RCI+Index

RCI Index **-RCI stands for "Root Caries Index"** Category: Indices that are measure in caries experience **Purpose**- Is used to calculate the ration of amount of teeth that have decay at the root of the tooth and/or restorations at the root of the tooth, comparing it to the teeth that have roots that are exposed. **When can this be used-** when measuring the prevalence of dental disease in groups rather than individuals **Procedure** -To figure this out, we would count the number of root caries that are in the mouth and then record a rating for each root surface. **Scoring**: Add numbers of teeth that have decay and root restorations together and then divide that by the total number of teeth that have recession. Once you get that number, you multiply that number by 100.0 to get the minimum score.

**RCI Rating Criteria** No R Root surface with a covered cementoenamel junction and no visible recession R-D Root surface with recession present and root caries present R-F Root surface with recession present and the surface is restored

R-N Root surface with receession but no caries or restorations is present M The tooth is missing **Calculation Formula** R-D + R-F/ R-D + R-F + R-N X100 = **RBI** **Reversible or Irreversible:** Irreversible **Practice Question:** **A 30 year old Hispanic Male has come in for a cleaning. He has been smoking for 10 years. He has a total of 28 teeth. Upon examination it was discovered that he had 1mm of recession with root caries on the buccal of #2, #3, #4, and #5. He also had recession with restored root caries on the buccal of #18, #19, #20, #29, #30, and #31. The rest of the teeth that had recession was on the buccals of #6, #11, and #22-#27. Calculate the RBI.** >
 * Reference: ** Wilkins, E. M. (Ed). Clinical Practice of the Dental Hygienist. 10th edition. Baltimore, MD: Lippincott Williams and Wilkins. 345-346