CBCT effects of different abutment angles on alveolar bone changes in maxillary anterior teeth

doi:10.3969/j.issn.1674-8115.2021.03.009

Abstract

Abstract: Objective

·To compare the imaging differences of alveolar bone changes after using different angles of abutment implants in the maxillary anterior area.

Methods

·Forty patients of maxillary anterior area implant restoration at the Second Stomatological Disease Institution of Huangpu District in Shanghai from January 2017 to December 2018 were divided into 2 groups according to the different angle of abutment, with 20 cases in each group, which were treated with the 0° and 25° abutment, respectively. Cone beam computed tomography (CBCT) examination was performed immediately, 6 months, 12 months and 18 months after angular abutment restoration, and the differences of CBCT changes in the thickness and height of labial alveolar bone between the two groups at different periods was measured by self-control study and paired t test.

Results

·CBCT comparison of 0° and 25° groups at 6 months, 12 months and 18 months after restoration showed no significant difference in the thickness and height of alveolar bone in the two groups.

Conclusion

·Change of alveolar bone around the implant can be quantified by using CBCT image examination. When the base angle of the maxillary anterior tooth area is within 25°, the base angle has no significant effect on the change of alveolar bone.

Key words: cone beam computed tomography (CBCT), implant, angle abutment, alveolar bone

CLC Number:

R783.6

Jian-ming YUAN, Bin WEI, Wei-xing XU, Lei ZHANG. CBCT effects of different abutment angles on alveolar bone changes in maxillary anterior teeth[J]. JOURNAL OF SHANGHAI JIAOTONG UNIVERSITY (MEDICAL SCIENCE), 2021, 41(3): 339-343.

Figures/Tables 8

TrendMD

References 19

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Observation point	0°abutment group （N=20）	25°abutment group （N=20）	P value
Change value of labial alveolar bone at 0.5 mm of implant neck	0.27±0.09	0.31±0.11	0.141
Change value of labial alveolar bone at 2 mm of implant neck	0.29±0.08	0.31±0.08	0.159
Changes in alveolar crest height on the labial side of implant	0.24±0.09	0.22±0.07	0.260

Observation point	0°abutment group （N=20）	25°abutment group （N=20）	P value
Change value of labial alveolar bone at 0.5 mm of implant neck	0.27±0.09	0.31±0.11	0.141
Change value of labial alveolar bone at 2 mm of implant neck	0.29±0.08	0.31±0.08	0.159
Changes in alveolar crest height on the labial side of implant	0.24±0.09	0.22±0.07	0.260

Observation point	0° abutment group （N=20）	25° abutment group （N=20）	P value
Change value of labial alveolar bone at 0.5 mm of implant neck	0.45±0.17	0.43±0.15	0.358
Change value of labial alveolar bone at 2 mm of implant neck	0.43±0.13	0.44±0.14	0.412
Changes in alveolar crest height on the labial side of implant	0.39±0.12	0.38±0.16	0.392

Observation point	0° abutment group （N=20）	25° abutment group （N=20）	P value
Change value of labial alveolar bone at 0.5 mm of implant neck	0.45±0.17	0.43±0.15	0.358
Change value of labial alveolar bone at 2 mm of implant neck	0.43±0.13	0.44±0.14	0.412
Changes in alveolar crest height on the labial side of implant	0.39±0.12	0.38±0.16	0.392

Observation point	0° abutment group （N=20）	25° abutment group （N=20）	P value
Change value of labial alveolar bone at 0.5 mm of implant neck	0.51±0.21	0.55±0.19	0.269
Change value of labial alveolar bone at 2 mm of implant neck	0.52±0.26	0.56±0.20	0.293
Changes in alveolar crest height on the labial side of implant	0.51±0.14	0.53±0.13	0.366