7. Influence Of Hereditary And Environmental Factors On Developing Of Malocclusion During Intrauterine Period Flashcards
(20 cards)
7. Influence Of Hereditary And Environmental Factors On Malocclusion
Factors that contribute to malocclusion, and why early intervention important
- Genetic and environmental factors
- Early intervention is crucial because malocclusion can often be prevented or intercepted by timely removal of cause
7. Influence Of Hereditary And Environmental Factors On Malocclusion
Heredity role in various dental conditions
The transfer of traits or characteristics from parents to offspring
7. Influence Of Hereditary And Environmental Factors On Malocclusion
Heredity can cause the following dental conditions
- Facial asymmetries
- Micro and macrognathia
- Micro and macrodontia
- Anodontia
- Oligodontia
- Hypodontia
- Hyperdontia
- Deep bite
- Crowding
- Rotations
7. Influence Of Hereditary And Environmental Factors On Malocclusion
Types of transmission of malocclusion
- Repetitive-recurrence within immediate family
- Discontinuous-recurrence within immediate family
- Variable-expression of different but related types of malocclusion within several generations of same family
7. Influence Of Hereditary And Environmental Factors On Malocclusion
Modes of inheritance
- Dominant
- Recessive
- Sex-linked
- Polygenic
- Chromosomal
7. Influence Of Hereditary And Environmental Factors On Malocclusion
Congenital defects are
Malformations seen at time of birth
7. Influence Of Hereditary And Environmental Factors On Malocclusion
Types of congenital factors
- Local
- General
7. Influence Of Hereditary And Environmental Factors On Malocclusion
General congenital factors leading to malocclusion
- Abnormal state of mother during pregnancy
- Malnutrition
- Endocrinopathies (disease of an endocrine gland)
- Infectious diseases
- Metabolic and nutritional disturbances
- Accidents during pregnancy and child birth
7. Influence Of Hereditary And Environmental Factors On Malocclusion
Local congenital factors
- Clefts of face and palate
- Macro and microglossia
- Cleidocranial dysostosis
=> - Abnormalities of jaw development due to intra-uterine position
7. Influence Of Hereditary And Environmental Factors On Malocclusion
Common genetic defects in orthodontics
- Cleft lip and palate
- Congenital syphilis
- Maternal rubella infection
- Cleidocranial dysostosis
7. Influence Of Hereditary And Environmental Factors On Malocclusion
Cleft lip and palate
- Furrow/breach in the palatal vault
- Most common
- Patients may exhibit=>
o Missing teeth
o Mobile teeth
o Rotations
o Cross bite
o Impacted teeth
o supernumerary teeth
7. Influence Of Hereditary And Environmental Factors On Malocclusion
Congenital syphilis orthodontic presentation
- Child w/ one or more of following features=>
o Hutchinson’s incisors
o Mulberry molars
o Enamel deficiency
o Extensive dental decay
o Maxilla may be small in size relative to mandible
o Anterior cross bite
7. Influence Of Hereditary And Environmental Factors On Malocclusion
Maternal rubella infection
- Infection during pregnancy results in=>
o Dental hypoplasia
o Retarded eruption of teeth
o Extensive caries
7. Influence Of Hereditary And Environmental Factors On Malocclusion
Cleidocranial dysostosis
- Unilateral or bilateral,
partial or complete absence of the clavicle - May cause=>
o Maxillary retrusion and possible mandibular protrusion
o Over-retained deciduous teeth and retarded permanent teeth eruption
o Presence of supernumerary teeth
o Presence of short and thin roots
7. Influence Of Hereditary And Environmental Factors On Malocclusion
Groups of environmental risk factors
- Prenatal
- Postnatal
7. Influence Of Hereditary And Environmental Factors On Malocclusion
Prenatal factors contributing to malocclusion
- Indian Men Can Radicalise Indigenous Childrens Growing Minds
- Intra-uterine
- Medications
- Chemical agents
- Radiation
- Infectious diseases
- Chronic diseases
- Gestational diabetes
- Malnutrition
7. Influence Of Hereditary And Environmental Factors On Malocclusion
Intrauterine prenatal factors
- Pressure against rapidly growing areas leads to distortion
- Arm pressed against face leading to maxillary deficiency
- Decreased amniotic fluid leading to small mandible
7. Influence Of Hereditary And Environmental Factors On Malocclusion
Medication prenatal factors
- Classified as: A-can be used during pregnancy; B and C- can be
used with exceptions; D-forbidden - D: ASS, antidepressants, anxiolytics, dilantin, 6-mercaptopurine(cause cleft lip and palate)
- Thalidomide (cancer treatment)-( causes mental retardation and flipper extremities)
- Aminopterin (chemotherapy)-( causes anencephaly) (absence of a major portion of
the brain, skull, and scalp)
7. Influence Of Hereditary And Environmental Factors On Malocclusion
Chemical agent prenatal factors
- Alcohol (child is physically retarded, shows with a flat mid-face)
- Smoking (cleft lip and palate)
7. Influence Of Hereditary And Environmental Factors On Malocclusion
Post natal factors
Birth injuries
