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Gregg A Helvey

Publications and source records attributed to Gregg A Helvey.

7 recordsLinked to original sources
PubMed2006

Press-to-zirconia: a case study utilizing cad/cam technology and the wax injection method.

Computer technology is increasingly becoming an effective tool in restorative dentistry. Whether chairside or laboratory-fabricated, computer-aided design/ computer-aided manufacturing (CAD/CAM) engineering has become widely accepted in the fabrication of dental restorations. Zirconia has been successfully used in medical therapy and is now considered a viable alternative to metal as a substrate in single- and multiple-unit fixed restorations. Proper tooth preparation and handling of this material is essential for a successful outcome. This presentation will discuss how CAD/CAM systems can utilize zirconia frameworks to provide treatment of a maxillary anterior restoration.

Computer-Aided Design↗
PubMed2002

Retrofitting crowns to an existing removable partial denture clasp: a simple technique.

The fabrication of a new crown to replace an existing abutment tooth for a removable partial denture is one of the most labor-intensive chairside and laboratory procedures. The process can become more complicated when the patient requests a tooth-colored esthetic restoration. Numerous techniques are described in the literature, some for all-metallic restorations and others for metal-ceramic restorations. This article describes a simplified technique that makes use of a polymer ceramic material.

Crowns↗
PubMed2002

Closing diastemas and creating artificial gingiva with polymer ceramics.

A 40-year-old male patient elected orthodontic correction of his crowded anterior teeth, leaving multiple root exposures and spacing in the papilla areas. Connective tissue surgery did not satisfy the patient's expectations and led him to seek alternative treatments. An innovative technique was developed to achieve root coverage and fill-in spaces in the papilla areas. This noninvasive technique used a polymer ceramic material that was bonded to the crown and root surface of the individual teeth. The veneer restorations were inserted on the teeth as a solid unit, then separated into individual units. Clinically, the hygiene, which has been monitored since the placement of the restorations 24 months ago, has been satisfactory. This case illustrates an attenuation of a previously described noninvasive laboratory technique to close spaces between teeth. This conservative method can be used to cover denuded root surfaces that may exhibit sensitivity. Although the treatment has been successful for the short-term, the results are promising and deserve further case-controlled clinical assessment.

Adult↗