In endodontics, a sealer’s job is to create a durable, stable, and biocompatible seal that resists dissolution and provides a good bond to dentin and gutta-percha. Among the common choices, epoxy resin–based sealers and calcium silicate–based (bioceramic) sealers are favored for their excellent sealing, low solubility, and long-term stability. Zinc oxide–eugenol–based sealers have a long history and can be useful, but they come with drawbacks like potential solubility and softer properties over time. Glass ionomer cement sealers, while available, are not routinely used as endodontic sealers today because they tend to have more moisture sensitivity during setting, higher long-term solubility, and less reliable sealing performance compared with the other options. Therefore, glass ionomer cement sealer is not a common endodontic sealer.

Prognosis in endodontic treatment is shaped by multiple interacting factors, not just a single element. The preoperative condition and restorability of the tooth set the stage: if a tooth is severely damaged or cannot be reliably restored after endodontic therapy, its long-term success is unlikely, even with excellent root canal work, because coronal leakage undermines healing. Canal anatomy complexity matters because thorough cleaning, disinfection, and obturation depend on accessing all canals; missed anatomy or intricate spaces can harbor bacteria and lead to failure. The presence of periapical lesions reflects prior infection and bone involvement; while such lesions can heal after proper treatment, their presence, size, and duration can influence the healing trajectory and prognosis. Together, these factors determine the likely outcome, so all of them influence prognosis.

Managing pain after endodontic treatment relies on keeping acetaminophen at a therapeutic level while staying within safety limits. A common and effective approach is 1000 mg every 4 to 6 hours as needed, with a maximum of 4000 mg in 24 hours. This dosing provides a strong enough per-dose effect to control moderate post-op pain and maintains relief by not spacing doses too far apart. Waiting 8 hours between doses can leave gaps where pain flares, while smaller doses or unusual intervals may be less reliable for complete analgesia. So, the best option aligns with a 1000 mg per-dose schedule every 4–6 hours postoperatively.

Postoperative soreness after root canal therapy mainly reflects temporary inflammation in the surrounding tissues. For most patients, this discomfort lasts about two to three days, with peak pain in the first 24 to 48 hours and a gradual decline as healing progresses. This timeframe is considered normal and is what clinicians use to counsel patients on what to expect and how to manage it with analgesics. Shorter durations can occur but are less typical, while longer courses—lasting several days beyond this window—are less common and may indicate a greater inflammatory response or other factors. If pain persists beyond a few days or becomes severe, reassessment is warranted.