Myotomy of the lateral pterygoid muscle and condylar cartilage growth.
Myotomy of the lateral pterygoid muscle and condylar cartilage growth.
复制标题
翼外肌肌切开术和髁软骨生长。
DOI：
10.1093/ejo/12.4.370
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发表时间：
1990
影响因子：
2.6
通讯作者：
Hinton,RJ
中科院分区：
文献类型：
--
作者：
Hinton,RJ
翼外肌活动对下颌骨髁软骨生长的影响仍存在争议。作为一个恰当的例子，最近两项涉及肌肉全切除（肌切除术）和肌切开术（肌切开术）的研究得出了相互矛盾的结论。在此报告的研究中发现，与假手术大鼠相比，翼外肌双侧被切断的年轻生长大鼠的有丝分裂活性和骨形成显着延迟。手术后 4 天，肌切开动物中髁突头软骨的形状和地形分布以及标记细胞的分布也发生了变化。手术后 14 天，下颌升支上的肌肉插入处出现了明显的吸收。然而，肌切开手术伴随着术后体重显着下降和切牙超萌出，表明喂养困难，从而使结果的解释变得复杂。
The influence of lateral pterygoid muscle activity on growth of the condylar cartilage of the mandible remains controversial. As a case in point, two recent studies involving total resection (myectomy) and sectioning (myotomy) of this muscle have come to contradictory conclusions. In the study reported here, it was found that young growing rats in which the lateral pterygoid muscle was bilaterally cut experienced significantly retarded mitotic activity and bone formation relative to their sham-operated counterparts. Changes in the shape and topographical distribution of cartilage over the condylar head, as well as the distribution of labelled cells, were also noted in myotomy animals at 4 days following surgery.Considerable resorption at the insertion of the muscle on the mandibular ramus was apparent at 14 days after surgery. However, the myotomy surgery was accompanied by a significant postoperative loss of body weight and incisal supra-eruption indicative of feeding difficulties, thereby complicating interpretation of the results.