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At least 307 records · Page 17Linked to original sources
PubMed2005

Radiolucent lesion of an unerupted mandibular molar.

A coronal radiolucent lesion of an unerupted and partially developed mandibular second molar was coincidentally found during a routine radiographic orthodontic examination of a generally healthy 9-year old girl. The size of the lesion increased continuously during a 2-year observation period. Histologic examination after extracting the tooth proved the lesion to be an idiopathic external coronal resorption. In a review of the literature, we found no original research on the subject. However, the number of case reports suggests that idiopathic external coronal resorptions are quite common in young patients. Their etiology, however, remains unclear. The case history, histologic findings, differential diagnoses, and possible treatment approaches suggested in the literature are described.

Child↗
PubMed2000

Influence of additional acid etch treatment on resin cement dentin infiltration.

PURPOSE: The purpose of this study was to compare the penetration of a resin cement into dentin surfaces pretreated with self-etching primer with or without conventional acid etch. MATERIALS AND METHODS: Dentin surfaces of 8 unerupted human third molars were treated with self-etch primer (Panavia 21; Kuraray Co, Ltd, Osaka, Japan) with or without conventional acid etch treatment. A resin cement (Panavia 21) was applied according to manufacturer's instructions. Dentin/resin cement interface sections from each tooth were examined with light microscopy and scanning electron microscopy. In the light microscopy sections, exposed protein at the dentin/cement interface was stained a distinct red with Goldner's trichrome. RESULTS: The resin cement did not penetrate the depth of the zone of demineralized dentin when the self-etch primer was used in combination with conventional acid etch treatment. Inadequate resin cement penetration leaves a substantial area of exposed protein at the dentin/cement interface. In contrast, there was complete resin cement diffusion throughout the demineralized dentin when the self-etch primer was used without acid etching. CONCLUSIONS: Combining conventional acid etch treatment with a self-etching primer/resin cement system resulted in incomplete resin cement penetration and exposed protein at the dentin/cement interface.

Acid Etching, Dental↗
PubMed2004

A compound composite odontoma associated with unerupted permanent incisor--a case report.

Odontomas are the most common type of odontogenic tumors and generally they are asymptomatic. Frequently it may interfere with the eruption of the teeth. This is a case report of a compound composite odontoma in a 9 year old girl, which results in failure of eruption of the permanent upper right central incisor while the contralateral tooth had erupted. A calcified mass was seen in the radiograph and was provisionally diagnosed as odontoma following which the odontoma was enucleated. Routine follow up was done for more than a year and no recurrence was seen. This case report indicates that early diagnosis and management ensures better prognosis.

Child↗
PubMed1996

Prediction of coronal size of third molars by factor and multiple regression analyses.

Factor analysis and multiple regression analysis were made to establish a method for the prediction of the unerupted third molar size. The samples were dental casts of 138 adults (69 women and 69 men) who had all their teeth from the central incisor to the third molar, at least in one side of each maxillary and mandibular dentition. Mesiodistal and buccolingual tooth crown sizes were measured with sliding calipers. Five factors were selected from the factor analysis on the tooth crown sizes. Multiple regression analysis with the third molar as the dependent variable was carried out. Independent variables were selected on the basis of the factors obtained from the factor analysis. Two kinds of multiple regression equations were obtained (the first molar was used as an independent variable in one equation and the second molar was used in the other). The accuracy of the prediction was highest when the lateral incisor, the second premolar, and the second molar were used as independent variables in the maxillary dentition, and the central incisor, the first premolar, and the second molar in the mandibular dentition. The mean of the absolute values of the differences between the predicted values and the actual values was 0.5 mm in the maxillary third molar, and 0.42 mm in the mandibular third molar.

Adult↗
PubMed2005

A case of an unerupted maxillary central incisor for indirect trauma localized horizontally on the anterior nasal spine.

The present paper emphasizes the importance of early diagnosis of retarded eruption because of trauma and the plan for the surgical management of impacted teeth. The permanent incisor was localized horizontally on the nasal spine and the roots seemed to be in a retarded stage of formation beside of contralateral tooth. The treatment plan consisted in the valuation of the necessity of space to move the impacted incisor in the normal position and the biomechanical approach for the anchorage.

Child↗
PubMed2005

[Unerupted lower third molar as a cause of acute infection in soldiers].

BACKGROUND/AIM: To record the frequency of infections as complications accompanying the unerupted lower third molars and to determine if there was a significant level of the relationship between the frequency and the severity of infections and the age of patients. METHODS: This study included 100 soldiers of the Army of Serbia & Montenegro, with the unerupted third molars, of male sex, 18 to 25 years old, who were receiving clinical treatment. RESULTS: In 73% of the patients the infection was caused with the unerupted lower third molars. The highest frequency of infection was observed in the group of 20-23 years of age (75.3%). Mild infection occurred in 49 (67.1%) of the patients. CONCLUSION: The frequency of infection was significantly higher in the older patients. Because of the high frequency of the infection recorded, the unerupted lower third molars should be surgically removed before the age of 20.

Acute Disease↗
PubMedDate not supplied

Histology of fissures in human unerupted teeth.

An investigation into the contents of the fissures of unerupted teeth was made using light and scanning electron microscopy techniques. For this study, 193 unerupted teeth were used. The presence of ameloblasts in the fissures was substantiated, and their role in forming the fissure is discussed.

Ameloblasts↗
PubMed1977

An analysis of three mixed dentition analyses.

The accuracy of prediction of three mixed dentition analyses was compared. Hixon and Oldfather's method was found to be the most accurate. A simplified version of the analysis obviates referral to a table, allowing assessment of the size of the unerupted teeth prior to eruption of the lateral incisor.

Bicuspid↗
PubMed1985

Root resorption: the aggressive, unerupted second premolar.

Three cases of first molar root resorption, due to impacted maxillary and mandibular second premolars, presented over a period of 5 months. It is suggested that this may not be such an uncommon occurrence as is generally believed. The clinical situations in which the unerupted second premolar may start resorbing first molar roots are described and methods of identifying and treating this problem suggested.

Adolescent↗
PubMed1997

Pre-eruptive coronal radiolucency in a mandibular premolar: a case report and literature review.

This report describes a coronal radiolucency in an unerupted mandibular premolar. This anomaly, which most frequently involves the mandibular second molars, has been variously attributed to dental caries, dentine hypoplasia, inclusions of uncalcified enamel matrix, and resorption. The present instance was considered to be due to external resorption. Because these lesions may enlarge rapidly, frequent radiographic monitoring of an affected tooth is recommended. Early restorative treatment has been shown to be successful even in affected teeth with small pulp exposures.

Adolescent↗
PubMed1996

Two dentigerous cysts in the mandible of one patient. Case report.

This paper reports a case of two separate dentigerous cysts in the mandible of one patient. An unusual feature was the relationship of one of the cysts to an unerupted lateral incisor. The prudence of accounting for any missing teeth in patients and the value of panoramic radiographic screening is illustrated.

Adult↗
PubMed2003

Marsupialization of a large unilateral mandibular dentigerous cyst in a 6-year-old boy--a case report.

This paper describes the case of a 6-year-old boy who presented with an asymptomatic large unilateral dentigerous cyst related to an unerupted 6. It was marsupialized under general anaesthetic, and subsequently resolved rapidly. The pathogenesis and aetiology of dentigerous cysts is discussed, together with alternative treatment modalities. This paper illustrates that a conservative surgical approach to the management of a dentigerous cyst in a child can be very successful. By preserving the associated permanent tooth, marsupialization minimizes any disruption to future dental development.

Child↗
PubMed1992

Odontogenic lesions in opercula of permanent molars delayed in eruption.

Opercula of permanent first and second molars delayed in eruption were investigated histologically to detect possible causes of eruption failure. The material comprised operation specimens from exposure of 74 non-erupted molars in 63 young individuals (34 boys, 29 girls). Eighteen of the 74 specimens (or 24.3%) were diagnosed as "classical" odontogenic tumors belonging to the following entities: ameloblastic fibroma (seven), ameloblastic fibrodentinoma (six), ameloblastic fibro-odontoma (four) and complex odontoma (one). Twenty-two specimens (or 29.7%) showed a hitherto unrecognized odontogenic lesion of hamartomatous character, termed odontogenic giant cell fibromatosis (OGCF). Thus, 54.1% of the specimens could be diagnosed as odontogenic tumors or hamartomas. Histomorphologic changes could not be detected in the remaining 34 specimens (45.9%). Odontogenic tumors were associated with unerupted first molars much more frequently than with second molars (ratio 8:1). The OGCF had a strong association with unerupted mandibular molars. Further, opercula of mandibular first molars frequently revealed odontogenic lesions whereas tissue overlying the crown of unerupted maxillary second molars often was reported as normal operculum.

Adolescent↗