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Biomedical subjects

E Mericske

Publications and source records attributed to E Mericske.

8 recordsLinked to original sources
PubMed2001

Clinical evaluation and prosthetic complications of single tooth replacements by non-submerged implants.

The aim of the present study was to evaluate single tooth replacements by non-submerged implants. In the time period from 1990 to 1998, 72 patients were consecutively admitted for treatment with a total of 109 solid screw ITI-implants supporting single crowns. All crowns were ceramic to metal fused with a ceramic occlusal surface and mounted to the octa-abutment. The mean observation time was 4.3 years, ranging from >1 to 9 years. The implants were monitored regularly by periimplant parameters. Periapical radiographs using the parallel technique were taken after the healing period and in 1999 for comparative measurements. No implant was lost during the healing phase, while 3 failures occurred after a loaded period of 2.5 and >5 years, respectively. The 5-year cumulative survival rate was 99.1%. In the course of the study, only 2 implants exhibited marginal inflammation that required treatment. The radiographically measured distance (DIB) from the implant shoulder to the first implant-bone contact was significantly increased in 1999 and different between the two readings. However, this difference in DIB was not significant between implants with a short (1 year) and long (>5 years) observation period. It was concluded that changes in the crestal bone level occur mostly in the first postsurgical year. Prosthetic complications were rare, mostly encountered in the first year after loading and often limited to re-tightening of the occlusal screw.

Adult↗
PubMed1995

Periotest measurements and osseointegration of mandibular ITI implants supporting overdentures. A one-year longitudinal study.

The Periotest values of mandibular implants, registered before and after loading by overdentures, were compared. Thirty edentulous patients with 60 Bonefit ITI implants were selected with an average age of 69 years. The Periotest values were measured 1) after a healing period of 3 months and 2) after the overdentures had been worn for a period of 12 months. Periodontal parameters were recorded at both examinations. Furthermore, 17 biopsies of mandibular bone taken from the implant sites during implant surgery were analyzed to assess the bone density. The histomorphometric evaluation was done using a point count method. At the end of the healing period, all registered Periotest values were negative, ranging from -1 to -8 with an average of 4.08. One year later, all measurements showed negative values again, ranging from -2 to -8 with an average of 4.97. The difference was statistically significant. Seventeen biopsies of mandibular bone were evaluated to determine the density. The range of bone density was from 22.4% and 90.9%. There was no correlation found between bone density and Periotest values. However, a significant correlation could be observed between mandibular atrophy and bone density.

Aged↗
PubMed1989

[The elderly patient in private practice].

The aim of this study was to get an overview on therapeutic measures and recall compliance of elderly patients treated in a private dental office. Data regarding the dental treatment und prosthodontic rehabilitation were collected from a total of 429 patients who were 65 years old and older (average: 75.8 years). 94 patients (23%) were edentulous and had dentures in both jaws, whereas 335 patients still had remaining teeth in one or both jaws. Only 8 patients had a full complement of teeth. 239 patients (55%) had complete oral rehabilitation. Few fixed partial prostheses and mainly removable partial und complete dentures were inserted. 190 patients did not get new reconstructions, because 1) they did not need it, or 2) they did not want it. In some cases, existing prostheses could be adapted or repaired. Almost all patients with remaining teeth were in need of periodontal treatment. 54% of them underwent periodontal therapy. Maintenance care was supported by regular recall. 65% of the patients appeared regularly according to their individual interval. A strong correlation could be established between regular recalls, the extent of rehabilitation and the number of remaining teeth.

Aged↗
PubMedDate not supplied

Effectiveness of maxillary overdentures supported by implants: maintenance and prosthetic complications.

PURPOSE: The aim of this study was to evaluate the prosthetic complications with implant-supported overdentures in the maxilla. MATERIALS AND METHODS: Forty-one patients (mean age 61 years) were consecutively admitted for treatment from 1991 to 1998. A total of 173 ITI implants were placed. Four to six implants either connected with a bar (34 overdentures) or with single anchors (seven overdentures) supported the denture, and only a few parties had fewer than four implants. The overdentures had a horseshoe design and were reinforced by a cast-metal framework. The mean observation time was 3.2 years. Oral hygiene and periimplant parameters were regularly assessed, and records were kept of prosthetic maintenance service. All prosthetic complications encountered were classified related to (1) implant components and anchorage devices, (2) mechanical and structural failures of dentures, or (3) denture-related adjustments. RESULTS: Three implants did not osseointegrate, and five implants were lost after loading. Thus, the overall survival rate of the implants was 95.5%. Altogether, 85 prosthetic complications were encountered. The most frequent finding was retightening of the bar screw and adjustments of the bar retainers. Repair of dentures was not frequent and was mostly related to broken teeth. No fracture of dentures was observed. Renewal of dentures occurred twice, once after loss of all implants in one patient. Thirty-nine overdentures had been continuously worn; thus, the overall denture stability was 95%. Mucosal irritation and need for occlusal adjustment were the most frequent findings in the first year. Over time, a decrease of complications was observed. CONCLUSION: Planned maxillary overdentures supported by implants are a successful treatment modality on a short-term basis.

Acrylic Resins↗
PubMedDate not supplied

Occlusal force and oral tactile sensibility measured in partially edentulous patients with ITI implants.

Maximal occlusal force and oral tactile sensibility were recorded in (1) a group of partially edentulous patients restored with ITI implants supporting fixed prostheses or single crowns and (2) a control group consisting of fully dentate subjects with healthy natural teeth. Maximal occlusal force was measured with a miniature force transducer placed between antagonistic implant/tooth pairs in the test group and antagonistic teeth in the control group. The detection threshold of minimal pressure (ie, passive tactile sensibility) was recorded with dynamometers, and minimal perceived thickness (active tactile sensibility) was assessed using steel foils with a thickness from 100 to 10 microns. Highest maximal occlusal force was measured in fully dentate subjects on second premolars (average 450 N). A significant reduction on the first premolars (300 N) was observed. With fixed prostheses supported by implants, the average value of maximal occlusal force was distinctly lower, about 200 N for first premolars and for molars, and 300 N for second molars. The maximum force was again found on second premolars. The detection threshold of minimal pressure was significantly higher on implants than on natural teeth. The average number of wrong assessments when testing steel foils was 3.2 for antagonistic implant/tooth pairs and 2.6 for natural teeth. The comparison of test sides (with implants) and control sides (without implants) in patients of the test group did not reveal significant differences of measurements. It seems that patterns of oral function depend primarily on the state of dentition, type of prosthodontic restorations, and on psychological aspects, and secondarily on the presence of implants.

Adult↗