Malocclusion prevalence in an ethnic Chinese population (original) (raw)
Related papers
2017
Objective: To determine the distribution of dental malocclusions in a sample of North-East China orthodontic patients. Methodology : Between Jun 2014 to Jun 2016 the orthodontic record of 300 patients attending the Department of Orthodontics at School of Stomatology, Second Affiliated Dental Hospital of Jiamusi University were selected randomly from 1000 patients and retrieved from the archives for evaluation. The data was entered into the computer and analyzed using the Statistical Package for Social Sciences (version 20. Inc. Chicago, USA). Results: Angle’s Class II malocclusion was found to be the most common malocclusion with 44% followed by 29.7%, Angle’s class I and 26.3%. Angle’s class III. Conclusion: The results give a pattern of malocclusion in orthodontic patients and may provide a base line data for planning awareness programs, preventive and interceptive orthodontic services & the future studies. There is a strong need of epidemiological survey to find out the prevalenc...
Prevalence of Dental Malocclusions in Different Geographical Areas: Scoping Review
Dentistry Journal, 2021
The World Health Organization (WHO) considers malocclusion one of the most important oral health problems, after caries and periodontal disease. Its prevalence is highly variable and is estimated to be between 39% and 93% in children and adolescents. Due to the importance of malocclusions in dentistry, the aim of our review is to assess the frequency of malocclusions among different geographical regions. A literature research was performed through the Pubmed, Medline, Scopus, Web of Science, LILACS, Open Grey and Cochrane Library databases. The “PRISMA” guidelines were used for the following review. Fourteen studies were analysed for this review. Class I was found most frequently, followed by class II and finally class III. Considering the other anomalies, crowding was one of the most frequent with a prevalence of up to 84%, followed by spacing, which reached a frequency of 60%. Prevalence of crossbite and openbite was quite variable, while the evaluation of deepbite revealed more u...
Global distribution of malocclusion traits: A systematic review
Dental Press Journal of Orthodontics, 2018
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.
Journal of Orthodontic Science, 2015
Objectives: The objective was to compare dentofacial characteristics of Class I malocclusion in Saudi and Japanese adult females. Materials and Methods: Lateral cephalograms of 50 Saudi adult female and 50 Japanese adult female (18-35-year-old) were obtained. All patients were skeletal Class I, angle Class I malocclusion, arch length discrepancy (−10-10 mm), overjet (1-5 mm), overbite (1-5 mm), absence of congenital anomalies, or significant facial asymmetries or congenitally missing tooth other than the 3 rd molar and absence of temporomandibular joint problems. Patient cephalograms were traced and digitized. 16 angular measurements and 13 linear measurements of facial form were used. Results: A comparison of the vertical dimension showed that the Saudi females had a significantly larger gonial angle, a significantly larger facial angle and longer lower face height compared to the Japanese females. Dentally, Saudi females had more protruded incisors with increased distances of the posterior teeth to the palatal plane. For the soft tissue dimension, the Saudi subjects had a significantly more prominent nose, retruded lip and a more protruded chin compared with Japanese. Conclusions: There were significant differences in dentofacial morphology between Saudi and Japanese adult females. Both Asian countries have distinct cephalometric features, which should be considered as a reference in treating patients of varying ethnic backgrounds to optimize the final results.
International Journal of Dental Clinics, 2011
Backg round: The prevalence and severity of malocclusion among the school children in Nalgonda district was not documented till date. Aims and Ob jectives: To co mpare the prevalence and severity of malocclusion between the rural and urban children. Settings and study design: A cross sectional study was conducted among the 15 year o ld school child ren, fro m 20 rural and 10 urban schools of Nalgonda district, Andhra Pradesh. Materials and methods: The schools were selected by simple rando m sampling technique. The oral examination was done by three dentists using sterile, mouth mirror and W H O probe on a foldable chair under natural daylight. Dental Aesthetic Index was used for assessing the severity of malocclusion along with a data collection sheet that had the demographic details as well as other relevant informat ion. The data analysis was done using SPSS version 16. Results: A total of 1794 children (961 male and 833 female) were considered for the study. The prevalence of definite, severe and very severe malocclusion was more among females (21.8%) than males (13.2%) and more in urban (20.8%) than in rural areas (14.9%). The mean DAI score was also high among males (20.89±5.11) co mpared to females (22. 54±6.31), more in urban (22.10±5.84) than rural areas (21.33± 5.68). Conclusion: The prevalence and severity of malocclusion was more in urban than rural areas, more among female children than their male counterparts.
South European Journal of Orthodontics and Dentofacial Research, 2017
Malocclusion presents aesthetically and functionally nonacceptable occlusion and it is defined as an irregularity of the teeth or a malrelationship of the dental arches beyond the range of what is accepted as normal. 1 Malocclusion is a manifestation of normal biological variability, ranging from an ideal occlusion to considerable deviation from normal. 2 The World Health Organization (1987), had included malocclusion under the heading of Handicapping Dento Facial Anomaly, defined as an anomaly which causes disfigurement or which impedes function, and requiring treatment "if the disfigurement or functional defect was likely to be an obstacle to the patient's physical or emotional well-being". 3 Even though malocclusions do not present life-threatening conditions, or cause temporomandibular disorder or postural problems, 4-6 their high prevalence puts them in focus of public healthcare. 7 Malocclusions are a result of orofacial adaptation to various etiological factors. Maloccluded teeth can cause psychosocial problems related to impaired dentofacial aesthetics and disturbances of oral function, such as mastication, swallowing, speech and greater susceptibility to trauma and periodontal disease. More important implications of malocclusion in everyday life are psychosocial problems caused by disturbed dentofacial esthetics, which demonstrates a sizable problem considering today's trends of imposed standards of beauty. 8
APOS Trends in Orthodontics, 2018
Tooth size, occlusal traits, and ethnicity are closely interrelated, and their impact on desirable orthodontic treatment outcome cannot be underestimated. This study was undertaken to assess the occlusal characteristics and ethnic variations in occlusion of Malaysian orthodontic patients and evaluate their correlation with Bolton’s tooth size discrepancy. Materials and Methods: On 112 pretreatment study models of orthodontic patients, molar relationship, overjet, overbite, spacing, crowding, midline shift, and Bolton’s ratios were assessed. ANOVA, one‐sample t‐test, Chi‐squared test, and Spearman’s rho correlation coefficient were used for statistical analysis. Results: Significant difference between anterior ratio of our study and Bolton’s ideal values was found, for the entire study sample and Chinese ethnic group. Differences between races and malocclusion groups were not statistically significant (P > 0.05). Significant correlations were found as follows – in Angle’s Class I malocclusion between 1) anterior ratio and overbite, 2) overall ratio and maxillary crowding and spacing; in Angle’s Class II malocclusion between 1) anterior ratio and overjet and midline shift, 2) overall ratio and mandibular crowding; in Angle’s Class III malocclusion between 1) anterior ratio and mandibular crowding and both maxillary and mandibular spacing 2) overall ratio and mandibular crowding. Conclusions: Significant differences in anterior ratio and Bolton’s ideal values for the Malaysian population were found, indicating variations in anterior tooth size as compared to Caucasians. Statistically significant correlations existed between Bolton’s ratios and occlusal traits. These findings can be applied clinically in diagnosis and treatment planning by keeping in mind the specific discrepancies that can occur in certain malocclusions and addressing them accordingly.
Occlusal variation in chinese immigrants to the United Kingdom and their off-spring
Archives of Oral Biology, 1984
Occlusal variations of immigrant Chinese parents, raised in less developed areas, were compared wit!n their children who were born and bred in the United Kingdom. Of 11 occlusal traits, nine were significantly more variable or less well developed in the offspring. Because genetic factors were unchanged, the deterioration in occlusion in the offspring indicates environmental influences such as dietary consistency, premature deciduous tooth loss from caries and oral respiration.