Biomedical subjects

Anders Ekfeldt

Publications and source records attributed to Anders Ekfeldt.

5 recordsLinked to original sources

PubMed2002

Microbiological findings and host response in patients with peri-implantitis.

The aim of the present study was to characterise microbiota and inflammatory host response around implants and teeth in patients with peri-implantitis. We included 17 partly edentulous patients with a total of 98 implants, of which 45 showed marginal bone loss of more than three fixture threads after the first year of loading. Nineteen subjects with stable marginal tissue conditions served as controls. Oral hygiene, gingival inflammation, and probing pocket depth were evaluated clinically at teeth and implants. Microbiological and crevicular fluid samples were collected from five categories of sites: 1) implants with peri-implantitis (PI), 2) stable implants (SI) in patients with both stable and peri-implantitis implants, 3) control implants (CI) in patients with stable implants alone, 4) teeth in patients (TP) and 5) controls (TC). Crevicular fluid from teeth and implants was analysed for elastase activity, lactoferrin and IL-1 beta concentrations. Elastase activity was higher at PI than at CI in controls. Lactoferrin concentration was higher at PI than at SI in patients with peri-implantitis. Higher levels of both lactoferrin and elastase activity were found at PI than at teeth in patients. The concentrations of IL-1 beta were about the same in the various sites. Microbiological DNA-probe analysis revealed a putative periodontal microflora at teeth and implants in patients and controls. Patients with peri-implantitis harboured high levels of periodontal pathogens, Actinobacillus actinomycetemcomitans, Porphyromonas gingivalis, Prevotella intermedia, Bacteroides forsythus and Treponema denticola. These findings indicate a site-specific inflammation rather than a patient-associated specific host response.

Aged↗

PubMedDate not supplied

Implant-supported fixed partial prostheses: a retrospective study.

PURPOSE: The purpose of this retrospective study was to present treatment outcome and patient reactions to rehabilitation with implant-supported fixed partial prostheses. MATERIALS AND METHODS: Eighty-three patients were consecutively treated with implant-supported fixed partial prostheses (Brånemark system) from 1986 to 1995. Seventy-six of these 83 patients were examined (66 maxillary and 31 mandibular prostheses). The mean observation time was 53.9 months. In total, 285 implants were placed. Eleven implants were lost before loading. The first 41 prostheses were removed and the implants examined regarding the criteria for "success" and tightness of the screw joints. Only one implant had lost integration. RESULTS: The survival rate before and after loading was 96%, which included implants placed in augmented bone. All prostheses were stable at the time of examination. In prostheses with cantilevers (98 implants), 12% of the gold screws and 17% of the abutment screws showed a "not acceptable" loosening, compared to none in the prostheses without cantilevers (17 implants). The difference was not statistically significant. The mean marginal bone loss was 0.4 mm for the first year after prosthesis insertion and less than 0.1 mm per year in the following years. The most frequent prosthesis design was one pontic supported by two implants. Prostheses made in gold acrylic and titanium acrylic had more complications and showed a higher need for repair than metal-ceramic restorations. Patients reacted very positively to the esthetic results and comfort with eating, and were overall satisfied with their prostheses. CONCLUSION: Implant-supported fixed partial prostheses seem to have a very good prognosis and are well-accepted by patients.

Acrylic Resins↗

PubMedDate not supplied

Peri-implant mucosal level in patients treated with implant-supported fixed prostheses: a 1-year follow-up study.

PURPOSE: The purpose of this follow-up study was to quantify the change in the peri-implant mucosal level after treatment of edentulous patients with fixed prostheses on osseointegrated endosseous implants. MATERIALS AND METHODS: Twenty patients were included in the study: 10 were treated in the maxilla, and 10 were treated in the mandible. Both groups had fixed prostheses on osseointegrated Brånemark implants. Peri-implant mucosal level was measured with a calibrated probe after removal of the prostheses at the 1-year follow-up. These measurements were compared to those made on the original master casts. RESULTS: A larger mean retraction (-) was observed in the mandible (-1.6 mm) compared to the maxilla (-0.8 mm), but there was great variation. The individual values varied from -4.5 to +1.0 mm in the mandible and from -6.0 to +6.0 mm in the maxilla. CONCLUSION: Peri-implant soft tissue recession occurs during the first year in edentulous jaws after treatment with implant-supported fixed prostheses and more so in the maxilla than the mandible.

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PubMedDate not supplied

Stability of the screw joints in patients with implant-supported fixed prostheses in edentulous jaws: a 1-year follow-up study.

PURPOSE: The purpose of this follow-up study was to evaluate the stability of the screw joint in edentulous patients 1 year after treatment with implant-supported fixed prostheses (Brånemark system). MATERIALS AND METHODS: A total of 20 patients were included, 10 treated in the maxilla and 10 in the mandible. The fixed prostheses were removed approximately 1 year after insertion, and the stability of the screw joints was evaluated using a rating scale based upon the CDA quality evaluation criteria of dental care. RESULTS: All implant-supported fixed prostheses were recorded as stable before the prosthetic screws (gold screws) were unscrewed. "Unacceptable loosening" was observed in 4% of the prosthetic screws and in 29% of the abutment screws. CONCLUSION: In this study, only a few of the prosthetic screws showed unacceptable loosening after 1 year of function. The clinical relevance of the observed high occurrence of loose abutment screws could be questioned, as all fixed prostheses were initially recorded as stable.

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PubMedDate not supplied

Early experience of implant-supported prostheses in patients with neurologic disabilities.

PURPOSE: The purpose of this prospective study was to provide a preliminary report of implant treatment in patients with neurologic disabilities. MATERIALS AND METHODS: Patients had been referred to the National Orofacial Resource Centre with different disabilities, specifically neurologic disorders causing various orofacial dysfunction problems, and were suitable for prosthodontic treatment with implants. Patients were treated with single implant-supported crowns, fixed partial dentures, or complete implant-supported dentures. Implants used were threaded titanium cylinders placed under general or local anesthesia. All surgical complications in the healing period or at second-stage surgery were noted, as were all prosthodontic complications. RESULTS: Fourteen patients were treated with 35 implants. Three implants were lost before or at second-stage surgery, and two implants were lost after loading. These complications were observed in two patients. Implant failures and other complications were observed in two patients in the mandible because of dehiscence of the mucoperiosteal flap and infection. Some patients had developed finger or oral habits, such as excessive tongue movements, that were probably responsible for these complications. One of the patients with Down syndrome possibly had reduced resistance to infections. No major complications were observed for the other 12 patients treated. CONCLUSION: Strict adherence to a surgical protocol is needed for the management of patients with neurologic disabilities. It is important to inform the patient's caregiver about maintenance of good oral hygiene and the increased risk of complications caused by finger or oral habits.

Adult↗