China Journal of Oral and Maxillofacial Surgery ›› 2019, Vol. 17 ›› Issue (3): 230-234.doi: 10.19438/j.cjoms.2019.03.008

• Original Articles • Previous Articles     Next Articles

The effect of thickness of labial bone and angulation of mandibular anterior teeth on preoperative design of immediate dental implants

LI Jing-hua1, 2, JIANG Wen-jing1, WANG Yan-hui1, LI Xiao-jing1, BAI Na1   

  1. 1.Department of Stomatology, Affiliated Hospital of Qingdao University. Qingdao 266000;
    2. College of Stomatology, Qingdao University. Qingdao 266003, Shandong Province, China
  • Received:2018-11-30 Revised:2019-03-18 Online:2019-05-20 Published:2019-06-21

Abstract: PURPOSE: This study aimed to measure the thickness of labial bone and the angulation of mandibular anterior teeth using cone-beam CT (CBCT) for preoperative design of immediate dental implants. METHODS: CBCT images from 135 patients (67 males, 68 females) with complete mandibular permanent teeth were selected from Affiliated Hospital of Qingdao University. The thickness of labial bone at alveolar bone crest (P1), the middle point of root (P2), the apex of root (P3), and the angle between the long axis of lower anterior teeth and the alveolar bone were measured. SPSS 23.0 software package was used for statistical analysis. RESULTS: The average thickness of labial bone at alveolar bone crest of mandibular central incisor, lateral incisor and canine was(0.65±0.24)mm, (0.66±0.28)mm, (0.57±0.29)mm, respectively; the average thickness of labial bone at the middle point of root of mandibular central incisor, lateral incisor and canine was(0.58±0.35)mm, (0.47±0.23)mm, (0.58 ±0.30)mm, respectively; and the average thickness of labial bone at the apex of root of mandibular central incisor, lateral incisor and canine was (3.45±1.28)mm, (3.87±1.25)mm, (4.60±1.32)mm, respectively. The mean angles of the long axis of mandibular central incisor, lateral incisor, canine and alveolar bone were 5.43°±2.30°, 7.22°±3.12°, 6.28°±2.65°, respectively. There was no significant difference in individual measurements between both sides and genders. CONCLUSIONS: The thickness of the labial bone of the mandibular anterior teeth is thin, the angle of mandibular anterior tooth inclination is small, which provides a reference basis for immediate dental implant treatment plan in the mandibular anterior teeth.

Key words: Mandibular anterior tooth, Cone-beam CT, Alveolar bone, Immediate dental implant

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