Classification of Sagittal Root Position and Angulation of Premolars for Immediate Implant Placement: A Cone Beam Computed Tomography Study

Abstract Background: Sagittal root position (SRP) and thickness of buccal plate were of clinical guiding significance in implant treatment planning. The study was to classify the SRP and angulations of the maxillary and mandibular premolar to each osseous housing, and to measure the thickness of buccal plate by cone beam computed tomography (CBCT) in order to estimate the distributions and provide clinical decision support. Methods: CBCT images was reviewed on 150 patients who fulfilled the inclusion criteria. The sagittal root position and angulations of the maxillary and mandibular premolars to their respective osseous housing were evaluated and classified using CBCT images. The thickness of buccal plate at 1 mm, 3 mm, 5 mm apical to the alveolar crest was also measured. Results: The frequency distribution of SRP types indicated that, 41.67%, 51.83%, 3.67%, and 2.83% of maxillary premolars; 84.33%, 15%, 0%, and 0.67% of mandibular premolars were classified as type B, M, L, and N. The frequency distribution of angulation classifications indicated that, 20.83%, 46%, 32.17%, and 1% of maxillary premolars; 2%, 5.33%, 36.67%, and 56% of mandibular premolars were classified as class 1, 2, 3, and 4. The buccal bone thickness in most locations of premolar sites was less than 1 mm. Conclusions: The classification of clinical relevance of SRP and angulation of the premolar root to osseous housing would help for treatment planning and improving interdisciplinary communication of immediate implant placement (IIP) in the premolar region.

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Immediate Implant Placement in the Maxillary Aesthetic Zone: A Cone Beam Computed Tomography Study

Journal of Clinical Medicine ◽

10.3390/jcm10245853 ◽

2021 ◽

Vol 10 (24) ◽

pp. 5853

Author(s):

Anna Botermans ◽

Anna Lidén ◽

Vinícius de Carvalho Machado ◽

Bruno Ramos Chrcanovic

Keyword(s):

Computed Tomography ◽

Cortical Bone ◽

Cone Beam Computed Tomography ◽

Treatment Plan ◽

Cone Beam ◽

Tooth Position ◽

Implant Placement ◽

Root Position ◽

Immediate Implant ◽

Wall Perforation

This study aimed to investigate the factors that could be associated with the risk of labial cortical bone wall perforation with immediate implant placement (IIP) in the maxillary aesthetic zone, in a cone-beam computed tomography (CBCT) virtual study. CBCT exams from 126 qualified subjects (756 teeth) were included. Implants were virtually positioned in two different positions: in the long axis of the tooth (prosthetically-driven position) and in an ideal position in relation to adjacent anatomical structures (bone-driven position). Two different implant diameters were planned for each tooth position, namely, 3.75 and 4.3 mm for central incisors and canines, and 3.0 and 3.3 mm for lateral incisors. The incidence of perforation was nearly 80% and 5% for prosthetically- and bone-driven position, respectively. Factors associated with a higher risk of cortical bone wall perforation (bone-driven position), according to logistic regression analysis, were women, wider implants, Sagittal Root Position class IV, and decrease of the labial concavity angle. Perforation of the labial cortical bone wall can be greatly minimized when the implant is placed in a bone-driven position compared to a prosthetically-driven position. It is important to preoperatively evaluate the morphological features of the implant site for risk assessment and to individualize the treatment plan.

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Presurgical Cone Beam Computed Tomography Bone Quality Evaluation for Predictable Immediate Implant Placement and Restoration in Esthetic Zone

Case Reports in Dentistry ◽

10.1155/2017/1096365 ◽

2017 ◽

Vol 2017 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Corina Marilena Cristache

Keyword(s):

Computed Tomography ◽

Bone Quality ◽

Cone Beam Computed Tomography ◽

Quality Evaluation ◽

Multislice Computed Tomography ◽

Cone Beam ◽

Implant Placement ◽

Lower Radiation Dose ◽

Cad Cam ◽

Immediate Implant

Despite numerous advantages over multislice computed tomography (MSCT), including a lower radiation dose to the patient, shorter acquisition times, affordable cost, and sometimes greater detail with isotropic voxels used in reconstruction, allowing precise measurements, cone beam computed tomography (CBCT) is still controversial regarding bone quality evaluation. This paper presents a brief review of the literature on accuracy and reliability of bone quality assessment with CBCT and a case report with step-by-step predictable treatment planning in esthetic zone, based on CBCT scans which enabled the clinician to evaluate, depending on bone volume and quality, whether immediate restoration with CAD-CAM manufactured temporary crown and flapless surgery may be a treatment option.

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ASSESSMENT OF JAW BONE DENSITY IN TERMS OF HOUNSFIELD UNITS USING CONE BEAM COMPUTED TOMOGRAPHY FOR DENTAL IMPLANT TREATMENT PLANNING

Pakistan Armed Forces Medical Journal ◽

10.51253/pafmj.v71i1.3907 ◽

2021 ◽

Vol 71 (1) ◽

pp. 221-27

Author(s):

Myra Ahmad ◽

Yasir Ikram Ahmed ◽

Farheen Qureshi ◽

Muhammad Sharjeel Ashraf ◽

Zubair Ahmed Khan ◽

...

Keyword(s):

Computed Tomography ◽

Bone Density ◽

Treatment Planning ◽

Cone Beam Computed Tomography ◽

Cone Beam ◽

Hounsfield Units ◽

Implant Placement ◽

The Mean ◽

Anterior Mandible ◽

Implant Treatment

Objective: To assess jawbone density in terms of Hounsfield units using cone beam computed tomography fordental implant treatment planning in patients reporting to a local tertiary care dental hospital Study Design: Cross sectional study. Place and Duration of Study: Department of Periodontology and Oral Implantology, Fatima Memorial Hospital, Lahore, from Mar to Sep 2018. Methodology: A total of 100 patients who fulfilled the inclusion criteria and underwent implant placement wereincluded in the study. After ethical approval, informed and written consent, brief history was taken and a singleradiographer exposed and took cone beam computed tomography scan of all the subjects using PLANMECAmachine. A single investigator using PLANMECA software recorded jawbone density in terms of Hounsfieldunits. All data were presented as mean, SD and one way ANOVA was used. Multiple comparisons of the fourregions in the maxilla and mandible were performed with a Tukey test. An independent t-test was also used tocompare gender with age groups and bone density. Results: Total of 100 patients who underwent implant placement were included, 48 (48%) were males & 52 (52%) were females with the mean age of 28.53 ± 5.33 years. The mean jawbone density in terms of Hounsfield units using cone beam computed tomography in anterior maxilla was 709.75 ± 122.63 Hounsfield units, posterior maxilla was 299.66 ± 73.09 Hounsfield units, anterior mandible was 1093.34 ± 109.42 Hounsfield units and posterior mandible was 599.45 ± 135.55 Hounsfield units (p<.001). Conclusion: The anterior mandible and anterior...........

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Facial Fenestration and Dehiscence Defects Associated With Immediate Implant Placement Without Flap Elevation in Anterior Maxillary Ridge: A Preliminary Cone Beam Computed Tomography Study

The International Journal of Oral & Maxillofacial Implants ◽

10.11607/jomi.6575 ◽

2018 ◽

Vol 33 (5) ◽

pp. 1112-1118 ◽

Cited By ~ 3

Author(s):

Cho-Ying Lin ◽

Whei-Lin Pan ◽

Hom-Lay Wang

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Cone Beam ◽

Implant Placement ◽

Immediate Implant ◽

Flap Elevation

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IMMEDIATE IMPLANT PLACEMENT PLANNING IN MANDIBULAR POSTERIOR REGION USING CONE BEAM COMPUTED TOMOGRAPHY.

International Journal of Advanced Research ◽

10.21474/ijar01/7709 ◽

2018 ◽

Vol 6 (9) ◽

pp. 544-553

Author(s):

Manjari Chaudhary ◽

Ajay Bhoosreddy ◽

Apurva Patil ◽

Akanksha Bhandari ◽

Ashni Chatterjee ◽

...

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Posterior Region ◽

Cone Beam ◽

Implant Placement ◽

Immediate Implant

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Risk Associated with Immediate Implant at Mandibular Canine and Premolars: A Cone Beam Computed Tomography (CBCT) Study

Sains Malaysiana ◽

10.17576/jsm-2021-5004-15 ◽

2021 ◽

Vol 50 (4) ◽

pp. 1047-1056

Author(s):

Kirthiga Rameswaran ◽

Aminah Mohd Shariff ◽

Daniel Lim

Keyword(s):

Computed Tomography ◽

Nerve Injury ◽

Cone Beam Computed Tomography ◽

Primary Stability ◽

Root Apex ◽

Cone Beam ◽

Implant Placement ◽

Immediate Implant ◽

Mandibular Canine ◽

Implant Dentistry

With the evolution of implant dentistry, immediate implantation remains a challenge especially in achieving a good primary stability with avoidance of complications such as nerve injuries and lingual perforations. This study was aimed to determine the risks of nerve injury and lingual perforation following virtual implant placement at mandibular canines, mandibular first premolars and mandibular second premolars using cone beam computed tomography (CBCT) scans. From the total of 771 CBCT scans screened, 100 CBCT scans were included. Measurements were made based on the cross-section of the study teeth, that were mandibular canine, first premolar and second premolar, to obtain the distance between root apex and nerve canal as well as risk of nerve injury. A virtual implant was then placed at each site to assess the risk of lingual perforation. Generally, the distance between root apex and nerve was less than 6 mm and the highest risk of nerve injury was observed at second premolar (79.6%) followed by first premolar (45.3%) and canine (23.4%). Risk of lingual perforation following immediate implant placement was between 0.7-1.5%. The risk of nerve injury was considerably high due to insufficient root apex to nerve canal distance while the risk of lingual perforation was low.

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