After tooth extraction due to periodontitis, it is necessary to promptly fit a dental prosthesis. Periodontitis generally involves significant loss of the alveolar bone, leading to tooth mobility and even loss. After extracting a tooth due to periodontitis, it is essential first to observe for three months. After three months, once the absorption of the alveolar bone stabilizes, dental prosthesis can be performed. Temporary restorative measures, such as using temporary teeth, are also an option during this period. Temporary teeth generally require fitting with a permanent prosthesis after three months, at which point the temporary teeth are discarded. After fitting a permanent prosthesis, it is important to avoid hard foods since the jawbone conditions are not ideal due to periodontitis, and chewing hard objects could accelerate the absorption of the alveolar bone. Therefore, after tooth extraction due to periodontitis, temporary teeth can be worn for three months before permanent prosthetic treatment is carried out.