scholarly journals The Use of Orientation Templates and Free-Hand Implant Insertion in Artificial Mandibles—An Experimental Laboratory Examination in Fifth-Year Dental Students

2018 ◽  
Vol 6 (3) ◽  
pp. 43 ◽  
Author(s):  
Matthias Schulz ◽  
Lena Rittmann ◽  
Ursula Range ◽  
Günter Lauer ◽  
Dominik Haim
Keyword(s):  
Three Dimensional ◽  
Dental Students ◽  
Cone Beam ◽  
Artificial Bone ◽  
Implant Placement ◽  
Experimental Laboratory ◽  
Bone Level ◽  
The Difference ◽  
Implant Dentistry ◽  
Time Required

Implant dentistry is a growing field in the education of undergraduate dental students. The present laboratory study evaluates factors which may potentially influence the accuracy of free-hand implant insertion and the use of an orientation template. After three-dimensional planning using coDiagnostiXTM, orientation templates, including sleeves for the pilot-drill in regions 41 and 45, were manufactured by thermoforming. Sixty-one fifth year dental students inserted one implant using the orientation template and another implant free-hand in an artificial mandible. Information regarding age, sex, handedness, education, and the time required for implant insertion were recorded. Subsequently, the mandibles were scanned using cone-beam-computed tomography and the accuracy of the implant position was assessed, while statistical analysis followed. The free-hand implant insertion resulted in a distal deviation of −1.34 ± 5.15° and a mesial mismatch of 0.06 ± 0.79 mm at the artificial bone level compared to the sleeves. When using the orientation templates, the deviation decreased to −0.67 ± 3.48° and a distal mismatch of −0.22 ± 0.62 mm was achieved. The difference was statistically significant for the mismatch (p < 0.049). Regarding the limitations of our study, it could be said that the accuracy level achieved by dental undergraduates using implant placement with orientation templates is comparable to that in other studies.

Nerve Damage Assessment Following Implant Placement in Human Cadaver Jaws: An Ex Vivo Comparative Study

2014 ◽  
Vol 40 (1) ◽  
pp. 76-82 ◽  
Author(s):  
Sema Murat ◽  
Kıvanç Kamburoğlu ◽  
Cenk Kılıç ◽  
Tuncer Ozen ◽  
Ayhan Gurbuz
Keyword(s):  
Damage Assessment ◽  
Ex Vivo ◽  
Imaging Modality ◽  
Nerve Damage ◽  
Cone Beam ◽  
Chi Square ◽  
Implant Placement ◽  
Chi Square Test ◽  
Cone Beam Computerized Tomography ◽  
The Difference

The present study compared the use of cone beam computerized tomography (CBCT) images and intra-oral radiographs in the placement of final implant drills in terms of nerve damage to cadaver mandibles. Twelve cadaver hemimandibles obtained from 6 cadavers were used. Right hemimandibles were imaged using peri-apical radiography and left hemimandibles using CBCT, and the images obtained were used in treatment planning for the placement of implant drills (22 for each modality, for a total of 44 final drills). Specimens were dissected, and the distances between the apex of the final implant drill and the inferior alveolar neurovascular bundle and incisive nerve were measured using a digital calliper. Nerves were assessed as damaged or not damaged, and the Chi-square test was used to compare nerve damage between modalities (P &lt; 0.05). Nerve damage occurred with 7 final drills placed based on peri-apical radiography (31.8%) and 1 final drill placed using CBCT images (4.5%). The difference in nerve damage between imaging modalities was statistically significant (P = 0.023), with CBCT outperforming intraoral film in the placement of final implant drills ex vivo. In order to prevent nerve damage, CBCT is recommended as the principal imaging modality for pre-implant assessment.

scholarly journals Virtually Planned and Integrated Template-Guided Implant Surgical Placement: A Case Report

2018 ◽  
Vol 06 (01) ◽  
pp. 040-042
Author(s):  
K. Kuckreja ◽  
Harinder Kuckreja
Keyword(s):  
Dimensional Space ◽  
Three Dimensional ◽  
Functional Restoration ◽  
Cone Beam ◽  
Immediate Loading ◽  
Surgical Guide ◽  
Implant Placement ◽  
Planning Software ◽  
Osseointegrated Implants ◽  
Three Dimensional Space

AbstractThe placement of dental implants in the maxillary anterior region is a challenge for clinicians because of existing anatomy and high esthetic demands. This article presents a case with limited anatomical three-dimensional space for implant placement and immediate loading for esthetic and functional restoration.Virtual implant placement was planned using cone beam computed tomography (CBCT) scan, casts with trial denture bases, implant planning software (Nobel Clinician), and prosthetic designing software (Procera) to fabricate a surgical guide.The article describes the successful application of “Smart Fusion” (Nobel Biocare) in the production of the surgical template for accurate placement of osseointegrated implants.

scholarly journals Accuracy of implant placement based on pre-surgical planning of three-dimensional cone-beam images: a pilot study

2007 ◽  
Vol 34 (9) ◽  
pp. 816-821 ◽  
Author(s):  
N. Van Assche ◽  
D. van Steenberghe ◽  
M. E. Guerrero ◽  
E. Hirsch ◽  
F. Schutyser ◽  
...  
Keyword(s):  
Pilot Study ◽  
Surgical Planning ◽  
Three Dimensional ◽  
Cone Beam ◽  
Implant Placement ◽  
Dimensional Cone

scholarly journals Cardiac Micro–Computed Tomography for Morphological and Functional Phenotyping of Muscle LIM Protein Null Mice

2007 ◽  
Vol 6 (4) ◽  
pp. 7290.2007.00022 ◽  
Author(s):  
Cristian T. Badea ◽  
Laurence W. Hedlund ◽  
Julie F. Boslego Mackel ◽  
Lan Mao ◽  
Howard A. Rockman ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Three Dimensional ◽  
Blood Pool ◽  
Micro Ct ◽  
Micro Computed Tomography ◽  
Isotropic Resolution ◽  
Lim Protein ◽  
Muscle Lim Protein ◽  
The Difference ◽  
Time Required

The purpose of this study was to investigate the use of micro–computed tomography (micro-CT) for morphological and functional phenotyping of muscle LIM protein (MLP) null mice and to compare micro-CT with M-mode echocardiography. MLP null mice and controls were imaged using both micro-CT and M-mode echocardiography. For micro-CT, we used a custom-built scanner. Following a single intravenous injection of a blood pool contrast agent (Fenestra VC, ART Advanced Research Technologies, Saint-Laurent, QC) and using a cardiorespiratory gating, we acquired eight phases of the cardiac cycle (every 15 ms) and reconstructed three-dimensional data sets with 94-micron isotropic resolution. Wall thickness and volumetric measurements of the left ventricle were performed, and cardiac function was estimated. Micro-CT and M-mode echocardiography showed both morphological and functional aspects that separate MLP null mice from controls. End-diastolic and -systolic volumes were increased significantly three- and fivefold, respectively, in the MLP null mice versus controls. Ejection fraction was reduced by an average of 32% in MLP null mice. The data analysis shows that two imaging modalities provided different results partly owing to the difference in anesthesia regimens. Other sources of errors for micro-CT are also analyzed. Micro-CT can provide the four-dimensional data (three-dimensional isotropic volumes over time) required for morphological and functional phenotyping in mice.

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

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.

scholarly journals Have conventional dental radiographs lost its charm to modern techniques?

2021 ◽  
Vol 9 (1) ◽  
pp. 3-6
Author(s):  
Kritika Rajan ◽  
Ishan Roy Choudhury
Keyword(s):  
Dental Implant ◽  
Three Dimensional ◽  
Clinical Findings ◽  
Cone Beam ◽  
Two Dimensional ◽  
Dental Patients ◽  
Implant Placement ◽  
Nasal Floor ◽  
Dental Radiographs ◽  
Cone Beam Tomography

For any dental implant procedure that is being carried out, the success will depend on a thorough pre-operative investigation. The quality, quantity and the volume of available bone at the planned implant site has to be assessed properly when planning a dental implant placement. When we speak of the fore-mentioned aspects pre-surgical imaging and its co-relation to clinical findings help assess the relation to the amount of bone available from underlying vital parts namely the sinus cavities, nasal floor, nerves, teeth and vessels. Different radiographic modalities have been advocated for its assessment. Intra Oral Peri-apical radiograph (two-dimensional) is one such modality that has lost its importance after the introduction of more advanced techniques like Cone Beam Tomography (three-dimensional). This article will help us understand how two-dimensional and three-dimensional imaging modalities go hand in hand while treating dental patients. It will also explain why the conventional imaging technologies are still required in this era of modern methods of imaging.

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