约旦成年人群中桩核冠修复后的影像学评估。

Radiographic assessment of post-retained crowns in an adult Jordanian population.

作者信息

Al-Hamad Khaled Q, Al-Omari Mohamed, Al-Wahadni Ahed, Darwazeh Azmi

机构信息

Department of Restorative Dentistry of the Faculty of Dentistry at the Jordan University of Science & Technology in Irbid, Jordan.

出版信息

J Contemp Dent Pract. 2006 Sep 1;7(4):29-36.

PMID:16957788

Abstract

AIM

The objective of this study was to radiographically assess and compare the quality of post-retained crowns fabricated at the Dental Health Centre of the Jordan University of Science & Technology (JUST).

METHODS AND MATERIALS

Study data were collected in 2002 from existing dental records for all patients receiving treatment with post-retained crowns between October, 1997 and June, 1999. The posts were assessed radiographically to evaluate various aspects of the quality of post-retained crowns. All 129 posts were fabricated in the dental school.

RESULTS

The most-frequently restored teeth were the maxillary incisors (38.8%). Sixty-two percent of the posts were tapered, while 38% were parallel-sided. The mean length of the posts was 0.95 mm (SD 0.41) with a range between 0.22-2.85 mm. Caries was diagnosed radiographically in 10.8% of cases with lesions located on root surfaces in 64.3% of them, while 35.7% of lesions were within the root canal. Three posts (2.3%) were deviated from the line of the root canal in the mesio-distal plane. No evidence of root filling was found in 2.3% of the cases. In the remainder of teeth 15.5% had gutta percha extended to the radiographic apex of the tooth, while 59.7% fell 0.5-1 mm short of the radiographic apex. Gutta-percha was extruded beyond the apex in 22.5% of the teeth. Space between the end of the post and the root filling was found in 22.2%. The percentage of canals with apparently completely healthy periapical tissue was 51.2%. In the rest of the cases 34.8% had areas of radiolucency at or near the root apices and 14% demonstrated widening of the periodontal space around the root apex. Root resection had been completed in 2.3% cases. Signs of external resorption were apparent in one case (0.78%).

CONCLUSION

The standards of the treatment of the endodontically treated teeth made at the dental hospital were satisfactory but could be improved by a controlled academic supervisory environment and a strict scientific approach to fixed prosthodontics within the dental school.

摘要

目的

本研究的目的是通过影像学评估和比较约旦科技大学牙科学院口腔健康中心制作的桩核冠的质量。

方法和材料

研究数据于2002年从1997年10月至1999年6月期间接受桩核冠治疗的所有患者的现有牙科记录中收集。通过影像学对桩进行评估，以评价桩核冠质量的各个方面。所有129个桩均在牙科学院制作。

结果

修复最频繁的牙齿是上颌切牙（38.8%）。62%的桩为锥形，38%为平行边。桩的平均长度为0.95毫米（标准差0.41），范围在0.22 - 2.85毫米之间。影像学诊断龋齿的病例占10.8%，其中64.3%的病变位于牙根表面，35.7%的病变位于根管内。3个桩（2.3%）在近远中平面偏离根管方向。2.3%的病例未发现根管充填的迹象。在其余牙齿中。15.5%的牙胶尖延伸至牙齿的影像学根尖，59.7%的牙胶尖距离影像学根尖0.5 - 1毫米。22.5%的牙齿牙胶尖超出根尖。22.2%的病例发现桩末端与根管充填物之间存在间隙。根尖周组织明显完全健康的根管比例为51.2%。在其余病例中，34.8%在根尖或根尖附近有透射区，14%显示根尖周围牙周间隙增宽。2.3%的病例完成了牙根切除术。1例（0.78%）出现外吸收迹象。