Root Resorption

sanna pathy
Mind Map by sanna pathy, updated more than 1 year ago
sanna pathy
Created by sanna pathy about 1 year ago
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Description

First Year Dentistry Mind Map on Root Resorption, created by sanna pathy on 01/13/2020.

Resource summary

Root Resorption
  1. Process
    1. Resorption by Giant cells (mononuclear phagocytes)
      1. Resorption of tooth prevented by Pre-dentine & Pre-cementum layer (not fully mineralised)
        1. Resorption occurs when fully mineralised dentine or cementum is present against soft tissue
          1. Damage to pre-dentine/pre-cementum layer
            1. Death of Odonto/Cementoblasts -> layer becomes fully mineralised)
            2. Consistent stimulation required for continued resorption
              1. Otherwise resorption stops after 2-3wks & surface repaired with cementum-like material (not fully mineralised)
                1. = Transient root resorption
                  1. No clinical significance
                    1. Normal wear & tear
                      1. Not detectable
                2. Inflammatory resorption
                  1. Giant cell stimuli = Inflammation
                    1. Systemic disorder
                      1. Pressure
                        1. Infection
                        2. External resorption
                          1. Cervical
                            1. Aggressive form
                              1. Less common
                                1. 1) Minor trauma -> damage below attached junctional epithelium
                                  1. 2) Pre-cementum lost
                                    1. 3a) Junctional epithelim grows down & protects root from giant cell colonisation
                                      1. 3b) Giant cells colonise root
                                        1. 4a) Transient root resorption
                                          1. 4b) Stimulus -> progressive resorption
                                            1. Pulp space infection
                                              1. Non-vital pulp
                                                1. Raise flap, clean defect & repair (GIC/composite)
                                                  1. RCT
                                                2. Plaque build up -> external infection
                                                  1. Vital pulp
                                                    1. Pre-dentine prevents pulpal invasion
                                                      1. Treatment
                                                        1. Improve OH
                                                          1. Raise flap, clean defect & repair (GIC/composite)
                                                      2. Bleaching agents
                                                3. Diagnosis
                                                  1. Localised gingival swelling/bleeding
                                                    1. Pulpitis/PAP signs
                                                      1. Pink spot on tooth
                                                        1. Radiograph
                                                      2. Non-cervical
                                                        1. Stimulus
                                                          1. Pressure
                                                            1. Orthodontic treatment
                                                              1. Ectopic/unerupted tooth
                                                                1. U3s causing resorption of U2s
                                                              2. Infection
                                                                1. Apical periodontitis (chronic)
                                                                  1. Canal contents stimulate giant cells
                                                                    1. Treatment = RCT
                                                                      1. Dress with CaOH for 1wk before obturation
                                                                      2. Initial insult often = Trauma
                                                                      3. Systemic disorders
                                                                        1. Hyperparathyroidism
                                                                          1. Paget's disease
                                                                            1. Tumours
                                                                        2. Bone & root resorption
                                                                          1. Radiographically
                                                                            1. Radiolucency moves in relation with different radiograph views
                                                                              1. Tramlines of pulp chamber visible over radiolucency
                                                                          2. Internal resorption
                                                                            1. Radiographically
                                                                              1. Radiolucency does not move with different radiograph views
                                                                                1. No tramlines visible
                                                                                2. Stimulus
                                                                                  1. Infected pulp
                                                                                    1. Toxins damage pre-dentine layer
                                                                                      1. 1) Death of odontoblasts -> no further dentine deposition
                                                                                        1. Trauma -> pressure from bleeding/clot formation
                                                                                          1. 2) Giant cells colonise & transient root resorption occurs
                                                                                            1. 3a) Resorption arrests if pulp recovers (no further inflammation) or Pulp dies
                                                                                              1. 3b) Chronic pulp inflammation -> Progressive resorption
                                                                                          2. Diagnosis
                                                                                            1. Pulpitis signs?
                                                                                              1. Trauma history
                                                                                                1. Pink spot on tooth
                                                                                                  1. Radiographic
                                                                                                  2. Treatment = RCT
                                                                                                    1. CaOH for 1wk before obturation
                                                                                                2. Replacement resorption = Ankylosis
                                                                                                  1. = complete fixation of joint by bony union (no PDL, root fused to bone)
                                                                                                    1. Diagnosis
                                                                                                      1. High metallic percussion note
                                                                                                        1. Rock-solid tooth
                                                                                                          1. Radiographically
                                                                                                            1. loss of PDL
                                                                                                              1. Root merges with bone (moth eaten)
                                                                                                            2. Cause = Trauma -> damaged PDL
                                                                                                              1. Luxation
                                                                                                                1. Avulsion
                                                                                                                2. Treatment = none
                                                                                                                  1. Tooth crown may fracture or decoronate
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