摘要:

The microflora associated with osseointegrated implants used as abutments for overdentures was investigated in 18 edentulous patients, 2 years after implantation. 52.8% of the organisms cultured were facultatively anaerobic cocci and 17.4% were facultatively anaerobic rods, while Gram‐negative anaerobic rods accounted for only 7.3%.Fusobacteriumsp. andBacteroides intermediuswere both found in 8.8% of the samples.B. gingivalisand spirochetes were not found. Repeated microbiological and clinical data were collected in 9 patients during the 3rd, 4th and 5th year after implantation. No significant time trends were noted. Separate samples taken within the same patient from different sites were similar. Therefore, bacteriological independence of sites could not be assumed for the conditions investigate

ISSN:0905-7161    

DOI:10.1034/j.1600-0501.1990.010101.x

出版商:Munksgaard International Publishers    

年代:1990

数据来源: WILEY

摘要:

The subgingival plaque around both teeth and implants was analysed by means of differential phase‐contrast microscopy. It was noted that, in comparison to natural teeth, the subgingival samples from implants were more frequently too small to provide adequate bacterial counts. In 24 partially edentulous patients (with implants and teeth in the same jaw), no significant differences in the distribution of bacterial morphotypes could be found between implants and natural teeth. The %s of coccoid cells, motile rods, spirochetes and other bacteria were 65.8, 2.3, 2.1, and 29.8 for implants and 55.6, 4.9, 3.6, and 34.9 for teeth, respectively. However, when the plaque composition on the implants of fully edentulous patients was compared with those of teeth or implants of partially edentulous patients (with teeth and implants in the same and/or opposite jaw), significant differences appeared. In fully edentulous patients, more coccoid cells (71.3%) and significant fewer motile rods (0.4%) and spirochetes (0.0) were found around the implants. The results suggest that teeth may serve as a reservoir for the bacterial colonisation of titanium implants in the same mout

ISSN:0905-7161    

DOI:10.1034/j.1600-0501.1990.010102.x

出版商:Munksgaard International Publishers    

年代:1990

数据来源: WILEY

摘要:

9 single crystal sapphire dental implants were installed bilaterally into pre‐extracted areas in the lower jaw of two beagle dogs and histologically analysed after 180 days insitu. 8 implants were stable and radiographs disclosed complete bone healing. Light‐, scanning‐ and transmission electron microscopy demonstrated that the stable implants were surrounded by a mineralizing bone boundary and a mutosa nearly free from inflammatory cell infiltrations. The 9th implant was mobile and surrounded by a non‐mineralized connective tissue capsule containing bundles of collagen. The ultrastructure of the mucosa surrounding the implants closely resembled the mucosa surrounding the tooth. Histometric analysis of the alveolar bone surrounding the stable implants revealed that the value of the bone contact surface ranged from 37.1%% to 86.9% (mean value 61.8%) at the light microscopi

ISSN:0905-7161    

DOI:10.1034/j.1600-0501.1990.010103.x

出版商:Munksgaard International Publishers    

年代:1990

数据来源: WILEY

摘要:

The purpose of this study was to present the surgical procedures and the clinical results of guided tissue regeneration (GTR) treatment aimed at regenerating local jaw bone in situations where the anatomy of the ridge did not allow the placement of dental implants. 12 patients were selected for ridge enlargement or bony defect regeneration. A combined split‐ and full‐thickness flap was raised in areas designated for subsequent implant placement. Following perforation of the cortical bone to create a bleeding bone surface, a PTFE membrane was adjusted to the surgical site in such a way that a secluded space was created between the membrane and the subjacent bone surface in order to increase the width of the ridge or to regenerate bony defects present. Complete tension‐free closure of the soft tissue flap was emphasized. Following a healing period of 6 to 10 months, reopening procedures were performed and the gain of bone dimension was assessed. In 9 patients with 12 potential implant sites, a sufficient bone volume was obtained to allow subsequent implant placement. The gain of new bone formation varied between 1.5 and 5.5 mm. In 3 patients, acute infections developed which necessitated early removal of the membranes and no bone regeneration could be achieved. The results of the study indicate that the biological principle of GTR is highly predictable for ridge enlargement or defect regeneration under the prerequisite of a complication‐free

ISSN:0905-7161    

DOI:10.1034/j.1600-0501.1990.010104.x

出版商:Munksgaard International Publishers    

年代:1990

数据来源: WILEY

摘要:

It has been postulated that the wound healing in a closed submerged location is one of the prerequisites for osseointegration of dental implants. The purpose of the present study was to evaluate the tissue integration of intentionally non‐submerged titanium implants inserted by a one‐stage surgical procedure. 100 ITI implants were consecutively placed in 70 partially edentulous patients. After a healing period free of masticatory loading for at least 3 months, the implants were examined. The clinical status showed for all implants neither detectable mobility nor signs of a peri‐implant infection. Therefore, prosthetic abutments were inserted, and the patients were restored with fixed partial dentures. All patients were regularly recalled at 3‐month intervals, and no patient dropped out of the study. Thus, all 100 implants were re‐evaluated 12 months following implantation. Plaque‐ and sulcus bleeding indices, probing depth, clinical attachment level, width of keratinized mucosa, and periotest scores were assessed. In addition, standardized radiographs were analyzed for the presence of peri‐implant radiolucencies and for the location of alveolar bone levels around the implants. Based on predefined criteria, the implants were classified as successful or failing. 98 implants were considered successful, and 1 implant failing. The remaining implant exhibited a peri‐implant infection requiring local and systemic antimicrobial treatment. The results of this short‐term study indicate that intentionally non‐submerged ITI implants yield a high predictability for successful

ISSN:0905-7161    

DOI:10.1034/j.1600-0501.1990.010105.x

出版商:Munksgaard International Publishers    

年代:1990

数据来源: WILEY

摘要:

Fixed reconstructions on implant abutments may be a welcome modality in the treatmcnt of partially edentulous patients following the principle of a prophylactically oriented comprehensive care. The option to create artificial tissue integrated abutments widens the range of indications for fixed reconstructions. Risky long‐span bridges as well as the preparation of intact teeth for bridge abutments may frequently be avoided. Never should the contours of the prosthesis interfere with the patient's performance of optimal plaque control. Furthermore, supportive periodontal therapy with regular maintenance visits may be provided to optimize a long‐term prognosis of the dention as well as the tissue‐integrated artificial abut

ISSN:0905-7161    

DOI:10.1034/j.1600-0501.1990.010106.x

出版商:Munksgaard International Publishers    

年代:1990

数据来源: WILEY