Dentistry Department, Aga Khan University Hospital, Karachi, Pakistan.
Dent Med Probl. 2024 Jan-Feb;61(1):65-70. doi: 10.17219/dmp/133072.
Immediate implant placement in the maxillary esthetic zone is a challenging and demanding task. To achieve favorable results, proper case selection and treatment planning are necessary. Variables like the sagittal root position (SRP) and the labial bone thickness (LBT) of maxillary anterior teeth are of paramount importance for predictable outcomes.
The aim of the present study was to evaluate the SRP and LBT of maxillary anterior teeth in the context of immediate implant placement by using cone-beam computed tomography (CBCT) in a sample of the Pakistani population.
A cross-sectional study was conducted using the CBCT scans of patients. The SRP of each tooth (maxillary canine to canine) was evaluated in the sagittal section of a CBCT scan according to the classification by Kan et al. The LBT of each tooth was measured perpendicularly to the long axis of tooth at 3 sites: at the alveolar crest (P1); 2 mm from the alveolar crest (P2); and 4 mm from the alveolar crest (P3). Descriptive statistics were reported for SRP and LBT. The χ2 test was employed to assess any association between the variables.
Class I SRP was the most prevalent (n = 196, 81.7%), while Class III was the least frequent (n = 1, 0.4%). The association between the tooth type and SRP was statistically non-significant (p = 0.510).
In the evaluated sample of the Pakistani population, the most frequent type of the SRP of maxillary anterior teeth was Class I, which is most favorable for immediate implant placement. Furthermore, the labial bone in the maxillary esthetic zone was found to be mostly thin - LBT was within the range of 0.5-0.9 mm - which makes immediate implant placement in the anterior maxilla a challenge. The results of the present study could serve as a guide for clinicians in terms of appropriate patient selection for immediate implant placement in the maxillary esthetic zone.
在上颌美学区即刻植入种植体是一项具有挑战性和要求很高的任务。为了获得良好的效果，需要进行适当的病例选择和治疗计划。上颌前牙矢状根位置（SRP）和唇侧骨厚度（LBT）等变量对于可预测的结果至关重要。
本研究旨在通过使用锥形束计算机断层扫描（CBCT）评估巴基斯坦人群中即刻种植体植入时上颌前牙的 SRP 和 LBT。
使用患者的 CBCT 扫描进行横断面研究。根据 Kan 等人的分类，在 CBCT 扫描的矢状面评估每个牙齿（上颌尖牙到尖牙）的 SRP。在 3 个部位（牙槽嵴顶 P1、牙槽嵴顶 2mm 处 P2 和牙槽嵴顶 4mm 处 P3）垂直于牙齿长轴测量每个牙齿的 LBT。报告 SRP 和 LBT 的描述性统计数据。采用 χ2 检验评估变量之间的任何关联。
I 类 SRP 最常见（n = 196，81.7%），而 III 类最不常见（n = 1，0.4%）。牙齿类型与 SRP 之间的关联无统计学意义（p = 0.510）。
在所评估的巴基斯坦人群样本中，上颌前牙 SRP 最常见的类型是 I 类，这最有利于即刻种植体植入。此外，上颌美学区唇侧骨较薄，LBT 范围在 0.5-0.9mm 之间，这使得在上颌前牙即刻植入种植体具有挑战性。本研究的结果可以为临床医生在选择合适的患者进行上颌美学区即刻种植体植入方面提供指导。
