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上颌中切牙因外伤或慢性牙髓炎常导致牙髓坏死、牙质变色.以往多用光敏固化疗法贴牙面或用桩冠修复.笔者积临床经验,发明了一种简便易行的新方法,现介绍如下.1 适应症牙冠完整或大部份完整,牙根无病变,牙髓坏死后变黑的上颌中切牙,经根管治疗后以备修复.2 修复方法首先于牙冠的唇面均匀磨去一层,厚度约2mm,然后用金刚砂倒锥形车针在牙冠唇面备好四个小洞,洞底要略大于洞口.另备一形态、厚度适宜的成品塑胶牙片,最后用自凝牙粉调和好后填满四个小洞,并于牙冠唇面涂一薄层,再将成品牙片贴上,同时雕塑好外形,待自凝塑胶固化后即告完成.3 效果评价笔者用此法修复数例,随访四年,疗效满意.此法操作简便,所用材料不多,门诊一次完成.比起光敏固化法或桩冠修复,都要省时省力,经济实用.若牙齿变黑的程度较重,则可多磨除唇面,以便给成品牙片留出足够的厚度,以防黑色透过牙片而显现出来.备洞时也可钻穿牙冠.但于舌面要留有倒锥形,以利固位.4 典型病例姜某,男,45岁,该患上前方牙11因外伤导致牙髓坏死,现牙冠黑得较重,因牙根周无病变,牙齿牢固,不忍心拔除,笔者采用此种修复方法效果满意,至今四年余完好无损.
The maxillary central incisor often leads to pulp necrosis and dentin discoloration due to trauma or chronic pulpitis .In the past, the use of light-sensitive solidification with dental crown or crown restoration .I author clinical experience, invented a new and easy method , Are introduced as follows.1 indications crown complete or most complete, no lesions, dental pulp necrosis of the maxillary central incisors after root canal treatment to prepare for repair.2 repair method first in the crown The lips are evenly worn to a thickness of about 2mm, and then with diamond back cone taper prepared in the crown lip four holes, the hole is slightly larger than the hole. Another form of a suitable thickness of the finished plastic tooth , And finally with self-condensing toothpaste reconcile filling four small holes, and the lip in the crown coated with a thin layer, then the finished tooth paste, while sculptures good shape, to be completed after the curing plastic solidification. 3 effect evaluation I use this method to repair a few cases, follow-up of four years, the curative effect is satisfactory.This method is easy to operate, the material used is small, outpatient completed at once.Compared with the photosensitive curing method or post crown repair, should be time-saving and labor-saving, economical and practical If the degree of darkening of teeth heavier, you can remove more than lip surface, in order to set aside the finished tooth Enough thickness to prevent the black through the teeth and appear.Pore hole can also be drilled through the crown.However, the tongue should be left inverted cone, to facilitate retention.4 Typical cases Kang, male, 45 years old , Which suffered from anterior teeth 11 due to trauma caused by pulp necrosis, the crown is black heavier, no lesions due to root, solid teeth, could not be removed, I use this method of repair satisfactory results, so far more than four years intact .