Xu Duoling, Xie Chengjie, Yu Huimin, Zhang Zhiyong, Zheng Junfa, Xu Shulan
Department of Periodontology, Stomatological Hospital, Southern Medical University, Guangzhou, 510280, China.
Department of Radiology, Stomatological Hospital, Southern Medical University, Guangzhou, 510280, China.
J Dent Sci. 2021 Jan;16(1):229-235. doi: 10.1016/j.jds.2020.05.021. Epub 2020 Jun 8.
BACKGROUND/PURPOSE: In the immediate implantation of maxillary central incisors, the height of the alveolar bone is lost, and there is often a risk of bone fracture due to the thin buccal bone wall (BBW). The purpose of this study was to assess the effects of smoking, age, and root position in the alveolar bone on the BBW and the distance between the cemento-enamel junction (CEJ) and the facial bone crest (FBC) of Chinese maxillary central incisors.
The patients were divided by smoking, gender, age, and root sagittal position in the alveolar bone. BBW thickness was measured at the following sites: the 4 mm apical to the CEJ, the middle of the root, and the apex. The distance from the CEJ to the FBC was also evaluated.
Cone beam CT (CBCT) data for the maxillary central incisors of 645 patients (323 males and 322 females) were selected and analyzed. The CEJ-FBC distance in patients who smoked (2.79 ± 0.78 mm) was significantly greater than that of non-smokers (2.54 ± 0.69 mm). The BBW in subtype III (0.74 ± 0.43 mm, 0.81 ± 0.36 mm) was thinner than that in subtypes I and II at 4 mm apical to the CEJ and in the middle of the root, with a statistically significant difference ( < 0.05).
In most Chinese people, smoking, gender, age, and the position of the root in alveolar bone are all important factors that must be considered before immediate implantation is undertaken.
背景/目的：在上颌中切牙即刻种植时，牙槽骨高度会丧失，且由于颊侧骨壁（BBW）薄，常存在骨折风险。本研究的目的是评估吸烟、年龄以及牙槽骨中的牙根位置对中国人群上颌中切牙BBW以及牙骨质-釉质界（CEJ）与面部牙槽嵴顶（FBC）之间距离的影响。
患者按吸烟情况、性别、年龄以及牙槽骨中牙根矢状位进行分组。在以下部位测量BBW厚度：CEJ根尖4mm处、牙根中部和根尖。还评估了从CEJ到FBC的距离。
选取并分析了645例患者（323例男性和322例女性）上颌中切牙的锥形束CT（CBCT）数据。吸烟患者的CEJ-FBC距离（2.79±0.78mm）显著大于不吸烟患者（2.54±0.69mm）。在CEJ根尖4mm处和牙根中部，III型亚型的BBW（0.74±0.43mm，0.81±0.36mm）比I型和II型亚型更薄，差异有统计学意义（<0.05）。
在大多数中国人中，吸烟、性别、年龄以及牙槽骨中牙根的位置都是在上颌中切牙即刻种植前必须考虑的重要因素。
