Keeping your own tooth is usually preferable when it is realistically restorable. Extraction is not a failure — sometimes it is the more predictable path. The comparison is only useful with the replacement cost included.
Keeps your own root and its bone support. Usually more than one visit. The tooth needs protecting afterwards.
Extraction alone
Fastest and cheapest up front, but leaves a space that has consequences for neighbouring teeth and bite.
Extraction + replacement
Implant, bridge, or partial. Usually the most involved and the most expensive route overall.
Extraction and leaving the space
Sometimes acceptable, sometimes not. Depends on which tooth and your bite.
What tips the decision
How much sound tooth is left after decay or fracture is removed; how much bone support the tooth still has; whether it can be sealed predictably; your bite and grinding habits; and what you want to commit to in visits and cost.
Comparing the price of a root canal against the price of an extraction alone is misleading. Compare it against extraction plus whatever replaces the tooth.
What we can explain here — and what needs an exam
A page can inform you. It cannot examine you.
We can explain online
What each option involves
Why leaving a space has consequences
Why the comparison must include replacement
Determined after an exam
Whether your tooth is restorable
How much support it has left
What each route costs for you specifically
What to do next
Ask for both plans with the replacement included, then decide. This is a decision you are entitled to take time over.