Biomedical subjects

L A Marks

Publications and source records attributed to L A Marks.

21 records · Page 2Linked to original sources

PubMedDate not supplied

Conservative interproximal box-only polyacid modified composite restorations in primary molars, twelve-month clinical results.

The treatment of proximal caries has changed during the last decade. The present study evaluates a recently developed material, applied in box-only preparations in primary molars. At the twelve-month evaluation of this clinical study, it became obvious that Dyract can be an alternative for Tytin in the primary dentition, though there is some change in color of the Dyract material. In time, the marginal adaptation of Dyract seems to improve. The preparation time for both materials is comparable. The total treatment time of box-only Dyract restorations (including an occlusal sealant), however, is longer compared to conventional class II Tytin restorations. Although in both groups radiolucencies were found at the baseline radiograph evaluation, no sign was found of secondary caries. One recurrent caries lesion was found adjacent to a Dyract restoration. It should be emphasized that one-year data do not indicate the longterm success of restorations.

Child↗

PubMedDate not supplied

Ketac Molar Versus Dyract Class II restorations in primary molars: twelve month clinical results.

The aim of the present clinical study was an in vivo evaluation of an improved conventional glass ionomer cement Ketac Molar (ESPE), compared to a polyacid modified composite resin, Dyract (Dentsply/De Trey), used in primary molars. Fifty-three Ketac Molar and fifty-two Dyract restorations were placed in box-only preparations in primary molars. The application time for the chemically cured Ketac Molar, was longer compared to the light-cured Dyract. In comparing the materials, no differences were found, comparing both materials regarding secondary caries, marginal adaptation, wear and fracture toughness. One case of recurrent caries adjacent to a Ketac Molar restoration and two cases in the Dyract group were reported. Two Ketac Molar restorations and one Dyract showed bulk fracture at the time of evaluation. At the twelve-month evaluation, no difference between the investigated materials was registered, which indicates that Ketac Molar can be used as a proximal restoration in the primary dentition. It should be emphasized, however, that one-year data should not be extrapolated to indicate the long-term success of restorations.

Analysis of Variance↗

PubMedDate not supplied

Medical technology transfer: the inventor's perspective.

Technology transfer can be a difficult and frustrating experience for an inventor, one with a questionable outcome despite tremendous effort. A university-based inventor may find that there is a "technology transfer office" at his or her institution, but that it is poorly equipped to patent and license inventions. In such a case, the inventor may have to play a particularly active role in the patenting process and, especially, the marketing process. Furthermore, university-based inventors may find themselves caught up in issues of academic freedom and potential conflicts of interests. There are often no role models for entrepreneurial activity at a university, and as a result many inventors have had to leave their university positions to pursue financial gain from their inventions. When licensing inventions to companies, the "NIH syndrome" can be extremely frustrating. It is often difficult for the inventor to communicate his or her certain knowledge that the invention solves a specific problem perfectly. Also, an inventor may find that even if a company is interested and wishes to license the invention it may ultimately have little or no competence in the subject area and, as a result, the invention never finds its way to commercial production. Nonetheless, the rewards can be well worth the effort. If a successful license is reached and the device goes into production, there may be substantial personal financial reward for the inventor. If the university's patent policy is enlightened, a portion of the royalty income may support ongoing and future activities in the inventor's research laboratory.(ABSTRACT TRUNCATED AT 250 WORDS)

Medical Laboratory Science↗