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 Indian J Med Microbiol  
 

Figure 3: Case report no. 3. (a) Pre-operative clinical picture showing discoloured tooth 21. (b) Pre-operative radiograph showing partially PCO. (c) Sagittal section of CBCT showing partially PCO in tooth 21. (d) Virtual drill path traced in CBCT volume of tooth 21. (e) Minimized guide stabilized intraorally using Putty. (f) Minimized access cavity preparation through incisal edge. (g) Working length radiograph. (h) Post-operative obturation radiograph. (i) 12-month follow-up radiograph

Figure 3: Case report no. 3. (a) Pre-operative clinical picture showing discoloured tooth 21. (b) Pre-operative radiograph showing partially PCO. (c) Sagittal section of CBCT showing partially PCO in tooth 21. (d) Virtual drill path traced in CBCT volume of tooth 21. (e) Minimized guide stabilized intraorally using Putty. (f) Minimized access cavity preparation through incisal edge. (g) Working length radiograph. (h) Post-operative obturation radiograph. (i) 12-month follow-up radiograph