牙周健康的上颌前牙唇侧嵴顶上牙龈的三维形态分析

doi:10.19723/j.issn.1671-167X.2021.05.030

Abstract

Abstract:

Objective: To measure the three-dimensional morphology of the labial supraosseous gingiva (SOG) and the thickness of related labial bone in maxillary anterior teeth of periodontally healthy Han nationality youth using soft tissue indirect imaging cone-beam computed tomography (CBCT). Methods: Twenty-five periodontally healthy subjects (11 males and 14 females) with 150 maxillary anterior teeth were involved in this study. A special impression with radiopaque material including the maxillary teeth was made, then a CBCT scan with the elastomeric matrix in position was taken for each subject. The imaging data were generated and transferred to a volumetric imaging software in which three-dimensional reconstruction was conducted and the image analyses were carried out. Measurements were made at the site of labial center of the maxillary anterior teeth. The height of the SOG, the distance between cemento-enamel junction (CEJ) and bone crest, the gingival thickness at the CEJ, and the thickness of bone 2 mm below the labial bone crest were measured and the correlation analysis between the parameters was made. All the data analyses were performed using SPSS 22.0. The data were analyzed with ANVOA and Pearson correlation tests with the significance level at α=0.05. Results: The mean SOG values were (3.49±0.70) mm, (3.48±0.81) mm, and (3.54±0.67) mm for central incisors, lateral incisors and canines, respectively. There were no statistically significant differences among the different sites (P>0.05). The mean gingival thickness values were (1.45±0.23) mm, (1.13±0.24) mm, (1.14±0.22) mm for central incisors, lateral incisors and canines, respectively. The gingival thickness of the central incisors was the largest among the maxillary anterior teeth with statistically significant difference (P<0.05). No correlation was found between the SOG and gingival thickness among the maxillary anterior teeth (P>0.05). Conclusion: The gingival thickness of central incisors was the largest and the supraosseous gingival height had no correlation with gingival thickness among the periodontally healthy maxillary anterior teeth.

Key words: Cone-beam computed tomography, Gingiva, Imaging, three-dimensional

CLC Number:

R783

Gang YANG,Wen-jie HU,Jie CAO,Deng-gao LIU. Three-dimensional morphology analysis of the supraosseous gingival profile of periodontally healthy maxillary anterior teeth[J].Journal of Peking University (Health Sciences), 2021, 53(5): 990-994.

Figures/Tables 3

Figure 1

Table 1

Measurements of gingival thickness, the distance between CEJ and bone crest, supraosseous gingival height in the maxillary anterior teeth by indirect soft tissue imaging CBCT"

Teeth	CEJ-BC/mm, $x ?$ ±s	SOG/mm, $x ?$ ±s	GT/mm, $x ?$ ±s	BT/mm, $x ?$ ±s
Central incisor	1.70±0.43^*	3.54±0.67	1.44±0.23^*	1.19±0.25
Lateral incisor	1.95±0.50	3.48±0.81	1.13±0.24	1.05±0.34^*
Canine	1.88±0.58	3.49±0.71	1.14±0.22	1.22±0.42

Table 1

Table 2

Measurements of gingival thickness, the distance between CEJ and bone crest, supraosseous gingival height in the maxillary anterior teeth between different genders"

Teeth	Gender	CEJ-BC/mm, $x ?$ ±s	SOG/mm, $x ?$ ±s	GT/mm, $x ?$ ±s	BT/mm, $x ?$ ±s
Central incisor	Male	1.69±0.45	3.54±0.59	1.43±0.27	1.19±0.28
	Female	1.70±0.42	3.45±0.63	1.47±0.20	1.19±0.23
Lateral incisor	Male	1.94±0.60	3.54±0.78	1.16±0.31	1.05±0.41
	Female	1.95±0.45	3.56±0.75	1.11±0.19	1.05±0.29
Canine	Male	1.73±0.40	3.59±0.57	1.23±0.23^*	1.32±0.52
	Female	1.98±0.65	3.43±0.76	1.09±0.20	1.14±0.32

Table 2

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Three-dimensional morphology analysis of the supraosseous gingival profile of periodontally healthy maxillary anterior teeth

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