8. APEXOGENESIS
Vital pulp procedures which allow the continued physiologic
development and formation of the root apex.
To bring about apical development and closure
Enhance continued root dentin formation
9. RATIONALE FOR APEXOGENESIS
• Root end development- normal pulp and
minimal inflammation
• Pulp of immature teeth has significant
reparative potential
• Pulp revascularisation and repair occurs more
efficiently tooth with an open apex
10. GOALS OF APEXOGENESIS
• Sustaining a viable Hertwig’s sheath to allow
continued development of root length for a
favorable crown root ratio.
• Maintain pulp vitality to help maturation of
root.
• Promoting root end closure to create a natural
apical constriction.
17. Re-evaluate every 6 months
Interim coronal restoration
Place calcium hydroxide over the amputation site
Control bleeding
Rinse with saline
Remove Infected portion of the pulp chamber using
round bur and /or spoon excavator
Anesthesia and rubber dam isolation
22. Apexification
• It is defined as a method to induce
development of the root apex of an
immature pulpless tooth by
formation of osteocementum/ bone
like tissue
-cohen
• Apexification is a method of
inducing apical closure through the
formation of mineralized tissue in
the apical pulp region of a non-vital
tooth with an incompletetly formed
root and an open apex
-morse etal 1990
23. When ???
• Incomplete root development- caries, trauma
before root growth and development are
complete
• Extensive apical resorption due to trauma,
periapical pathosis, orthodontic treatment
24. Why cant we obturate it now???
Why should we wait till the apex
closes???
25. Why cant we obturate it now???
• No hard tissue stop against which gutta
percha can be packed
• Weak root dentin- fracture
26. Why apexification preferred over
RCT??
• Open apex
• Blunderbuss canals
• Thin and fragile canal walls
• Absolute dryness of canal difficult to achive
27. Objective
• To induce either closure of open apical third
of root canal or the formation of an apical
calcific barrier against which obturation can
be achieved
29. Calcium hydroxide
• Widely used
• Introduced by KAISER(1964)
• Calcium hydroxide + CMCP
• Popularised by FRANK
• KLEIN AND LEVY- used calcium hydroxide
+cresatin
• Powder mixed with water, intracanal
medicaments or methyl cellulose
• Calcium hydroxide points(58% caoh and 42%
gutta percha)
Osteoid or cementoid
30. MTA
• 1993 TORABINEJAD
• POTENTIAL BIOLOGICAL SEAL
• HYDROPHILLIC- SETTING TIME 4 HOURS
• EXCELLENT SEALING, BIOCOMPATIBLE
• AIDS CEMENTUM AND PDL REGENERATION
33. FIRST VISIT
Rubberdam application following local anesthesia
Access opening
Removal of necrotic pulp
Working length determination
Removal of infected dentin from root canals
Canal dried
Calcium hydroxide placement
Seal with temporary restoration
34. 2nd visit
Follow up for 6 months to 24 months
Radiographic evaluation for root apex
closure
Proceed for RCT
36. Follow up
• Absence of any fistula or sinus
• Absence or decrease in tooth mobility
• Formation of calcific bridge
• Continued apical development
• Absence of internal resorption or periapical
radiolucency
• Evidence of firm stop clinically or
radiographically
37.
38. DURATION DEPENDS ON….
1. Size of the apical foramen at the start of treatment
2. Age
3. Infection
4. inter-appointment painful symptoms
5. frequency of calcium hydroxide dressings
• Reports vary as to the time required to achieve the goal of apical barrier
formation.
• Heithersay achieved apical closure in the time range of 14 to 75 months.
• Chawla used calcium hydroxide paste and achieved closure within 6 to
12 months.
• Kleier found closure of apex within 1 to 30 months.
39. Disadvantages with the conventional
technique….
• Poor patient compliance
• Temporary seal may fail- reinfection -
prolongation
Dutch word: DONDERBUS- THUNDERGUN 18 CENTUARY WEAPON WITH SHORT AND WIDE BARELL
Divergent and flaring root canals, funnel shape wider than coronal aspect of canal
\
Necrotic or non vital pulp
unrestorable carious teeth
Teeth with unfavourable horizontal root fracture
Severe crown root fracture which requires intra radicular retention for restoration
The dental pulp contains immune cells that allow it to mount a response against offending
irritants. The pulp also contains odontoblasts, which are specialized to form
dentin. In the absence of a vital pulp, the tooth structure is susceptible to infection, and
dentin deposition is arrested. Maintenance of pulp vitality is imperative in an immature
permanent tooth to allow continued root development. The pulp tissue is removed when
pathologically inflamed or necrotic.
Depending on the extent of inflammation, pulp
capping, shallow pulpotomy, or conventional pulpotomy may be indicated. The dental
pulp in young patients is more cellular and able to recover from injuries. Cvek et al (1)
demonstrated that in teeth with complex crown fractures, the exposed pulp maintained
its vitality for up to 7 days.
Formocresol, gluteraldehyde, lasers, electrosurgery, feric sulfate, mta
Do not blow air to avoid dessication
‘‘a method of inducing a calcified barrier in a root with an open apex or
the continued apical development of an incompletely formed root in teeth with necrotic
pulp’’
Frank 1966
Calcium hydroxide and camphorated monochloro phenol to stimulate root end closure
Apical development is monitored using pre and post operative radiographs
frank
1. Size of the apical foramen at the start of treatment - Teeth with apices < 2 mm in diameter has significant shorter time .
2. Age - Since less calcified material would be needed to occlude a narrow apex as compared to wide apex; it is understandable that the former would require shorter period for apexification .
3. Infection - some studies have reported that presence of periapical radiolucency at the start of treatment, increases the barrier formation time, whereas others have not .
4. Inter appointment painful symptoms - may delay time taken for apical healing .
5. Frequency of Ca(OH)2 dressings - there is no census on how frequently the dressing should be changed to induce apical healing. Some favour refilling every 3- 6 months, others favour refilling only if there is radiographic evidence of root resorption of paste or only after determining mechanically if the hard tissue barrier formed is adequate.
Rationale is to establish an apical stop that would enable root canal to be filled immediately