BACKGROUND To date, the clinical evidence regarding the effectiveness of alveolar ridge preservation (ARP) in restricting alveolar bone height and width change after extraction at periodontally compromised molar extraction sockets still remains controversial. This retrospective cohort study aims to evaluate the effect of ARP in molars extracted for periodontal reasons. METHODS Retrospective data were collected from patient electronic records from January 2019 to December 2023. Patients with Stage III/IV periodontitis who underwent extraction of molars for periodontal reasons were screened for eligibility. The outcomes included the horizontal and vertical dimensions of alveolar bone. The need for additional augmentation procedure during implantation was also evaluated. A linear regression model was used to adjust for known confounders. RESULTS A total of 80 sockets were included in this study, of which 27 sockets received ARP therapy after extraction while 53 sockets experienced natural healing (NH). ARP resulted in significantly less bone height change in the periodontally compromised molar sites compared to the NH group (p < 0.001). In sockets displaying a height disparity of >2 mm between the buccal and palatal/lingual walls, the ARP group exhibited advantageous outcomes in terms of ridge width change, surpassing the NH group (p = 0.004). Moreover, the percentage for additional augmentation was significantly reduced in the ARP compared to the NH group (p = 0.006). Age, sex, smoking, jaw, location, and buccal wall thickness did not show any significant effect on bone height change. CONCLUSION ARP had benefits on limiting ridge resorption subsequent to molar extraction for periodontal reasons.

中文翻译：

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牙槽嵴保存对牙周受损的磨牙拔牙槽的影响：一项回顾性队列研究。


背景迄今为止，关于牙槽嵴保留（ARP）在限制牙周受损磨牙拔牙窝拔牙后牙槽骨高度和宽度变化的有效性的临床证据仍然存在争议。这项回顾性队列研究旨在评估 ARP 对因牙周原因拔除的磨牙的影响。方法 从 2019 年 1 月至 2023 年 12 月的患者电子记录中收集回顾性数据。对因牙周原因接受拔牙的 III/IV 期牙周炎患者进行资格筛选。结果包括牙槽骨的水平和垂直尺寸。还评估了植入期间是否需要额外的增强手术。使用线性回归模型来调整已知的混杂因素。结果 本研究共纳入 80 个牙槽窝，其中 27 个牙槽窝在拔牙后接受了 ARP 治疗，53 个牙槽窝经历了自然愈合 (NH)。与 NH 组相比，ARP 导致牙周受损磨牙部位的骨高度变化显着减少 (p < 0.001)。在颊壁和腭/舌壁之间显示高度差异 > 2 mm 的牙槽窝中，ARP 组在牙槽嵴宽度变化方面表现出有利的结果，超过了 NH 组 (p = 0.004)。此外，与 NH 组相比，ARP 组中额外增强的百分比显着降低 (p = 0.006)。年龄、性别、吸烟、下颌、位置和颊壁厚度对骨高度变化没有显示出任何显着影响。结论 ARP 对于限制因牙周原因拔牙后的牙槽嵴吸收有好处。