Factors Related to the Outcomes of Cracked Teeth after Endodontic Treatment

Treatment of cracked teeth: A comprehensive narrative review

“…Besides, it should be acknowledged that a number of studies did not specify why endodontic treatment was required, potentially due to their retrospective nature (Chen et al, 2021 ; Malentacca et al, 2021 ). Particularly, with regard to teeth with previous endodontic treatment, the overwhelming majority of researchers provided retreatment (Chen et al, 2021 ; Davis & Shariff, 2019 ; de Toubes et al, 2022 ; Kang et al, 2016 ; Krell & Caplan, 2018 ; Nguyen Thi & Jansson, 2021 ), but did not clarify the exact reasons, for example, whether the teeth had inadequate root canal fillings, developing or persisting periapical pathoses and/or symptoms or if the retreatment was performed for prevention of the above due to secondary caries or the presence of the crack line itself, which could act as a pathway for bacterial invasion. On the other hand, certain investigators proceeded directly to coronal restoration of previously endodontically treated cracked teeth without providing retreatment (Mahgoli et al, 2019 ; Michaelson, 2015 , 2017 ) while others did not explain whether secondary endodontic treatment was part of their management (Abou‐Rass, 1983 ; Liao et al, 2022 ; Malentacca et al, 2021 ).…”

“…A large variance can be noted in the evaluation of outcomes of endodontically treated cracked teeth (Table 2 ), as some studies reported only tooth survival (Kang et al, 2016 ; Liao et al, 2022 ; Nguyen Thi & Jansson, 2021 ; Sim et al, 2016 ; Tan et al, 2006 ), others focused on treatment success (Chen et al, 2021 ; Krell & Caplan, 2018 ) while a number of researchers examined both variables (Davis & Shariff, 2019 ; de Toubes et al, 2022 ; Malentacca et al, 2021 ).…”

“…On the contrary, a broader range of prerequisites for success was implemented by other research teams, which further considered no increase in crack‐associated periodontal probing (Davis & Shariff, 2019 ; de Toubes et al, 2022 ), periapical index (PAI) score ≤2 (de Toubes et al, 2022 ; Dow, 2016 ), no increase in crestal bone loss, no sensitivity in percussion, palpation or bite test, as well as the presence of an occlusally, equilibrated full‐coverage restoration (Davis & Shariff, 2019 ). Respectively, two studies recorded as “failures” cases with an unchanged periapical lesion, although they were followed up for a mean period of 19 months (Liu et al, 2021 ) and 23.3 months (Chen et al, 2021 ), instead of the proposed 4‐year time span (Endodontology, 2006 ). In addition, other studies (Lee et al, 2021b ; Lu et al, 2021 ) had a shorter follow‐up than the minimum required (1 year) for the assessment of success (Endodontology, 2006 ).…”

“…I G U R E 5 Treatment sequence of a cracked 47 with irreversible pulpitis (a) preoperative long-cone periapical radiograph (b) removal of previous amalgam restoration revealing multiple crack lines running towards mesiodistal (green arrows) and buccolingual direction (yellow arrows) (c) root canal obturation completed (d) periapical radiograph after completion of endodontic treatment (e) crown preparation (f) occlusal view after cementation of a metal ceramic crown.treatment success(Chen et al, 2021;Krell & Caplan, 2018) while a number of researchers examined both variables(Davis & Shariff, 2019;de Toubes et al, 2022;Malentacca et al, 2021).…”

Review of Cracked Tooth Syndrome: Etiology, Diagnosis, Management, and Prevention

“…Many restoration procedures, such as the placement of “friction locks” or “self-threaded dentin pins,” may cause stress on the residual tooth structure and eventually result in cracks. Large amalgam restorations of the mandibular molars are often accompanied by tooth cracks [ 46 ]. When a poor-quality amalgam restoration is placed or when moisture and excessive condensation pressure contaminate the newly placed amalgam during restoration, it may also lead to CTS [ 41 , 47 , 48 ].…”