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Aim
To investigate the impact of systemic health and tooth‐based factors on the outcome of root canal treatment (RCT).
Methodology
The target population consisted of all patients receiving RCT at the Helsinki University Clinic in 2008–2011. The inclusion criteria were diagnosable pre‐ and postoperative (minimum 6 months after root filling) radiographs and adequate patient records of RCT available...
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