Prefabricated CAD/CAM PEEK Crowns For Primary Molars Restoration

0 = No gingival inflammation.

1. = Mild inflammation with slight changes in color and texture affecting part of the marginal gingiva or papilla.
2. = Mild inflammation with changes in color and texture involving the entire marginal gingiva or papilla.
3. = Moderate gingival inflammation with obvious redness, surface glazing, edema, and/or enlargement of the marginal gingiva or papilla.
4. = Severe gingival inflammation with marked redness, edema and/or enlargement of the marginal gingiva or papilla, spontaneous bleeding, and ulceration.

0 = No plaque accumulation around the gingival margin.

1. = Slight plaque accumulation detected only by passing a probe.
2. = Moderate plaque accumulation visible to the naked eye.
3. = Heavy plaque accumulation on the crown surface, gingiva, and interdental areas.

Bleeding on probing is assessed using a Williams periodontal probe inserted into the gingival sulcus around each crowned tooth. Four sites (mesial, distal, buccal, and lingual) are examined, and bleeding is evaluated 10 seconds after probing as follows:

(-) No bleeding. (+) Bleeding present.

A Wong-Baker Faces Scale consisting of six expressive faces is used, ranging from "no hurts" to "hurts worst," to facilitate the child's selection of the appropriate face. The scale ranges from 0 to 10.

The child is given a questionnaire displaying the faces immediately after crown placement and is asked to choose the face that best represents their feeling at that moment. The child indicates the selected face by pointing to it, and the response is recorded in the study form.

Color stability is assessed using a shade guide as a reference standard. The crown color is compared with the shade guide at each follow-up visit (3, 6, and 12 months) according to the following criteria:

0 = No color change.

1. = Slight change from the original color.
2. = Unacceptable color change.

The clinical condition of the crown is evaluated during follow-up visits according to the following criteria:

0 = No visible fracture.

1. = Minor crown fracture that is repairable.
2. = Major crown fracture that can still be repaired.
3. = Crown loss and exclusion from the study sample.

Marginal adaptation discrepancies were evaluated clinically using a sharp explorer and direct visual examination under dental operating light According to the modified United States Public Health Service (USPHS) criteria; (A): An Alpha grade represented a clinically ideal restoration with excellent marginal adaptation, no detectable gap on exploratory examination.

(B): A Bravo grade indicated a clinically acceptable restoration with a slight marginal discrepancy detectable by an explorer, but without dentin exposure.

(C): A Charlie grade was assigned to restorations that were clinically unacceptable due to a definite marginal gap, with exposed dentin.

(D): A Delta grade denotes the worst clinical condition, characterized by gross marginal failure, loss of retention, or other major defects, for which complete replacement of the restoration is required.

The child and one parent are asked about their satisfaction with the crowns regarding esthetics and function, and the responses are recorded in the patient form. Evaluation is performed as follows:

1. = Completely satisfied with both esthetic and functional outcomes.
2. = Satisfied with esthetic and functional outcomes with a minor remark.
3. = Minor criticism without negative clinical effects or esthetic defects.
4. = Desire for improvement in esthetic and functional aspects.
5. = Completely dissatisfied.