Long-term follow-up of maxillary fixed retention: survival rate and periodontal health.

AIM To assess the long-term success of maxillary fixed retainers, investigate their effect on gingival health, and analyse the survival rate after a mean period of 7 years (minimum 5 years) in retention. SUBJECTS AND METHODS Forty one subjects were included in the study A clinical examination of the upper canine to canine region including gingival index (GI), plaque index, probing depth, and bleeding on probing (BOP) was performed. Intraoral photographs and dental impressions were taken and irregularity index was determined and compared to the values of the immediate post-therapeutic values; failures of retainers were also recorded and analysed. RESULTS The mean observed retention time was 7 years and 5 months. Irregularity index: Changes occurring during retention were statistically different between the lateral incisors bonded to retainers and the canines not bonded to retainers. Only six patients showed changes in irregularity index of the lateral incisors in spite of a retainer in place. Periodontal health: The median value of the GI for all teeth bonded to upper retainers was 1.10 and the median value of the plaque index (PI) was 1.14. PI was not a significant predictor of GI. The overall BOP of the bonded teeth to the retainer for each participant was 22.3 per cent. Failure rate: Twenty-eight out of 41 patients experienced no failure of the upper bonded retainer (68.3 per cent). Detachments were the most frequent incidents. CONCLUSION Although plaque accumulation might be increased in patients with already poor oral hygiene, maxillary bonded retainers caused no significant negative effects on the periodontal health.

Geochemistry and ages at DSDP Hole 19-192A

Conventional K-Ar and 40Ar/39Ar age data on altered basalts from DSDP Hole 192A on Meiji Guyot, Emperor Seamount chain, indicate a minimum age for the volcano of 61.9 ± 5.0 m.y. The K-Ar data are consistent with the early Maestrichtian date of the overlying sediments, but do not provide either a positive or negative test of the hypothesis that Meiji is older than Emperor volcanoes to the south. The most prominent alteration affecting the age measurements is potassium metasomatism, particularly of feldspar phenocrysts. The K-Ar apparent ages of feldspar separates from the Meiji basalts show that more than half of the potassium metasomatism occurred within the last 25 m.y. or so, and that if the potassium replacement rate has been constant, then the alteration of the Meiji basalts did not begin for 10 to 20 m.y. after the volcano formed.

The officer's manual. Military maxims of Napoleon.

Contains 68 maxims, annotated by M. Burnod.

Memoirs of the Emperor Jahangueir /

Mode of access: Internet.

Rome of the kings; an archæological setting for Livy and Virgil,

"Select bibliography": p. 237-242.

Supplementary papers of the American School of Classical Studies in Rome. v. 1-2 ...

Papers of the school were ordinarily published in the American Journal of Archaeology, 2d. ser.; supplementary volumes wre authorized when material for publication either exceeded the space available in the journal, or when it was of such a nature as to make a different mode of publication advisable. (cf. v. 1, Prefatory note) The present volumes form the only collection of papers issued separately by the school in Rome. (Lists of the papers published in other journals, 1898-1907, may be found in the Supplementary papers, v. 1-2, Prefatory note) From 1909-12, the reports, etc., of the school were published in the Bulletin of the Archaeological Institute of America. On January 1, 1913, the American School of Classical Studies in Rome became a part of the American Academy in Rome.

A narrative of events connected with the first abdication of the Emperor Napoleon, his embarkation at Frejus and voyage to Elba, on board His Majesty's ship Undaunted.

Mode of access: Internet.

History of the expedition to Russia, undertaken by the Emperor Napoleon, in the year 1812.

Mode of access: Internet.

The Tezkereh al vakiāt : or, Private memoirs of the Moghul Emperor Humayun /

On spine: Memoirs of Humāyūn.

The Sacred edict; containing sixteen maxims of the Emperor Kang-He,

The "paraphrase ... by a mandarin" is the coloquial version of Wang Yu-pʻu.

Memorandum of two conversations between the Emperor Napoleon and Viscount Ebrington at Porto Ferrajo, on the 6th and 8th of December, 1814.

Mode of access: Internet.