[严重骨骼III类病例的慢性牙关]。

Nihon Ago Kansetsu Gakkai Zasshi Pub Date : 1989-01-01
S Nakamura, T Iwata, K Tanida, K Nagahara, K Shirakawa, T Iizuka
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引用次数: 0

摘要

一般来说,以牙关为主诉的患者通常有急性症状,但少数患者有慢性牙关。我们研究了51例患者(平均年龄;18y 4n)骨骼严重III级(小于ANB小于等于O),需要手术治疗。根据首次就诊时最大开口时下颌头的运动情况将其分为三种类型。a类型;下颌头几乎不动。b型;它不会超出关节隆起。c型;它超越了关节隆起。将这些分类应用于51例患者的下颌头两侧,分为5型(AA型、AB型、BB型、BC型、CC型)。根据这五种类型对患者进行分析。所得结果如下:1)在这项研究中,73%的病例是女性。65%的男性和女性患有慢性牙关,但在日常生活中下颌关节没有主观症状。AA型占12%,AB型占6%,BB型占31%,BC型占16%。2) AA组和AB组的上后拮抗牙接触较少;尤其是在5点。所有CC型病例均可见与拮抗牙5接触。3)综上所述,唇腭裂患者的下颌头运动在最大开口处有特征性的限制,在咬合中心处的咬合接触应力点为后区。
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[Chronic trismus in the severe skeletal Class III cases].

In general, patients who have trismus as chief complaint often have acute symptoms, but limited number of these patients have chronic trismus. We studied 51 patients (mean age; 18y 4n) with severe skeletal class III (less than ANB less than or equal to O), who need surgical treatment. Three types were classified according to the movement of the mandibular head at the maximum mouth opening at their first visit. A-type; the mandibular head hardly move. B-type; it dose not move beyond articular eminence. C-type; it moves beyond articular eminence. These classifications were applied to the both sides of the mandibular head in the 51 patients to divide into 5 types (Type AA, Type AB, Type BB, Type BC, Type CC). Those patients were analyzed according to these five types. The results obtained were as follows; 1) Seventy-three percent of all the cases were female in this study. Sixty-five percent of both the sexes had chronic trismus without having subjective symptoms on the mandibular joints in their daily lives. Type AA, AB, BB, and BC accounted for 12%, 6%, 31%, and 16% respectively. 2) There were fewer contacts in the upper posterior antagonist teeth in AA and AB; particularly at 5. In all the cases of Type CC, contacts with the antagonist tooth 5 were seen. 3) As a conclusion, movement of the mandibular head in the patients with trismus are found to have a characteristic limitation at the maximum mouth opening and the stress points in the occlusal contacts at the centric occlusion to be the posterior area.

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