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Results for “Tooth Abnormalities”

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At least 469 records · Page 26Linked to original sources
PubMed2006

Severe trauma in the primary dentition--diagnosis and treatment of sequelae in permanent dentition.

A 2-year 6-month male presented after an intrusive injury sustained at 15 months of age. Intra-oral radiographs showed coronal dilaceration of the germ of the permanent central incisor and the presence of a calcified tissue mass in the area of the trauma which was identified after surgical removal as the permanent upper left lateral incisor. Immediate treatment and long-term options are discussed.

Child, Preschool↗
PubMed2004

Comparative morphological analysis of the root developmental groove with the palato-gingival groove.

The palato-gingival groove is an anomaly of shape that modifies dental tissues organization while the developmental root groove is described within normal root anatomy. The morphology of dental tissues in relation to the presence of the developmental root groove has not been properly described. This study analyzed microscopically the morphology of dental tissues related to the root developmental groove comparing it with that presented on teeth affected by palato-gingival groove. Many similarities were observed such as the increased cementum thickness, decreased dentin thickness, pulp compartment surface alteration, irregularity of the dentin-cementum junction and of the cementum surface. These results suggest a common determining factor to this structure organization pattern. It is possible that the palato-gingival groove could be the result of an alteration of genetic mechanisms, rather than a dental germ folding, determined by privation of space, as previously hypothesized.

Dental Cementum↗
PubMed2004

Bone structure effect on root resorption.

OBJECTIVES: To explore if alveolar bone shape and density might promote external apical root resorption. SETTING AND SAMPLE POPULATION: Panoramic radiographs of 700 patients who had orthodontic treatment at Temple University were reviewed and 22 patients with radiographic evidence of root resorption on the lower incisors were selected for the study. Exclusion criteria included a history of systemic diseases, craniofacial abnormalities, tooth injury, endodontically treated teeth, and impacted teeth. METHODS: Pre-treatment (T1) and post-treatment (T2) cephalometric radiographs were converted into digital format and enhanced to reduce contrast variability and improve edge definition. Tooth length, root length, root area, alveolar area around the root including cortical area, area of medullary bone, and area of the symphysis were measured using an interactive software algorithm. A region of interest within the symphysis was also defined and trabecular space area and fractal dimension calculated as an estimate of bone density. RESULTS: Root area and tooth length were correlated negatively with changes in root area, tooth area, and root length. Larger teeth demonstrated a greater amount of root resorption. Dentoalveolar complex dimensions remained relatively unchanged during tooth movement. The amount of alveolar bone around the root, thickness of cortical bone, density of the trabecular network, and fractal dimension showed no significant correlation with the extent of the external apical root resorption. CONCLUSIONS: The results of this study suggest that the density and morphology of the dentoalveolar complex are not significant factors in the etiology of external apical root resorption.

Adolescent↗
PubMed2006

Microdontia after chemotherapy in a child treated for neuroblastoma.

OBJECTIVE: Chemotherapy used on paediatric oncology patients often causes disturbances in dental development. Aim of this case report is to present the late effects of chemotherapy on dental development in a patient treated for neuroblastoma at early age. DESIGN: Case report. RESULTS: This paper presents a female patient treated at early age with surgery and chemotherapy for a neuroblastoma (stage IVS) in the right thorax and massive liver metastases. The examination of the patient at age 11.7 years showed microdontia of six teeth. In three of them size and form of the crown were affected, while in the other three the size was reduced but the form was not affected. CONCLUSIONS: Chemotherapy on children treated for neuroblastoma can adversely influence tooth development. This has to be taken into consideration by the dentist when monitoring the development of the dentition and occlusion.

Antineoplastic Agents↗
PubMed2005

[Skin and teeth].

Explore the source record for details and available documents.

Epidermolysis Bullosa, Junctional↗
PubMed1976

III. dental development from birth to 16 years.

Tooth eruption in 212 randomly selected Swedish urban children has been investigated from birth to 16 years as part of a prospective longitudinal study of growth and development. The ages and the order of eruption of the deciduous and permanent teeth were in agreement with those reported in other contemporary studies. The good agreement with another longitudinal study of the tooth eruption of Swedish children born during the same period is an indication that the present sample was representative of contemporary Swedish children. In the deciduous dentition a probable male advancement was found, while girls were consistently the advanced sex as regards the eruption of permanent teeth. Sex differences have also been found in the relation between dental development and other criteria of somatic growth and development. The correlations were low or moderate with, in general, higher values for girls than boys. A positive association with somatic growth was observed both for the deciduous and the permanent dentition but with intriguing sex differences for various body measurements.

Adolescent↗
PubMed2000

A rare occurrence: a bi-rooted upper canine.

A rare dental anomaly of a bi-rooted upper canine with a necrotic pulp was treated endodontically. The operator must always be alert for any variations in dental anatomy that can occur from time to time.

Cuspid↗
PubMed2004

Unusual maxillary lateral incisors: case reports.

Root canal morphology is often complex and the number of root canals may vary for any type of tooth. Abnormalities in the root canal morphology of maxillary lateral inciors are rare. Maxillary lateral incisors can have two root canals, even though the dental literature supports their 100% single-canal anatomy. It is vital to consider the possibility of extra root canal(s), even in teeth with a low frequency of abnormal root canal anatomy. This report presents two cases of maxillary lateral incisors with two root canals.

Adult↗
PubMedDate not supplied

Prevalence of numeric anomalies in the permanent dentition of patients with Down syndrome.

The purpose of this study was to evaluate the prevalence of numeric anomalies in the permanent dentition of patients with Down syndrome by means of panoramic radiographs. The sample consisted of panoramic radiographs from 70 subjects. We examined the radiographs to detect hypodontia as well as supernumerary teeth. Our results confirm the high prevalence of hypodontia among patients with Down syndrome (60%), mostly with mild expression. The teeth most often missing were the upper lateral incisors, usually bilaterally, followed by the lower second premolars and upper second premolars. Supernumerary teeth were seen in 6% of the subjects, and the concomitant occurrence of hypodontia and supernumerary teeth occurred in one patient.

Adolescent↗
PubMed1989

Fusion of maxillary third and supernumerary fourth molars. Case report.

Fusion of teeth is most commonly reported in the deciduous dentition, particularly in the anterior teeth. Recently, additional cases of fusion have also been reported in the mandibular molars of the permanent dentition, and are not considered uncommon. However, reports of the involvement of maxillary molars appear to be particularly rare in the literature. This case is another example of the quite rare phenomenon of fusion of maxillary third and supernumerary fourth molars.

Adult↗
PubMed1990

Structural and radiographic evaluation of four cases of tooth fusion.

Four cases of tooth fusion are presented. Three of the patients were female and one male. Radiographic examination revealed union of calcified tissues with discrete root canals and a common pulp chamber in Case 3 and the converse in Case 4. The finding of fused mandibular incisors and canines in both the deciduous and permanent dentitions is described in Case 1, while in two others unilateral fused tooth masses are described which are not repeated in the permanent dentition. The dentist should be aware of the possibility of finding fused teeth on routine dental inspection and once diagnosed the patient should be informed of the potential hazards as regards plaque accumulation and varied root canal morphology.

Adult↗