Vale Francisco, Queiroga Joana, Pereira Flávia, Ribeiro Madalena, Marques Filipa, Travassos Raquel, Nunes Catarina, Paula Anabela Baptista, Francisco Inês
Institute of Orthodontics, Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal.
Institute of Integrated Clinical Practice, Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal.
Bioengineering (Basel). 2021 Nov 8;8(11):180. doi: 10.3390/bioengineering8110180.
(1) Background: Mandibular deficiency is one of the most common growth disorders of the facial skeleton. Recently, distraction osteogenesis has been suggested as the treatment of choice for overcoming the limitations of conventional orthognathic surgery; (2) Methods: A new custom-manufactured dental-anchored distractor was built and anchored in the first molar and lower canine. It consists of a stainless-steel disjunction screw, adapted and welded to the orthodontic bands through two 1.2 mm diameter connector bars with a universal silver-based and cadmium-free solder; (3) Results: The distractor described can be a useful tool to correct mandibular retrognathia and is better tolerated by patients, especially in severe cases; (4) Conclusions: The dental-anchored distractor increases the anterior mandibular bone segment without affecting the gonial angle or transverse angulation of the segments and avoids posterior mandibular rotation, overcoming the limitations of conventional surgical treatment.
(1) 背景：下颌骨发育不全是面部骨骼最常见的生长障碍之一。最近，牵张成骨术被认为是克服传统正颌外科手术局限性的首选治疗方法；(2) 方法：制造了一种新型定制牙科锚固牵张器，并将其锚固在第一磨牙和下颌尖牙上。它由一个不锈钢分离螺钉组成，通过两个直径为1.2毫米的连接杆，使用通用的无银无镉焊料适配并焊接到正畸带环上；(3) 结果：所述牵张器可以成为矫正下颌后缩的有用工具，并且患者耐受性更好，尤其是在严重病例中；(4) 结论：牙科锚固牵张器增加了下颌前部骨段，而不影响角部角度或各段的横向角度，并避免了下颌后部旋转，克服了传统手术治疗的局限性。
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