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T Tuominen

Publications and source records attributed to T Tuominen.

13 recordsLinked to original sources
PubMed2001

[Small changes in health differences in the Nordic countries during the 1980s and 1990s].

The study examined changes over time in health inequality in Denmark, Finland, Norway and Sweden. Data derive from comparable interview surveys carried out in 1986/87 and 1994/95. Limiting long-standing illness and perceived ill health were analysed regarding age, gender; educational attainment, and employment status. Age adjusted prevalence rates were calculated. Changes in differences in health were found in education and employment status groups. There was little or no change in the prevalence of ill health during the time period studied. Despite social and economic changes differences in health remained broadly stable in the examined countries.

Age Factors↗
PubMed2001

Bovine bone implant with bovine bone morphogenetic protein in healing a canine ulnar defect.

Xenograft is considered an alternative material for bone transplantation, but its bone healing capacity is inferior compared to that of autografts and allografts. Here, we tested whether bone morphogenetic protein (BMP) addition enhances the suitability of demineralized xenogeneic bovine bone for bone grafting in dogs, and whether xenogeneic bone is a suitable carrier material for BMPs. The capacity of demineralized bovine bone implants, with and without native partially purified bovine BMP, to heal a 2-cm ulnar defect was determined in six dogs over a follow-up time of 20 weeks. No instances of bone union were seen, but there was slightly more bone formation in the xenografts with BMP, though the difference was not statistically significant. The ulnas treated with an implant with BMP were also mechanically stronger, but the difference was not significant. Computed tomography scans showed no differences in the implant area in bone density, bone mineral content, or bone cross-sectional area. It is concluded that native, partially purified BMP does not sufficiently improve the suitability of bovine demineralized xenografts as a bone substitute material for dog. Demineralized xenogeneic bone does not seem to be a feasible carrier material for BMP.

Animals↗
PubMed2001

Composite implant composed of hydroxyapatite and bone morphogenetic protein in the healing of a canine ulnar defect.

BACKGROUND AND AIMS: Hydroxyapatite (HA) has been considered as a carrier material for bone morphogenetic proteins (BMP). The aim of this study was to evaluate the capacity of a composite implant of HA and native bovine BMP to heal a 2 cm segmental defect in the canine ulna. MATERIALS AND METHODS: A composite HA+BMP implant was compared with plain HA implants and cortical autografts. The fixation was accomplished with an intramedullary Kirschner wire. The bone union was evaluated by X-rays taken at operation and after 3, 6, 9, 12, 16, 25, 35 weeks and by histology and mechanical torsion tests. RESULTS: HA implants were not able to produce complete bone union even with BMP. There was some bridging between the implant and the bone in the defects treated with either plain HA or HA+BMP implant, the bridging being slightly more pronounced with HA+BMP. The autografts showed a significantly better capacity to heal the defect. The HA implant did not resorb markedly during the study. There was no significant difference in mechanical strength between the HA and HA+BMP groups. CONCLUSIONS: HA was not an adequate bone substitute material in this study model, and BMP was not able to enhance sufficiently the poor capacity of HA to heal canine ulnar defects.

Animals↗
PubMed2000

Native bovine bone morphogenetic protein improves the potential of biocoral to heal segmental canine ulnar defects.

We studied the effect of a composite implant consisting of coral and native bovine bone morphogenetic protein (BMP) on the healing of 2 cm segmental defects in the canine ulna. Plain coral and cortical autograft bone implants were used as controls. The fixation was temporary for 9 weeks with an intramedullary Kirschner wire (6 ulnas with a composite implant of coral and BMP, 6 with plain coral and 6 with an autograft) or a plate and screws (3 ulnas with a composite implant and 3 with plain coral). X-rays were taken at 3, 6, 9, 12, 16, 26 and 36 weeks, and mechanical torsion tests were performed at the end of the study. The score for bone formation and bone union evaluated from radiographs was significantly higher in the composite implant group than in the plain coral group at 16 weeks, but the score was even higher with autografts. BMP accelerated the resorption of the coral implant. The mechanical strength of the composite implants was higher than that of the bones with a plain coral implant (P < 0.05), while the mechanical strength of the coral implants, even with BMP, was significantly lower than the strength of autografts (P < 0.01). In conclusion, BMP enhanced the capacity of a coral implant to heal a segmental ulnar defect by increasing bone formation, but the effect of this combination was not as good as that of a cortico-cancellous autograft.

Animals↗
PubMed2000

Amalgam waste management. Issues & answers.

A review of U.S. dental amalgam waste management activities finds a wide variety of approaches, processes and results, within which the authors have observed an inconsistency of definitions, measurements, standards and even of clearly applied goals. As a result, outcomes have varied greatly from community to community. This manuscript attempts to deliver logical options, which might prevail even within an atmosphere of differing perspectives. The authors believe that successful outcomes are achievable within a collaborative environment of shared learning and cooperative planning. By example, the authors attempt to demonstrate how the joint acceptance of certain definitions and goals has served as a pathway to success in one community's dental waste management project. The goal of this paper is to share tools that may contain some measure of applicability to other similar collaborations.

Air Pollution↗
PubMed1996

Psychological responses to a marine disaster during a recoil phase: experiences from the Estonia shipwreck.

The sinking of the car ferry, Estonia, was one of the world's most devastating marine disasters that has ever occurred in peace time. Altogether 138 passengers and crew members were rescued, and 38 of them were taken to the Turku University Central Hospital in Finland. The present article describes the various psychological reactions among the survivors during the first three days of the recoil phase.

Adjustment Disorders↗
PubMed1995

[Emergency psychiatric treatment of survivors of the Estonia disaster].

The sinking of the car ferry, Estonia, was one of the world's most devastating marine disasters of all time. Mass casualty situations tend to give rise to more mental than physical injuries among the survivors. Psychiatric crisis intervention is in the process of becoming established as one arm in the management of disaster victims. In the article is described the emergency psychiatric care which University Hospital, Abo, was able to offer survivors of the Estonia catastrophe. On the basis of the experience gained, the authors suggest that emergency psychiatric plans should be drawn up at all larger hospitals, as there is no time for careful planning in the event of a major incident.

Crisis Intervention↗
PubMed1995

One dose cefuroxime prophylaxis in hip fracture surgery.

One 3 g intravenous dose of cefuroxime during the induction of anaesthesia was administered randomly in a series of 162 consecutive hip fractures. The overall infection rate was 8.0%, and 2.4% for deep infections. The number of infections was seven in the prophylaxis group and six in the control group. The percentage of deep infections was 3.9 and 1.4, correspondingly. Antibiotic prophylaxis given did not seem to have an effect on the infection rate.

Adult↗
PubMed1984

Renal biopsy in acute renal failure.

Renal biopsies were performed on 91 out of 99 patients with acute intrinsic renal failure. In all these 91 cases a clinical diagnosis was suggested by an experienced nephrologist unaware of the renal biopsy findings. Most diagnoses agreed with the histopathological findings, but there were important exceptions. On clinical grounds, acute tubulointerstitial renal disease was diagnosed correctly in 77% and acute glomerulonephritis in 56%. In 15% of the patients the clinical data did not permit any certain diagnostic suggestion. In about 20% the biopsy finding definitely influenced the choice of medical treatment. In those 15 patients who needed dialysis treatment, the biopsy findings helped in determining whether this need was temporary or permanent. Our results show that renal biopsy is valuable in settling the diagnosis, in determining the prognosis, and in planning the treatment of acute intrinsic renal failure.

Acute Kidney Injury↗
PubMed1977

Alternative model and approach for determining microbial heterotrophic activities in aquatic systems.

Increasing amounts of high-specific-activity tritiated organic compounds were added to samples of several natural waters such that in situ substrate concentrations might be approximated. The uptake responses by the native heterotrophic microflora suggested that (i) heterotrophic populations metabolize the added nutrients, but (ii) these responses are not necessarily a reflection of Michaelis-Menten enzyme kinetics. The uptake kinetics appeared to be due to dilution of the naturally occurring metabolite by added radioactive substrate and physiological responses of the microflora to organic enrichment.

Amino Acids↗
PubMed1976

Heterotrophic activities of bacterioneuston and bacterioplankton.

Numbers of viable bacteria as indicated by colony-forming units (CFU), microbial adenosine triphosphate levels, dissolved organic carbon (DOC), particulate organic carbon and nitrogen (POC and PON), glucose concentration, heterotrophic potential (Vmax), and in situ heterotrophic activity (Vn) of near-surface microlayer samples (70-80 mum depth), the neuston, and bulk column water samples (0.2-1.5 m depth), the plankton, of several natural waters were compared. DOC and glucose concentration values of near-surface and bulk water were similar, whereas POC and PON values of the near-surface were normally one order of magnitude greater than those of bulk water. Viable counts were generally greater in the neuston, but ATP levels were greater in the plankton. Comparative values of total heterotrophic potentials and heterotrophic activities fluctuated greatly. Heterotrophic potential per CFU of the neuston was 33% of that of the plankton; neuston heterotrophic activity per CFU was 10% of that of the plankton. These data suggest that neustonic heterotrophic bacteria are not as metabolically active as their planktonic counterparts and that they are under greater stress at the near-surface than in the column water.

Adenosine Triphosphate↗
PubMedDate not supplied

Amalgam waste management: issues and answers.

In reviewing U.S. dental amalgam waste management activities, one finds a wide variety of approaches, processes, and results, within which the authors have observed an inconsistency of definitions, measurements, standards, and even of clearly applied goals. As a result, outcomes have varied greatly from community to community. This manuscript attempts to deliver logical options which might prevail even within an atmosphere of differing perspectives. The authors share the belief that successful outcomes are achievable within a collaborative environment of shared learning and cooperative planning. By example, the authors attempt to demonstrate how the joint acceptance of certain definitions and goals has served as a pathway to success in one community's dental waste management project. The goal of this paper is to share tools that may contain some measure of applicability to other similar collaborations.

Conservation of Natural Resources↗