatment. METHODOLOGY: This cross-sectional, observational study was conducted using lateral cephalometric radiographs of 61 class II division 1 patients (comprised 32 males, 29 females, age range 13 to 30 years) from the record files of patients inducted for Orthodontic management from June 2020 till August 2020 at the Department of Orthodontics, Sindh Institute of Oral Health Science, Jinnah Sindh Medical University, Karachi, Pakistan. The sample was divided on the basis of Vertical Analysis (angulation of mandibular plane) into high and low angle cases. Collum angle was measured using the angulation of the Maxillary Central Incisor (MCI). Student t-test was used to compare the mean difference of the collum angle between skeletal vertical malocclusions. RESULTS: Mean value of the collum angle for high angle (Vertical Growth pattern) cases were mean ± standard deviation (4.35°±1.49°) while for low angle groups (Horizontal Growth pattern) were (2.41°±1.60°). CONCLUSION: There Collum angle of permanent maxillary central incisors differ significantly (p<0.001) among high angle and Low angle malocclusions cases (n=61) and showed pronounced axial bending in Class II division 1 incisors with high angle (4.35° ± 1.49°) as compared to low angle malocclusion (2.41° ± 1.60°). KEYWORDS: Collum Angle, Maxillary Central Incisor, Orthodontic Treatment, High Angle, Low Angle.
43
Tauheed, Sanam, Attiya Shaikh, and Mubassar Fida. "Cervical Posture and Skeletal Malocclusions – Is there a Link?" Journal of College of Medical Sciences-Nepal 15, no. 1 (March 14, 2019): 5–9. http://dx.doi.org/10.3126/jcmsn.v15i1.20509.
Full textAbstract:
Background: The present study was conducted in order to determine cervical posture in different skeletal sagittal malocclusions as well as to assess whether a correlation existed between cervical posture and skeletal relationships. Methods: Cervical curvature and inclination of 63 subjects was assessed using their lateral cephalometric radiographs. Cervical inclination was assessed using the cervicohorizontal postural variables namely OPT/HOR and CVT/HOR whereas cervical curvature was determined by measuring the angle OPT/CVT. Sagittally, the subjects were also categorized into skeletal Class I, II and III based on the angle ANB. One way ANOVA was used for the comparison of cervical posture in different skeletal sagittal malocclusions. Pearson’s correlation was used to evaluate the correlation of cervical posture with different skeletal sagittal jaw relations. Statistical significance level was set at p≤0.05. Results: Statistically significant differences were found between the different skeletal malocclusions for the cervical curvature angle OPT/CVT (p=0.025). A weak correlation of cervical curvature angle OPT/CVT (r=0.305, p=0.016) with sagittal malocclusion was found. Conclusions: Skeletal sagittal malocclusions differ in their cervical postures, especially cervical curvature. Skeletal Class III subjects have significantly straighter cervical columns than skeletal Class I subjects. Cervical curvature is correlated with sagittal jaw relations.
Keywords: cervical curvature; cervical posture; skeletal sagittal malocclusions .
44
Starch-Jensen, Thomas, and Annette Dalgaard Kjellerup. "Anterior Mandibular Segmental Distraction Osteogenesis: A Case Report." Open Dentistry Journal 12, no. 1 (September 28, 2018): 623–30. http://dx.doi.org/10.2174/1745017901814010623.
Full textAbstract:
Introduction: Skeletal Angle Class I patients with a severe dental Class II malocclusion are characterized by an unfavourable anterior-posterior relationship between the anterior dentoalveolar area and the skeletal base. Orthodontic alignment posing various treatment difficulties and surgical correction with bilateral sagittal split osteotomy may result in a compromised facial profile. Hence, anterior mandibular segmental distraction osteogenesis has been proposed as an alternative treatment modality for solving facial esthetics, anterior tooth crowding and an unfavourable relationship between the anterior dentoalveolar area and the skeletal base in skeletal Angle Class I patients with a severe dental Class II malocclusion. Limited skeletal relapse with predictable soft tissue changes have been documented in long-term studies. Thus, anterior mandibular segmental distraction osteogenesis seems to be a valuable and predictable surgical method for correction of selected cases of skeletal Class I patients with a severe dental Class II malocclusion. Case report: The purpose of this case report is to present the treatment of a 57-year-old female with a skeletal Angle Class I relation and a severe dental Class II malocclusion. Anterior mandibular segmental distraction osteogenesis as well as discussing the current knowledge about this treatment modality. Conclusion: The present case report illustrates that establishment of a harmonious relationship between the maxillary and mandibular arch in patients with a skeletal Angle Class I relation and a severe dental Class II malocclusion using anterior mandibular segmental distraction osteogenesis seems to be a predictable and applicable surgical method for selected cases and General Dental Practitioners, orthodontics and maxillofacial surgeons must have knowledge of this treatment modality.
45
Souza, Paulo Ávila de. "Angle Class I malocclusion with anterior negative overjet." Dental Press Journal of Orthodontics 21, no. 2 (April 2016): 102–14. http://dx.doi.org/10.1590/2177-6709.21.2.102-114.bbo.
Full textAbstract:
ABSTRACT This clinical case report describes the orthodontic treatment of an 8-year and 9-month old female patient with Angle Class I malocclusion, anterior crossbite and canine Class III relationship. Orthodontic treatment was carried out in two stages. The first one was orthopedic, while the second one included the use of a fixed appliance and the need for space gain for reshaping of maxillary lateral incisors. The two-stage treatment combined with multidisciplinary Restorative Cosmetic Dentistry allowed excellent esthetic and functional outcomes to be achieved. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO) as a requirement for the title of certified by the BBO.
46
Sithole, Ntokozo P., Mohamed I. Khan, and Mosimane PS Sethusa. "Skeletal morphologic features of Anterior Open Bite Malocclusionamongst black patients visiting the Medunsa oral health centre." South African Dental Journal 75, no. 8 (September 30, 2020): 425–31. http://dx.doi.org/10.17159/2519-0105/2020/v75no8a2.
Full textAbstract:
INTRODUCTION: Anterior open bite (AOB) malocclusion presents as lack of vertical overlap of anterior teeth. It is viewed to be unaesthetic and may affect speech and mastication It develops due to the interaction of hereditary and environmental etiological factors and these usually affect the vertical growth of the face. This study describes the vertical changes of South African black people presenting with AOB. AIMS AND OBJECTIVES: The aim was to determine skeletal morphological features of patients with AOB malocclusion. DESIGN: The design was a retrospective, cross-sectional study. MATERIALS: Archived pre-treatment lateral cephalographs of 181 patients who consulted between 2007 and 2014 were divided into four groups: control group of 62 patients with skeletal Class I pattern without AOB; test groups of patients with AOB (119) divided into 35 Class I, 43 Class II, and 41 Class III malocclusions. Records of each group were divided according to gender. Descriptive statistics, the Pearson correlation coefficient, t-test and. Wilcoxon test were employed to analyze the data, and p values of <0.05 were considered statistically significant. RESULTS AND CONCLUSIONS: Patients with AOB had a larger vertical facial pattern in all classes of malocclusion. Males presented with larger Sn-GoGn angles than females. The PFH/AFH ratio was lower across all classes of malocclusion compared to the control group.
47
Alali, Osama Hasan. "Fixed Lingual Mandibular Growth Modificator: a new appliance for Class II correction." Dental Press Journal of Orthodontics 18, no. 4 (August 2013): 70–81. http://dx.doi.org/10.1590/s2176-94512013000400011.
Full textAbstract:
INTRODUCTION: This article demonstrates the description and use of a new appliance for Class II correction. MATERIAL AND METHODS: A case report of a 10-year 5 month-old girl who presented with a skeletally-based Class II division 1 malocclusion (ANB = 6.5º) on a slightly low-angle pattern, with ML-NSL angle of 30º and ML-NL angle of 22.5º. Overjet was increased (7 mm) and associated with a deep bite. RESULTS: Overjet and overbite reduction was undertaken with the new appliance, Fixed Lingual Mandibular Growth Modificator (FLMGM). CONCLUSION: FLMGM may be effective in stimulating the growth of the mandible and correcting skeletal Class II malocclusions. Clinicians can benefit from the unique clinical advantages that FLMGM provides, such as easy handling and full integration with bracketed appliance at any phase.
48
AlShahrani, Ibrahim, Ali A. Dawasaz, Sadatullah Syed, Mohammed Ibrahim, and Rafi A. Togoo. "Three-dimensional palatal anatomic characteristics' correlation with dermatoglyphic heterogeneity in Angle malocclusions." Angle Orthodontist 89, no. 4 (March 6, 2019): 643–50. http://dx.doi.org/10.2319/091718-675.1.
Full textAbstract:
ABSTRACTObjectives:To assess correlation of dermatoglyphic (DG) pattern with quantitative palatal anatomic parameters measured using three-dimensional (3D) scanning of dental casts and to explore the possibility of utilizing these to predict future occurrence of malocclusion.Materials and Methods:Pretreatment casts of 477 Saudi Arabian patients were divided into Class I, II, and III malocclusion groups. Fingerprints were recorded for all hand digits using a digital biometric device. Maxillary arch analysis was accomplished including intercanine, intermolar distance, palatal height, and palatal area. The results were statistically analyzed.Results:The mean surface area of the palate was highest in Class II malocclusion. The DG pattern was not significantly associated with the type of malocclusion, except in the instance of the double loop characteristic (P = .05). There was a strong correlation, however, between DG characteristics like simple arch, loop, and double loop and palatal dimensions (intercanine, intermolar distance, and palatal height). Heterogeneity of DG pattern could be reliably used to predict palatal dimensions. Logistic regression revealed that only tented arch, symmetrical, spiral DG patterns and palatal area were significant but weak predictors of Angle malocclusion (P < .05).Conclusions:A novel correlation of DG pattern with 3D palatal anatomic characteristics was assessed in different Angle malocclusion classes. Few of the DG characteristics and palatal dimensions showed significant correlations. However, only some of these were significant predictors of Angle malocclusion.
49
Basukala, Dharma Laxmi. "Multiloop Edgewise Arch-wire Technique for Skeletal Class III Openbite: A Case Report." Orthodontic Journal of Nepal 7, no. 2 (June 8, 2018): 56–59. http://dx.doi.org/10.3126/ojn.v7i2.20169.
Full textAbstract:
Skeletal Class III with openbite is one of the most difficult malocclusion to treat orthodontically. Generally, the morphological characteristics of this malocclusion are poor antero-posterior growth of the maxilla or excessive growth of the mandible with high angle. An 18-year-old male had Class III malocclusion with retrognathic maxilla and normal mandible with high angle. All third molars except on fourth quadrant were extracted to eliminate the posterior crowding. Multiloop Edgewise Arch-wire (MEAW) technique was used to upright the mesially inclined buccal teeth and to correct occlusal plane. In nine month time, anterior cross bite and open bite were corrected; normal overjet, overbite and Class I canine relation were achieved.
50
Khalid, Ahsan, Zubair Hassan Awaisi, Muhammad Anas Sufian, Zainab Ahmed, Sameera Jamshed, and Umal Asim. "Frequency of Extractions in Various Skeletal Patterns in Orthodontic Nishtar Institute of Dentistry, Multan." Orthodontic Journal of Nepal 10, no. 3 (December 31, 2020): 27–30. http://dx.doi.org/10.3126/ojn.v10i3.35488.
Full textAbstract:
Introduction: When the 20th century started Orthodontics was first recognized as a science. The removal or extraction of teeth destroys the ideal esthetics and occlusion, which was the base of orthodontic treatment plans. Edward Hartley Angle and his followers were not supporters of extraction due to this reason. Extreme dental or maxillary protrusion leading to facial deformities could be corrected by dental extraction was supported by Calvin Case who was a strong opponent of the Angle., for mainly analyzing the frequency of use of orthodontic extractions after evaluating the changes in the use of extraction in past years. The frequency of extractions was examined in relation to gender and Angle’s malocclusion classification.
Materials and Method: This is a retrospective observational study. It was conducted in Orthodontics Department of Nishtar Institute of Dentistry, from 2015 to 2020. In this study records from 1032 patients who reported to orthodontic department in Nishtar institute of dentistry Multan for fixed orthodontic treatment were taken. For data registration SPSS 20 (IBM Chicago Illinois) was used. Frequency of extractions with regards to gender, skeletal pattern and types of extraction pattern was determined. In order to assess the association among variables Chi square test was applied and a P value of less than 0.05 was considered as significant.
Result: In respect of extraction group, 222 (41.3%) were males and 316 (58.7%) were female and whereas in nonextraction group, 83 (16.8%) were males and 411 (83.2%) were females. The difference was statistically significant (p<0.001). The frequency of extraction in reference to Angle’s classification was analyzed, and no significant difference was found (p=0.992). Frequency of extraction was highest in class-II division-I malocclusion, and the lowest frequency of orthodontic tooth extraction was seen in class-II division-II malocclusion.
Conclusion: It can be concluded from the results of our study that females had higher frequency of extractions as compared to males. Similarly, class II malocclusion patients had highest frequency while lowest frequency was in Class I malocclusions.