Yahya bin Abdullah bin Salim said: We were told that with the sword of Sayyiduna Umar (may Allah be pleased with him) were found (written) rulings on diyahs: when a tooth turns black there is the full diyah for it, and if after that it falls out, there is the diyah for it once again.
This report is munqati' (its chain is broken).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / 16269