Labial Cortical Bone Thickness in the Anterior Region: A Systematic Review

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Marziyeh Shafizadeh ◽  
Azita Tehranchi ◽  
Saeed Reza Motamedian
Keyword(s):  
Cortical Bone ◽  
English Studies ◽  
Bone Thickness ◽  
Anterior Maxilla ◽  
Maxillary Central Incisor ◽  
Cortical Bone Thickness ◽  
Implant Placement ◽  
Anterior Teeth ◽  
Dental Procedures ◽  
Wide Range

Context: The labial cortical bone may influence the outcomes of several treatments including fresh socket implant placement and orthodontic treatments. A thin labial plate may contribute to increased risks of periodontal consequences during dental procedures. Acknowledgment of the average values may guide clinicians to take particular considerations in making treatment decisions. Therefore, this study aimed to systematically review the labial cortical bone thickness (LBT) in the anterior maxillary teeth. Objective: The primary purpose of this study was to review the LBT in the anterior maxillary teeth to present the range of average LBT in the global population. Evidence Acquisition: An electronic search was conducted in PubMed, Embase, ProQuest, Web of Science, and Scopus databases. English studies that measured the LBT in the maxillary anterior teeth using CT or CBCT scans were deemed relevant. Only studies performed on adult patients with a lack of periodontal disease were included. Results: A total of 49 studies were included. Mean LBT ranged 0.13 - 3.08, 0.29 - 4.2, and 0.36 - 4.5 mm in maxillary central incisor, lateral incisor, and canine, respectively. Expectedly, LBT was affected by the vertical level of the measurement point and increased toward the apex. In total, the LBT in the anterior maxilla ranged from 0.13 to 4.5 mm. In comparison with other populations, a relatively thin labial plate was evidenced in the Iranian populations. Conclusions: This study showed a wide range of LBT in the esthetic zone. A thin plate in the esthetic area necessitates caution in orthodontic treatments, particularly when tooth expansion or proclination is required. Additionally, wide ranges of reported values which are mostly under 2 mm, highlight the importance of CBCT acquisition before any fresh socket implant placement.

scholarly journals Relationship between Cortical Bone Thickness and Cancellous Bone Density at Dental Implant Sites in the Jawbone

Diagnostics ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 710
Author(s):  
Shiuan-Hui Wang ◽  
Yen-Wen Shen ◽  
Lih-Jyh Fuh ◽  
Shin-Lei Peng ◽  
Ming-Tzu Tsai ◽  
...  
Keyword(s):  
Bone Density ◽  
Cortical Bone ◽  
Dental Implant ◽  
Cancellous Bone ◽  
Bone Thickness ◽  
Anterior Maxilla ◽  
Cortical Bone Thickness ◽  
Posterior Maxilla ◽  
Dental Implant Surgery ◽  
Anterior Mandible

Dental implant surgery is a common treatment for missing teeth. Its survival rate is considerably affected by host bone quality and quantity, which is often assessed prior to surgery through dental cone-beam computed tomography (CBCT). Dental CBCT was used in this study to evaluate dental implant sites for (1) differences in and (2) correlations between cancellous bone density and cortical bone thickness among four regions of the jawbone. In total, 315 dental implant sites (39 in the anterior mandible, 42 in the anterior maxilla, 107 in the posterior mandible, and 127 in the posterior maxilla) were identified in dental CBCT images from 128 patients. All CBCT images were loaded into Mimics 15.0 to measure cancellous bone density (unit: grayscale value (GV) and cortical bone thickness (unit: mm)). Differences among the four regions of the jawbone were evaluated using one-way analysis of variance and Scheffe’s posttest. Pearson coefficients for correlations between cancellous bone density and cortical bone thickness were also calculated for the four jawbone regions. The results revealed that the mean cancellous bone density was highest in the anterior mandible (722 ± 227 GV), followed by the anterior maxilla (542 ± 208 GV), posterior mandible (535 ± 206 GV), and posterior maxilla (388 ± 206 GV). Cortical bone thickness was highest in the posterior mandible (1.15 ± 0.42 mm), followed by the anterior mandible (1.01 ± 0.32 mm), anterior maxilla (0.89 ± 0.26 mm), and posterior maxilla (0.72 ± 0.19 mm). In the whole jawbone, a weak correlation (r = 0.133, p = 0.041) was detected between cancellous bone density and cortical bone thickness. Furthermore, except for the anterior maxilla (r = 0.306, p = 0.048), no correlation between the two bone parameters was observed (all p > 0.05). Cancellous bone density and cortical bone thickness varies by implant site in the four regions of the jawbone. The cortical and cancellous bone of a jawbone dental implant site should be evaluated individually before surgery.

scholarly journals Comparative Evaluation of Cortical Bone Anatomy of Mandibular Buccal Shelf for Mini Implant Placement in Different Facial Divergence: A Cone Beam Computed Tomography Study

2020 ◽  
Vol 54 (4) ◽  
pp. 325-331
Author(s):  
Kalyani Trivedi ◽  
Bharvi K Jani ◽  
Sagar Hirani ◽  
Mansi V Radia
Keyword(s):  
Computed Tomography ◽  
Cortical Bone ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Bone Surface ◽  
Bone Thickness ◽  
Second Molar ◽  
Cortical Bone Thickness ◽  
Implant Placement ◽  
Alveolar Crest

Aim: The purpose of this study was to use measurements from cone beam computed tomography scans to quantify the cortical bone thickness of mandibular buccal shelf region and preferable site for buccal shelf implant placement in 10 hyperdivergent and 10 hypodivergent patients. Method: 20 cone beam computed tomographies were equally divided based on divergence. 6 sites were examined: mesial of first molar (6M), middle of first molar (6Mi), interdental between the first and second molar (Id), mesial of second molar (7M), middle of second molar (7Mi), and distal of second molar (7D). The study quantified the mandibular buccal shelf relative to its angle of slope, the cortical bone thickness measured perpendicular to the bone surface, the amount of cortical bone 30° angle to the bone surface. The cortical bone thickness was measured perpendicular and at a 30° angle at 3, 5, and 7 mm from the alveolar crest. Result: Significant change is seen at the buccal shelf slope at 6M ( P = .001) and further increase in this angle till 7D ( P = .003). Mean amount of cortical bone for hyperdivergent group at 7D is 4.77 ± 0.68 mm and for hypodivergent group is 3.86 ± 0.70 mm. Statistically significant differences were noted at insertion site at 90° and 30° for both groups at 3, 5, and 7 mm from the alveolar crest. Conclusion: Preferable site for buccal shelf implant placement is distal to the mandibular second molar. The maximum amount of cortical bone is found distal to the second molar 7 mm vertically from alveolar crest when the buccal shelf implant is placed at 30° angulation for hyperdivergent group.

Cortical bone thickness at common miniscrew implant placement sites

2011 ◽  
Vol 139 (4) ◽  
pp. 495-503 ◽  
Author(s):  
David Farnsworth ◽  
P. Emile Rossouw ◽  
Richard F. Ceen ◽  
Peter H. Buschang
Keyword(s):  
Cortical Bone ◽  
Bone Thickness ◽  
Cortical Bone Thickness ◽  
Implant Placement ◽  
Miniscrew Implant

scholarly journals Optimal implantation site of orthodontic micro-screws in the mandibular anterior region based on CBCT

2019 ◽  
Author(s):  
Yannan Wang ◽  
Shi Quan ◽  
Juan Xu ◽  
Feng Wang
Keyword(s):  
Cortical Bone ◽  
Alveolar Bone ◽  
Comprehensive Evaluation ◽  
Lateral Incisor ◽  
Implantation Site ◽  
Alveolar Ridge ◽  
Bone Thickness ◽  
Cortical Bone Thickness ◽  
Ridge Crest ◽  
Anterior Teeth

Abstract Background To determine the optimal implantation site of orthodontic micro-screws based on cone beam computed tomography (CBCT) analysis in the mandibular anterior tooth region, provide a theoretical basis for orthodontic implant placement and improve post-implantation stability. Methods Forty patients who underwent CBCT scanning were selected for this study. CBCT scanning was applied to measure the interradicular distance, buccolingual dimension, labial cortical bone thickness and lingual cortical bone thickness between mandibular anterior teeth at planes 2 mm, 4 mm, 6 mm and 8 mm below the alveolar ridge crest. The data were measured and collected to obtain a comprehensive evaluation of the specific site conditions of the alveolar bone. Results The interradicular distance, buccolingual dimension and labial cortical bone thickness between the mandibular anterior teeth were positively correlated with the distance below the alveolar ridge crest (below 8 mm). The interradicular distance, buccolingual dimension, labial cortical bone thickness and lingual cortical bone thickness were all greater than those in other areas between the lateral incisor root and canine incisor root 4 mm, 6 mm, and 8 mm below the alveolar ridge crest. Conclusion The area between the lateral incisor root and the canine incisor root in planes 4 mm, 6 mm, and 8 mm from the alveolar ridge crest can be used as safe sites for implantation, while 8 mm below the alveolar ridge crest can be the optimal implantation site. An optimal implantation site can be 8 mm below the alveolar ridge crest between the lateral incisor root and the canine incisor root.

scholarly journals Influence of bone condition on implant placement accuracy with computer-guided surgery

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Ramadhan Hardani Putra ◽  
Nobuhiro Yoda ◽  
Masahiro Iikubo ◽  
Yoshihiro Kataoka ◽  
Kensuke Yamauchi ◽  
...  
Keyword(s):  
Bone Density ◽  
Cortical Bone ◽  
Simulation Software ◽  
Bone Thickness ◽  
Cortical Bone Thickness ◽  
Guided Surgery ◽  
Implant Placement ◽  
Bone Condition ◽  
The Impact ◽  
Dental Cast

Abstract Background The impact of the jaw bone condition, such as bone quantity and quality in the implant placement site, affecting the accuracy of implant placement with computer-guided surgery (CGS) remains unclear. Therefore, this study aimed to evaluate the influence of bone condition, i.e., bone density, bone width, and cortical bone thickness at the crestal bone on the accuracy of implant placement with CGS. Methods A total of 47 tissue-level implants from 25 patients placed in the posterior mandibular area were studied. Implant placement position was planned on the simulation software, Simplant® Pro 16, by superimposing preoperative computed tomography images with stereolithography data of diagnostic wax-up on the dental cast. Implant placement surgery was performed using the surgical guide plate to reflect the planned implant position. The post-surgical dental cast was scanned to determine the position of the placed implant. Linear and vertical deviations between planned and placed implants were calculated. Deviations at both platform and apical of the implant were measured in the bucco-lingual and mesio-distal directions. Intra- and inter-observer variabilities were calculated to ensure measurement reliability. Multiple linear regression analysis was employed to investigate the effect of the bone condition, such as density, width, and cortical bone thickness at the implant site area, on the accuracy of implant placement (α = 0.05). Result Intra- and inter-observer variabilities of these measurements showed excellent agreement (intra class correlation coefficient ± 0.90). Bone condition significantly influenced the accuracy of implant placement using CGS (p < 0.05). Both bone density and width were found to be significant predictors. Conclusions Low bone density and/or narrow bucco-lingual width near the alveolar bone crest in the implant placement site might be a risk factor influencing the accuracy of implant placement with CGS.

Evaluation of cortical bone thickness and root proximity at maxillary interradicular sites for mini-implant placement

2011 ◽  
Vol 24 ◽  
pp. 1-7 ◽  
Author(s):  
Kosaku Sawada ◽  
Ken Nakahara ◽  
Satoru Matsunaga ◽  
Shinichi Abe ◽  
Yoshinobu Ide
Keyword(s):  
Cortical Bone ◽  
Bone Thickness ◽  
Cortical Bone Thickness ◽  
Implant Placement ◽  
Root Proximity

scholarly journals Evaluation of mandibular inferior cortical bone thickness using panoramic radiographs in edentulous and dentate cases

2019 ◽  
Author(s):  
Reza Derafshi ◽  
Janan Ghapanchi ◽  
Mitra Farzin ◽  
Abdolaziz Haghnegahdar ◽  
Maryam Zahed ◽  
...  
Keyword(s):  
Cortical Bone ◽  
Cortical Thickness ◽  
Tooth Loss ◽  
Reference Points ◽  
Bone Thickness ◽  
Posterior Teeth ◽  
Panoramic Radiographs ◽  
Cortical Bone Thickness ◽  
Anterior Teeth ◽  
Significant Difference

Abstract Background: Osteoporosis is a disease of the bone structure which has many outcomes for the patient. Tooth loss and failure of implant placement can be related to this disorder in the jaw bones which is shown by the reduction of mandibular inferior cortical thickness. The aim of this study is to find a relationship between mandibular inferior cortical thickness using panoramic radiographs and tooth existence. Methods: A total of 57 panoramic views of complete edentulous patients and 164 partial edentulous cases were evaluated and compared to 117 dentate age and sex matched subjects. Mandibular cortical thickness was measured on 3 reference points (below the mental foramen (S1), estimated position of the first molar (S2) estimated position of the third molar (S3)) on both left and right sides using marking gauge in Agfa program. Results: Data revealed that cortical bone thickness was significantly reduced in older patients (P=0.031). The final value of the three measurements of the mandibular border thickness was 2.3128mm ± 0.74840 in the right side (RS) and 2.407±0.802 mm in the left side (LS) for the complete edentulous group, 2.9026± 0.7513 mm in RS and 2.9976 ±1.06769 in LS for partial edentulous group and 2.8709± 0.6263 in RS and 2.9812 ±0.83081 in LS for the dentate cases. Complete edentulous cases and partial edentulous cases that had lost posterior teeth had no significant difference in cortical thickness, but both groups had a significant thinner cortical width compared to dentate subjects (P= 0.001 and P=0.002). But lack of anterior teeth did not have the same effect compared to dentate individuals (P=0.929). Conclusions: The present study demonstrates a significant relationship between tooth loss in the posterior region and reduction of inferior mandibular border which is a value of osteoporosis. Anterior tooth loss however does not have the same effect. Dentist and physicians should be in close contact in such patients to avoid further tooth loss and also diagnose this chronic disease in earlier stages.

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