2013 Fiscal Year Final Research Report
Synthetic study of the causes of non carious cervical lesions
| Project/Area Number |
22570221
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Physical anthropology
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| Research Institution | Nihon University |
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Principal Investigator |
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| Project Period (FY) |
2010-04-01 – 2014-03-31
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| Keywords | 非齲蝕性歯頸部硬組織欠損 / NCCL / 歯種 / 表面の輪郭 / 断面形態 / 出現頻度 |
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| Research Abstract |
Non carious cervical lesions (NCCL) were examined on modern Japanese 6572 teeth: from central incisors to the second molars, on left and right sides, on maxilla and mandibles. The frequencies of NCCLs were the highest on canines and the first premolars (40~60%). NCCLs were most frequently found on buccal (labial) sides on most teeth, but on the second molars, on lingual sides. The morphology of NCCLs were classified by the contour on the surface ( cord, horizontal oval, vertical oval, belt, irregular ) and the shape on the cross section ( round, wedge, smooth, irregular ). On the lingual surfaces of frontal teeth, vertical – round type was dominant, on the buccal surfaces of premolars, cord – wedge type was dominant, and on the mesial and distal surfaces of molars, horizontal – round type was dominant.
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