An audit of implant practice websites: content and regulatory compliance.

AIMS AND OBJECTIVES: To audit the content of dental practice websites offering dental implant services against a framework based on the GDC 2012 Guidelines for Ethical Advertising and other relevant advertising standards. METHODS: An audit framework was constructed and applied to the top fifty websites resulting from a Google UK search using the search term 'dental implant specialist'. RESULTS: Compliance with many elements of the GDC Guidance remains poor. Sixty-eight percent of websites claimed that the practitioner providing the service was a GDC registered specialist, though examples were found where this claim was unfounded. Fourteen percent of practice websites claimed that the service was being carried out by an 'implant specialist' and 16% claimed the practitioner was an 'implantologist'; the majority of sites using these terms (10%) involved practitioners that had no specialist status. The display of potentially misleading memberships and fellowships of a range of dental associations, academies, societies and foundations remains common (52%), as does the adoption of the title 'Dr' (60%). CONCLUSION: Comparison with earlier studies indicates that compliance with recent GDC standards is generally improving, though whether the pace of improvement is seen as acceptable or not is something that policymakers and regulatory authorities may need to consider further.

Stability of alginate-immobilized algal cells.

Investigations were carried out using immobilized Chlorella cells to determine the diameter, compressibility, tolerance to phosphate chelation, and ability to retain algal cells during incubation of various alginate beads. These physical bead characteristics were found to be affected by a variety of interactive factors, including multivalent cation type (hardening agent) and cell, cation, and alginate concentration, the latter exhibiting a predominant influence. The susceptibility of alginate beads to phosphate chelation was found to involve a complex interaction of cation type, concentration, and pH of phosphate solution. A scale of response ranging from gel swelling to gel shrinking was observed for a range of conditions. However, stable calcium alginate beads were maintained in incubation media with a pH of 5.5 and a phosphate concentration of 5 microM. A preliminary investigation into cell leakage from the beads illustrated the importance of maintaining a stable gel structure and limiting cell growth to reduce leakage.

Monaural and binaural speech perception in reverberation for listeners of various ages.

The Modified Rhyme Test (MRT) was processed through a room (volume 165 m3, reverberation time T = 0.4, 0.8, and 1.2 s). For both binaural and monaural earphone listening the tests were recorded with a manikin (Kemar) and equalization filters to compensate for the ear canal effect. Six groups of subjects, ten subjects each, had mean ages of 10, 27, 42, 54, 64 and 72 years and average hearing threshold levels. HTLs (for 0.5, 1, and 2 kHz) of 2.7, 5.6, 6.0, 10.9, 14.4, 17.5 dB, respectively. The individual scores for the MRT without reverberation were between 90% and 100% at 70 dB SPL. Children and the elderly required from 10 to 20 dB higher SPLs than young adults to obtain maximum scores. An analysis of variance showed that all the main effects: T, age, and monaural versus binaural listening were significant. The scores declined with T for all ages. The best scores were obtained by the young adults (27 year olds). The binaural scores were about 5% better than monaural scores. Factors contributing to the results and practical implications for amplification are discussed.