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What happens if a tooth development is interrupted?
What happens if you don't have a tooth development?
Is tooth development a complex biological process?
What causes a larger tooth than normal?
Which dental anomalies are associated with congenitally missing teeth?
What causes tooth agenesis?
Jul 17, 2023 · Fusion is the resultant “combined tooth” appearance where two normally separate tooth germs unite as one developing tooth. Depending on the stage of development when the fusion occurred, the fusion may be complete or incomplete.
- Reed McKinney, Heather Olmo
- 2023/07/17
- 2021
Jul 17, 2023 · Teeth are comprised of many different internal and external structures with a variety of developmental and embryologic origins. If any of these developmental processes are disturbed or over-exaggerated, changes can occur within the developed tooth’s structure.
- Reed McKinney, Heather Olmo
- 2023/07/17
- 2021
Dental Hypoplasia is a condition marked by underdeveloped or incomplete formation of tooth enamel. It can lead to various dental issues, and understanding its causes is crucial for prevention and management. Here’s a closer look at the factors contributing to this condition.
- nerang@amazingsmiles.com.au
- 4 min
- 1 Introduction
- 2 Missing Teeth
- 3 Extra Teeth
- 4 Abnormality of Tooth Size
- 5 Abnormality of Tooth Form
Both the primary and permanent dentitions may be affected by variations in the number, size, and form of the teeth, as well as the structure of the dental hard tissues. These variations may be exclusively genetically determined, brought about by either local or systemically acting environmental factors, or possibly a combination of both genetic and...
Hypodontia is the term most often applied to a situation where a patient has missing teeth as a result of their failure of development. Anodontia describes the total lack of teeth of one or both dentitions. Oligodontia is a term used to describe a situation where multiple (usually more than six) teeth are missing.
Extra teeth (supernumerary teeth) have been reported to occur in 0.2–0.8% of Caucasians in the primary dentition and 1.5–3.5% in the permanent dentition in the same populations. There is a male-to-female ratio of approximately 2:1. Patients with supernumerary primary teeth have a 30–50% chance of these being followed by supernumerary permanent teet...
13.4.1 Crown size
There is a degree of subjectivity regarding what constitutes normal (‘ordinary’) tooth size (and shape). Teeth which are obviously larger than normal are referred to as megadont or macrodont, whereas teeth which are smaller than normal are termed microdont. Crown size is often related to root size, so teeth with large crowns often have large (broad) roots, while teeth with small crowns tend to have small (slender) roots. Microdontia can be associated with hypodontia, as in the example of X-li...
13.4.2 Root size
Root length appears to be subject to some racial variation, with shorter roots being seen in people of Oriental background and larger roots in patients of African origin. Larger than normal roots are most typically seen affecting the permanent maxillary central incisors, with a population prevalence in one Swedish study of 2.3%. Males were four times more likely to be affected than females. Short-rooted teeth in the primary dentition may be associated with other dental abnormalities. Short ro...
13.4.3 Treatment
As with hypodontia, the active cooperation of paediatric dentist, orthodontist, and restorative dentist should be encouraged to optimize treatment planning for young people affected by these conditions from an early age. A megadont maxillary central incisor can be cosmetically unaesthetic and treatment decisions may need to be considered soon after (or, in some cases, before) eruption of the tooth. The options include acceptance, remodelling of the tooth, extraction of the tooth with orthodon...
13.5.1 Abnormality of crown form
Some cases of megadont crowns are due to fusion of adjacent tooth-germs (fusion) or attempts at developmental separation of a single tooth-germ to produce two separate teeth (gemination), and a variety of terms have been used for such situations. The term ‘double teeth’ has been applied to cover both situations. It is necessary to count the number of teeth present clinically and with the aid of radiographs determine whether fusion or gemination has occurred. The prevalence of such abnormaliti...
13.5.2 Accessory cusps
Extra cusps are not uncommon in the human dentition and may occur in both the primary and permanent dentition, most commonly affecting molar teeth. In the primary dentition the most common accessory cusps are seen on either the mesiobuccal aspect of the maxillary first molar or the mesiopalatal aspect of the maxillary second molar, the latter being similar to the cusp of Carabelli seen on the first permanent molar. The latter is a relatively frequent finding on the mesiopalatal aspect of the...
13.5.3 Invaginated teeth
This term refers to the presence of an invagination in the crown of the tooth, forming an infolding lined by enamel within the crown of the tooth and sometimes extending into the root. An invagination of enamel epithelium into the dental papilla during development leads to the formation of the abnormality. The terms invaginated tooth or dens invaginatus can be used; other terms commonly applied (but not necessarily correctly) are dens in dente, gestant composite odontome, and dilated composit...
Aug 8, 2023 · During normal tooth development, many complications can occur that result in the number of developing teeth. These conditions range from the absence of all teeth (anodontia) to having more teeth than the normal number of teeth (hyperdontia).
- Reed McKinney, Heather Olmo
- 2023/08/08
- 2021
Sep 2, 2021 · Development failure of one or more teeth is a result of specific disturbances (failure in the initiation of tooth formation, reduced odontogenic potential of the dental lamina, or premature arrest of tooth development) during the early stages (tooth initiation or morphogenesis stage) of odontogenesis affecting reciprocal interactions between ...
, and esthe-tically acceptable occlusion and normal subsequent dentofacial development. Early diagnosis and successful treatment of developing malocclusions can have both short-term and long-term benefits while achieving the goals of occlusal harmony and function and dentofacial esthetics.1-4 Dentists have the responsibility to recognize, di...
