Department of Oral Medicine and Periodontology, Faculty of Dentistry Cairo University, Egypt.
Oral and Maxillofacial Surgery, Plastic surgery department, Mainz University, Germany.
J Prosthodont Res. 2024 Apr 8;68(2):347-353. doi: 10.2186/jpr.JPR_D_23_00033. Epub 2023 Aug 11.
A jumping gap (JG) refers to the implant's future buccal wall; this study aims to estimate the jumping gap dimension in relation to virtual implant placement and subsequently link the implant diameter and implant position with the anatomical site.
This observational study was conducted to analyze the maxillary teeth in the esthetic zone from cone-beam computed tomography (CBCT) scans using OnDemand software. The horizontal jumping gap dimension of each tooth was assessed by subtracting the calculated virtual implant diameter from the socket dimensions.
A total of 253 anterior and premolar maxillary teeth were analyzed from 52 CBCT scans. The estimated JG dimensions were 1.23 ± 0.59 mm, 1.80 ± 0.64 mm, 3.02 ± 0.69 mm, for central incisors, lateral incisors and canines respectively, 3.70 ± 0.68 mm for the first premolars showing the highest horizontal gap and 3.19 ± 0.88 mm for second premolars. The incisors showed the smallest horizontal gap compared to the canines and premolars.
In terms of JG, immediate implant placement is more favorable at the canine and premolar sites. By contrast, the incisors sites should be handled with extreme caution, where the use of narrower implants is advisable when necessary.
跳隙（JG）是指种植体未来的颊侧壁；本研究旨在评估与虚拟种植体放置相关的跳隙尺寸，并将种植体直径和种植体位置与解剖部位联系起来。
本观察性研究旨在使用 OnDemand 软件分析来自锥形束 CT（CBCT）扫描的上颌美学区的牙齿。通过从牙槽窝尺寸中减去计算出的虚拟种植体直径来评估每个牙齿的水平跳隙尺寸。
对 52 个 CBCT 扫描的 253 个上颌前牙和前磨牙进行了分析。估计的 JG 尺寸分别为中切牙 1.23±0.59mm、侧切牙 1.80±0.64mm、尖牙 3.02±0.69mm，第一前磨牙的水平间隙最大，为 3.70±0.68mm，第二前磨牙的水平间隙最小，为 3.19±0.88mm。与尖牙和前磨牙相比，切牙的水平间隙最小。
就 JG 而言，犬牙和前磨牙部位更有利于即刻种植体放置。相比之下，切牙部位需要格外小心，必要时应使用较窄的种植体。
