Sajnani Anand K, King Nigel M
Bin Muftah Medical Centre, Doha, Qatar.
J Investig Clin Dent. 2013 Nov;4(4):252-6. doi: 10.1111/j.2041-1626.2012.00163.x. Epub 2012 Dec 14.
Numerous clinical signs may be indicative of a canine impaction; however, studies determining the efficiency of visual inspection and digital palpation in localizing an impacted maxillary canine are sparse. Of the radiographic techniques, no studies have compared the accuracy of the horizontal and the vertical parallax techniques to determine the location of an impacted canine. Hence, the objectives of this study were to evaluate the efficiency of visual inspection and digital palpation, and to compare the accuracy of the horizontal and vertical parallax techniques in determining the location of an impacted maxillary canine.
The study sample comprised the records of 522 patients who had attended a dental hospital. The location of an impacted maxillary canine was determined radiographically using the vertical and the horizontal parallax principles. The findings were then confirmed from the surgical records in those cases that had undergone surgical intervention of the impacted canine.
The position of the impacted canine was determined successfully by visual inspection and digital palpation in 85.3 and 85.2% of the cases respectively.
The vertical parallax technique demonstrated a higher degree of accuracy (97.7%) and a greater degree of diagnostic capability (98.2%) when compared with the horizontal parallax technique (92.6 and 78.0% respectively).
众多临床体征可能提示犬牙阻生；然而，关于确定视诊和指诊在上颌阻生犬牙定位中有效性的研究较少。在影像学技术方面，尚无研究比较水平和垂直平行投照技术在确定阻生犬牙位置上的准确性。因此，本研究的目的是评估视诊和指诊的有效性，并比较水平和垂直平行投照技术在确定上颌阻生犬牙位置上的准确性。
研究样本包括522名到牙科医院就诊患者的记录。使用垂直和平行投照原理通过影像学确定上颌阻生犬牙的位置。然后在那些对阻生犬牙进行了手术干预的病例中，从手术记录中确认结果。
分别有85.3%和85.2%的病例通过视诊和指诊成功确定了阻生犬牙的位置。
与水平平行投照技术（分别为92.6%和78.0%）相比，垂直平行投照技术显示出更高的准确性（97.7%）和更强的诊断能力（98.2%）。
