noun
post crown; dowel crown; false tooth
Dental term for an artificial tooth fixed onto a post inserted into the root. In everyday conversation, 差し歯 is the common word for this type of dental prosthesis.
前歯が折れたので、差し歯にしてもらった。
My front tooth broke, so I had it replaced with a post crown.
差し歯が取れてしまって、歯医者に行かなきゃ。
My false tooth came off; I have to go to the dentist.
noun
tooth of a geta clog
Refers to the raised wooden supports on the sole of traditional Japanese geta sandals. This sense is less common in daily life but appears in contexts discussing footwear.
下駄の差し歯がすり減ってきた。
The teeth of my geta clogs have worn down.
Compound of 差し (sashi, 'inserting') + 歯 (ha, 'tooth'), with rendaku voicing to ば. The dental sense is a straightforward extension of 'inserted tooth', while the geta sense likens the wooden supports to teeth.