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正畸致牙根吸收的相关信号通路研究进展
口腔正畸治疗导致的颌骨特发性髁突吸收尚属少见[1],而正畸治疗相关的牙根吸收(root resorption,RR)则较常见,治疗前后的发生率分别为15%、73%[2],正畸力导致的RR (root resorption attributed to orthodontic force,RRAOF)多表现为根尖外吸收(external apical root resorption,EARR).RR病因复杂,其中遗传因素起主要作用,达64%[3-5].早期对RR的遗传易感性研究仅局限在表现型上的描述和推断,并未深入到分子水平.
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基质金属蛋白酶在正畸源性牙根吸收中的作用
基质金属蛋白酶是细胞外基质降解的关键酶,参与正畸源性牙根吸收过程.近几年来,对基质金属蛋白酶在牙根吸收过程中的研究逐渐增加.但是酶的确切来源,在牙根吸收中的具体作用,以及它们的调节因素等方面还有许多不了解之处,有待于今后的进一步的研究.本文对正畸源性牙根吸收过程与基质金属蛋白酶的研究结果进行综述.
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牙根外吸收四例病例分析
牙根外吸收是发生在有牙周附着的牙根外表面硬组织的病理性吸收,由于临床症状不典型、临床检查手段局限,病变早期常难以发现,以致漏诊、误诊,延误了治疗时机.现将4例典型的牙根外吸收病例报告、分析如下,供同行借鉴,共同提高诊治水平.
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This review is aimed at providing, at the cellular level, a concise and complete overview of the important knowledge on the mechanism of orthodontic tooth movement to orthodontists and postgraduates who are involved or interested in basic research. The construction of this article was oriented to the following key questions: Where an osteoclast starts to its first resorption site? When the cascade of a resorption cycle starts? What are the factors involved in bone remodeling and how they orchestrate? What happens before and after the formation of a resorption pit? Major findings in these aspects were summarized and discussed. In addition, related biological phenomenon such as orthodontically induced root resorption was intensively reviewed. By means of an updated and systematic review, the author intended to introduce more biological evidence to orthodontic intervention and to encourage evidence-based treatment in daily orthodontic practice.