Fig. 7.1 (a) Preoperative radiograph. (b) Fractured instrument in the apical third of the curved distal root of a first mandibular molar. (c) Root perforation and creation of “iatrogenic” canal…
Factors affecting intracanal instrument fracture Operator related Skill, proficiency, judgment Anatomy related Access cavity Root canal anatomy Instrument related Material Design Manufacturing process and errors Technique/use related Motors operating parameters…
Fig. 1.1 Fragments of various endodontic instruments Fig. 1.2 (a) Fragment of an irrigation needle in the mesiobuccal root canal of a maxillary molar. (b) Fragment of the notched end…
Fig. 3.1 Image showing H-files discarded after clinical use due to plastic deformation of the cutting tip Fig. 3.2 Distribution of fractured and plastically deformed instruments within different ISO sizes…
Study Lesiona No lesion Healing (%) Effect on healing Strindberg (1956) 2/4 9/11 11/15 (73%) Overall 19% reduction (although lower when lesion is present) Grahnén and Hansson (1961) NR NR…
Fig. 5.1 (a) Preoperative radiograph of a mandibular right first molar with a fragment in the middle third of the mesial root. (b, c) Operative microscope photographs of the pulp…
Steps Procedure First Ten vigorous strokes in a scouring sponge soaked in 0.2% chlorhexidine solution Second 30-min presoak in an enzymatic cleaning solution Third 15-min ultrasonication in the same solution…
Author(s) Study design and sample size Methods, devices, instruments, techniques, and protocol used Microscope Definition of success Success rate Shiyakov and Vasileva (2014) In vivo (n = 26) Ultrasonics Yes…
Fig. 4.1 Large MODB pin-retained amalgam restoration. The loss of original occlusal anatomy landmarks and pulp canal space calcification will make this a more challenging tooth to access for root…
Fig. 10.1 Anatomic relationship between pulp and periodontium In case of endodontic lesions, the pathway of inflammation is through the apical foramen, furcation canals, and lateral accessory canals to the…
