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Teeth01:15

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The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
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The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
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Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
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During meiosis, chromosomes occasionally separate improperly. This occurs due to failure of homologous chromosome separation during meiosis I or failed sister chromatid separation during meiosis II. In some species, notably plants, nondisjunction can result in an organism with an entire additional set of chromosomes, which is called polyploidy. In humans, nondisjunction can occur during male or female gametogenesis and the resulting gametes possess one too many or one too few chromosomes.
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Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate correctly and move to the opposite poles of the cells. This produces daughter cells with abnormal chromosome numbers.  Nondisjunction is common during anaphase I or anaphase II of meiosis.  Mutations in synaptonemal complex proteins that attach homologous chromosomes increase the chances of nondisjunction in anaphase I of meiosis I. In contrast, mutations in topoisomerases and condensins that hold...
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Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology
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Asymptomatic nonsyndromic multiple supernumerary premolars.

Seema Gupta1, Mridula Goswami2

  • 1Senior Resident, Department of Pediatric Dentistry, Maulana Azad Institute of Dental Sciences, New Delhi, India,

International Journal of Clinical Pediatric Dentistry
|September 11, 2014
PubMed
Summary
This summary is machine-generated.

Multiple supernumerary premolars, without systemic issues, are rare. Surgical removal is recommended for eruption problems or pathologies, otherwise, regular monitoring is advised.

Keywords:
ImpactedNonsyndromicSupernumerary premolars

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Area of Science:

  • Dentistry
  • Oral Surgery
  • Pediatric Dentistry

Background:

  • Supernumerary teeth are extra teeth, often discovered incidentally.
  • Multiple supernumerary teeth without syndromes are uncommon.

Observation:

  • A case of asymptomatic, nonsyndromic multiple supernumerary premolars is presented.
  • These teeth were morphologically normal and not associated with any systemic condition.

Findings:

  • Surgical intervention for supernumerary teeth is indicated when adjacent teeth eruption is delayed, displaced, or when pathologies like cysts or resorption occur.
  • Conservative management with radiographic monitoring is an alternative if surgical risks outweigh benefits.

Implications:

  • This case highlights the importance of recognizing and managing asymptomatic nonsyndromic supernumerary teeth.
  • Early detection and appropriate management are crucial for preventing complications and ensuring proper dental development.