In this collection we will review many important informations for dental students
Endodontics
Course Review
Enoch Ng, DDS 2014
-
Split Tooth
o
Progresses from cracked tooth
o
Segments are mobile
o
Usually extracted
For some Mx molars, sometimes can NSRCT, mobile segment can be removed, then restored
-
Vertical Root Fracture
o
Longitudinal fracture originating from root
o
Usually involves previously RCT treated tooth
Force from impaction of GP (84%)
Operative and post-space errors second most likely cause (too long, too wide)
o
Buccal-lingual fractures initiated at root
Factors beyond Operator Control
-
Canal shape and size
-
Dentin thickness
-
Much of fracture susceptibility is intrinsic to root and canal morphology – beyond clinicial control
Dental History and Exam for Vertical Root Fractures
o
Repeated occlusal adjustments with temporary symptom relief
o
Variable discomfort with biting/touch
o
Patient reports gum-bump/boil, bad taste, drainage
-
Clinical Exam
o
Palpate gingiva to assess for fenestrations, dehiscence
o
Variable percussion sensitivity
o
Sinus tract(s)
Perio pockets – 78%
Isolated perio probing pocket – suggestive of deep crack or VRF
Must rule out endo perio lesion with drainage through sulcus
Radiolucency – 72%
Diffuse longitudinal radiolucency (J-shaped or halo-like appearance) suggests VRF
Take PAs from multiple angles
Fracture not visualized unless beam passes through exactly the same plane as fracture
Swelling – 53%
Sinus tracts – 42%
Average time from RCT to VRF = 10.8 years
-
Surgical Assessment
o
Allows for visual assessment of root surface if a crack is highly suspected and cannot be confirmed by
other diagnostic means
-
Treatment – extraction (or for some multirooted Mx molars, root amputation)
Longitudinal Root Fracture Summary
-
Loose tooth, endo treated, operative procedures, post space
-
Factors that induce stress – post placement, obturation, parafunctional habits
-
Cracked teeth – present with variable symptoms – multiple tests most predictable way to reach sound diagnosis
-
Prognosis of cracked tooth depends on extent of crack
-
If symptoms have been unresolved by dental treatment(s), should suspect cracks and fractures