Furcation Involvement
Pronunciation: fur-KAY-shun
A clinical finding indicating that periodontal bone loss has extended into the area where a multi-rooted tooth's roots diverge, classified in grades (I–III).
Full Definition
Furcation involvement describes the degree to which the bifurcation or trifurcation of a multi-rooted tooth has been compromised by bone and attachment loss. It is graded on a scale—most commonly Class I (early, probe tip just enters), Class II (partial penetration), and Class III (through-and-through)—and is a critical data point on periodontal charts. Editors working on dental insurance narratives must render these grades consistently; mixing Roman and Arabic numerals within the same document is a common error. The finding directly influences which CDT codes are defensible for surgical or non-surgical periodontal therapy. It is relevant only to multi-rooted teeth: molars and some premolars.
Usage
Usage note: Always pair with the specific tooth number and the Roman numeral class. Avoid the informal shorthand 'furation' or 'furc'.
In Context
- "The narrative must specify Class II furcation involvement on tooth #19 to justify the submitted surgical code." — Dental insurance narrative
- "Editors should use Roman numerals (Class I, Class II, Class III) when transcribing furcation involvement data from handwritten notes." — Style guide for dental documentation