コーンビームCTスキャンを用いた上顎洞に対する後上歯槽動脈の位置の評価

Evaluation of the position of the posterior superior alveolar artery in relation to the maxillary sinus using the Cone-Beam computed tomography scans.

抄録

背景:

本研究の目的は、CBCT画像上で、後上歯槽骨動脈の直径、位置関係、および歯槽骨稜、上顎洞内壁、病的状態の有病率、上顎洞隔壁との関係を評価することである。

BACKGROUND: The aim of the present study was to evaluate the diameter, relationship and position of the posterior superior alveolar artery and its relationship with the alveolar ridge, the medial wall of the maxillary sinus, the prevalence of pathologic conditions and the maxillary sinus septa on CBCT images.

材料と方法:

20歳以上の患者の合計200枚のCBCT画像（400個の上顎洞）を評価した。動脈の下縁と歯槽堤間の距離、動脈と副鼻腔内壁間の距離、動脈の直径を測定した。動脈の位置、病的状態および隔壁の有無は、a)後方領域が無歯顎の男性、b)後方領域に歯がある男性、c)後方領域が無歯顎の女性、d)後方領域に歯がある女性の後方領域で記録した。

MATERIAL AND METHODS: A total of 200 CBCT images (400 maxillary sinuses) of patients over 20 years of age were evaluated. The distances between the lower border of the artery and the alveolar crest and between the artery and the medial wall of the sinus and the diameter of the artery were measured. The position of the artery, the presence of pathologic conditions and septa were recorded in the posterior region in: a) males edentulous in the posterior region; b) males having teeth in the posterior region; c) females edentulous in the posterior region; and d) females having teeth in the posterior region.

結果:

グループ分けにかかわらず、動脈と歯槽堤の平均距離は16.17±1.63mmであり、グループ間で有意差があった（<0.05）。動脈と洞内壁間の平均距離は11.65±1.21mmで、群間に有意差はなかった（=0.796）。管の平均直径は1.37±0.44mmで、4群間に有意差はなかった（=0.570）。動脈の位置は、73.2％が骨洞内、21.7％が副鼻腔膜下、4.9％が副鼻腔外側壁であった。上顎洞の病的状態および隔壁の全有病率は、それぞれ45.7％および26％であった。

RESULTS: The mean distance between the artery and the alveolar crest, irrespective of groupings, was 16.17±1.63 mm, with significant differences between the groups (<0.05). The mean distance between the artery and the medial wall of the sinus was 11.65±1.21 mm, with no significant differences between the groups (=0.796). The mean diameter of the canal was 1.37±0.44 mm, with no significant differences between the 4 groups (=0.570). The position of the artery was intraosseous in 73.2%, beneath the sinus membrane in 21.7% and external to the lateral wall of the sinus in 4.9% of the cases. The overall prevalence rates of pathologic conditions and septa in the maxillary sinus were 45.7% and 26%, respectively.

結論:

CBCT法は、上顎洞の変化、上顎洞の隔壁や病的存在の可能性を評価するのに有用である。上顎洞、上顎動脈、コーンビームCT。

CONCLUSIONS: CBCT technique is useful for such evaluations and for possible variations in maxillary sinuses and presence of septa and pathologic entities in maxillary sinuses. Maxillary sinus, maxillary artery, Cone-Beam computed tomography.