Kogon S L
J Periodontol. 1986 Apr;57(4):231-4. doi: 10.1902/jop.1986.57.4.231.
Palato-radicular grooves in maxillary lateral incisors have been implicated as an initiating factor in localized gingivitis and periodontitis. Focal loss of periodontal attachment associated with these grooves, some of which may extend to the apical third of the root, could result in a hopeless prognosis for tooth retention. There is disagreement as to the prevalence of this anomaly. As well, little is known about the shape, location and length of the defect. This study examined 3168 extracted maxillary lateral and central incisors. Of these teeth 4.6% had a palato-radicular groove. About half of the grooves terminated on the root and 58% of these extended more than 5 mm from the cementoenamel junction. A poorly described deformity, displacement of the cementoenamel junction, occurred in 38% of the grooves which crossed that structure. Although an extension of enamel in the groove has been suggested as a possible factor in the progression of localized periodontal disease, its presence was rarely observed.
上颌侧切牙的腭根沟被认为是局部牙龈炎和牙周炎的起始因素。与这些沟相关的牙周附着局部丧失，其中一些可能延伸至牙根的根尖三分之一处，可能导致牙齿保留的预后不佳。关于这种异常的患病率存在分歧。此外，对于缺损的形状、位置和长度知之甚少。本研究检查了3168颗拔除的上颌侧切牙和中切牙。其中4.6%的牙齿有腭根沟。大约一半的沟在牙根上终止，其中58%的沟从牙骨质釉质界延伸超过5毫米。在38%穿过该结构的沟中出现了一种描述不佳的畸形，即牙骨质釉质界移位。尽管有人提出沟内釉质延伸可能是局部牙周病进展的一个因素，但很少观察到其存在。
