小臼歯部修復におけるオールセラミックオンレーの短期および長期効果ならびに歯科機能に及ぼす影響について検討した

[Short-term and long-term effects of all-ceramic onlay on restoration of premolars and its influence on dental function].

抄録

目的:

小臼歯部修復におけるオールセラミックオンレーの短期的・長期的効果および歯科機能に及ぼす影響について検討すること。

PURPOSE: To investigate the short-term and long-term effects of all-ceramic onlay on restoration of premolars and its influence on dental function.

方法:

2017年1月から2018年1月にかけて北京大学人民病院で根管治療を受けた小臼歯95本を登録し、修復方法の違いにより無作為に2群に分けた。対照群(n=47)の患者にはフルクラウン修復を、実験群(n=48)の患者にはオールセラミックオンレー修復を施した。成功率、生存率、失敗率が比較された。また，治療後6ヶ月，12ヶ月，36ヶ月後に，米国公衆衛生局（USPHS）および人工歯根の咬合機能を比較した．データはSPSS 19.0ソフトウェアパッケージを使用して処理された。

METHODS: Ninety-five premolars receiving root canal treatment in People's Hospital of Peking University from January 2017 to January 2018 were enrolled, and randomly divided into two groups based on different repairing methods. Patients in the control group (n=47) received full crown restoration, while patients in the experimental group(n=48) received all-ceramic onlay restoration. The success, survival and failure rates of the teeth were compared. The United States Public Health Service(USPHS) and occlusal function of the prosthesis were compared 6, 12 and 36 months after treatment. The data were processed using SPSS 19.0 software package.

結果:

実験群の成功率および生存率は、対照群より高かったが、有意差はなかった（P＞0.05）。治療12ヵ月後の形態、辺縁の完全性、辺縁の色調、表面の質感、二次カリエス、歯肉の健康状態、近接接触は両群間に有意差を認めなかった（P＞0.05）。治療後36ヶ月では，マージナルインテグリティ，マージナルカラーリング，サーフェステクスチャーは両群間に有意差を認めなかったが（P＞0.05），形態，二次カリエス，歯肉の健全性，近心接触は実験群が対照群より有意に良好であった（P＜0.05）．また，両群の患側と反対側の咬合機能には，治療後6，12，36ヶ月で有意差は認められなかった（P＞0.05）．

RESULTS: The success and survival rate of the experimental group were higher than those of the control group, but without significant difference (P＞0.05). The morphology, marginal integrity, marginal coloration, surface texture, secondary caries, gingival health and proximal contacts showed no significant difference between the two groups 12 months after treatment(P＞0.05). Thirty-six months after treatment, the marginal integrity, marginal coloration and surface texture showed no significant difference between the two groups (P＞0.05), while the morphology, secondary caries, gingival health and proximal contacts were significantly better in the experimental group than in the control group (P＜0.05). The occlusal function between the affected side and contralateral side of both groups showed no significant difference 6, 12 and 36 months after treatment(P＞0.05).

結論:

小臼歯のオールセラミックオンレー修復は、成功率・残存率が高く、短期的・長期的に良好な修復効果を示し、患歯の咬合機能改善に有効である。

CONCLUSIONS: All-ceramic onlay restoration of premolars has high success and survival rate, and good short-term and long-term restoration effect, which is beneficial to improve the occlusal function of the affected teeth.