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problems of primary teeth eruption
Transcript of problems of primary teeth eruption
Ankylosed Primary teeth
Deciduous premolars or incisors may be retained even though the permanent teeth have erupted. The deciduous crowns are likely to protrude at odd angles and cause difficult mastication.
presented by : Maysa Jamjoum
those are teeth which are present at birth
those are teeth which erupt within 30 days of birth
superficial position of tooth germ
increased rate of eruption
incidence of natal & neonatal teeth has been estimated to be 1:1000 & 1:30000
It is seen that 85% of Natal & Neonatal teeth are MANDIBULAR INCISORS
11% Maxillary Incisor
3% Mandibular Cuspid
1% Maxillary cuspid/ Molar
Syndromes associated with Natal & Neonatal Teeth
Ellis Van Crevald syndrome
Riga - Fede syndrome
A radiograph should be made to determine the amount of root development
and the relationship between the prematurely erupted tooth and adjacent teeth
one of the parents hold the film inside baby`s mouth while making the x-Ray
laceration of the tongue
painful breastfeeding for the mother
traumatization of the nipple
or ventral surface of the tongue
Extraction of the tooth/teeth should be performed in case of :
hypermobile teeth which are prone to aspiration or ingestion
if tooth extraction is indicated, the tooth must be removed completely ( crown + developing root)
Be careful ! Dont traumatize the premanent tooth bud
fusion of the tooth to surrounding bone
what does that mean ?
loss of PDLs
Formation of cementum to fill the space between the tooth & bone
How to determine if the tooth is anklosed ?
Radiographs will show loss of PDL space
percussion of the tooth reveals a dull sound compared to un-ankylosed teeth
What are the consequences of ankylosis
ankylosis affects the growth and development of the jaws and developing occlusion
space loss. and distortion of facial height in some cases of ankylosis
impaction of the succedaneous tooth
tilting of neighboring permanent teeth
the ankylosed tooth appears to have submerged below level of occlusion
a tooth that has not erupted to the point of making contact with the opposing maxillary or mandibular tooth during mastication. Such a tooth may be immobile as a result of ankylosis to the mandible or maxilla.
The most common reason is the absence of the permanent tooth, which would normally push on the root of the primary tooth. This occurs about 2.5–6.9 percent of the time. It also happens more in females than in males.
The other reasons for over-retained primary teeth are :
pathology, obstructions, misalignment of the permanent tooth underneath, trauma, infection and late eruption of the permanent tooth.
Why should we treat this condition?
Why not leave the over-retained primary tooth alone?
Over-retained primary teeth can cause problems if not properly treated. They can cause periodontal problems, dental caries and the tipping of the adjacent permanent teeth.
is a rare congenital disorder ( present at birth) in which the bones become overly dense
this results from an imbalance between the formation of bone and the breakdown of bone.
symptoms can include fractures, frequent infections, blindness, deafness and strokes.
osteopetrosis is also known as Albers-Schonberg disease, generalized congenital osteosclerosis, Ivory bones, Marble bones, Osteosclerosis fragilis generalisata
What Are the Different Forms?
There are two major types of osteopetrosis: malignant infantile and adult.
The malignant infantile form is evident at or shortly after birth and can greatly reduce life expectancy. Despite its name, it is not related to cancer. The formal name for this is autosomal recessive osteopetrosis.
The adult form is milder and may not be diagnosed until adolescence or adulthood. The formal name for this is autosomal dominant osteopetrosis.
Because some cases of osteopetrosis do not fit clearly into these two categories, some scientists recognize a third type called
Found in children younger than age 10, this form is more severe than the adult form, but less severe than the malignant infantile form. The vast majority of the patients falling into this category have a severe form of autosomal dominant osteopetrosis (the “adult” disease).
What Is the Cause?
Osteopetrosis is caused by defects in one or more genes involved in the formation, development, and function of cells called osteoclasts. These cells break down bone tissue during bone remodeling. Remodeling is a normal process in which old bone is removed and new bone is created to replace it. The malignant infantile form of osteopetrosis occurs when a child inherits a copy of the defective gene from both parents.
Only one copy of the defective gene is necessary for the adult form. This can be passed from one parent. However, in many cases, the abnormal gene does not come from either parent, but may be the result of a new gene mutation that happens at conception.
Course Instructor : Dr. Hanali Abu Shilbaye