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Biomedical subjects

G M Reiser

Publications and source records attributed to G M Reiser.

9 recordsLinked to original sources
PubMed1998

Implants in regenerated bone: long-term survival.

This retrospective multicenter study analyzed 526 implants placed and loaded in regenerated bone. Both autogenous and allogeneic bone grafts were used in combination with a barrier membrane to reconstruct bone using either a simultaneous or staged approach. Implants were followed from 6 to more than 74 months postloading. Eight of the implants were lost, for a success rate of 97.5%. The type of graft material did not affect the clinical success of the implants, nor did the use of submerged versus nonsubmerged implants or a staged versus a simultaneous approach. In conclusion, regenerated bone reacted to implant placement in a manner that was clinically similar to native bone.

Adolescent↗
PubMed1996

The subepithelial connective tissue graft palatal donor site: anatomic considerations for surgeons.

Surgeons must become completely familiar with the anatomy of the palatal donor site to feel confident in providing the subepithelial connective tissue graft procedure. Variations in the size and shape of the hard palate affect the dimensions of donor tissue harvested, as well as the location of the greater palatine neurovascular bundle. This article classifies palatal vaults according to height as high, average, and shallow. Illustrations and cadaver dissection are utilized to demonstrate that surgeons can gain substantial donor tissue specimens without encountering the neurovascular bundle. Actions to be followed in the unlikely event that the neurovasculature is encountered are reviewed.

Connective Tissue↗
PubMed1995

The implant periapical lesion: etiology, prevention, and treatment.

A classification of implant periapical lesions that separates them into inactive and infected has been suggested. The inactive form is likely to be an apical scar, resulting from a residual bone cavity created by placing an implant that was shorter than the prepared drill site. The infected focus probably occurs when an implant apex is placed in proximity to an existing infection or when a contaminated implant is placed. Bone necrosis caused by overheating during preparation may also be a causative factor. Suggested preventions of implant periapical lesions include careful management of contaminants and heat generation during implant surgery. Treatment varies according to the type of lesion. The inactive type is observed and monitored. The infected type requires surgical intervention, elimination of the infection, and an implant apical resection or implant removal depending on the extent of the infection and the stability of the implant.

Bacterial Infections↗
PubMed1992

Initiating restorative procedures at the first-stage implant surgery with a positional index: a case report.

With the use of a positional index, the restorative dentist and laboratory technician can be provided with an accurate record of implant fixture location after first-stage surgery. Thus it is possible to fabricate a master cast with implant analogs and initiate laboratory procedures immediately after first-stage surgery, and a provisional restoration can be processed and delivered at the time of second-stage surgery. A case report is presented to illustrate the technique.

Dental Casting Technique↗
PubMedDate not supplied

Evaluation of maxillary sinus membrane response following elevation with the crestal osteotome technique in human cadavers.

Implant placement in the posterior maxilla often requires elevation of the sinus floor, which can be achieved through either the modified Caldwell-Luc or the crestal osteotome technique. The objectives of this study were to evaluate (a) the resistance to perforation of maxillary sinus membranes obtained from formaldehyde-fixed cadavers in vitro, (b) the frequency and extent of membrane perforations occurring after sinus floor elevation in cadavers using the crestal approach, and (c) the amount of membrane elevation (doming) that can be achieved using the crestal approach. Pretreatment of maxillary sinus membrane tissues with commonly used tissue softeners did not have a statistically significant effect on resistance to perforation. Maxillary sinus membranes were elevated 4 to 8 mm in formaldehyde-fixed cadavers using the osteotome technique; implants were placed. Of the 25 sites that received implants, only 6 showed perforations, as assessed by double-blind investigation after dissection of the lateral wall of the nose, allowing direct examination of the sinus cavity. Perforations were categorized as Class I (< or = 2 mm with exposure of the implant into the sinus cavity and loss of doming); Class II perforations (> or = 2 mm) were associated with proximity of the osteotomy site to the medial wall of the sinus or the presence of septae. These results indicated that the crestal osteotome approach compared favorably to the modified Caldwell-Luc technique as it relates to the frequency of maxillary sinus membrane perforations and the degree of achievable membrane elevation.

Biocompatible Materials↗