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Association between occlusal force distribution in implant overdenture prostheses and residual ridge resorption

机译:种植义齿修复中的咬合力分布与残余吸收之间的关系

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摘要

This study aimed to investigate residual ridge resorption (RRR) of anterior and posterior maxillary and mandibular edentulous ridges, inpatients treated with mandibular implant overdentures (IOD) and compare with conventional complete denture (CD) wearers, and to determine at each location, the association of RRR with the occlusal forces distribution and other patients' variables. The anterior and posterior RRR of IOD (six males, 17 females) and CD (12 males, 11 females) groups were determined using baseline and follow-up dental panaromic radiographs (DPT) (mean intervals 4 +/- 18years). The bone ratios were calculated using proportional area: anatomic to fixed reference areas and mean difference of ratios between the intervals determined RRR. The ridge locations included anterior and posterior maxillary and posterior mandibular arches. The T-Scan III digital occlusal system was used to record anterior and posterior percentage occlusal force (%OF) distributions. There were significant differences in anterior and posterior %OF between treatment groups. Two-way anova showed RRR was significant for arch locations (P=0005), treatment group (IOD versus CD) (P=0001), however, no significant interaction (P=0799). Multivariate regression analyses showed significant association between RRR and %OF at anterior maxilla (P=0000) and posterior mandible (P=0023) and for treatment groups at posterior maxilla (P=0033) and mandibular areas (P=0021). Resorption was observed in IOD compared to CD groups, with 85% chance of less resorption in former and 78% in the latter location. Depending on arch location, ridge resorption at various locations was associated with occlusal force distribution and/or treatment groups (implant prostheses or conventional complete dentures).
机译:这项研究的目的是调查上颌和后颌和下颌无牙颌脊的残留脊吸收(RRR),接受下颌种植义齿(IOD)治疗的住院患者并与常规全口义齿(CD)佩戴者进行比较,并确定每个位置的相关性与咬合力分布和其他患者变量的关系。使用基线和后续牙科全X线片(DPT)(平均间隔4 +/- 18年)确定了IOD(6名男性,17名女性)和CD(12名男性,11名女性)组的前后RRR。使用比例区域:解剖参考区域到固定参考区域以及确定的RRR间隔之间的比率的平均差来计算骨骼比率。脊的位置包括上,后上颌骨和后下颌弓。使用T-Scan III数字咬合系统记录前牙和后牙合力百分比(%OF)。治疗组之间的前,后%OF有显着差异。双向方差分析显示RRR在足弓位置(P = 0005),治疗组(IOD与CD)(P = 0001)显着(P = 00001),但无显着相互作用(P = 0799)。多元回归分析显示,上颌骨前部(P = 0000)和下颌骨(P = 0023)的RRR和%OF显着相关,上颌骨后部(P = 0033)和下颌骨区域的治疗组(P = 0021)的RRR和%OF密切相关。与CD组相比,在IOD中观察到了吸收,前者的吸收率降低了85%,后者的吸收率降低了78%。根据牙弓的位置,牙槽locations在各个位置的吸收与咬合力分布和/或治疗组(植入假体或常规全口义齿)有关。

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