Radiographic study of the distribution of maxillary intraosseous vascular canal in Koreans

Abstract

BackgroundThis study aimed to investigate the distribution and prevalence of intraosseous loop (anastomosis between posterior superior alveolar artery and infraorbital artery) in Koreans detected on computed tomography (CT) images taken prior to sinus augmentation surgery.MethodsFrom the 177 patients who underwent sinus augmentation with lateral approach at Ewha Womans University Department of Implant Dentistry, 284 CT scans were evaluated. The canal height (CH), ridge height (RH), and canal height from the sinus floor (CHS) were measured on para-axial views at the first premolar, first molar, and second molar. The horizontal positions of the bony canals in the lateral wall were also classified. One-way analysis of variance (ANOVA) and t test were used to estimate the statistical differences (p < 0.05).ResultsThe intraosseous loops were detected in 92 CT scans (32 %). The mean vertical height of the bony canals from the alveolar crest (CH) was 23.45 ± 2.81, 15.92 ± 2.65, and 16.61 ± 2.92 mm at the second premolar, first molar, and second molar, respectively. In the horizontal positions of the bony canals, intraosseous type was the most predominant. The canal heights more than 15 mm and less than 17 mm were most prevalent (33.7 %) and those under 13 mm were 12.0 %.ConclusionsThe radiographic findings in this study could be used to decide the lateral osteotomy line avoiding potential vascular complication. However, only one third of the canals could be detected in CT scans; a precaution should be taken for the possibility of severe bleeding during lateral osteotomy.

The radiological evaluation of posterior superior alveolar artery topography by using computed tomography

“…16 To reduce the risk of sinus membrane perforation, piezoelectric devices were recommended instead of rotary tools. 17,21 In this study, the average ridge height was noted between 6.23 ± 3.31 and 16.32 ± 4.06 mm for all posterior teeth, and it was lower in molar regions than premolars. 17,21 In this study, the average ridge height was noted between 6.23 ± 3.31 and 16.32 ± 4.06 mm for all posterior teeth, and it was lower in molar regions than premolars.…”

“…In the literature, the mean ridge height was presented between 3.6 and 17.56 ± 3.30 mm. 17,21 In this study, the average ridge height was noted between 6.23 ± 3.31 and 16.32 ± 4.06 mm for all posterior teeth, and it was lower in molar regions than premolars. In accordance with the literature, the width of residual ridge was measured both wider apically, 24 and posteriorly in the present study.…”

“…[17][18][19] Watanabe et al 20 for second molar region. 21 As parallel to the literature, prevalence of PSAA in first premolar, second premolar, first molar, and second molar regions 38.98%, 63%, 51.7%, and 31.92%, respectively. Besides, PSAA was visualized more often at the right side.…”

Application of nano-hydroxyapatite/chitosan scaffolds on rat calvarial critical-sized defects: A pilot study

“…After shaving and disinfecting with povidone-iodine (Betadine Solution, Lavipharm, Athens, Greece) a 2cm-sized longitudinal mid-sagittal skin incision was made in the scalp. The musculature and the mucoperiosteum were exposed and dissected ( 22 , 23 ). Using a dental drill (Implantmed, W&H, Bürmoos, Austria) with a 5 mm diameter dental trephine burr (MT-00500, MIS, Savion, Israel), two symmetrical round bone defects were made in the dorsal part of the right and the left parietal bones (Fig.…”

“…As bone regeneration process from the edge towards the center of the defect, bone formation was evaluated separately on the central and two lateral areas of the defect ( 22 , 23 ), defined as Regions of Interest (ROI), as follows: (a) lateral area inward of the middle sagittal seam (late-ral 1, l1); (b) lateral area outward of the middle sagittal seam (lateral 2, l2) and (c) central area (c, central) (Fig. 2 ).…”