Objective:The purpose of the current study was to evaluate the fracture resistance of pulpotomized primary molars restored using hybrid ceramics endocrowns and prefabricated zirconia crowns. Materials and methods: Eight freshly extracted human mandibular second primary molars underwent pulpotomy procedure. Teeth were randomly divided into two groups according to the type of coronal restoration: Endocrown (EC) group (n=4) restorations made of CAD/CAM Milled Hybrid Ceramic blocks (VITA ENAMIC), and Zirconia crown (ZC) group (n=4) restored by prefabricated zirconia crowns (Nu Smile). A universal testing machine was used to evaluate fracture resistance of tested specimens. Results: There was no statistically significant difference (P=0.074) in the mean fracture resistance for EC group (1968.6±985.4) compared to the mean fracture resistance for the ZC group (890.9±142.5). Conclusion: Endocrowns can be used as a treatment option in pulpotomized primary molar teeth. VITA ENAMIC endocrowns can withstand the maximum intraoral masticatory force in the primary molars.
Objective: Pulptomy and pulpectomy usually are the most common techniques for pulp therapy in primary teeth. Despite the relative ease of performing these techniques, iatrogenic errors such as furcal perforation may occur. MTA and Biodentine were selected to test their ability to repair the furcal perforation in primary molars. Subjects and Methods: thirty patients with thirty accidently furcally-perforated primary molars discovered and sealed immediately on the same visit with either Biodentine or MTA, then completed by conventional pulp therapy treatment either by pulptomy or pulpectomy. The trated primary molars were then followed up clinically and radiographically for 12 months. Result: both materials showed high success rates, the first group of MTA showed 100% success, while the second group of Biodentine showed (93.3%) success with no significant difference (p= 1.000). Conclusion: MTA and Biodentine can successfully be used in treatment of iatrogenic recent furcal perforations that may occur during pulpotomy in primary molars.
Objective: Pulpotomy and pulpectomy usually are the most common techniques used in pulp therapy for primary teeth and despite the relative ease of performing this techniques iatrogenic errors may. Furcal perforation of common errors can be occurred during performing pulp therapy in primary molars. Two types of furcal perforation were selected according to time factor elapsed since their occurrence (recent and long standing) and these types of perforation treated with MTA. This study was directed to evaluate the ability of MTA to treat furcal perforation in primary molars regarding the time factor Subjects and Methods: thirty patients were selected 15 with accidently recently ( group A) furcally perforated molars and 15 with long standing old perforation (group B), and the two types sealed with MTA and then completed by conventional pulp therapy treatment either by pulpotomy or pulpectomy for group A , and pulpectomy for group B, then they followed up clinically and radiographically for 12 months. Result: there was statistically significant difference in success incidence between the two groups (p=0.014); being higher in recent perforation. For long standing perforation; 10 patients out of 15 patients (66.7%) showed success; while in recent perforation; 15 patients (100%) showed success. Conclusion: recent type of perforation which repaired at the same visit has a higher success rate and better prognosis than old type or long standing in primary molars
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