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Papers by W Zaripah W Bakar

Indian journal of dental research : official publication of Indian Society for Dental Research

Posts and cores are often required for restoration of pulpless teeth and to provide retention and... more Posts and cores are often required for restoration of pulpless teeth and to provide retention and resistance for a complete crown, but conventional posts may increase the root fracture. This study was performed to compare the root fracture resistance of extracted teeth treated with different fibers reinforced with composite posts and treated teeth with conventional post and core systems. Root canal therapy was performed for 50 mandibular first premolars. The coronal portion of each tooth was amputated, and five post and core systems (cast, polyethylene woven, glass, carbon, and quartz fiber posts) were compared. Acrylic resin blocks were used for mounting, using a layer of elastomeric impression material covering the roots. The load was applied axially and measured with a universal testing machine. Significantly, cast posts and cores had a higher failure threshold including teeth fracture; whereas, fiber posts failure was due to core fracture, with or without fractures in coronal po...

Bangladesh Journal of Medical Science, 2013

Introduction: Composite resin (CR) is among the commonly used material for intraradicular reinfor... more Introduction: Composite resin (CR) is among the commonly used material for intraradicular reinforcement of weakened tooth roots. Purpose: This study was to compare the fracture resistance of experimentally weakened tooth roots reinforced using auto-polymerized composite resin and light-polymerized composite resin. Materials and Methods: Fifty-six extracted human maxillary incisors were divided into 2 groups (n = 28) and the root canals were over prepared to weaken it. The samples in Group A were restored using lightcured CR Z100 and light-transmitting polymerizing post (Luminex), whereas Group B using auto-cured CR Alpha-dent. Both groups were placed with metal parapost cemented with a resin luting cement (Nexus 2). Specimens were subjected to compressive load (N) using Instron machine until fracture. Data were submitted to independent t test analysis of variance (p < 0.05). Results: There was no significant difference (p = 0.233) in fracture resistance between the teeth reinforced with light-polymerizing and auto-polymerizing CR are 549.3 (± 95.44) and 490.7 (± 110.37) respectively. Conclusion: The use of less technique sensitive autopolymerizing CR give equivalent benefit effect on reinforcing weakened roots, as the more commonly lightpolymerized composite resin.

Health and Quality of Life Outcomes, 2013

dental.usm.my

... Suhaida Sabdi, Wan Zaripah Wan Bakar *, Adam Husein ... that can cause microleakage includes ... more ... Suhaida Sabdi, Wan Zaripah Wan Bakar *, Adam Husein ... that can cause microleakage includes polymerization shrinkage of adhesive restorations (Rees and Jacobsen, 1989), thermal expansion and water absorption (Retief, 1994), mechanical loading (Trowbridge, 1987; Hilton ...

Australian Endodontic Journal, 2009

The aim of this study was to evaluate in vitro the apical sealing ability of cold lateral and sys... more The aim of this study was to evaluate in vitro the apical sealing ability of cold lateral and system B root filling techniques using dye penetration. Eighty-six extracted single-rooted human teeth were prepared and randomly divided into two experimental groups to be obturated by cold lateral condensation (n = 33) and system B (n = 33). The remaining 20 teeth served as positive and negative controls. The roots were embedded for 72 h in methylene blue dye solution and sectioned transversely for dye penetration evaluation using stereomicroscope. The results of this study showed that cold lateral condensation leaked significantly more (P &amp;amp;amp;amp;amp;lt; 0.001) than system B technique.