Influence of Crestal Implant Position and a Smooth Collar on Marginal Bone Level: A 2-Year Retrospective Radiographic Analysis.

IF 1.3 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE
Roger Matar, Nada Naaman, Safa Mansour, Michel Karouni, Akl Fares, Hadi Antoun
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引用次数: 0

Abstract

This retrospective study evaluated the survival rate and the clinical outcome of an endosseous implant system, as well as the marginal bone level (MBL) and the impact of the machined collar neck position on crestal bone level changes up to 2 years later. A total of 96 implants were placed in 57 patients and loaded with a final restoration after at least 3 months of healing: 15 implants were immediately placed into fresh extraction sockets, and 81 were placed in healed ridges. Marginal bone loss around implants was determined radiographically at 12 to 24 months postloading. The effects on marginal bone loss of the site (mandible vs maxilla), location (anterior vs posterior), immediate vs delayed implant, smoking habit, sex, implant length and diameter, prosthesis type (screw-retained/cemented), and the machined collar position were evaluated. The implant survival rate was 98.96% at 1 year. The mean MBL decreased significantly (0.238 mm) between baseline and loading (P < .001; post hoc test) and decreased by 0.154 mm between loading and 1 year, but this was not significant (P = .085; post hoc tests). After 2 years, the mean MBL decreased significantly (0.263 mm) between baseline and loading (P < .001) and decreased by 0.111 mm between loading and 1 year and by 0.199 mm between loading and 2 years, but these were not significant (P > .05; post hoc tests). The mean bone loss after 1 and 2 years was not significantly associated with implant type or site, smoking habit, or type of implant surgery (P = .792). However, the mean bone loss was significantly associated with the type of prosthesis and was significantly greater for cemented prostheses compared to screw-retained prostheses. A supracrestal position of the machined collar (tissue level) was associated with no bone loss, while placing the collar below the alveolar crest led to bone loss over 2 years. Of the factors evaluated, marginal bone loss after 1 and 2 years was significantly associated with prosthesis type and the machined collar position.

种植体位置和光滑项圈对边缘骨水平的影响:2年回顾性放射学分析。
这项回顾性研究评估了骨内植入系统的生存率和临床结果,以及边缘骨水平(MBL)和2年后机械加工的颈圈位置对冠骨水平变化的影响。57名患者共植入96个植入物,并在至少3个月的愈合后进行最终修复:15个植入物立即放入新鲜的提取窝中,81个植入物放入愈合的嵴中。植入物周围的边缘骨丢失是在加载后12至24个月通过射线照相确定的。评估了对该部位边缘骨丢失的影响(下颌骨与上颌骨)、位置(前部与后部)、立即植入与延迟植入、吸烟习惯、性别、植入长度和直径、假体类型(螺钉保留/骨水泥)和机加工项圈位置。种植体1年生存率为98.96%。平均MBL在基线和负荷之间显著降低(0.238 mm)(P<.001;事后检验),在负荷和1年之间降低0.154 mm,但这并不显著(P=.085;事后检验。2年后,平均MBL在基线和负荷之间显著下降(0.263 mm)(P<.001),在负荷和1年之间下降0.111 mm,在负荷到2年之间下降0.199 mm,但这些都不显著(P>.05;事后测试)。1年和2年后的平均骨丢失与植入物类型或部位、吸烟习惯或植入物手术类型没有显著相关性(P=.792)。然而,平均骨丢失量与假体类型显著相关,与螺钉固定假体相比,骨水泥假体的平均骨损失量更大。机械项圈的胸骨上位置(组织水平)与骨丢失无关,而将项圈放置在牙槽嵴下方会导致2年以上的骨丢失。在评估的因素中,1年和2年后的边缘骨丢失与假体类型和机械加工的项圈位置显著相关。
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来源期刊
CiteScore
2.90
自引率
6.20%
发文量
113
审稿时长
6-12 weeks
期刊介绍: The International Journal of Periodontics & Restorative Dentistry will publish manuscripts concerned with all aspects of clinical periodontology, restorative dentistry, and implantology. This includes pertinent research as well as clinical methodology (their interdependence and relationship should be addressed where applicable); proceedings of relevant symposia or conferences; and quality review papers. Original manuscripts are considered for publication on the condition that they have not been published or submitted for publication elsewhere.
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