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T Rundcrantz

Publications and source records attributed to T Rundcrantz.

7 recordsLinked to original sources
PubMed2001

A retrospective analysis of factors associated with multiple implant failures in maxillae.

This retrospective study was designed to verify the factors that influence implant failures. Six prosthodontic clinics in Sweden participated in the study, and together they included a total of 54 patients treated between January 1988 and December 1996. All patients were completely edentulous in the maxilla, and received either a fixed prosthesis or an overdenture supported by at least 4 implants (Brånemark System). Half of the patients belonged to the study group, and an inclusion criterion for this group was that they had lost at least half of their implants. To reduce bias, the patients in the control group were matched to the study group, i.e. they were selected so that both groups were as identical as possible. The results of the study indicate that the control group had a better initial bone support than the study group. Furthermore, the patients in the study group suffered from circumstances that could induce implant failure, such as bruxism, personal grief, depression, as well as addictions to cigarettes, alcohol and/or narcotics. On the study form the clinicians were asked to give their own opinion of the reason for implant failure. The answers given could easily be grouped into 5 different topics, and this experience can be useful to improve patient selection. This study suggests that there are certain factors of importance to consider to prevent a cluster phenomenon of implant failures i.e. lack of bone support, heavy smoking habits and bruxism.

Adult↗
PubMed1998

Do healing abutments influence the outcome of implant treatment? A three-year multicenter study.

STATEMENT OF THE PROBLEM: It is not known if healing abutments replaced subsequently with permanent abutments adversely affect the soft tissues and marginal bone levels around dental implants. PURPOSE: This study evaluated the mucosal condition and marginal bone levels 3 years after placement of healing abutments in patients provided with fixed prostheses supported by Brånemark implants. MATERIAL AND METHODS: Data were analyzed retrospectively from 117 patients treated at five centers in which 318 healing abutments were placed on maxillary and 112 on mandibular implants. A prospective 3-year appraisal with a specific protocol assessed the response of mucosal cuffs and marginal bone levels surrounding surviving implants. RESULTS: Exchange of abutments did not affect expected survival rates of implants (94% maxilla, 99% mandible) or produce mean levels of marginal bone loss greater than anticipated for the system. Mean marginal bone levels correlated significantly with the jaw. Most patients achieved good oral hygiene and favorable peri-implant soft tissue health. CONCLUSION: No evidence was found to suggest abutment exchange adversely affects outcome of implant treatment.

Adolescent↗
PubMedDate not supplied

Laser-welded titanium frameworks supported by implants in the edentulous maxilla: a 2-year prospective multicenter study.

PURPOSE: The aim of this study was to evaluate the clinical and radiographic performance of patients who received implants and fixed prostheses with laser-welded titanium frameworks. MATERIALS AND METHODS: Fifty-eight consecutive patients were treated with 349 osseointegrated implants ad modum Brånemark in the edentulous maxilla at 6 implant centers. The patients were randomly arranged into 2 groups at the time of final impression. Twenty-eight patients received laser-welded titanium frameworks and 30 patients received conventional cast frameworks. Clinical and radiographic data were collected for 2 years in function. RESULTS: The 2 groups of patients showed similar results. The 2-year overall cumulative implant survival rate from the time of implant placement and prosthesis insertion was 93.7% and 96.2%, respectively. The corresponding cumulative survival rate for prostheses was 96.6%. Two patients, 1 from each group, failed completely and resumed using conventional complete dentures. The only obvious factor that could possibly be related to the 2 complete failures was a smoking habit. However, it was not possible to significantly correlate implant failures to smoking habits in this study. No fractures were observed in the frameworks or implant components, and both groups experienced the same frequency of resin veneering material fractures. The overall average marginal bone loss was 0.4 mm (SD 0.8 mm). CONCLUSION: Patients treated with implant-supported prostheses fabricated with laser-welded titanium frameworks in the edentulous maxilla presented comparable results to patients with conventional cast frameworks after 2 years in function.

Adult↗