3D-Printed Resin Crowns vs Stainless Steel Crowns in Pulpotomized Primary Molars.

Condition(s) studied

Investigational drug(s) / intervention(s)

3D printed resin based crowns: 1-Select an appropriately sized resin-based prefabricated crown based on the mesio-distal width of the tooth. 2-Perform occlusal reduction of approximately 1.5-2.0 mm following the natural occlusal anatomy. 3-Reduce buccal and lingual cusps, central groove, and marginal ridges to achieve adequate occlusal clearance. 4-Perform proximal reduction using a tapered fissure or diamond bur to eliminate mesial and distal contacts by approximately 1.0 mm. 5-Avoid creating ledges or damaging adjacent teeth during proximal reduction. 6-Slightly reduce buccal and lingual surfaces to eliminate undercuts and facilitate crown seating. 7-Round and smooth all sharp line angles and points of the preparation. 8-In cases with adjacent teeth, perform additional interproximal reduction if required for proper seating.9-Try-in the crown intraorally and seat it using firm pressure from lingual to buccal direction. 10-Check marginal adaptation, ensuring slight subgingival extension (approximately 0.5-1.0 mm).

Prefabricated stainless steel crowns: 1-Select an appropriately sized stainless steel crown based on the mesiodistal width of the tooth. 2-Perform minimal occlusal reduction (approximately 1.0-1.5 mm) following the anatomical occlusal contour to create suficient space for crown placement. 3-Lightly reduce proximal contacts to allow crown seating, without creating steps or excessive taper. 4-Perform minimal buccal and lingual reduction only if required to eliminate undercuts and facilitate passive seating. 5-Round sharp line angles and smooth rough surfaces to allow proper adaptation. 5-Verify adequate occlusal clearance and passive path of insertion. 6-Try-in the crown and adjustsize if necessary to ensure proper fit. 7-Trim and contour crown margins to achieve optimal gingival adaptation (if needed). 8-Seat the crown firmly using finger pressure to confirm complete seating. 9-Cement the crown with glass ionomer cement and remove excess cement after initial setting.

Study summary

The goal of this clinical trial is to learn whether 3D-printed resin-based crowns are an effective alternative to stainless steel crowns for restoring pulpotomized primary mandibular molars in children. The main questions it aims to answer are:

Do 3D-printed resin-based crowns provide better gingival health than stainless steel crowns? Are there differences in plaque accumulation, crown retention, and child and parent satisfaction between the two crown types?

Participants will:

Receive either a 3D-printed resin-based crown or a stainless steel crown after pulpotomy.

Attend follow-up visits for clinical evaluation over 12 months.

Eligibility

Primary outcome measure(s)

• Gingival index — baseline, 3 months, 6 months, 9 months, 12 months
  The GI was measured by passing an explorer tip gently within the sulcus mesial, distal, buccal, and lingual surface of each crowned molar. it was scored on a scale of 0 to 3 0= no bleeding 1. only one bleeding point appearing someseconds after probing 2. bleeding points appearing immediately after probing 3. profuse bleeding appearing immediately after probing spreading towards the marginal gingiva

Trial sites (1)

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