If they didn't listen to Einstein or Bohr,they are not going to listen to you

In the 12 years which have elapsed since the United Nations declared 1981 to be the Year of the Disabled, the number of amputees world‐wide has risen alarmingly, continuing the pattern of the past 40 years, which have seen innumerable conflicts, large and small, with ever‐increasing and indiscriminate use of ‘improved’ antipersonnel mines which have been sown in enormous numbers in rural areas. Even after fighting has ceased — as in Vietnam, which currently has some 200,000 amputees — fresh injuries are caused daily, often to children, by the long‐delayed detonation of these weapons.

Much of the research and development in prosthetics since World War II has concentrated on producing artificial limbs suitable for an affluent and industrialized society. These, being made from the most modern materials and incorporating the latest technology, are of necessity expensive even for affluent Americans or Europeans and quite out of reach for the 80 per cent of the world's amputees who live in the developing world and for the vast majority of whom these splendid prostheses may be entirely inappropriate. This article describes a foot and leg specifically designed to fit in with the customs and practices of just such people.     

The retention of vented-cast dental posts

Post retention has been shown to vary with post diameter, larger diameters are more retentive than smaller diameters. Additionally, the retention of posts with integral cement-release channels of previously proven effectiveness has been shown to be statistically very significantly greater than posts of equal diameter with smooth surfaces.     

Silicone-induced foreign-body reaction after temporomandibular joint arthroplasty. Case report

Dacron-reinforced Silastic sheets were removed from two patients who had previously undergone surgery for internal derangements of the temporomandibular joint. Excised tissue from around the joints was submitted for histological analysis, revealing a diagnosis of detritus synovitis. The significance of these findings with respect to the insertion of foreign material into the jaw joint is discussed in the light of recent research.     

Fibrous dysplasia of the jaw bone: A review of 15 new cases and two cases of recurrence in Jamaica together with a case report

The authors reviewed 15 new cases of fibrous dysplasia of the jaw bone and two cases of recurrence seen in Jamaica between 1980 and 1995. Only cases which had a histological confirmation of fibrous dysplasia were included. The clinical behaviour and radiological findings of these cases were studied from the case files, either at the Cornwall Regional Hospital or the Kingston Public Hospital in Jamaica.     

A clinical investigation of the efficacy of low level laser therapy in reducing orthodontic postadjustment pain

Low level laser therapy (LLLT) has been shown to produce analgesic effects in many clinical applications. The aim of this clinical study was to test the efficacy of LLLT in controlling orthodontic postadjustment pain. Thirty-nine volunteers were selected for this study that used a double-blind design with placebo control. Elastomeric separators were placed at the proximal contacts of one premolar in each quadrant of the dentition to induce orthodontic pain. The tip of a 30 mW gallium-arsenide-aluminium (830 nm) diode laser probe was then placed at the buccal gingiva and directed at the middle third of the root. Three different treatment durations of 15, 30, and 60 seconds and one placebo treatment of 30 seconds were tested within each subject. The study was conducted over 5 days, and the visual analogue scale (VAS) was used to quantify the pain experienced by the subjects before and after laser applications for each day. Analysis of the VAS median scores showed that teeth exposed to laser treatment had lower levels of pain as compared with those with the placebo treatment. However, nonparametric statistical analysis of the data showed that the differences between treatments and placebo within each subject were not statistically significant. (AM J ORTHOD DENTOFAC ORTHOP 1995;108:614-22.)     

A bold venture in Jordan

Summary When making an orthodontic survey in Jordan, the author was impressed by the initiative shown by this small but progressive kingdom and describes how they succeeded in establishing an excellent headquarters building.

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Zusammenfassung Bei Gelegenheit einer orthodontischen Studienreise in Jordanien wurde der Verfasser beeindruckt von der Initiative, die dieses kleine, aber progressive Königreich zeigt, und beschreibt im einzelnen den erfolgreichen Aufbau eines ausgezeichneten Zentrums für Medizin, Zahnheilkunde, Ingenieurwesen Pharmazie und Agrarwissenschaft.

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Résumé L'auteur a eu l'occasion d'effectuer un voyage d'études en Jordanie. Dans ce patit mais très progressif royaume, il décrit la construction très réussie d'un complexe de bâtiments réservé à la médecine, médecine dentaire, pharmacie, et à des écoles d'ingénieurs et d' économie agricole.

     

Some mechanical properties including the repair strength of two self-curing acrylic resins

Self-curing acrylic resins have been used mainly in prosthetic dentistry for the construction of custom-built impression trays, occlusion registration bases and for repairing fractured dentures. Their major disadvantages when compared with heat-cured resins are their relatively poor mechanical properties and a high level of residual monomer. Recently, pour-type resins have been introduced for the fabrication of denture bases. The present study was undertaken to examine some of the mechanical properties of these materials and compare the results with those previously reported.