The root filling and restoration continuum--prevention of long-term endodontic failures.
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A pilot study was carried out in five mandibular primary molars using calcium hydroxide (Ca(OH)2) Paste as root canal filling material to find out an alternative to the routinely used zinc oxide eugenol (ZnOE), which is non-resorbable and causes deflection of succedaneous teeth. The six month clinical and radiographic follow-up carried out at 2 months interval, revealed that the treated teeth with Ca(OH)2 as root canal filling material were successful, showing no pain and tenderness to percussion. A tendency for decrease in size of radiolucency was seen. Two teeth showed complete healing of the periradicular radiolucency. Depletion of Ca(OH)2 paste was seen from the root canals even prior to physiological resorption of roots in 2 out of 5 treated teeth.
Over the years implant companies have provided more and more components to address the varied clinical situations that occur. While these new components have allowed for improved restorative designs, it can now be somewhat confusing to determine the most appropriate components, especially abutments. This article describes restorative steps for both single-implant and multiple-implant restorations; these steps help guide restorative dentists through the treatment process, enabling them to follow standard protocols for single- and multiple-implant restorations. With these protocols it is possible to select the most appropriate components and proceed with treatment in a time-efficient and cost-effective manner.
OBJECTIVE: A general dental practice study investigated the use of a resin-modified glass ionomer material as a transitional restoration and as a core buildup material. The study also assessed a resin-modified glass-ionomer luting system. METHOD AND MATERIALS: Fifty-one badly broken-down vital permanent molar teeth in 44 patients were restored. No dentin pins were placed; however, preexisting pins were retained in 7 teeth. Following baseline and 3-month assessments, complete veneer gold crowns were placed on the selected teeth. The preparations involved ferruling in sound tooth tissue. The completed crowns were reviewed 3 and 12 months after placement. Modified US Public Health Service criteria were used for assessment throughout. Clinical assessment was complemented by examination of photographic records and replicas obtained from silicone impressions. RESULTS: All 51 transitional restorations were found to be clinically satisfactory at the 3-month review. Nineteen (37%) transitional restorations had limited defects that were eliminated in crown preparation. Of the 51 permanent crowns, 46 (90%) were reviewed at 3 months and 44 (86%) at 1 year. All the crowns reviewed at 3 and 12 months were clinically satisfactory. The luting system investigated showed favorable handling characteristics and excellent short-term performance. CONCLUSION: The materials investigated are, over a period of at least 12 months, effective in the restoration of broken-down molar teeth destined to be crowned. With the use of these materials and ferruling, the use of dentin pins may be unnecessary in selected cases.
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This article provides steps to clinical success with indirect partial coverage tooth-colored restorative options. The focus of this article is more on clinical technique rather than specific materials as there are an array of acceptable tooth-colored indirect materials on the market and each comes with specific and detailed manufacturer recommendations.
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The reliability of dental implants results from a combination of design, placement, and reconstructive techniques. Retrospective analysis is one vehicle for evaluating implant success. This article presents the reliability of these techniques in Bicon dental implants. The survivability of this implant was evaluated retrospectively using life table survival analysis over a 10-year period in 13 practices. The parameters used for success included no implant loss, no mobility, no continuing bone loss that did not stabilize after 1 year, no discomfort, and no purulence.
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Modular Transitional Implants (MTI) are made from pure titanium and are used to support fixed provisional restorations during the osseointegration of definitive implants. This study histologically examined the jaw response to loaded MTIs in the dog mandible. Three implants were inserted transmucosally into each side of the mandible in 3 dogs. Stability was examined using a Periotest. Anterior and posterior implants were splinted using a cemented acrylic resin fixed partial denture to allow immediate loading. The middle implant remained unloaded and was used as a control. Dogs were sacrificed 11 to 12 weeks after implantation, and tissue blocks containing the implants were removed. Histologic examination showed that 10 of the 18 implants had good bone-to-implant contact, with the percentage of bone contacting the threaded portion of the implant varying from 30% to 65%. There was no statistical difference (p > 0.1) in percentage of bone-to-metal contact between loaded and unloaded implants. Six implants were entirely surrounded by connective tissue with or without inflammation; two implants were lost during the study. The success rate did not differ between loaded and unloaded implants. In the successful implants trabecular bone made good contact with the implant, forming supporting struts. There was bone remodeling in some bone-to-metal contact areas. It is believed that success was mainly influenced by the initial bone density at the implant site and by the uncontrolled load that the animals applied to the implants during the early healing stage.
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