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George Zarb

Publications and source records attributed to George Zarb.

7 recordsLinked to original sources
PubMed2002

A 5-year prospective study of implant-supported single-tooth replacements.

OBJECTIVE: Because osseointegration has been successful in the management of completely edentulous patients, it is tempting to extrapolate these results and infer the success of single-tooth replacement. Yet there are major clinical differences between edentulous and partially edentulous patients. This prospective study is a follow-up to one started at the University of Toronto in 1986. The purpose of this study was to continue longitudinal assessment of implant-supported single-tooth replacements. METHODS: The original study comprised 42 consecutively treated patients with a total of 49 implants. The patient group consisted of all University of Toronto patients treated with single Br nemark implants whose treatment had been completed more than 5 years previously (i.e., before 1994). No exclusion criteria applied. One implant was not osseointegrated at the time of stage 2 surgery, and 6 patients with reportedly successful osseointegrated implants were not available for recall. For the preparation of this report, 30 of the remaining 42 implants were assessed during recall examinations. Assessment of success was based on published criteria. In addition, soft-tissue appearance, implant immobility, occlusal contacts in centric occlusion and excursions, proximal contacts, tightness of crown and abutment screws, and patients' responses on satisfaction questionnaires were evaluated. RESULTS: The criteria defining success of treatment in implant prosthodontics were met by all 30 of the single-tooth implants, which had been in place for 5 or more years. Each implant was immobile, and each had a mean vertical bone reduction of less than 0.2 mm annually. CONCLUSION: Stable long-term results can be achieved with single Brånemark implant-supported crowns.

Adult↗
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Meetings and a goodbye.

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Congresses as Topic↗
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The effect of smoking on osseointegrated dental implants. Part II: Peri-implant bone loss.

PURPOSE: The detrimental effect of cigarette smoking on implant survival has been previously demonstrated. The purpose of this study was to retrospectively investigate the effect of smoking on marginal bone loss around endosseous dental implants. MATERIALS AND METHODS: The sample consisted of 767 Brånemark implants placed in 235 patients between 1979 and 1999. Bone level changes were determined using periapical radiographs taken at annual recall visits for 1 to 20 years following prosthesis insertion. Nonparametric tests and multiple linear regression were used to determine the influence of various factors on peri-implant bone loss during the first year of clinical loading and for all subsequent years. RESULTS: The mean annual bone loss was 0.178 mm +/- 0.401 during the first year of clinical loading and 0.066 mm +/- 0.227 per year thereafter. A positive smoking history was associated with a higher rate of peri-implant bone loss, and the majority of implant failures were observed in this group of patients. Smoking at the time of stage 1 surgery did not appear to predispose implants to more marginal bone loss. CONCLUSION: Cigarette smoking should not be an absolute contraindication for implant therapy; rather, long-term heavy smokers must be informed that they are at a slightly higher risk of late implant failure and are susceptible to more marginal bone loss over the long-term, irrespective of their smoking status at the time of implant placement.

Adolescent↗