PMC7006573_01
Extraoral photographs and initial radiographs. (a) Intraoral examination. (b) Sinus tract tracing from the nostril. (c) Radiograph of guttapercha tracing. (d) Radiograph of calcium hydroxide hard packing medication
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F1
Radiographic examination using a gutta-percha point to trace the sinus tract revealed that the origin of the sinus tract was the root apex of the left maxillary central incisor (Fig. 1).
Preoperative CBCT. (a) Cross-sectional view with intersection transverse line on the midline of the left maxillary central incisor. (b) 3D reconstruction image indicates no labial cortical plate at the apical part of the root.(c) Sagittal view image reveals an open apex of the toot hand no labial cortical plate
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F2
Thailand) was performed to examine the sagittal cross-section of the affected left central incisor. The CBCT scan showed a perforation of the buccal bone plate related to the tooth (Fig. 2).
PRF preparation. (a) Collection of blood from the mediancubital vein. (b) Delivery of the blood tube to a PRF centrifugal machine. (c) PRF formation in the blood tube. (d) PRF small pieces. (e) Collagen membrane. (f) Delivery of MTA by a Messing gun
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F3
Blood was obtained from the patient's median cubital vein and transferred to a sterile centrifuge tube (10 mL) without anticoagulant (Fig. 3).
Postoperative CBCT. (a) Cross-sectional view within tersection transverse line on the midline of the left maxillary central incisor. (b) 3D reconstruction image shows the labial cortical plate at the apical part of the root. (c) Sagittal view image reveals labial cortical plate formation and incomplete healing of the apex of the tooth
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F4
An apical closure was also evident (Fig. 4).