Retention of Bioflx Crowns Compared to Zirconia Crowns on Primary Molars

"prepartion:1.The mesiodistal width of the tooth will be measured using calipers and a closely fitted crown will be selected based on the measurements.~2\. The tooth will be prepared similarly to stainless steel crowns (SSCs):~* Occlusal reduction of approximately 1-1.5 mm will be done using a diamond bur.Mesial and distal reduction of no more than 1 mm will be performed using a No. 169L diamond bur.Depending on the tooth anatomy, either no buccal and lingual reduction will be needed, or a minimal reduction will be done.~ 3.All sharp line angles and corners will be smoothed to ensure proper crown fit.~ 4.The crown will be checked for proper fit before cementation. It will be positioned to extend 1 mm below the gingival margin.~ 5.The crown will be cemented using luting glass ionomer cement (GIC). The crown will be held with firm, constant pressure until the cement sets initially.~ 6.The marginal fit will be evaluated, and necessary adjustments will be made. 7.The occlusion will be checked,"

1\. Crown Selection: The mesiodistal dimension of the corresponding tooth will be measured . to select the appropriate size.2. Occlusal Reduction: The marginal ridge of adjacent teeth will be used as a reference point and a 1.5-2 mm of occlusal reduction will be performed to allow proper crown seating.3. Bucco-Lingual Reduction: The bucco-lingual wall will be reduced by approximately 1-1.5 mm using a flame-shaped diamond bur.4. Interproximal Reduction: 1 mm of interproximal reduction will be performed using a flame-shaped diamond bur such as a .368 or .330 tapered carbide bur.5. Feather Margin Preparation: Subgingival reduction of 1-2 mm will be done using a flame-shaped diamond bur, creating a feathered margin to achieve a passive fit.6. Trial Fitting of the Crown: The crown will be tried in to ensure proper adaptation. until the crown fits passively and extends sub gingivally by 1-2 mm wit.7. Glass ionomer cement will be used for cementation.