PubMed Health⌕ Search

Biomedical subjects

D A Gelb

Publications and source records attributed to D A Gelb.

9 recordsLinked to original sources
PubMed1993

Hierarchy of objectives in implant placement to maximize esthetics: use of pre-angulated abutments.

Limitations in position, quality, or dimension of bone often require that implants be placed in a nonideal axial inclination. Use of preangulated abutments may be the method of choice when anatomic limitations preclude the axial placement of an implant. This paper discusses the indications for and advantages of the use of preangulated abutments to fulfill esthetic and functional objectives.

Dental Abutments↗
PubMed1993

Immediate implant surgery: three-year retrospective evaluation of 50 consecutive cases.

Since August 1989, 35 consecutive patients were treated with immediate implants to replace 50 teeth requiring extractions as a result of root fractures, endodontic instability, nonrestorable carious lesions, or periodontal disease. Defects relative to the implant were morphologically grouped and were treated for bone regeneration with demineralized freeze-dried crushed cancellous bone (DFDBA), e-PTFE membrane, or both. Thread exposure initially ranged from 4 to 20 threads, while implant lengths varied from 8.5 to 18 mm. The mean implant length was 15 mm, with mean thread exposure of 11.34 threads, or 54% of the threaded length of the implant. Reentry confirmed 100% thread coverage in all but one implant in the no-wall group treated with DFDBA alone. Histologic evaluation of three cases confirmed viability of the regenerated bone. The patients were followed through April 1993, with 49 implants (98%) remaining osseointegrated and functional, supporting the predictability of immediate implant placement. The age of the patients ranged from 16 to 80 years, hence implant placement considerations relative to adolescents are also discussed.

Adolescent↗
PubMed1992

Gelb depth gauge: a diagnostic aid in implant placement.

Case reports describe the use of a radiographic depth gauge in conjunction with computerized axial tomography. This gauge identifies for the surgeon the precise site of implant preparation that will not only be in accord with anatomic vital structures, but also achieve parallelism with adjacent teeth and other implant sites. Discrepancies in angulation can be corrected, and maximum suitable fixture length can be determined.

Alveolar Process↗
PubMed1981

Early re-entry procedure. Part II. A five year histologic evaluation.

The following study was carried out to assess the histologic integrity of a bone graft which had appeared clinically successful at early re-entry some 5 years previously. The tooth required extraction due to a labial root fracture and was subsequently extracted in modified block section, demineralized, sectioned, stained and evaluated histologically. Histologic evaluation revealed the presence of a functional periodontal membrane apparatus in active stages of both bone and cemental remodeling. Necrotic bone spicules within the areas of otherwise viable periodontium suggested residue from prior graft material. Histologic evaluation presented here supports the previous clinical impression that early re-entry of autogenous grafts for evaluation and physiologic recontouring, where indicated, appears justified without apparent adverse effects on local periodontal regeneration.

Alveolar Process↗
PubMed1977

The early reentry procedure.

A technique and rationale for the early reentry of autogenous bone grafts has been described. Rather than wait 1 to 2 years for reentry as has been previously suggested, a 3-month interval was chosen. Results of the study showed: (1) Healing of osseous grafts starts very quickly and we do not have to wait long periods of time to ascertain whether the graft is successful. (2) That all grafts do not fill the defect completely and that there may be an alteration in contour. (3) That it is often important therefore that a reentry procedure be done to contour the bone. (4) Healing after reentry procedure occurred rapidly and uneventfully and minimum sulcular depth was obtained. (5) Reentry of autogenous osseous grafts for evaluation and physiologic recontouring is possible at 3 months without adversely affecting the ultimate clinical maturation and success of the graft.

Bone Transplantation↗