Dentigerous cysts are odontogenic cysts that surround the crown of an impacted tooth. They are the most common type of developmental jaw cyst, making up 20% of all jaw cysts. Dentigerous cysts typically occur in males in the second and third decades of life, with the most common sites being the mandibular and maxillary third molars and maxillary cuspid areas. Radiographically, dentigerous cysts can appear as central, lateral, or circumferential expansions surrounding the crown of an unerupted tooth. Small cysts are usually treated with enucleation, while larger cysts involving bone loss require marsupialization.

1. PRESENTED BY :-
HIMANI THAWALE
(INTERN)
DENTIGEROUS
CYST

2. DEFINATION:-
 Dentigerous cyst can be defined as an odantogenic
cyst that surrounds the crown of an impacted
tooth; caused by fluid accumulation between the
reduced enamel epithelium and the enamel surface
resulting in the cyst in which the crown is located
within the lumen.

3. PREVALANCE:-
 This is one of the most common type of
developmental odontogenic cyst - 20% of all jaw cyst.
 10% of impacted teeth have formed a dentigerous
cyst.
 Frequency in the general population has been
estimated at 1.44 cyst for every 100 unerupted teeth.

4. CLINICAL FEATURES:
 Age:- second and third decade of life.
 Sex:- male prediliction
 Most common site:- 1) mandibular third molar
2) maxillary third molar
3) maxillary cuspid areas
(since these are most commonly impacted teeth)
 Most dentigerous cyst are solitary.

5.  Bilateral and multiple cyst are usually found in
association with number of syndromes including:-
- Cleidocranial dysplasia
- Maroteaux- lamy syndrome.
 Dentigerous cyst is capable of becoming an aggressive
lesion.
 Cystic involvement of an unerupted mandibular third
molar may result in “hollowing out” of entire ramus
 In case cyst is associated with a maxillary cuspid ,
expansion of anterior maxilla often occurs & may
superficially resemble an acute sinusitis or cellulitis.
 No pain or discomfort is associated with the cyst unless
it become secondarily infected.

6. RADIOGRAPHIC FEATURES:-
 Three radiological variations of dentigerous cyst are seen
radiographically:-
 Central type:-
In this type the crown is enveloped symmetrically.
 Lateral type:-
This type of radiographic appearance results from
dilation of follicles on one aspect of crown.
 Circumferential type:-
This type results when the follicle expands in a manner in
which the entire tooth appears to be involved by the cyst

8. HISTOLOGIC FEATURES:-
 It is usually composed of thin connective tissue wall with a
thin layer of stratified squamous epithelium lining the lumen.
 Rete peg formation generally absent unless it is secondarily
infected.
 Inflammatory cells and infiltration of connective tissue is
common.
 Presence of rushton bodies within the lining epitehlium is
usually seen with the cyst exhibiting inflammation.
 The content of cystic lumen is thin, watery yellow fluid
,ocasionaaly blood tinged

9. TREATMENT:-
Treatment usually is dictated by size of lesion:-
 Enucleation:- Smaller lesions are surgically removed
entierly
 Marsupilization :- The large cyst which involves severe
bone loss are treated by marsupilization.

10. COMPLICATIONS:-
 Ameloblastoma
 Squamous cell carcinoma
 Mucoepidermoid carcinoma