Department of Stomatology Faculty of Medicine and Dentistry University of Valencia Gascoì Oliag 1. 46010, Valencia, Spain
Med Oral Patol Oral Cir Bucal. 2022 Jul 1;27(4):e375-e382. doi: 10.4317/medoral.25311.
A study is made of the findings of high-magnification rigid endoscopy at the root end surface following apicoectomy of teeth subjected to periapical surgery.
A cross-sectional study was made of patients subjected to periapical surgery at the Unit of Oral Surgery and Implantology (University of Valencia, Valencia, Spain) between 2011 and 2019. Following apicoectomy, the root end surfaces were inspected, with the evaluation of untreated canals, isthmuses, craze lines, crack lines, opaque dentin and gaps. Likewise, an analysis was made of the association between patient age and the tooth type and restoration and the presence of craze lines, cracks, opaque dentin and gaps.
The final sample consisted of 168 patients subjected to periapical surgery, with 177 operated teeth and 206 roots. Untreated canals were observed in 14 roots (6.8%). Isthmuses were identified in 74 roots (35.9%), particularly in the mesial root of the lower first molar (94.1%). In turn, craze lines were identified in 8.3% of the roots, cracks in 3.9%, and gaps in 53.4%. The prevalence of opaque dentin was 78.3%, with a greater presence in posterior teeth (90.3% in premolars and 86.2% in molars) than in anterior teeth (50.6%) (p<0.001). Patient age and tooth restoration showed no correlation to the studied parameters.
Craze lines and crack lines were observed in less than 10% of the roots, though opaque dentin was identified in 73% of the roots, particularly in posterior teeth, and gaps were found in over half of the canals.
本研究通过高倍刚性内窥镜观察根尖切除术后根尖表面的发现。
本研究为回顾性病例研究，纳入 2011 年至 2019 年期间在西班牙瓦伦西亚大学口腔外科和种植学系接受根尖手术的患者。根尖切除术后，评估未处理的根管、峡部、微裂纹、裂纹、不透明牙本质和间隙。同时，分析患者年龄与牙位、修复类型以及微裂纹、裂纹、不透明牙本质和间隙的存在之间的关系。
最终纳入 168 例接受根尖手术的患者，共涉及 177 颗患牙和 206 个牙根。14 个牙根（6.8%）存在未处理的根管。74 个牙根（35.9%）存在峡部，特别是下颌第一磨牙近中根（94.1%）。8.3%的牙根存在微裂纹，3.9%的牙根存在裂纹，53.4%的牙根存在间隙。不透明牙本质的发生率为 78.3%，后牙（前磨牙 90.3%，磨牙 86.2%）比前牙（50.6%）更为常见（p<0.001）。患者年龄和牙体修复与研究参数之间无相关性。
尽管微裂纹和裂纹在不到 10%的牙根中存在，但 73%的牙根存在不透明牙本质，特别是在后牙，超过一半的根管存在间隙。
