OHI-S+Index

OHI-S Index Simplified Oral Hygiene Index This index is an __oral hygiene__ index = = It is used to evaluate OH status by providing an estimation of tooth surfaces covered by debris and/or calculus. There are two parts to this index, which can be used separately or together:
 * ==DI-S (Simplified Debris Index) ==
 * ==CI-S (Simplified Calculus Index) ==

When you add them up, the total becomes your __OHI-S__ score This index is __reversible__, can be changed, and will decrease or increase depending on the patient's oral hygiene habits and technique.

* * * __Step 1: Identify the teeth to be used (6 teeth total are chosen) __
 * ===__Posterior teeth__: On both the maxilla and the mandible, choose the first fully erupted tooth distal to the 2nd premolar (typically a first molar, but can also be a second or third molar) on the right and the left.===
 * ===on the maxilla, evaluate the facial surface===
 * ===on the mandible, evaluate the lingual surface===

==== ====
 * ===__Anterior teeth__: Use the facial of tooth #8 (if missing, use #9) on the maxilla===
 * ===Use the facial of tooth #24 (if missing, use #25) on the mandible===
 * ===Include the interproximal surfaces up to the contact===

At least two of the surfaces used must be examined and scored individually to calculate OHI-S ==== ====

__Step 2: Evaluate __
 * === __ Debris Score (DI-S) :__ run the tip of your probe along the tooth surface looking for biofilm, materia alba, and food debris ===
 * Scoring:
 * ===0= no debris or stain===
 * ===1= soft debris __not__ covering more than 1/3 of the tooth surface, or __any amount__ of extrinsic staining without debris present===
 * ===2= soft debris that covers __more__ than 1/3 of the tooth surface but not more than 2/3===
 * ===3= soft debris covering __more__ than 2/3 of the tooth surface===


 * === __ Calculus Score (CI-S) :__ use an explorer to estimate surface area covered by supragingival calculus. Record only definite areas of calculus noted. ===
 * ===Scoring:===
 * ===0= no calculus present===
 * ===1= supra calculus covering not more than 1/3 of the tooth surface===
 * ===2= supra calculus covering more than 1/3 of the tooth surface but not more than 2/3 (includes presence of small pieces around the cervical area of the tooth)===
 * ===3= supra calculus covering more than 2/3 of the tooth surface or a continuous ring of calculus around the cervical area of the tooth===

__Step 3: Add up the results __
 * __ DI-S __ = __total debris score__
 * 1) of teeth evaluated (which is usually 6)


 * ==__ CI-S __ = __total calculus score__==
 * 1) of teeth evaluated (which is usually 6)


 * ==Complete __ OHI-S __ = DI-S + CI-S ==

0= excellent oral hygiene  0.1-1.2= good oral hygiene   1.3-3.0= fair oral hygiene   3.1-6.0= poor oral hygiene

You can also score groups by adding up individual scores and then dividing by the number of individuals.

* * * ==This index is good to use clinically in order to place patients into a "category" of oral hygiene status. For example, on the initial visit a patient may have poor oral hygiene according to his or her OHI-S score. However, it could become a motivational goal to improve the patient's oral hygiene to good or excellent over time. Another setting in which this index is useful is when measuring the OH status of groups of people such as in clinical studies and research, school programs, hospitals, and nursing homes. ==

Asia B. Hernandez 28 Reference: <span style="color: #000000; font-family: Georgia,serif; font-size: 17.33px;">Wilkins, Esther M. Clinical Practice of the Dental Hygienist. 10th edition. Baltimore, MD: Lippincott Williams and Wilkins. 333-335.