An orthopantomographic study of prevalence of impacted teeth

Department of Oral Surgery, Institute of Dentistry, University of Turku, Turku, Finland
International Journal of Oral Surgery 02/1972; 1(3):117-20. DOI: 10.1016/S0300-9785(72)80001-2
Source: PubMed

ABSTRACT Orthopantomograms of a total of 4,063 individuals were included in the study and were taken from patients of the Institute of Dentistry, University of Turku. Impacted teeth were found in 14.1% of the patients. The teeth most frequently impacted were the third molars, 76.1%, and of these, no difference between the maxilla and mandible was observed. No difference in sex in the prevalence of third molars was observed. The prevalence of impacted maxillary cuspids was higher in females than in males. When the prevalence of the third molars in different age-groups was studied, a decrease was found with an increase in age. The prevalence of impacted cuspids was approximately the same in different age-groups.

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    • "Impaction of a permanent tooth is a relatively common clinical occurrence that may involve any tooth in the human dentition. Most commonly it involves the mandibular and maxillary third molars, the maxillary canines or central incisors and the mandibular second premolars [1] [2]. A tooth is impacted when it fails to erupt due to an obstacle such as the presence of a supernumerary tooth or an odontoma, lack of adequate space in the arch, an abnormal eruption path, or with no apparent etiology (idiopatic) [3]. "
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    ABSTRACT: To determine the prevalence of mandibular second molar impaction in orthodontic patients of two ethnic groups, present treatment options and discuss their outcome. 6500 panoramic radiographs of orthodontically treated patients (3500 Israeli and 3000 of Chinese-American origin) aged 11-15 years were examined for mandibular second molar impactions. 120 patients with 165 impacted mandibular second molars were identified, presenting a prevalence of 1.8%. Many (88%) were mesially angulated. Impactions were more prevalent in the Chinese-American group than in the Israeli group (59% and 41%, respectively). Sequential treatment options are presented and discussed, and the outcomes of several treatments are presented. A prevalence of 1.8% for MM2 impactions was detected in our sample. Clinicians should be aware of the possible impaction of mandibular permanent second molars. Early detection and initiating of orthodontic intervention directed toward correction of the impaction are recommended for best clinical results and long-term prognosis.
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    • "Various studies have reported a relationship between mandibular third molar impactions and gender; however the results have not been consistent (Bjork et al; 1956, Pindborg 1970, Dachi and Howell 1961, Venta et al; 1991, and Hattab et a;, 1999). Dachi and Howell (1961), Hattab et al; (1999), Venta et al; (1991), and Aitasalo et al; (1972) reported no difference in the prevalence rate of impacted third molars between males and females. "
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    ABSTRACT: It is common practice to remove impacted mandibular third molars due to pathology associated with these impactions. Alternatively, impactions can be treated conservatively through a closely guarded follow-up regiment. However, many symptoms associated with impacted third molars may be prevented by elective removal of potentially problematic teeth. To determine the risk of developing pathology associated with impacted mandibular third molars, a ransom sample of 200 pantomographs were analyzed displaying 324 impactions from patients who presented for treatment at the Maxillo-Facial and Oral Surgery Department, Faculty of Dentistry, University of the Western Cape.
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    ABSTRACT: The relationship between malocclusion and the health of the masticatory apparatus is reviewed. While there is evidence that certain features such as traumatic deep overbite, unprotected incisors and impacted teeth may adversely affect the longevity of the dentition, the relationship of dental irregularity to periodontal disease, caries and mandibular dysfunction is less certain. Studies in the Held of social psychology indicate that an unattractive physical appearance may evoke an unfavourable social response in many facets of social interaction but the place of dentofacial anomalies in this context has not been satisfactorily assessed. The individual's adjustment to his own imperfections in dental alignment is variable and there is no evidence that children with visible irregularities will in general be emotionally handicapped. Effectiveness studies have yet to be undertaken but the factors which will have to be taken into account in assessing the benefits of orthodontic treatment are the definition of treatment need, treatment standards, the disadvantages of treatment and the influence of other determinants of dental health. The need for further research is underlined.
    Community Dentistry And Oral Epidemiology 01/1980; 8(1):36 - 45. DOI:10.1111/j.1600-0528.1980.tb01252.x · 1.94 Impact Factor
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