de Queiroz Alexandra Mussolino, Rocha Cristiane Tomaz, da Silva Lea Assed Bezerra, Brentegani Luiz Guilherme, da Silva Raquel Assed Bezerra, de Rossi Andiara, Nelson-Filho Paulo
Department of Pediatric Clinic, Ribeirão Preto Dental School, USP - University of São Paulo, Ribeirão Preto, SP, Brazil.
Braz Dent J. 2012;23(6):764-7. doi: 10.1590/s0103-64402012000600023.
Eruption sequestrum is an uncommon disturbance in eruption and consists of small fragments of calcified tissue overlying the crowns of erupting permanent molar teeth, especially at the time of eruption of the mandibular first molars. This paper reports a case of unilateral eruption sequestrum in a 7-year-old Brazilian boy and describes its histopathological findings. A white small fragment, 0.5 cm in diameter, with hard consistency, irregular shape and located on the occlusal surface of the erupting mandibular left first molar was excised. Microscopic examination revealed large trabeculae with empty lacunae and a minimal amount of existing spongy bone consisting of acute inflammatory cells (neutrophils). Signs of necrosis were found on the periphery. The histological analysis was consistent with non-vital bone and the diagnosis of eruption sequestrum was established. Clinical and radiographic follow-up visits scheduled at short intervals and then every 6 months revealed normal postoperative conditions.
萌出性骨片是一种罕见的萌出障碍，由覆盖正在萌出的恒牙牙冠的钙化组织小碎片组成，尤其是在下颌第一磨牙萌出时。本文报告一例7岁巴西男孩单侧萌出性骨片病例，并描述其组织病理学 findings。切除了一个直径0.5 cm的白色小碎片，质地硬，形状不规则，位于正在萌出的下颌左第一磨牙的咬合面上。显微镜检查显示有大的骨小梁，有空的陷窝，以及少量由急性炎症细胞（中性粒细胞）组成的现存松质骨。在周边发现了坏死迹象。组织学分析与无活力骨一致，确诊为萌出性骨片。定期安排短期及之后每6个月的临床和影像学随访显示术后情况正常。
