In vitroanalysis of the marginal adaptation and discrepancy of stainless steel crowns

Abstract

Aim: The purpose of the study was to assess the marginal adaptation and discrepancy of SSC’s. Differences in adaptation and discrepancy between the four surfaces (mesial, lingual, distal, and buccal) were evaluated. Methods: The placement of stainless steel crowns were completed on a phantom head in accordance with the clinical technique. The ideal tooth preparation was made and this ‘master tooth’ duplicated to achieve a sample size of 15. The stainless steel crowns were placed, trimmed, and cemented as per the clinical technique. The cemented stainless crowns were analyzed under 100× stereomicroscope magnification. The marginal adaptation and discrepancy of each specimen was measured every 2 µm. Results: All the specimens showed marginal adaptation and discrepancy. The lingual margin had a significantly better adaptation (p < .0001) over the other surfaces. The buccal surface was the only surface that had an appropriate supra-CEJ level with a significance of p < .0001. Conclusion: The marginal discrepancies occur during the trimming procedure and assessment of the gingival approximation of the SSC margin. The inspection of stainless steel crown adaptation and discrepancy is an essential clinical step.

In vitro comparison of marginal and internal fit between stainless steel crowns and esthetic crowns of primary molars using different luting cements

“…First primary molars have crown bulges particularly cervically on the buccal surface which can create areas of undercuts that may compromise SSC adaptation despite the contouring and crimping since the buccal surface is not commonly involved in SSC preparation. [19] As opposed to SSC preparations, zirconia crown preparations are significantly more aggressive, and as per the manufacturers' instructions, they involve all tooth surfaces; consequently, any coronal bulge will be removed and crown adaptation will be improved.…”

Longevity of stainless steel crowns as interim restorations on young permanent first molars that have undergone vital pulp therapy treatment in children and factors associated with their treatment failure: A retrospective study of up to 8.5 years

“…The trimmed margins were then smoothed and polished. To increase SSC retention and seal, the SSC margin should be approximately 1 mm subgingivally 18–21 . The contour and crown margin were adapted as much as possible using crown pliers (3M™ ESPE™ Crown Crimping Plier, 800 417 and 3 M™ Crown Contouring Plier, 800 112) to form a tightly fitting crown.…”

“…The contour and crown margin were adapted as much as possible using crown pliers (3M™ ESPE™ Crown Crimping Plier, 800 417 and 3 M™ Crown Contouring Plier, 800 112) to form a tightly fitting crown. The crown was seated by the operator using a bite stick and assessed for proper occlusion, contacts (if any), and marginal adaptation by visual–tactile examination with a dental explorer and bitewing radiograph prior to cementation 18,22–24 . The crown was cemented with resin‐modified glass–ionomer cement (Rely X™ Luting 2; 3M™ ESPE™), and excess cement was carefully removed using wet gauze, explorer and knotted floss.…”

Çocuk Hastalarda Kullanılan Kuron Restorasyonlar

“…Madde kaybı fazla olan süt dişlerinde kuron restorasyonlarının tercih edilmesi daha doğru bir yöntem olarak görülmektedir. Böylece süt dişlerinin mezio-distal boyutunun korunması, dişin yapısal bütünlüğünün korunması, biyouyumlu olması ve dişin kullanım ömrünün artması sağlanabilmektedir (4).…”