This kind of trauma leads to a long process of observing whether the pulp is necrotic or not, because the pulp is in a state of "shock" after trauma, and it is not convenient to detect the activity (normal pulp responds to cold and heat). Therefore, only through time observation, it is good to go to the hospital to test the pulp activity in March, June and September after trauma.
If the pulp is really necrotic, the problem of teeth blackening will indeed occur over time (mainly in the middle part of the teeth, not the whole teeth). At this time, root canal therapy is needed. After being treated in a regular hospital (specialized stomatological hospital is not just any city hospital), there is no need to worry about ineffectiveness. I want to know how much it costs in Beijing. The total cost of root canal treatment of Huaxi incisors is about 400-600.
After root canal therapy (after pulp death), dentinal tubules will gradually close under the condition of lack of nutrition, resulting in poor light transmission of teeth. So make porcelain teeth to maintain your beauty and the strength of the remaining tooth tissue.
As for the problem that you can't laugh when you have dentures, all-ceramic teeth are basically genuine now (provided that your own occlusion and economic situation allow). So don't worry too much about not laughing.
Good luck is for reference only. Please consult your doctor for details.