Replacement of the extracted tooth is important as it promotes your adjacent tooth too tilt and the upper ipsilateral tooth to move downwards.Due to that phenomenon bone loss can also occurs, and creates food lodgement which is favorably the bacterial growth and infection. But the exact condition and diagnosis can be decided on the basis of thorough dental check up and X-ray examination. Then only a proper treatment plan can be done.

To know the cause of pain in adjoining area,get a thorough clinical check up done and get xray of the teeth.get tooth cleaned.if decayed, get it filled. Get missing tooth replaced with implant,if there's sufficient bone support. For any further assistance, you can consult through this.

Hii.. Replacement of the teeth is must. & This is your most functioning teeth in terms of chewing. You should get it replaced as soon as possible because tilting of the adjacent teeth is one of the consequences of missing teeth. & The pic is not clear to judge about your current pain. I need to have more history from you then only I can suggest a proper diagnosis.

Hello This is the 1st molar tooth which you got removed(extracted). You should get it replaced asap as this is one of the main tooth in the mouth which takes most of the load of chewing. The best option to get it replaced is Implant as you already know. For better understanding of your problem and to know more about other economical options for tooth replacement we can consult over a video call and thn we can help you with the best treatment modality for you.