Quantitative investigation of palatal bone depth and cortical bone thickness for mini-implant placement in adults

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.

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Cortical bone thickness at common miniscrew implant placement sites

American Journal of Orthodontics and Dentofacial Orthopedics ◽

10.1016/j.ajodo.2009.03.057 ◽

2011 ◽

Vol 139 (4) ◽

pp. 495-503 ◽

Cited By ~ 98

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

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Cortical bone thickness and root proximity at mandibular interradicular sites: implications for orthodontic mini-implant placement

The Korean Journal of Orthodontics ◽

10.4041/kjod.2008.38.6.397 ◽

2008 ◽

Vol 38 (6) ◽

pp. 397 ◽

Cited By ~ 14

Author(s):

Ju-Eun Lim ◽

Won-Hee Lim ◽

Youn-Sic Chun

Keyword(s):

Cortical Bone ◽

Bone Thickness ◽

Cortical Bone Thickness ◽

Implant Placement ◽

Root Proximity

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

Iranian Journal of Orthodontics ◽

10.5812/ijo.115826 ◽

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.

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

Orthodontics and Craniofacial Research ◽

10.1111/j.1601-6343.2009.01465.x ◽

2009 ◽

Vol 12 (4) ◽

pp. 299-304 ◽

Cited By ~ 26

Author(s):

JE Lim ◽

SJ Lee ◽

YJ Kim ◽

WH Lim ◽

YS Chun

Keyword(s):

Cortical Bone ◽

Bone Thickness ◽

Cortical Bone Thickness ◽

Implant Placement ◽

Root Proximity

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

International Journal of Implant Dentistry ◽

10.1186/s40729-020-00249-z ◽

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.

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