Biomedical subjects

Rutger Persson

Publications and source records attributed to Rutger Persson.

5 recordsLinked to original sources

PubMed2005

Technical and biological complications/failures with single crowns and fixed partial dentures on implants: a 10-year prospective cohort study.

OBJECTIVES: To assess prospectively over 10 years the incidences of technical and/or biological complications and failures occurring in a cohort of consecutive partially edentulous patients with fixed reconstructions on implants of the ITI Dental Implant System. METHODS: Eighty-nine patients were available, 34 (38.2%) were male, 55 (61.8%) were female. At the 10-year examination (range 8-12 years), they were 58.9 years old (range 28-88 years). RESULTS: Single crowns (SC): 48 patients had been restored with 69 SC on 69 implants. Five of the implants with the crowns were lost because of biological failures. Two crowns (2.9%) were remade because of technical failures. Total failure amounted to seven (10%). Implant borne fixed partial dentures (I-I FPD): In 29 patients who had been restored with 33 implant borne suprastructures, the total number of failed I-I FPD was 2 (6.1%). Tooth-implant borne fixed partial dentures (I-T FPD): In 21 patients, 22 mixed tooth-implant borne reconstructions were constructed. The number of failed FPD reached 7 (31.8%). Statistically significantly fewer biological failures occurred with I-I FPD compared with the I-T FPDs (ANOVA, Bonferroni, P=0.022). The I-T FPDs experienced statistically significantly more frequent technical failures compared with the other two groups of suprastructures (P=0.003, 0.031). Consequences of complications: The occurrence of loss of retention as a complication increased the odds ratio (OR) to 17.6 (P<0.001) to end up in a technical failure. Similarly, the event of a porcelain fracture increased the OR for the suprastructure to be a failure at 10 years to 11.0 (P< or =0.004). Treatment of periimplantitis increased the OR to 5.44 (P< or =0.011) to result in a biological failure compared with implants in which this type of treatment was not applied. CONCLUSION: The three groups of suprastructures demonstrated marked differences in their patterns of failures and complications. Complications increased the risk for failure. Support by CRF, University of Berne, Switzerland.

Adult↗

PubMed2002

Maintenance of periodontal attachment levels in prosthetically treated patients with gingivitis or moderate chronic periodontitis 5-17 years post therapy.

OBJECTIVES: The present retrospective analysis was performed to evaluate the long-term results of initial periodontal and fixed prosthodontic treatment in patients with gingivitis or moderate chronic periodontitis during post-therapeutic irregular maintenance of 5-17 years. MATERIAL AND METHODS: Thirty-four patients participated in the study. Baseline data were taken from the patients' records when the periodontal and the prosthetic treatment was finished. A follow-up examination was performed in conjunction with the radiographic examination including assessment of plaque, bleeding on probing, probing pocket depth, recession and probing attachment loss. Information regarding the oral hygiene habits of the subjects as well as the amount of dental and initial therapy received between the observation time was obtained from the patients' records. RESULTS: The results from the clinical trial revealed that during the mean examination period of 11 years only 31 teeth were lost. The remaining restored and non-restored teeth did not show any significant differences in attachment loss (from 2.9 mm to 3.0 mm) in spite of a higher plaque value at the follow-up examination (from 42% to 48%). The BoP remained stable in the same time period and scored 31% to 28%. CONCLUSIONS: The periodontal attachment levels were maintained during a prolonged period despite irregular maintenance care. This indicates that in a population of obviously decreased susceptibility to chronic periodontitis, it is possible that fixed reconstructions will not - even under suboptimal supportive care - jeopardize the periodontal status.

Adolescent↗

PubMed2002

4.1 Web-based interactive learning programmes.

In the future, the training of competent dentists will need to take advantage of up-to-date digital technologies and learning practices. In order to accomplish this, the following goals should be considered: i) the design of 'customizable' web-based curriculum matrices that accommodate the training philosophies and resources of individual dental schools; ii) the development of digital instructional modules that can be incorporated or downloaded into specific parts of a curriculum; iii) the establishment of an e-consortium, which provides peer view and guidance in the design of teaching modules, and which is responsible for the storage, maintenance, and distribution of teaching modules within the consortium; iv) the development of central human and physical resources at each dental school to enable the seamless delivery of instructional modules in a variety of learning environments; and v) the assessment and provision of ICT training to students and faculty with respect to the use of computers and related digital technologies and educational software programmes. These goals should lead to the creation of a 'virtual dental school'. Within this project summative and formative evaluations should be performed during both the production and development of teaching material (e-learning material) and the learning process. During the learning process the following aspects should be measured and evaluated: i) students' behaviour; and ii) effectiveness, retention and the transfer of e-learned material into the clinical situation. To obtain evidence of the efficacy of e-learning material a certain amount of research has to be done in the near future. It is suggested that all parameters currently known have to be implemented during the development of a learning programme. Previous workers have evaluated the following elements with e-learning: i) planning, ii) programming and technical development, iii) learning behaviours, iv) learning outcomes of both the programme and the student, v) the acquisition of knowledge, skills and attitude and vi) the transfer of e-learned skills into clinical situations.

Competency-Based Education↗

PubMed2002

Are cardiac transplant patients more likely to have periodontitis? A case record study.

In several large epidemiological studies chronic periodontitis has been implicated as an additional risk factor, independent of other risk factors, for the development of ischaemic heart disease. The underlying mechanism is thought to be a localised infection giving rise to an inflammatory host response, and some experimental data agree with this hypothesis. Recently, however, some studies have questioned the post dated relationship between the two diseases. The current case-record study was undertaken to evaluate the prevalence of chronic periodontitis and the severity of such periodontal disease in a heart transplant population, assuming the latter represented a relatively severely compromised cardiovascular patient population. The study demonstrated that 76% of the patients had various degrees of periodontal disease prior to undergoing a heart transplant. Thus, it is possible that a relationship between cardiovascular disease and periodontal disease exists, but further, large intervention studies will be needed to confirm such a conclusion.

Adolescent↗

PubMedDate not supplied

Caregiving and gingival symptom reports: psychophysiologic mediators.

OBJECTIVE: We first assessed the association of caregiving with gingival symptom reports. We then assessed whether the observed relationship was mediated by psychophysiologic host factors. METHODS: Caregivers of spouses with Alzheimer's disease (n = 123) were compared with demographically similar noncaregiver spouses (n = 117). RESULTS: The percentage of caregivers (17%) who reported gingival symptoms was twice that of noncaregivers (8.5%) (p < .05), despite the fact that caregivers and noncaregivers did not differ in oral health care. The relationship between caregiving and gingival symptom reports was mediated by psychophysiologic variables. Caregivers were higher on hassles (p < .05), depressed mood (p < .05), and metabolic risk (insulin, glucose, obesity; p < .05) than were noncaregivers. Greater gingival symptom reports were also associated with greater hassles (p < .01), depressed mood (p < .001), and metabolic risk (p < .001). Measures of subcutaneous fat, inflammation, and frank diabetes were related to gingival symptom reports but not to caregiver status. CONCLUSIONS: A higher percentage of caregivers reported gingival symptoms than noncaregivers. These results have implications for research on aging, psychophysiology, and chronic stress.

Aged↗