This study aimed to provide the actual size of the denture base which would be stable under functional movement of the cheek, lip and tongue. The subjects were 28 edentulous subjects, who visited Okayama University Hospital, Division of Occlusion and Removable Prosthodontics or were admitted in Shibata Hospital (11 men and 17 women, mean age 82.4±7.4 years). The mandibular base plate was adjusted for each subject to be stable during forceful touching the incisive papilla by the tongue tip, forceful lip pursing and maximal jaw opening. The length of the buccal and lingual flange of the base plate was measured as the distance between the top of the alveolar crest and edge of the flange at 1) median point, 2) buccal frenum point, and 3) molar point which was defined as the mid point between the frenum point and the retromolar pad. The mean bucco-lingual (Labio-lingual) widths of the base plate were 8.4 mm at the median point, 10.2 mm at the buccal frenum point, and 13.7 mm at the molar point for male subjects. The widths for female subjects were 8.8 mm, 11.0 mm, and 14.7 mm, respectively. No significant difference could be observed for the mean values between male and female subjects.

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

The purpose of this study was to investigate postoperativebleedingfor tooth extraction in patients maintained on oral antithrombotic therapy. The subjects were 41 patients who came to the Kasaoka Hospital from April 2009 to December 2010, including15 receiving warfarin alone, 7 receiving warfarin with additional antiplatelet drugs, and 19 receivingantiplatelet drugs alone. A total of 157 teeth were extracted on 94 occasions. All teeth were extracted without reducingthe usual antithrombotic therapy, andagelatin sponge was applied and suturing was performed for local hemostasis. Postoperative hemorrhage occurred in only 2 of 94 occasions of tooth extractions; one case was with warfarin alone and the other case was with warfarin and additional antiplatelet drugs. In both cases, local hemostatic methods, biting downongauze for compression and applyingsprint for hemostasis, were successful in 30 minutes when postoperative hemorrhage occured. Serious thromboembolisms includingfatal cases have been previously reported in 1% cases when tooth extraction was enforced with discontinuinganticoagulant therapy. Therefore, tooth extraction under the condition of continuing oral antithrombotic therapy was recommended by the guideline of the Japanese Circulation Society in 2004. However, accordingto a survey in 2007, many physicians and dentists still reduced or stopped temporarily anticoagulant or antiplatelet drugs in spite of the guideline. We considered it important to sensitize both medicine and dentistry professionals to the importance of appropriate dental treatment for elderly people with antithrombotic therapy, whose numbers are increasingin Japan.

View full abstract

[in Japanese]

View full abstract