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Biomedical subjects

M Heners

Publications and source records attributed to M Heners.

At least 19 recordsLinked to original sources
PubMed1996

Implant-supported single-tooth replacements: risk of implant and prosthesis failure.

Data from 236 patient cases of implant-supported single-tooth replacements in the maxillary anterior region were sequentially recorded and documented. The time in situ ranged from a minimum of five to a maximum of 19 years. Twenty-two implants failed during the observation period. The causes of such failure were peri-implantitis, implant fracture, and trauma. The probability of success according to the Kaplan-Meier method decreased to 0.89 over a period of 10 years. The failure rate for implants replacing lateral incisors was lower than that for implants replacing central incisors. Seventy-six cases were clinically documented for 10 years or more. In 15 cases, replacement of the prosthetic superstructure was necessary during the 10-year period. The course of therapy and clinical follow-up care is described by a multi-state distribution.

Adolescent↗
PubMed1991

[Considerations in weighing dental intervention].

The dental operation as an intervention in the physical and psychical integrity of human beings is controlled by three main regulators: the concurrence of dental treatment with scientific knowledge, its accordance with the law to secure dental treatment and its supervision by law. The significance of these three regulators for the weigheability of dental operations is described and analyzed.

Dental Care↗
PubMed1991

[The significance of generally accepted rules and their criteria in the discussion on the quality of dental treatment].

The significance of generally accepted rules and their criteria in the discussion on the quality of dental treatment is pointed out. The fact that dental treatment is based not only on empirical but to a great extent also on hypothetically established rules emphasizes the importance of epidemiologic clinical research. Dental treatment cannot be considered purely under the aspects of mechanics. The consideration of dental activities by mechanical and technical parameters alone is not permissible, because this approach disregards the non-mechanical nature of dental interventions.

Dental Care↗
PubMed1991

[Long-term success of various implant types--a study over 15 years].

This study reports the clinical success rates of 6 different implant types inserted with defined clinical indications. The criterium used was implant loss. The survival periods of a total of 1723 implants were statistically evaluated according to Kaplan and Meier's method in relation to the type of implant used and the indication chosen.

Dental Implants↗
PubMed1990

[Occlusal margin quality of Cerec-inlays several months after insertion].

The quality of the occlusal margins of 58 computer-machined ceramic inlays (Cerec) was examined by SEM. The adhesion of the luting composite to enamel and to the inlay appeared more of less stable. However, the wear of the composites was substantial and more pronounced in Brilliant and in Microfill pontic C than it was in Heliomolar.

Adult↗
PubMed1990

[Prognosis of abutment teeth in severely reduced residual dentitions].

The survival rate of 2094 abutment teeth in 671 removable partial denture cases was analysed. Within an interval of 2-7 years 150 abutments were lost. The survival-rate of abutments in severely reduced dentitions differs significantly from that in dentitions with more than 3 teeth. Regarding the framework design there was no significant difference in the survival-rate of abutment teeth for removable partial dentures supported by more than 3 teeth.

Dental Abutments↗
PubMed1989

[Prognosis of periodontally reduced abutment teeth under removable dentures].

The extraction rate was studied in a group of 151 patients treated for periodontal and prosthodontic reasons. 29 of 588 abutments had to be extracted due to periodontal problems within a period of 6 years after prosthodontic treatment. The initial findings of the extracted teeth are correlated with the initial findings of all abutments. It can be shown that periodontally reduced teeth involve a higher risk of extraction; nevertheless, in the majority of the cases, they could be successfully used as abutments.

Dental Abutments↗
PubMed1980

[Electronic analysis of the limits of mandibular movement].

In this investigation, the speed and acceleration of the movement limit of the mandible were registered electronically for the first time. Beginning with the registration of the path alteration via the time, the first and second differential quotient was formed using a special electronic experimental apparatus; this quotient was then represented as a curve. The experimental apparatus facilitates a deeper understanding of microscopic alterations in the movement of the mandible.

Acceleration↗