Angulations of Anterior Teeth With Reference to the Alveolar Bone Measured by CBCT in a Chinese Population

Zhang, Shanchuan; Shi, Xiaowei; Liu, Hongchen

doi:10.1097/id.0000000000000291

Cited by 18 publications

(24 citation statements)

References 17 publications

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“…The mean palatal bone thicknesses at the apical level were 5.06 and 5.68 mm for the central incisors and 5.68 and 5.67 mm for the lateral incisors on the right and left sides of the maxilla, respectively. These values are close to previous reports . Zhang et al found that the palatal bone thickness at the apical level was 6.19 mm for central incisors and 4.12 mm for lateral incisors in a Han population .…”

Section: Discussionsupporting

confidence: 90%

“…These values are close to previous reports . Zhang et al found that the palatal bone thickness at the apical level was 6.19 mm for central incisors and 4.12 mm for lateral incisors in a Han population . The slice selected for the measurement could be the reason for this difference—the central slice of the alveolar bone was used in the present study, which is close to the clinical situation when the implant is placed at the middle of the mesial‐distal edentulous gap, while Zhang et al measured the central slice of the respective tooth.…”

Section: Discussionsupporting

confidence: 87%

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Clinical assessment of the palatal alveolar bone thickness and its correlation with the buccolingual angulation of maxillary incisors for immediate implant placement

Thanh

Shen

Fuh

et al. 2019

Clin Implant Dent Rel Res

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Background Clinicians needed to be aware of the thinness of the palatal bone plate when identifying severe protrusion of maxillary incisors, as this could result in perforation of the palatal bone plate during surgical procedures associated with immediate maxillary implant placement. Purpose This study evaluated the thickness of the palatal bone plate, the buccolingual angulation of maxillary incisors, and the correlation between these two parameters in relation to immediate implant placement. Materials and Methods Cone‐beam computed tomography images of 37 Asian patients (20‐60 years old) with no evidence of dental treatment in the maxillary incisor area were collected and classified into groups based on sex and incisor locations. Sagittal slices were used to measure the palatal bone plate thickness at the cervical, middle, and apical levels, and the buccolingual angulation of each tooth was also measured. The intraclass correlation, Shapiro‐Wilk test, descriptive analysis, Student's t‐test, and Pearson correlation were used for statistical and correlation analyses, with P < .05 applied as the criterion for statistical significance. Results At the apical level of all inspected teeth and the middle level of lateral incisors, the palatal bone was significantly thicker in males than in females. The inclination of the maxillary lateral incisor showed a moderate negative linear correlation with the palatal bone thickness at the apical level (R = −0.517 and R = −0.579 for males and females, respectively). Conclusions In an Asian population, an increased buccolingual angulation of the maxillary lateral incisors was correlated with a thinner palatal bone plate at the apical level.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 87%

Clinical assessment of the palatal alveolar bone thickness and its correlation with the buccolingual angulation of maxillary incisors for immediate implant placement

Thanh

Shen

Fuh

et al. 2019

Clin Implant Dent Rel Res

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“…Several studies have reported the angulation of the alveolar bone axis and the long axis of the whole tooth for the anterior maxillary teeth. This information is beneficial for guiding orthodontic therapies 151617. Nonetheless, some authors have used the SRP classification within the alveolar bone housing14 to evaluate bone quality as a guideline for assessing the challenges of implant placement or the need for adjunctive soft tissue and/or hard tissue augmentation during treatment planning 181920.…”

Section: Introductionmentioning

confidence: 99%

Influence of the anterior arch shape and root position on root angulation in the maxillary esthetic area

2019

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Purpose This study was conducted to characterize the relationship of the angulation between the tooth root axis and alveolar bone axis with anterior alveolar (AA) arch forms and sagittal root position (SRP) in the anterior esthetic region using cone-beam computed tomography (CBCT) images. Materials and Methods CBCT images that met the inclusion and exclusion criteria were categorized using a recent classification of AA arch forms and a SRP classification. Then, the angulation of the root axis and the alveolar bone axis was measured using mid-sagittal CBCT images of each tooth. The relationships of the angulation with each AA arch form and SRP classification were evaluated using 1-way analysis of variance and a linear regression model. Results Ninety-eight CBCT images were included in this study. SRP had a greater influence than the AA arch form on the angulation of the root axis and the alveolar bone axis ( P <0.05). However, the combination of AA arch form and SRP was more predictive of the angulation of the root axis and the alveolar bone axis than either parameter individually. Conclusion The angulation of the root axis and alveolar bone axis demonstrated a relationship with the AA arch form and SRP in teeth in the anterior esthetic region. The influence of SRP was greater, but the combination of both parameters was more predictive of root-to-bone angulation than either parameter individually, implying that clinicians should account for both the AA arch form and SRP when planning implant placement procedures in this region.

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“…According to the geographical setting of the study sample, 15 studies were made in populations from Asia, ve from America, six from Europe and three from Africa. Sixteen studies [12-17, 19, 23, 24, 38-44] analyzed FAB thickness considering FBC as the anatomical reference point, while 13 studies [20,22,25,[45][46][47][48][49][50][51][52][53][54] used CEJ. Fifteen studies analyzed the CEJ-FBC distance; ten studies evaluated the prevalence of FAB thickness < 1 mm, and only 7 analyzed the presence of dehiscence or fenestration.…”

Section: Study Characteristicsmentioning

confidence: 99%

Facial Alveolar Bone Thickness and Modifying Factors of Anterior Maxillary Teeth: A Systematic Review and Meta-Analysis of Cone-Beam Computed Tomography Studies

Rojo-Sanchis

Soto-Peñaloza

Peñarrocha‐Oltra

et al. 2020

Preprint

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Background: Understanding the anatomy of the facial alveolar bone (FAB), provides a prognostic tool for estimating the degree of dimensional ridge alterations after tooth extraction. This study aimed to systematically review the FAB thickness of anterior maxillary teeth measured by CBCT scans. A secondary objective was to assess the facial distance from the cementoenamel junction (CEJ) to the bone crest.Methods: An electronic search was made of Medline, Embase, Web of Science, Cochrane Library and Google Scholar up to December 2019. Studies that analyze and quantitatively compare FAB thickness at maxillary teeth by CBCT scans were included. The methodological quality of the included studies was appraised using the ROBINS-I tool from the Cochrane Collaboration. A meta-analysis of single means, subgroup analysis and meta-regression of covariates were conducted.Results: Twenty-nine studies, including 17,321 teeth, were selected. Seventeen studies considered the facial bone crest, and 12 the CEJ as a reference point for their measurements. Mean FAB thickness was ≤ 1 mm in maxillary incisors and canines (0.75-1.05 mm) and 1-2 mm in premolars. Patients over 50 years of age and females exhibited a thinner FAB at some apico-coronal locations of maxillary incisors and canines. Thicker gingival phenotypes were associated with a thicker FAB in maxillary incisors and canines. The geographical setting proved to be an effect modifier that could explain up to 87% of the heterogeneity in FAB thickness, being Asian populations that showed the lowest FAB thickness values. The CEJ-bone crest distance was 2-2.5 mm in all teeth analyzed. Population over 50 years of age exhibited greater CEJ-bone crest distances, and males also showed a trend for greater distance. The prevalence of bone dehiscences at maxillary incisors and canines was 12.3-20.1%; while the prevalence of fenestrations was between 6.4% and 23.8%.Conclusions: Facial alveolar bone is thin, heterogeneous in width along its apico-coronal dimensions, and increases in thickness in maxillary premolars. The prevalence of < 1 mm FAB thickness was 69.9% in central incisors, 64.5% in lateral incisors, 55% in canines and 40.4% at first premolars. The CEJ-bone crest distance presented homogeneous and similar values in all teeth analyzed.

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Angulations of Anterior Teeth With Reference to the Alveolar Bone Measured by CBCT in a Chinese Population

Abstract: The application of CBCT is reliable for a complete calculation of angulations and thicknesses in a Chinese Han population. As a result, adequate planning combined with image examination preoperatively would contribute to a favorable outcome.

Cited by 18 publications

References 17 publications

Clinical assessment of the palatal alveolar bone thickness and its correlation with the buccolingual angulation of maxillary incisors for immediate implant placement

Clinical assessment of the palatal alveolar bone thickness and its correlation with the buccolingual angulation of maxillary incisors for immediate implant placement

Influence of the anterior arch shape and root position on root angulation in the maxillary esthetic area

Facial Alveolar Bone Thickness and Modifying Factors of Anterior Maxillary Teeth: A Systematic Review and Meta-Analysis of Cone-Beam Computed Tomography Studies

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