Pesaro, Italy.
Surgical Division, ARDEC Academy, Rimini, Italy.
Clin Exp Dent Res. 2021 Aug;7(4):474-483. doi: 10.1002/cre2.380. Epub 2020 Dec 21.
The aim of the present retrospective study was to evaluate papillae filling rate and buccal margins coronal growth in implant-supported prostheses which were over-contoured at the apical buccal third to form a rearmost collar zone, thus mimicking a false root.
The influence of adjacent elements, teeth, implants, or pontics was examined. One-hundred and three crowns have been assessed in photographs taken on 61 patients after prosthesis delivering and at last follow-up (mean 2.8 years). The Jemt index was adopted to evaluate papillae growth at the baseline and follow-up as follows: 0, absence of papilla; 1, less than half of interdental embrasure height; 2, more than half of interdental embrasure height; 3, fully papilla filled interdental embrasure. Index score 4, papilla hyperplasia was not included. Moreover, the coronal growth (or recession) of buccal mucosa in implant-supported crowns was assessed.
At baseline, a total of 29 papillae had a 0 score, while only two scored 3 with complete papilla formation. On follow-up, only one papilla scored 0, while 46 scored 3 with complete interdental embrasures filling. The highest papilla score was registered from first year crown insertion and likewise in interdental embrasures located between two implants or implants and pontics. Moreover, the buccal margin growth was observed in almost 80% of crowns. Such findings seem to indicate that buccal margin and papilla around implant-supported crowns presented a coronal growth over time, especially during its first year. The average papilla growth between two implants was no lower than that observed in papilla present between implants and natural teeth.
Recessed areas at collar of implant-supported prostheses appear to positively influence papillae and buccal margin growth, especially in its first year. Papilla growth between two implants was similar to that observed between implants and natural teeth.
本回顾性研究的目的是评估在上颌颊侧 1/3 过度塑形以形成后缘领圈区从而模拟假根的种植体支持修复体的牙间乳头充盈率和颊侧边缘的冠向生长。
研究检查了相邻的牙、种植体或桥体的影响。在 61 名患者的 103 个牙冠修复体交付后和最后一次随访（平均 2.8 年）时拍摄的照片中评估了牙间乳头的生长情况。采用 Jemt 指数评估牙间乳头在基线和随访时的生长情况：0 分为无牙间乳头；1 分为龈乳头少于 1/2 邻间隙高度；2 分为龈乳头大于 1/2 邻间隙高度；3 分为龈乳头完全充满邻间隙。4 分为未包括牙间乳头过度生长。此外，还评估了种植体支持牙冠的颊侧黏膜的冠向生长（或退缩）。
基线时，共有 29 个牙间乳头的评分为 0，只有 2 个牙间乳头的评分达到 3，完全形成牙间乳头。随访时，只有 1 个牙间乳头的评分为 0，而 46 个牙间乳头的评分达到 3，完全充满邻间隙。第一年牙冠插入时记录的牙间乳头评分最高，同样在两个种植体或种植体和桥体之间的牙间间隙中也有记录。此外，近 80%的牙冠观察到颊侧边缘的生长。这些发现表明，随着时间的推移，种植体支持牙冠周围的颊侧边缘和牙间乳头呈现出冠向生长，尤其是在第一年。两个种植体之间的牙间乳头生长不低于种植体和天然牙之间观察到的牙间乳头生长。
种植体支持修复体领圈处的凹陷区域似乎对牙间乳头和颊侧边缘的生长有积极影响，尤其是在第一年。两个种植体之间的牙间乳头生长与种植体和天然牙之间的牙间乳头生长相似。
