IADR Abstract Archives
Vertical Incision is a Factor of Postoperative Bleeding on Warfarin
Objectives: This study aimed to evaluate the relationship between the incidence of postoperative bleeding after tooth extraction and causes of postoperative bleeding in elderly patients on warfarin.
Methods: This study was a retrospective study including the elderly patients aged over 65-years old on warfarin, who underwent single or multiple teeth extractions. Exclusion criteria were as followed: patients did not take warfarin at the day of extraction, and PT-INR was 3.0 or higher before extraction. Patients were unable to follow instructions due to neuropathy. Mandibular impacted wisdom teeth extractions were also excluded.
The primary endpoint was the occurrence of postoperative bleeding, defined as oozing or bleeding for 24 hours to 7 days after tooth extraction.
The incidence of postoperative bleeding was also calculated for cases in which longitudinal incisions were intentionally made during tooth extraction or in which longitudinal incisions were made due to gingival tears.
Fisher's exact test was used to analyze between the incidence of longitudinal incisions and postoperative bleeding.
Results: There were 12 patients with both vertical incision and postoperative bleeding, 23 patients with no vertical incision and postoperative bleeding, 3 patients with vertical incision and no postoperative bleeding, and 164 patients with neither vertical incision nor postoperative bleeding. Fisher's exact test showed a significant difference, showing that p=0.0015(p<0.01) postoperative bleeding was significantly higher when there was a vertical incision. There were not significant difference between PT-INR under 3.0 and postoperative bleeding.
Conclusions: This retrospective study revealed that the longitudinal incision has an impact on the occurrence of postoperative bleeding in the patients on warfarin. When performing extractions, surgeons should be mindful of the impact of longitudinal incisions on postoperative bleeding.
Methods: This study was a retrospective study including the elderly patients aged over 65-years old on warfarin, who underwent single or multiple teeth extractions. Exclusion criteria were as followed: patients did not take warfarin at the day of extraction, and PT-INR was 3.0 or higher before extraction. Patients were unable to follow instructions due to neuropathy. Mandibular impacted wisdom teeth extractions were also excluded.
The primary endpoint was the occurrence of postoperative bleeding, defined as oozing or bleeding for 24 hours to 7 days after tooth extraction.
The incidence of postoperative bleeding was also calculated for cases in which longitudinal incisions were intentionally made during tooth extraction or in which longitudinal incisions were made due to gingival tears.
Fisher's exact test was used to analyze between the incidence of longitudinal incisions and postoperative bleeding.
Results: There were 12 patients with both vertical incision and postoperative bleeding, 23 patients with no vertical incision and postoperative bleeding, 3 patients with vertical incision and no postoperative bleeding, and 164 patients with neither vertical incision nor postoperative bleeding. Fisher's exact test showed a significant difference, showing that p=0.0015(p<0.01) postoperative bleeding was significantly higher when there was a vertical incision. There were not significant difference between PT-INR under 3.0 and postoperative bleeding.
Conclusions: This retrospective study revealed that the longitudinal incision has an impact on the occurrence of postoperative bleeding in the patients on warfarin. When performing extractions, surgeons should be mindful of the impact of longitudinal incisions on postoperative bleeding.