Parcial 1 Flashcards
Is a physiological process associated with growth in which the tooth move from its original position eithe
Is takes place inside the bone and there is only a lateral displacement from the point of origin of the dental lámina towards the covering gum
Pre-eruptive phase
_____has connective tissue and remains of the dental lámina that cross the bone during the eruption of the tooth
The gubernacular core
Manu osteoclasts appear in the __________ that will enlarge this canal for the passage
Gubernacular cord
It begins when 50%/75% of the tooth root is formed. There is an intense vertical displacement which allows the tooth to move towards the mucosa
Pre-functional phase
It begins at the tooth makes contact with the antagonist and begins to perform the chewing function. The duration of this phase is the entire life of the tooth, since the chewing functionally produces abrasión on the occlusal surface and contact points between the teeth.
Functional phase
It is the absence of one or more dental organs and is a common development anomaly in both dentitions, it is the result of a disorder of the dental lámina which prevents the formation of the tooth germ. The absence is often bilateral
Agenesis
It is a alteration in the eruptive trajectory of de dental organ leading to its impaction against the adjacent tooth. Ectopic teeth are found in unusual postions or displaced from their normal anatomical location. The presence of an ectopic tooth can lead to malocclusion
Ectopic eruption
It is the change in the position of two adjacent teeth in relation to their roots in the same quadrant of the dental arch which can lead and inverted eruption position and alter the normal sequence of eruption. They are generally unilateral, more frequent in the upper arch
Transposition
Despite of having been fully formed they have not emerged in the mouth during the usual period, and they can remain partially or completely inside the jaw bone
Impacted teeth
Formation abnormalities may be due to systemic alterations that begins in childhood or early adolescence
Systemic factors
Tooth abnormalities caused by systemic disease include
Alterations in the number of teeth, structural defects of enamel, dentin and cementum and in some cases variations in tooth size
The appearance of skeletal development disorders due to hereditary factors in some cases manifests at birth and in others they develop during childhood or adolescence
Genetic factors
Dental anomalies can also occur due to a local cause for example: specific blow, such as trauma during tooth development or it may be of idiopathic etiology
Environmental factors
Any alteration in the bone growth of the maxilla or mandible and in the dental positions that impede the correct function of the chewing system with the subsequent consequence that this dysfunction has on the teeth themselves the gums and the bones that support them the temporomandibular joint and facial aesthetics
Maloclussion
Father of orthodontic
Edward H. Angle
Maloclussion etiology
General factors and local factor
Molar classification
Class 1: mesio buccal cuspide of the first permanent upper molar occludes with the bucal grove of the first permanent lower molar
Class 2: mesio buccal cúspide of the 1st permanent upper molar occludes in front of the buccal groove of the first permanent lower molar
Class 3: mesio buccal cuspide of the 1st permanent upper molar occludes behind of the buccal groove of the first permanent lower molar
Are occupied by the dental papilla
Embrasure
Canine classification
Class 1: the cusp of the upper canine occludes between the embrasure of the lower canine and the lower first premolar
Class 2: the cusp of the upper canine occludes in front of the embrasure of the lower canine and the lower first premolar
Class 3: the cusp of the upper canine occludes behind the embrasure of the lower canine and the lower first premolar
Is the absence of formation of three or more dental organs
Hypodontia
Teeth that appearance in addition of the regular number of teeth
Supernumerary teeth
It’s cabaracterized by having more teeth than the regular number of teeth
Hyperdontia
Supernumerary between two upper incisors
Mesiodens
Is applied to teeth that are smaller than the limits of variation considered normal
Microdontia
True generalized microdontia
En todos los dientes
Relative generalized microdontia
3 a 5 dientes
Localized microdontia
1 a 2 dientes
Is applied to the teeth that are bigger than the limits of variation considered normal
Macrodontia
True generalized macrodontia
Gigantism, pituitary, hemifacial hypertrophy
Relative generalized macrodontia
Size of the teeth bigger than the jaw
Localized microdontia
Un diente
Is the union of two developing teeth into a single structure with two independent pulp canals
Fusion
From a single enamel organ two teeth form or attempt to form and normally there is only one pulp canal.
Germination
It’s an excessive root angulation and may be the result of a trauma in the deciduous dentition
Dilaceration
Also called invaginated tooth. This development anomaly is a lingual invagination of the enamel and can occur in primary and permanent teeth
Dens in dent