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Accuracy of digital and film panoramic radiographs for assessment of position and morphology of mandibular third molars and prevalence of dental anomalies and pathologies.
OBJECTIVES: To compare the accuracy of digital and film panoramic radiographs for determining (1) the position and morphology of mandibular third molars before surgical removal and (2) the prevalence of dental anomalies and pathologies. METHODS: Three hundred and eighty-eight third mandibular molars were available for examination. Position and morphology of third molars observed on film radiographs and on digital panoramic images from five systems (DenOptix, DigiDent, Digora, Dimax2 and Orthophos Plus) were recorded by two observers and were compared with surgeons' findings at the time of the operation (gold standard). One observer further recorded the prevalence of dental anomalies and pathologies on both imaging modalities. RESULTS: Few differences were found between the digital and film-based panoramic systems in the assessment of accuracy of position and morphology of mandibular third molars. The prevalence of dental anomalies and pathologies determined with the two modalities was roughly similar. CONCLUSION: The five digital panoramic systems evaluated in this study were equally as useful for third molar treatment planning and diagnosis of dental anomalies and pathologies as conventional film-based panoramic radiographs.
Prevalence of tooth transpositions and associated dental anomalies in a Turkish population.
OBJECTIVES: The aims of this study were to determine the prevalence of tooth transposition in a Turkish population, possibly associated dental anomalies and whether side laterality, gender expression or genetic influence exist or not. METHODS: Panoramic radiographs of 5486 patients referred to Department of Oral Diagnosis and Radiology, University of Suleyman Demirel between April 2003 and March 2004 were examined retrospectively. All patients with tooth transpositions were recalled for detailed clinical examination and medical history. Age, sex, history (trauma), location of transposition, and associated congenital dental anomalies were recorded with details. RESULTS: 22 transpositions were found in 21 of 5486 (0.38%) patients. The most frequently seen transposition was maxillary canine-lateral incisor (1.64/1000), secondly maxillary canine-first premolar (0.91/1000) and maxillary canine-second premolar (0.18/1000) was the least frequently seen one. The frequencies of right and left side occurrence were equal (11/11). Each sex was affected similarly (11 males, 10 females). CONCLUSIONS: The prevalence of tooth transposition was 0.38% in a Turkish population. Maxillary canine-lateral incisor transposition was found to have a higher frequency than maxillary canine-first premolar transposition. Maxillary canine-second premolar transposition that had not been previously reported in the literature was observed in one of our cases. Transpositions had similar frequencies in both sexes.
Otolaryngological disorders in craniometaphyseal dysplasia.
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Clinical variants in tooth number and crown form: a report of bilateral double teeth associated with a talon cusp.
The aetiological factors related to many dental anomalies are still uncertain. Clinical descriptive terms may be useful in communications. This paper describes a previously unreported case of dental anomaly exhibited as bilateral double teeth associated with a talon cusp. The clinical variants related to crown numbers and forms are also discussed.
Modern restorative management of patients with congenitally missing teeth: 1. Introduction, terminology and epidemiology.
The management of patients with congenitally missing teeth can be a challenge and, in many cases, requires multidisciplinary care. In this four-part series, a contemporary approach to managing this group of patients is discussed. This first paper examines the terminology, epidemiology and restorative challenges that such patients can exhibit.
An efficient, nontraumatic posterior occlusion.
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CARIES EXPERIENCE OF CHILDREN ONE TO SIX YEARS OLD IN TWO OREGON COMMUNITIES (CORVALLIS AND ALBANY). I. EFFECT OF FLUORIDE ON CARIES EXPERIENCE AND ERUPTION OF TEETH.
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Individual bilateral megadontism: report of case.
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Hypophosphatasia: review and report of case.
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Prevalence of delayed emergence of permanent teeth as a result of local factors.
Delayed emergence of permanent teeth as a result of local etiologic factors was found in 45 of 1,032(4.3%) persons ages 8 through 18 in a dentally indigent population. In 36 persons (3.4%) delayed emergence resulted from causes other than those associated with premature primary molar extraction. This statistic probably approximates the potential for this problem in a treated population group. Teeth most commonly involved were mandibular second premolars, maxillary canines, and maxillary central incisors. The most common causes, respectively, were space loss, palatal position, and mesiodens. Supernumerary, malformed, and congenitally missing teeth were more frequent in persons with delayed emergence than in the rest of the population sampled. The difference was statistically significant. No correlation was found between delayed emergence and sex of the patient. In this study, teeth delayed in emergence behaved as other teeth in that they exhibited normal root development and did not contribute to resorption of adjacent roots. Except for maxillary canines, enlarged follicular spaces did not develop after eruption
Avoiding perforation during endodontic access.
Planning for endodontic access should be as precise as possible and the dentist should consider several factors in his preoperative evaluation of teeth to avoid perforations. Anatomical characteristics of teeth can be helpful in establishing endodontic access, and valid and invalid points for orientation have been discussed. Seven suggestions have been offered for the establishment of access on difficult teeth. The ideal in establishing endodontic access can only be achieved by the deliberate, conscious application of a thorough knowledge of dental anatomy, and of possible variations from the norm, coupled with a thorough preoperative examination of the tooth. Although a casual approach may not be unsuccessful, precision will certainly yield a higher percentage of successful cases.
Developmental variations of tooth morphology and periodontal disease.
Some developmental variations of tooth morphology may influence the potential for periodontal disease by allowing accumulation of bacterial plaque and calcified deposits. Mechanical plaque control becomes difficult even for the conscientious patient. Periodontal disease may be hastened in these cases. The therapist must be aware of these variations and their significance in the etiology of isolated periodontal lesions. Recognition of these anomalies and early diagnosis may improve the prognosis of the involved tooth.
Fused teeth: a multidisciplinary approach to treatment.
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Surgical correction of an unerupted tooth.
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The St. Regis environmental health issue: assessment of dental defects.
A descriptive epidemiologic study was undertaken to determine the nature, extent, and severity of defects of the dentition alleged to be fluorosis in Native American children. An examination of 520 Native American children living on the St. Regis Reservation, and 248 non-Native American children living in adjacent areas, disclosed a much higher prevalence of generalized pigmentation of the dentition in the former (114, 22%) as compared with the latter group (13, 5.2%). The pattern of enamel pigmentation, opacity, and hypoplasia observed was not typical of fluorosis. After careful consideration of various etiologic factors, use of the antibiotic tetracycline was determined to be the probable causative agent in 112 (21.5%) cases, of which 73 (14%) were classified as esthetically objectionable according to the tetracycline severity index devised. Confirmation of incorporation of the drug into the teeth was made possible in selected cases by histopathologic analysis of extracted teeth.
Treatment of triple tooth: report of case.
A case of a young girl with a triple primary tooth that retarded normal development of the maxillary left lateral incisor is described. The primary tooth was extracted to encourage normal development of the permanent tooth. Subsequent examination of the extracted triple tooth suggests that it was composed of the primary left lateral incisor fused either to a geminated central incisor or to a fused central incisor and supernumerary tooth.