本研究の目的は歯周病患者の臨床症状として, 欠かすことの出来ないX線写真による骨吸収に重点をおいて診査し, 同部位のポケットの状態, 炎症の程度, 歯の動揺度との関係と特徴をとらえるために統計的に検討した。
その結果, (1) 上下顎中切歯部において骨吸収が多く見られるが, ポケットの深さは平均2.6mm前後であった。 (2) 上下顎第一大臼歯部では骨吸収量は中切歯部に比べ少ないが, ポケットは平均約3.0mmであった。 (3) 骨吸収量の増加に伴い, 動揺度の値も大きくなる傾向が見られた。 (4) 骨吸収量の大きい中切歯部において歯肉炎症指数 (GI) も高い結果であった。 (5) 骨吸収パターンは約8割が水平型で遠心側に, 約2割が垂直型で近心側に多く見られた。

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In clinical oral surgery, we often encounter cases of infants who fall down while holding a toothbrush in their mouth and receive an oral injury from a toothbrush. This particular case was that of a 5-year-old girl who accidentally injured her left buccal mucosa with a toothbrush. After the injury, she was immediately brought to the hospital by ambulance. When she arrived at our hospital, the toothbrush was still embedded in the oral wound. We examined her oral wound by computer tomography (CT). We found that the tip of the toothbrush was located in the vicinity of the left medial pterygoid muscle, and there was neither damage from the toothbrush itself nor on the maxillary artery and basal skull. We removed the toothbrush carefully under local anesthesia, and then cleaned the wound by adequate normal saline and administered antibacterial drugs (SBT/ABPC) intravenously. No serious complications were seen after the treatment.
It is strongly suggested that in such a case an immediate examination be conducted by CT in order to avoid severe complications and to insure a good healing process.

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歯周病の罹患状態および歯周病に対する意識について, 新しい指数であるCPITNと初診時のアンケート調査を併せて検討を行った。調査は, 一診療所における34～62歳の初診患者494名 (男性426名, 女性68名, 平均年齢47.9歳) を対象に実施した。その結果, 歯周病に対する認識, 理解度は, コードが高い群ほど著明に認められたが, 歯周治療および予防処置において重要なブラッシング, スケーリング, 定期的なメインテナンス治療については, 実際の歯周病罹患状態との間に開きが認められた。このことから歯周治療を行う際, その罹患状態に対応した各人へのモチベーションの必要性が示された。

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The morphological characteristics of periodontal tissue in periodontal disease have been interpreted differently by a number of clinical observers. Many have reported that the malposition and functional malocclusion of teeth is injurious to the periodontium. We reported in Part I that a system for evaluating periodontal status was developed for the diagnosis and management of the interproximal area at the initial stage of bone resorption. The patient group consisted of 36 adults, from 21 to 55 years of age. The severity score represented the calculated loss of periodontal support tissues: loss of alveolar bone, evaluated roentgenologically, bone level and pattern in vertical and horizontal form, periodontal pocket and gingival inflammation. Because poor oral hygiene and other factors caused swelling by gingival inflammation, we obtained study specimens from patients with chronic periodontal disease after a few tooth brushing instructions, and scalings during initial therapy in order to detect initial and established pathological changes in periodontal tissue.
The purpose of this study was to clarify the relationship between periodontal disease status and morphological diagnostic indicators and different degrees of harmony and disharmony in the lower jaw. In all age groups the average percentage of bone loss and intraosseous defects tended to be higher in the groups categorized as Type III and Type F, and in the area that showed a very deep concave Spee curve to the occlusal plane in Pattern D.
We considered that these morphological characteristics might be of secondary importance for diagnosis. Oral local factors were the primary extrinsic factor in the pathogenesis of horizontal and vertical interproximal bone absorption in the area of the premolars and molars.

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