Marginal bone loss around implants with platform-switched Morse-cone connection: a radiographic cross-sectional study
Marginal bone loss around implants with platform-switched Morse-cone connection: a radiographic cross-sectional study
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DOI：
10.1111/clr.12924
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发表时间：
2017-09-01
影响因子：
4.3
通讯作者：
Piattelli, Adriano
中科院分区：
文献类型：
--
作者：
Degidi, Marco;Daprile, Giuseppe;Piattelli, Adriano
ObjectivesThe aims of the present cross-sectional study is to evaluate the bone remodeling around Morse-cone implants placed subcrestally 1year after loading and the prevalence of bone loss >0.5mm after at least 3years of loading.Material and methodsSubjects who encountered a radiographic check in 2013 with implants that had been in function for at least 3years were considered for inclusion.研究人群包括145名受试者，共植入523个种植体。在插入时，根据临床测量，将所有种植体放置在1 - 3 mm的牙槽嵴下。检查了基线时（即负荷后1年（T0））和2013年随访访视（T1）时拍摄的X线片。种植体的边缘和边缘骨水平之间的距离，在近中和远中方面的每个种植体被确定和平均骨losscalculated.ResultsIn总样本，平均骨丢失发生在基线和2013年检查之间为0.420.77 mm;在T1 424种植体边缘（78）或以上（346）的边缘骨水平。另一方面，99个种植体的边缘位于骨嵴上方。51个种植体在T1出现骨嵴上方边缘，并且在T0和T1之间至少丢失0.5mm，被认为是失败者：10个种植体丢失0.5mm，11个丢失0.6 - 1 mm，16个丢失1.1 - 2 mm，14个丢失超过2 mm的骨。在受试者的基础上，34名受试者（A组）共200个种植部位显示失败者种植体，而111名受试者（B组）共323个种植体显示非失败者种植体。结果表明，在绝大多数病例中，（89.9%）在负重后1年仍能保持骨嵴与边缘水平或高于边缘。至少3年随访后，种植体水平和患者水平的丢失部位（骨丢失>0.5mm）发生率分别为9.7%和23.5%。
ObjectivesThe aims of the present cross-sectional study are to evaluate the bone remodeling around Morse-cone implants placed subcrestally 1year after loading and the prevalence of bone loss >0.5mm after at least 3years of loading.Material and methodsSubjects who underwent a radiographic check in 2013 with implants that had been in function for at least 3years were considered for inclusion. The study population comprised of 145 subjects with a total of 523 implants. At the moment of insertion, all the implants were placed subcrestally from 1 to 3mm as clinically measured. Radiographs taken at baseline, that is 1year after loading (T0), and at the follow-up visit in 2013 (T1) were examined. The distance between the rim of the implant and the marginal bone level at mesial and distal aspects of each implant was determined and the mean bone loss calculated.ResultsIn the total sample, the mean bone loss occurred between baseline and 2013 examination was 0.420.77mm; at T1 424 implants presented the marginal bone level at the implant rim (78) or above it (346). On the other hand, 99 implants presented the rim above the bone crest. Fifty-one implants that at T1 presented the rim above the bone crest, and that between T0 and T1 had lost at least 0.5mm, were considered losers: 10 implants lost up to 0.5mm, 11 lost from 0.6 to 1mm, 16 lost from 1.1 to 2mm, and 14 lost more than 2mm of bone. On a subject basis, 34 subjects (group A) with a total of 200 implant sites presented loser implants, while 111 subjects (group B) with 323 implants displayed non-loser implants.ConclusionsWithin the limits of a cross-sectional study, the results show that Morse-cone implants placed subcrestally in the vast majority of cases (89.9%) are able to maintain the bone crest at level of the rim or above it 1year after loading. The incidence of loser sites (bone loss >0.5mm) after at least 3years of follow-up is 9.7% at implant level and 23.5% at patient level.