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Biomedical subjects

E Eerikäinen

Publications and source records attributed to E Eerikäinen.

7 recordsLinked to original sources
PubMed1987

Forces required by complete dentures for penetrating food in simulated function.

Forces required by complete dentures for penetrating some commonly used food items were measured experimentally. These forces were compared with the maximal bite forces of twenty-seven complete denture wearers. Food items that required the greatest forces in direct closure were rye bread (167 N), raw carrot (118 N), boiled meat (80 N), and raw cabbage (74 N). Raw carrot and raw cabbage required the greatest force in straight incision (39 N and 33 N, respectively). Simulated laterotrusion aided most in the penetration of rye bread and boiled meat. The penetration forces in simulated conditions were high compared with the maximal bite forces of the complete denture wearers.

Adult↗
PubMed1986

Inaccuracies and defects in frameworks for removable partial dentures.

We studied the accuracy of 167 removable partial denture frameworks made in five commercial dental laboratories according to detailed instructions given by dental students, under the supervision of experienced teachers. Fewer than one half of the frameworks proved to be perfect. Some of the faults were accepted in the clinic, but 42% had to be corrected: 26% in the clinic, and 16% in the laboratory. Laboratory problems could be blamed for two-thirds of the faults, and one-third seemed to be attributable to the clinic. The advantages of, for example, new impression materials seemed to disappear under other factors.

Denture Design↗
PubMed1981

Prosthetic treatment of dentinogenesis imperfecta. A case report.

Prosthetic reconstruction was made on dentition affected by dentinogenesis imperfecta. The bite was first raised with fixed bite plates, and then with temporary acrylic bridges; finally full gold and veneer crowns were made in the posterior teeth. The crowns were retained on the severely attrited teeth with self-threading parapulpal screws (TMS, Whaledent International, New York, U.S.A.) and amalgam and composite resin (Consise, 3M Company, St Paul, U.S.A.) posts. The teeth seem to have enough strength to withstand the occlusal forces, and the dentine appears hard enough to retain parapulpal screws. The prosthetic construction is still functioning well today, 5 years after starting treatment.

Acrylic Resins↗
PubMed1977

Enamel bonding plastic materials in modifying the form of abutment teeth for the better functioning of partial prostheses.

The potential uses of enamel bonding sealants and composite filling materials in increasing the retentive form of abutment teeth and covering the preparations for the occlusal supports of partial prostheses were studied in laboratory conditions. The materials tested were Nuva and Concise sealants and composite resins. Extracted permanent human molars, premolars and canines were inserted into acrylic blocks, two teeth in each block. An unretentive clasp framework was made on every test block. A retention prominence was built up separately of sealants and of composite materials occlusally to the tip of each clasp arm. The bond strength and wear resistance of the materials was tested in a device designed for this study. The bond of the prominences was very good, only two out of 114 prominences loosened. The retention gained with prominences was, on average, 18 N measured by the force needed for removal. The decrease in the total retention of the four clasp arms was measured by the force needed to remove the clasp framework. The total retention of the prominences made of Nuva and Concise sealants after 5000 removals was 53 and 50% of the original, when long, flexible clasp arms were used. The corresponding figures for composite resins were 56 and 59%. Short rigid clasp arms caused a distinctly faster abrasion. The prominences made of sealants, in particular, were abraded rapidly, one-fifth of retention being left after 3000 removals.

Composite Resins↗