Evaluation of the relationship between obturation length and presence of apical periodontitis by CBCT: an observational cross-sectional study

Abstract

The length of obturation is related to the presence of apical peridontitis and consequently to the success of endodontic treatment.

Prevalence of apical periodontitis and its association with previous root canal treatment, root canal filling length and type of coronal restoration – a cross‐sectional study

“…The results revealed a greater prevalence of periapical lesions (73.2% maxillary teeth and 71.9% mandibular teeth) in teeth and roots with short root fillings (>2mm from the radiographic apex) (Table ). These results are in accordance with several previous studies (Kirkevang et al , Paes da Silva Ramos Fernandes et al , De Sousa Gomide Guimarães et al ). Possible reasons for this finding might include inadequate negotiation, debridement and disinfection of the apical portion of the root canal system and the lack of an adequate apical seal, allowing for the proliferation of apical bacteria and increasing the prevalence of apical periodontitis.…”

“…There was a similar prevalence of periapical lesions when comparing good root filling (46.0%) and overfilled (45.4%) canals (Table ). A previous study (De Sousa Gomide Guimarães et al ) found that the extrusion of materials (sealer or Gutta‐percha) did not improve the healing of the periapical tissues (Schaeffer et al , Schilder ). It has been stated that overfilling may be responsible for irritation and the recruitment of inflammatory cells into the periapical tissues (Ricucci & Langeland ), especially when using sealers containing formaldehyde (Riccuci , Dahl ).…”

“…Good root filling length (which was defined, in the present study, within 0–2 mm from the radiographic apex in order to match with the same interval assessed by Ng et al () in their review) was associated with a lower prevalence of periapical lesions, which is in line with the results reported in Sjögren et al () using the same radiographic reference. One other study using different root filling length intervals concluded the prevalence of periapical radiolucency was lower in roots filled within 1–2mm short from the apex, followed by 0 mm from the apex and only then more than 2 mm shorter from the apex (De Sousa Gomide Guimarães et al ). That same study reported the prevalence of periapical lesions was greater on molars, a result that corroborates with the present study.…”

Effect of Endodontic Sealer in Young Molars Treated by Undergraduate Students - A Randomized Clinical Trial

“…Root canal filling in molar teeth also represents one of the greatest challenges for undergraduate students (6), resulting in higher rates of endodontic mishaps, loss of working length (WL), obturation beyond 2 mm from the radiographic apex, and overfill with gutta-percha (7). Ideally the filling material should be restricted to the intraradicular space (9,10). The presence of extruded material may retard the healing process, especially in apical periodontitis (10).…”

“…Ideally the filling material should be restricted to the intraradicular space (9,10). The presence of extruded material may retard the healing process, especially in apical periodontitis (10). The consequences of extruded filling material are related to the biocompatibility of the material, the solubility in periapical tissues and the susceptibility to phagocytosis (9).…”