Root Resorption Flashcards
What is root resorption
Non bacterial destruction of dental hard and soft tissue due to interaction of clastic cells
Surfaces involved in preventing resorption
PDL
Cementum
Predentine
Types of internal resorption vs external resorption
Inflammatory, replacement
Vs
Inflammatory, replacement, cervical, surface
Internal inflammatory resorption pathogenesis
Coronal pulp necrotic, apical pulp vital
Intra-pulpal lesion- inflammatory + vascular tissue
Lesion progresses until apical pulp completely necrotic
Internal inflammatory response tx
RCT w/nsCAOH (2W)
Obturation
Internal inflammatory resorption signs
Clinically- pink discolouration, sinus tract if root perforated/assoc. chronic apical abscess
Radiographically- oval shaped radiolucency, parallaxing shows same position in canal
Internal replacement signs
Clinical- none
Radiographic- irregularly shaped canal, cloudy/mottled appearance
External surface resorption signs
Clinical- mobility
Radiograph- horizontal loss of external apical tooth substance, PDL intact
External surface resorption aetiology
Idiopathic
Orthodontic
Ectopic teeth
Pathological lesions
External surface resorption tx
Pulp healthy= endo has no effect
Removal of source
Splint if mobile
External inflammatory signs
Clinical- negative to sensibility tests, possible sinus/swelling/TTP/mobility
Radiograph- radiolucency on external root surface of dentine/adjacent bone
External inflammatory aetiology
Necrotic pulp- bacterial/dental trauma
Root canal toxins reach external root surface, cause resorption
External inflammatory response tx
RCT w/nsCAOH(2W), ledermix and obturate
Surgical endodontics
XLA
External replacement resorption signs
Clinically- infraoccluded, high pitched percussion, no mobility
Radiograph- resorption lacunae filled with bone, PDL space missing
External replacement resorption aetiology
Trauma- avulsion, lateral luxation
