Odontogenic lesions in opercula of permanent molars delayed in eruption

Philipsen, H. P.; Thosaporn, Wacharaporn; Reichart, Peter A.; Grundt, Gerda

doi:10.1111/j.1600-0714.1992.tb00967.x

Cited by 36 publications

(30 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Multinucleated giant cells with a fibroblast-like shape have previously been found in the connective tissue covering teeth delayed in eruption (Onishi et al, 2003;Philipsen et al, 1992;Yonemochi et al, 1998), in the retrocuspid papilla (Buchner et al, 1990), and in cutaneous giant cell collagenomas, where they were notably associated with mast cells (Ramos et al, 2002). The ultrastructural features confirmed that the multinucleated cells of opercula were giant cells.…”

Section: Discussionsupporting

confidence: 57%

“…Odontogenic epithelium has previously been noted particularly in opercula of teeth delayed in eruption (Gardner and Radden, 1995;Gomez et al, 1998;Lukinmaa et al, 1990;Philipsen et al, 1992;Sandler et al, 1988;Yonemochi et al, 1998). As erupting teeth are usually covered with the reduced enamel epithelium derived from the antecedent dental lamina, the presence of epithelial rests in normal opercula is not surprising.…”

Section: Discussionmentioning

confidence: 92%

See 1 more Smart Citation

Quantitative histological and ultrastructural features of opercula of normally erupting human teeth

Verma¹,

Nair²,

Luder³

2005

Microscopy Res & Technique

View full text Add to dashboard Cite

Tooth eruption across the mucosa in humans has been studied rarely, although there are disturbances of eruption that are attributed specifically to failure of the supraosseous eruptive migration. The aim of this study was to analyze the soft tissues covering normally erupting teeth so as to get an insight into the supraosseous phase of tooth eruption and to provide the basis for comparison with cases of eruption disturbances. Six opercula covering normally erupting permanent molars (primary opercula) and six of succedaneous teeth (secondary opercula) were surgically removed from 10 patients aged 7.5-17.5 years. Specimens were examined light and electron microscopically and analyzed morphometrically. All opercula contained strands and islands of odontogenic epithelium, prominent numbers of high endothelial venules, nerves, and mast cells. Nerves comprised normally structured, 1.5-3.5 microm thick myelinated (Adelta) and thinner unmyelinated (C) fibers. In primary opercula, the proportions of blood vessels and nerves were three- and sevenfold higher than the respective values for the secondary opercula. Furthermore, primary opercula contained multinucleated, fibroblast-like giant cells that were not observed in secondary opercula. As all teeth under investigation were erupting normally, neither the presence of the giant cells nor the atypical proportions of blood vessels and nerves appeared to be decisive in the eruption process. These conspicuous tissue components of opercula seem merely to accompany the eruptive tooth movement.

show abstract

Section: Discussionsupporting

confidence: 57%

Section: Discussionmentioning

confidence: 92%

Quantitative histological and ultrastructural features of opercula of normally erupting human teeth

Verma¹,

Nair²,

Luder³

2005

Microscopy Res & Technique

View full text Add to dashboard Cite

show abstract

“…Maxillary first molars were present in almost all patients with non-syndromic hypodontia who were missing several other teeth [15,16]. For its part, it is always studied delayed eruption of tooth and eruption disorder of the maxillary first molar [17][18][19]. Conversely, reports of patients missing only the maxillary first molar have also been published [5,[20][21][22].…”

Section: Introductionmentioning

confidence: 98%

Formation and development of maxillary first molars with delayed eruption

et al. 2014

View full text Add to dashboard Cite

Cases of congenitally missing and delayed eruption of the maxillary first molar are rare. However, in recent years, we have experienced cases of suspected delayed eruption of or congenitally missing first molars. The purpose of this study was to analyze the formation of delayed erupted maxillary first molars (M1) (>2 standard deviations), which play important roles in occlusion, and normal eruption of the maxillary first molars (U6). The frequency of M1 among patients born between 1974 and 1994 in one institution with a clear total patient number and personal oral histories was 1.55 % [80 % bilateral eruption in 8 of 806 male patients (0.99 %) and 23 of 1195 female patients (1.92 %)]. To evaluate the formation and eruption of M1 according to Moorrees's tooth formation stages, panoramic X-ray films were obtained every year for 73 patients with M1 from 3 institutions (20 male and 53 female patients, total 131 M1s) without systematic histories or genetic disorders. The development/growth curve of M1 was fitted to both the logistic curve and U6 curve. The M1 development/growth curve was started behind with U6 curve; however, the straight part of the M1 curve exhibited steep inclination compared with the straight part of the U6 curve. The curve of the eruption pathway of M1 also exhibited a sigmoid S shape. These results indicate that the development and migration speed of M1 are faster than that of U6, excluding the delayed start point. These results may help orthodontists in treatment planning for patients with M1.

show abstract

“…The association is seen with the opercula of the unerupted or delayed erupted second and third molars [6,7] . Previous literature has reported lesions like odontogenic giant cell fibromatosis (OGCF) and Abhishek B et al Odontogenic hamartomas 493 peripheral myxofibrous hyperplasia (PMH) [8] .…”

Section: P E R I C O R O N a L H A M A R T O M A T O U S Lesions (Phls)mentioning

confidence: 99%

“…The etiology of the peripheral odontogenic fibroma whether reactive or hamartomatous is always debatable. The significant recurrence of the lesion suggests its neoplastic character and the lack of giant cells in the histopathology suggest that PHLs are unique as an entity [7] .…”

Section: P E R I C O R O N a L H A M A R T O M A T O U S Lesions (Phls)mentioning

confidence: 99%

Controversial Odontogenic Hamartomas- Review on Their Pathogenesis and Histopathology

Banerjee¹,

Tanu²,

Singroha³

et al. 2017

Journal of Tumor

View full text Add to dashboard Cite

metimes understated. There always lays a big controversy depicting an entity as hamartoma. Hamartomas are frequently encountered in major organs like liver, lung, pancreas etc. but the occurrence in oral cavity is rare. The lesions enlisted in this review may not be true hamartomas but depicts strong correlation to neoplasms. Understanding the hamartomatous nature of an odontogenic entity will help us understanding the outcome of the treatment and chances of fatality HAMARTOMASHamartomas, which are dysmorphic or morphologically altered proliferation of cells native to the organ in which they arise, gain a certain size before ceasing their proliferation. This type of biologic behavior may be expansile and is locally resorptive of bone but does not invade adjacent tissue. ODONTOGENIC GINGIVAL EPITHELIAL HAMARTOMA (OGEH)There are two important sources that are responsible for the development of the odontogenic group of lesions; cell rests of Serres (remnants of dental lamina) and cell rests of Malassez (remnants of Hertwig epithelial root sheath). These cell rests are found as clusters which upon getting stimulus give rise to pathological entities. The terminology OGEH was initially suggested by Baden et al [1,2] . This lesion has a rare occurrence, prevalent mostly in the middle age group (3 rd to 5 th decade) and most commonly seen in females (M: F-1: 7) [1,2,3] . The lesion present as a slowly growing, recurrent in occurrence in the soft tissues like gingiva and vestibule. ABSTRACTOdontogenic tumour represents as growth and swellings of variedorigin. The histopathological features of hamartomatous odontogenic entities are not very distinct from neoplasms, but they exhibit different biological behavior. The pathobiology of these lesions is so-

show abstract

Odontogenic lesions in opercula of permanent molars delayed in eruption

Cited by 36 publications

References 6 publications

Quantitative histological and ultrastructural features of opercula of normally erupting human teeth

Quantitative histological and ultrastructural features of opercula of normally erupting human teeth

Formation and development of maxillary first molars with delayed eruption

Controversial Odontogenic Hamartomas- Review on Their Pathogenesis and Histopathology

Contact Info

Product

Resources

About