Ameloblastoma is a benign but invasive odontogenic tumor that arises from epithelial tooth-forming cells. It most commonly occurs in the mandible of adults between 30-60 years old. Clinically, it presents as a painless swelling and expansion of the jaw. Radiographically, it appears as a multilocular radiolucency. Histologically, it is characterized by proliferating odontogenic epithelium forming follicles. Treatment ranges from conservative curettage to segmental resection depending on the size and location of the tumor. Unicystic ameloblastoma originates within the lining of an odontogenic cyst and has a better prognosis than the conventional type.
Benign, locally aggressive tumor of odontogenic epithelium, Previously called adamantinoma, Second most common odontogenic tumor after odontoma, Mandible is most common site, Usually asymptomatic and can be found incidentally on routine dental examinations
Benign, locally aggressive tumor of odontogenic epithelium, Previously called adamantinoma, Second most common odontogenic tumor after odontoma, Mandible is most common site, Usually asymptomatic and can be found incidentally on routine dental examinations
Fibro-osseous lesions of the jaws
Fibrous dysplasia
Cemento-osseous dysplasia
Focal cemento-osseous dysplasia
Periapical cemento-osseous dysplasia
Florid cemento-osseous dysplasia
Ossifying fibroma
Juvenile aggressive ossifying fibroma
Cherubism
Fibro-osseous lesions (FOL) are characterized by replacement of normal bone architecture by collagen fibers and fibroblasts containing calcified tissue.
They include a wide variety of lesions of developmental, dysplastic and neoplastic origins with clinical and radiographic presentation and behavior.
Because of the histological similarities between diverse diseases, proper diagnosis requires correlation of history, clinical and radiographic findings.Fibrous Dysplasia
2. Reactive (dysplastic lesions arising in the tooth-bearing area (presumably of periodontal origin).
a. Periapical cemento-osseous dysplasia
b. Focal cemento-osseous dysplasia
c. Florid cemento-osseous dysplasia
3. Fibro-osseous neoplasms (widely designated as cementifying fibroma, ossifying fibroma or cemento-ossifying fibroma.Bone dysplasias
a. Fibrous dyspla i. Monostoticii. Polyostotic
iii. Polyostotic with endocrinopathy (McCune-Albright)
iv Osteofibrous dysplasia
b. Osteitis deformansc. Pagetoid heritable bone dysplasias of childhood
d. Segmental odontomaxillary dysplasia
2. Cemento-osseous dysplasias
a. Focal cemento-osseous dysplasia b. Florid cemento-osseous dysplasia
3.Inflammatory/reactive processes
a. Focal sclerosing osteomyelitisb. Diffuse sclerosing osteomyelitis
c. Proliferative periostitis
4. Metabolic Disease: hyperparathyroidism
5. Neoplastic lesions (Ossifying fibromas)
a. Ossifying fibromab. Hyperparathyroidism jaw lesion syndrome
c. Juvenile ossifying fibroma i. Trabecular typeii. Psammomatoid type
d. Gigantiform cementomas
Odontogenic keratocyst (OKC) is the cyst arising from the cell rests of dental lamina. It can occur anywhere in the jaw, but commonly seen in the posterior part of the mandible. Radiographically, most OKCs are unilocular when presented at the periapex and can be mistaken for radicular or lateral periodontal cyst.
Includes most common tumors of oral cavity including scc,bcc, melanoma, ameloblastoma, odontoma, fibromas, pindborg tumors etc.
Presented by Dr. Binaya Subedi
A cyst is an epithelium-lined sac containing fluid or semisolid material. In the formation of a cyst, the epithelial cells first proliferate and later undergo degeneration and liquefaction. The liquefied material exerts equal pressure on the walls of the cyst from within. Cysts grow by expansion and thus displace the adjacent teeth by pressure. May can produce expansion of the cortical bone. On a radiograph, the radiolucency of a cyst is usually bordered by a radiopaque periphery of dense sclerotic bone. The radiolucency may be unilocular or multilocular. Odontogenic cysts are those which arise from the epithelium associated with the development of teeth. The source of epithelium is from the enamel organ, the reduced enamel epithelium, the cell rests of Malassez or the remnants of the dental lamina.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Fibro-osseous lesions of the jaws
Fibrous dysplasia
Cemento-osseous dysplasia
Focal cemento-osseous dysplasia
Periapical cemento-osseous dysplasia
Florid cemento-osseous dysplasia
Ossifying fibroma
Juvenile aggressive ossifying fibroma
Cherubism
Fibro-osseous lesions (FOL) are characterized by replacement of normal bone architecture by collagen fibers and fibroblasts containing calcified tissue.
They include a wide variety of lesions of developmental, dysplastic and neoplastic origins with clinical and radiographic presentation and behavior.
Because of the histological similarities between diverse diseases, proper diagnosis requires correlation of history, clinical and radiographic findings.Fibrous Dysplasia
2. Reactive (dysplastic lesions arising in the tooth-bearing area (presumably of periodontal origin).
a. Periapical cemento-osseous dysplasia
b. Focal cemento-osseous dysplasia
c. Florid cemento-osseous dysplasia
3. Fibro-osseous neoplasms (widely designated as cementifying fibroma, ossifying fibroma or cemento-ossifying fibroma.Bone dysplasias
a. Fibrous dyspla i. Monostoticii. Polyostotic
iii. Polyostotic with endocrinopathy (McCune-Albright)
iv Osteofibrous dysplasia
b. Osteitis deformansc. Pagetoid heritable bone dysplasias of childhood
d. Segmental odontomaxillary dysplasia
2. Cemento-osseous dysplasias
a. Focal cemento-osseous dysplasia b. Florid cemento-osseous dysplasia
3.Inflammatory/reactive processes
a. Focal sclerosing osteomyelitisb. Diffuse sclerosing osteomyelitis
c. Proliferative periostitis
4. Metabolic Disease: hyperparathyroidism
5. Neoplastic lesions (Ossifying fibromas)
a. Ossifying fibromab. Hyperparathyroidism jaw lesion syndrome
c. Juvenile ossifying fibroma i. Trabecular typeii. Psammomatoid type
d. Gigantiform cementomas
Odontogenic keratocyst (OKC) is the cyst arising from the cell rests of dental lamina. It can occur anywhere in the jaw, but commonly seen in the posterior part of the mandible. Radiographically, most OKCs are unilocular when presented at the periapex and can be mistaken for radicular or lateral periodontal cyst.
Includes most common tumors of oral cavity including scc,bcc, melanoma, ameloblastoma, odontoma, fibromas, pindborg tumors etc.
Presented by Dr. Binaya Subedi
A cyst is an epithelium-lined sac containing fluid or semisolid material. In the formation of a cyst, the epithelial cells first proliferate and later undergo degeneration and liquefaction. The liquefied material exerts equal pressure on the walls of the cyst from within. Cysts grow by expansion and thus displace the adjacent teeth by pressure. May can produce expansion of the cortical bone. On a radiograph, the radiolucency of a cyst is usually bordered by a radiopaque periphery of dense sclerotic bone. The radiolucency may be unilocular or multilocular. Odontogenic cysts are those which arise from the epithelium associated with the development of teeth. The source of epithelium is from the enamel organ, the reduced enamel epithelium, the cell rests of Malassez or the remnants of the dental lamina.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Odontogenic tumors are growths that develop in the jawbones or soft tissues of the mouth, arising from the tissues that form teeth. These tumors can be benign or malignant and vary widely in their presentation and behavior. Benign tumors include ameloblastoma, odontoma, and cementoblastoma, while malignant tumors include ameloblastic carcinoma and odontogenic sarcoma. Treatment typically involves surgical removal, and prognosis depends on the type and stage of the tumor.
Odontogenic tumors iii/certified fixed orthodontic courses by Indian dental a...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
How to Create Map Views in the Odoo 17 ERPCeline George
The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
3. It is a benign but invasive epithelial odontogenic
neoplasm.
Consisting of proliferating odontogenic
epithelium lying in fibrous stroma
4. etiology
Unknown , but possible causal factors
suggested :
Truama or inflamation
Oral infection,extraction,injury to teeth or jaws
Irritation resulting from eruption of the third
molar
5. Origin of ameloblastoma
The precise point of origin of ameloblastoma is
unknown ,the origin might be from:
Epithelial rests of serre or malassez
Epithelial lining of non neoplastic odontogenic
cyst(dentigerous cyst)
Direct from oral epithelium
7. incidence
It’s the most common epithelial odontogenic
neoplasm.
It comprises about 1% of all oral tumors.
Mandible>maxilla 85%:15%
in mandible:
70% in molar-ramus area, 20%in premolar area,
10% in incisor region
8. incidence
In the maxilla:
Tumor found in the posterior region
Age predilection :
Fourth and fifth decades
The tumor can occur in children or in old age
9. Clinical presentation
In the early stages : ameloblastoma grows slowly
&silently without clinical signs.
in advanced stages:
neoplasm expand cortical plates
thinning of bone (egg shell crackling )erodes
them invades the soft tissue
At this point ameloblastoma present clinically as
a smooth surfaced local expansion of the jaw
producing asymmetry.
10. Clinical presentation
Lesion may be composed of solid tumor,cystic
areas,or booth.
Tipping or loosening of teeth,involvement of inf.
Alveolar nerve may occur.
Draining sinuses,unhealed extraction sockets
associated with granulation tissue within the
socket,bleeding ,trismus& other dental
problems may be the chief complain
11. Clinical presentation
Max. ameloblastoma:
Nasal obstruction is 1st symptoms
Potentially lethal if sinus involved or tumor invade
the bone into soft tissues due to:
Bone is not compact, easily invaded
Proximity to: nasal cavity&sinuses
orbital&pharyngeal tissues
vital structures at base of skull
This factors also complicate comlete removal
12.
13.
14. Radiographic presentation
Ameloblastoma is osteolytic lesion
Unilocular or multilocul radiolucency
Multilocular lesion may be :
Honey combed (small loculation)
Soap bubble (large loculation)
Crtical bone may be spread &expanded or
destroyed.
Unerrupted tooth may be present(resembling
dentigerous cyst)
21. Histopathological findings
Ameloblastoma can be classified into:
Follicular ameloblastoma or plexiform
ameloblastoma.
Variant s of follicular ameloblastoma:
Cystic type
Basal cell type
Acanthomatous type
Dysmoplasatic type
22. Histopathological findings
Follicular ameloblastoma:
Made of epithelial follicles resembling enamel
organ in mature fibrous c.t. stroma.
Epithelial follicles consist of peripheral tall
columnar cells(ameloblast like cells)& central
core of loosely arranged angular cells (the
stellate reticulaum like cells)
27. Differential diagnosis
Other odontogenic tumors:
Ameloblastic fibroma,odontogenic myxoma.
Non odontogenic tumors:
Central giant cell granuloma,aneurysmal bone
cyst.
Odontogenic cysts:
Dentigerous cyst,odontogenic keratocyst
28. Treatment
Treatment of ameloblastoma ranges from
conservative curettage to radicular resection.
Treatment varies according to
site,size&characteristics of the ameloblastoma
Curettage
En-block resection
Segmental resection
29. curettage
It is the removal of the tumor by scraping it from
the surrounding normal tissue.
It is the least desirable form of therapy.
Failure of curettage is due to extension of tumor
cell nests beyond the clinical& radiographic
margins of the lesion,therefore it is impossible
to eradicate by scraping procedure.
30. En –block resection
It is removal of the tumor with a rim of uninvolved
bone safe margin,but with maintaining the
continuity of the jaw.
It is frequently used for ameloblastoma,although
there is a diffuse invasion of cancellous spaces of
bone marrow by finger like projections,tumor
tissue doesn’t invade the haversian system of
compact bone,thus compact bone of mandible
can be eroded but it is less likely to be invaded.
31. Segmental resection
Segmental resection including
hemimaxillectomy& hemimanibulectomy has
been the most commonly used treatment for
ameloblastoma.
Most authors who advocate this method have
had the least number of recurrence.
32.
33.
34.
35.
36. Unicystic(mural) ameloblastoma
Its formed in the wall of a dentigerous cyst
Its ranked next to dentigerous cyst as the most
frequently occuring pathologic pericoronal
radiolucency.
The terms mural or unicystic are used to identify
this type ,although unicystic ameloblastoma
can occur in other locations ¬ contacted to
teeth
37. Unicystic(mural) ameloblastoma
It represent about 5% of all ameloblastoma.
The conventional ameloblastoma and mural
ameloblastoma are similar in predilection for
gender(males&females equally affected)&
Site(mand. 3rd molar region)
However the mural variety occur in younger age
gp.(2nd &3rd decades)
Can be related to other types of
cyst(radicular,primordial,residual--
,globulomaxillary)
38. Unicystic(mural) ameloblastoma
in early stage asymptomatic,undetected untile
pericoronal radiolucency is seen on routine
radiograph.
Slowly enlarged,slight non tender sweeling
appear clinically.
If bone destruction occur,palpation discloses
softer areas.
42. management
Before undertaking surgical procedure of
pericoronal radiolucency, differential diagnosis
bet. mural(unicystic) &conventional
ameloblastoma should be completed.
At surgery the cyst should be enucleated,and if
mural mass is discovered flag it with suture to
enable the pathologist for further
investigation.
43. management
If pathologist examination establishes the mass
as ameloblastoma that has not penetrated the
basement membrane no further surgery is
done.
If the neoplasm has penetrated the basement
membrane more the bone should be removed
with curettage.
In all cases careful periodic follow- up is always
indicated.
44.
45.
46.
47.
48.
49.
50.
51. Peripheral(extraosseous)
ameloblastoma
Origin: basal layer of oral epith.&extraosseous
portion of epith. Rests of serre.
Site: commonly affect gingiva & alveolar mucosa
mandible> maxilla
Micoscopically it looks like acanthomatous type of
basal cell carcinoma of the skin.
Management: excision.
Behavior: less invasive than intraosseous
ameloblastoma.