Safe Removal of a Broken Abutment Screw with Customized Drill Guide and Rotary Instrument: A Clinical Report.

This clinical report introduces a method for safe retrieval of a broken implant abutment screw. A reverse-tapping rotary instrument has been introduced in the market and is widely used to retrieve broken screws; however, it is difficult to use the rotary instrument unless an access hole for engagement of the rotary instrument is positioned directly on the center of the top of the broken screw remnant. Poor visibility is another limitation to make an access hole.

Restoration of immediately loaded implants in a minimal number of appointments: a retrospective study of clinical effectiveness.

Purpose: The purpose of this study was to assess the clinical effectiveness of an experimental technique versus the conventional method for the fabrication of implant-supported fixed complete dentures.

Materials And Methods: Between January 2005 and June 2010, edentulous patients who had received rehabilitation by means of nonsegmented fixed implant-supported complete dentures were identified from the pool of individuals treated at Eastman Institute for Oral Health, University of Rochester. Data collection consisted of a chart review and recording of treatment variables in a customized database.

Development of a contemporary animal model of Candida albicans-associated denture stomatitis using a novel intraoral denture system.

Denture stomatitis (DS) is a fungal infection characterized by inflammation of the oral mucosa in direct contact with the denture and affects up to 50% of denture wearers. Despite the prevalence, very little is known about the role of fungal or host factors that contribute to pathogenesis. Recently, we developed a novel intraoral denture system for rodent research.

The influence of verification jig on framework fit for nonsegmented fixed implant-supported complete denture.

Purpose: The purpose of this retrospective study was to assess if there was a difference in the likelihood of achieving passive fit when an implant-supported full-arch prosthesis framework is fabricated with or without the aid of a verification jig.

Materials And Methods: This investigation was approved by the University of Rochester Research Subject Review Board (protocol #RSRB00038482). Thirty edentulous patients, 49 to 73 years old (mean 61 years old), rehabilitated with a nonsegmented fixed implant-supported complete denture were included in the study.

Fracture resistance of composite resin restorations and porcelain veneers in relation to residual tooth structure in fractured incisors.

The aim of the present study was to investigate whether there is a direct correlation between the amount of residual tooth structure in a fractured maxillary incisor and the fracture resistance of composite resin restorations or porcelain veneers after cyclic loading. Sixty human-extracted maxillary central and lateral incisors were mounted in an acrylic block with the coronal aspect of the tooth protruding from the block surface. The teeth were assigned to two groups: 2-mm incisal fracture and 4-mm incisal fracture.

Prospective observation of CAD/CAM titanium-ceramic-fixed partial dentures: 3-year follow-up.

Purpose: There is lack of knowledge about the clinical performance of computer-aided design/computer-aided manufacturing (CAD/CAM) titanium-ceramic-fixed partial dentures (FPDs). The purpose of this study was to evaluate CAD/CAM titanium-ceramic FPDs after 3 years in function.

Materials And Methods: Thirty-one FPDs were fabricated for 23 patients.

The influence of incisal veneering porcelain thickness of two metal ceramic crown systems on failure resistance after cyclic loading.

Statement Of Problem: In some clinical situations, the length of either a prepared tooth or an implant abutment is shorter than ideal, and the occlusal clearance to be restored by a porcelain crown is large. Incisal thickness of the coping and the veneering porcelain should be considered to prevent mechanical failure of the crown.

Purpose: The purpose of this study was to investigate the influence of incisal veneering porcelain thickness of metal ceramic systems on failure resistance after cyclic loading.

Prospective observation of CAD/CAM titanium ceramic single crowns: a three-year follow up.

Statement Of Problem: Computer-aided design/computer-aided manufacturing (CAD/CAM) titanium ceramic restorations were developed with the potential for replacing expensive, high noble metal ceramic restorations. However, there is a lack of information about the clinical performance of CAD/CAM titanium ceramic single crowns.

Purpose: The purpose of this study was to evaluate CAD/CAM titanium ceramic single crowns after 3 years in function.

Ring liner and burn-out temperature affect the clinical time required to fit a cast post.

Statement Of Problem: A cast post that is made with an unlined metal casting ring may exhibit anisotropic shrinkage which could result in distortion and consequently require more chair time for fitting in the root canal.

Purpose: The purpose of this study was to investigate whether the presence of a ring liner and the burn-out temperature of the investment material affect the clinical time required to fit a cast post.

Material And Methods: Sixty identical post patterns were fabricated from a customized stainless steel root form.

The influence of veneering porcelain thickness of all-ceramic and metal ceramic crowns on failure resistance after cyclic loading.

Statement Of Problem: In some clinical situations, the length of either a prepared tooth or an implant abutment is shorter than ideal, and the thickness of a porcelain crown must be increased. Thickness of the coping and the veneering porcelain should be considered to prevent mechanical failure of the crown.

Purpose: The purpose of this study was to investigate the influence of veneering porcelain thickness for all-ceramic and metal ceramic crowns on failure resistance after cyclic loading.

The accuracy of implant impressions: a systematic review.

Statement Of Problem: Various implant impression techniques, such as the splint, pick-up, and transfer techniques, have been introduced, and some techniques may be more accurate than others. Also, clinically, some factors, including the angulation or depth of implants, may affect the accuracy of the implant impressions.

Purpose: The purposes of this review were to: (1) investigate the accuracy of published implant impression techniques, and (2) examine the clinical factors affecting implant impression accuracy.

Oral rehabilitation of a 12-year-old patient diagnosed with a central giant cell granuloma using a fibula graft and an implant-supported prosthesis: a clinical report.

This clinical report describes the oral rehabilitation of a 12-year-old boy with a central giant cell granuloma of the mandible. He underwent en bloc resection of a central giant cell granuloma, free vascularized fibula reconstruction, implant placement, and prosthesis fabrication. The multidisciplinary approach successfully restored function and esthetics.

Effect of subgingival depth of implant placement on the dimensional accuracy of the implant impression: an in vitro study.

Statement Of Problem: In some instances, an implant needs to be placed deep subgingivally, which may result in a less accurate impression of the implant. PURPOSE.: The purpose of this study was to evaluate the effect of subgingival depth of implant placement on the accuracy of implant impressions.

Oral rehabilitation of a completely edentulous epidermolysis bullosa patient with an implant-supported prosthesis: a clinical report.

This clinical report describes the rehabilitation of a completely edentulous 29-year-old man diagnosed with recessive dystrophic epidermolysis bullosa (EB). Four implants were placed in each arch, and metal-resin implant fixed complete dentures were fabricated for both arches. This treatment option appears to be favorable for EB patients, compared to other options involving removable prostheses, in that it causes less mechanical irritation to the oral mucosa.