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

Sawada, Kosaku; Nakahara, Ken; Matsunaga, Satoru; Abe, Shinichi; Ide, Yoshinobu

doi:10.1111/j.1600-0501.2011.02354.x

Cited by 30 publications

(22 citation statements)

References 11 publications

(24 reference statements)

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“…In recent years, with the rapid spread of dental implant treatment and a dramatic increase in accidents, the importance of precise 3D data on the human jaw is ever-increasing [1-3]. Bone resorption after tooth extraction is an unavoidable event, and the morphological features of the jawbone change greatly after tooth loss [4-7].…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional analysis of incisive canals in human dentulous and edentulous maxillary bones

et al. 2015

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Background The purpose of this study was to reveal the structural properties that need to be considered in dental implant treatment by investigating differences between dentulous and edentulous maxillae in the three-dimensional (3D) microstructure of the incisive canals (ICs) and their surrounding bone.MethodsA total of 40 maxillary bones comprising 20 dentulous maxillae and 20 edentulous maxillae were imaged by micro-CT for 3D observation and measurement of the IC and alveolar bone in the anterior region of the IC.ResultsThe Y-morphology canal was most frequently observed at 60% in dentulous maxilla and 55% in edentulous maxilla. There was a significant difference between dentulous and edentulous maxillae in IC diameter and volume, but no significant difference between the two in the major axis of the ICs.ConclusionsThe anatomic structure surrounding the IC has limited area for implant placement. Therefore, where esthetic and long-term maintenance requirements are taken into account, careful attention is needed when setting the placement position. Also, due to the resorption of bone, edentulous maxillae have a different IC morphology from dentulous maxillae, and therefore, a cautious approach is required.

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Section: Introductionmentioning

confidence: 99%

Three-dimensional analysis of incisive canals in human dentulous and edentulous maxillary bones

et al. 2015

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“…Recent studies have evaluated the cortical bone thickness for mini-implant placement in patients (7-10) and skulls (11-14) using computerized tomography (CT). Concerning the alveolar cortical bone density few studies exist in literature (15-18).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of alveolar cortical bone thickness and density for orthodontic mini-implant placement

Cassetta¹,

Sofan²,

Altieri³

et al. 2013

J Clin Exp Dent

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Objective: Mini-implant stability is primarily related to bone quality and quantity. This study evaluated alveolar cortical bone thickness and density differences between interradicular sites at different levels from the alveolar crest, and assessed the differences between adolescents (12-18 years of age) and adults (19-50 years of age), males and females, upper and lower arch, anterior and posterior region of jaws and buccal and oral side. Study Design: In this retrospective study, 48 Computed Tomography scans, performed for oral surgery purposes were selected from dental records of 3,223 Caucasian orthodontic patients. The SimPlant software (Materialise, Leuven, Belgium) was used to measure cortical bone thickness and density at 13 interradicular sites and four bone levels ( 2,4,6 and 8 mm ). For the statistical analysis descriptive statistics, Student’s t-test and Pearson correlation coefficient were used. Results: Statistically significant differences in alveolar cortical bone thickness and density between age, gender, sites and sides were found (P<0.05). The Pearson correlation coefficient demonstrated a significant linear increasing of thickness and density from crest to base of alveolar crest (P≤0.05). Conclusion. Adults show a thicker alveolar cortical bone than adolescents. Alveolar cortical bone thickness and density were greater in males than in females, in mandible than in maxilla, in the posterior region than the anterior, in oral than buccal side. There is an increase of thickness and density from crest to base of alveolar crest. Key words:Orthodontics, cortical bone thickness, cortical bone density, mini-implant, computed tomography, temporary anchorage devices.

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“…Hence, the mini-implant should be placed apically to avoid root proximity. The distance between the roots is widest between second premolar/first molar and first premolar/second premolar and the least between central incisor/lateral incisors [5]. This should be taken into consideration when selecting the site of mini-implant placement.…”

Section: Discussionmentioning

confidence: 99%

“…Proximity to the root surface, placement in the alveolar mucosa, and improper angulation have been attributed to mini-implant failure. Root proximity is a major cause of mini-implant failure [3,5]. Placement in the alveolar mucosa can result in peri-implantitis with failure of the mini-implant.…”

Section: Introductionmentioning

confidence: 99%

A simple three-dimensional stent for proper placement of mini-implant

Felicita

2013

Prog Orthod.

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BackgroundThis paper deals with the fabrication of a three-dimensional stent which is simple in design but provides an accurate placement of a mini-implant in three planes of space, namely, sagittal (root proximity), vertical (attached gingiva/alveolar mucosa) and transverse (angulation).FindingsThe stent is made of 0.018 × 0.025 in. stainless steel archwire which consists of a ‘u loop’ angulated at 20°, a vertical limb, a horizontal limb and a stop. The angulation of the ‘u’ helps in the placement of the mini-implant at 70° to the long axis of the tooth. The vertical height is determined such that the mini-implant is placed at the mucogingival junction. The mini-implant is placed with the aid of the stent, and its angulation and proximity to the adjacent roots are checked with a cone beam computed tomography image. The cone beam computed tomography image showed the mini-implant at an angle of 70° to the long axis of the tooth. There is no contact between mini-implant and the roots of the adjacent teeth.ConclusionThis stent is simple, easy to fabricate, cost-effective, and provides ease of insertion/removal, and three-dimensional orientation of the mini-implant.

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

Abstract: The findings of this study suggest that recommendations when low dose 3D multislice CT or low dose cone beam imaging is not available, the results of this research may be useful in providing indicators for selecting the design of the placement site.

Cited by 30 publications

References 11 publications

Three-dimensional analysis of incisive canals in human dentulous and edentulous maxillary bones

Three-dimensional analysis of incisive canals in human dentulous and edentulous maxillary bones

Evaluation of alveolar cortical bone thickness and density for orthodontic mini-implant placement

A simple three-dimensional stent for proper placement of mini-implant

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