Implications of virtual CBCT-based immediate implant planning for maxillary and mandibular first molars

2021 ◽  
Author(s):  
Li-Qi Zhang ◽  
Deng-Hui Duan ◽  
En-Bo Wang ◽  
Hom-Lay Wang ◽  
Zheng Liu
Keyword(s):  
Plate Thickness ◽  
Alveolar Ridge ◽  
Vertical Distance ◽  
Alveolar Crest ◽  
Ridge Height ◽  
Immediate Implant ◽  
Ridge Width ◽  
The Mean ◽  
Different Diameters ◽  
Immediate Implantation

The purpose of his study was to investigate the projected ridge-implant dimensions derived from virtual superimposition of implants on intact first molars mimicking immediate implantation in the mandible (Md1) and maxilla (Mx1) using cone-beam computed tomography (CBCT). The CBCT records of 41 patients (19 males and 22 females) with Md1 or Mx1 were collected. 10 mm-long cylindrical implants with different diameters were virtually positioned at prosthetically ideal angles into interradicular septum using CBCT software. Radiographic alveolar ridge height (ARH), alveolar ridge width (ARW), gap distance, and vertical distance from the implant platform to the alveolar crest were measured. Twenty Mx1s (48.8%) and 21 Md1s (51.2%) were included. The mean ARH values were 7.13 ± 4.32 mm and 15.64 ± 1.80 mm for Mx1 and Md1, respectively. 87.8% of mesiobuccal sites had gap distance > 2 mm when 6 mm diameter implants were used. Increasing implant diameter from 6 mm to 9 mm decreased the percentage of sites with ARW > 2 mm from 80.5% to 41.5% buccally and from 86.4% to 26.8% lingually. The mean vertical distance from the implant platform to the alveolar crest was 1.41 ± 1.09 mm buccally and 1.11 ± 1.10 mm lingually. Immediate implant placement of first molars, especially in the maxilla, requires stringent presurgical evaluation. Implants no wider than 6 mm placed into the interradicular septum may meet acceptable running room and alveolar plate thickness criteria if the jumping distance is grafted and further clinical trials are needed to confirm these findings in this virtual study

scholarly journals Sinus Augmentation with Simultaneous, Non-Submerged, Implant Placement Using a Minimally Invasive Hydraulic Technique

Medicina ◽  
2020 ◽  
Vol 56 (2) ◽  
pp. 75
Author(s):  
Liat Chaushu ◽  
Gavriel Chaushu ◽  
Hadar Better ◽  
Sarit Naishlos ◽  
Roni Kolerman ◽  
...  
Keyword(s):  
Minimally Invasive ◽  
Radiographic Evaluation ◽  
Control Group ◽  
Insertion Torque ◽  
Alveolar Ridge ◽  
Marginal Bone Loss ◽  
Sinus Augmentation ◽  
Ridge Height ◽  
The Mean

Background and objectives: To evaluate whether sinus augmentation, using a minimally invasive implant device, via a non-submerged surgical approach, might negatively influence the outcome. Materials and Methods: A retrospective cohort study was conducted by evaluating patients’ files, classifying them into two groups. Fifty patients (22 men 28 women) were included in the study, 25 in each group. The use of an implant device based on residual alveolar ridge height for sinus augmentation, radiographic evaluation, insertion torque, membrane perforation, post-operative healing, and a minimum of 12 months follow-up were evaluated. Results: The mean residual alveolar ridge height was 5.4 mm for the non-submerged group and 4.2 mm for the submerged group. There were no intraoperative or postoperative complications (including membrane perforations). The mean insertion torque was 45 N/cm for the study group and 20 N/cm for the control group. Complete soft tissue healing was observed within three weeks. Mean bone gain height was 8 mm for the study and 9.3 mm for the control group. All implants osseointegrated after 6–9 months of healing time. Mean follow-up was 17.5 months, range 12–36 months. Marginal bone loss at last follow-up was not statistically significantly different: 1 mm in the non-submerged vs. 1.2 mm in the submerged group. Conclusions: Submerged and non-submerged healing following maxillary sinus augmentation was comparable provided residual alveolar ridge height >5 mm and insertion torque >25 N/cm.

scholarly journals Immediate implant placement of BCS implant with and without platelet rich fibrin – An original research

2021 ◽  
Vol 7 (3) ◽  
pp. 143-150
Author(s):  
Sunny Sharma ◽  
Ramandeep Singh ◽  
Sonali Sharma ◽  
Sakshi Khajuria ◽  
Chander Udhey ◽  
...  
Keyword(s):  
Tooth Extraction ◽  
Clinical Effectiveness ◽  
Original Research ◽  
Alveolar Ridge ◽  
Platelet Rich Fibrin ◽  
Implant Placement ◽  
Immediate Implant ◽  
Immediate Implantation

Recently, immediate implant placement has rapidly gained popularity as this procedure definitively shortens the duration of the treatment, reduces the number of surgical sessions, and minimizes the discomfort of patients. However, the clinical effectiveness of immediate implantation in the molar regions has rarely been challenged. It has been reported that immediate implant placement does not seem to counteract alveolar ridge alteration and reconstruction after tooth extraction.

scholarly journals Maintenance of Alveolar Ridge Dimensions Utilizing an Extracted Tooth Dentin Particulate Autograft and Platelet-Rich fibrin: A Retrospective Radiographic Cone-Beam Computed Tomography Study

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1083 ◽  
Author(s):  
Snjezana Pohl ◽  
Itzhak Binderman ◽  
Jelena Tomac
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Plate Thickness ◽  
Cone Beam ◽  
Graft Material ◽  
Alveolar Ridge ◽  
Platelet Rich Fibrin ◽  
Dimensional Changes ◽  
Height Gain ◽  
Ridge Width

This study utilized radiographic comparative analysis in order to evaluate dimensional ridge changes four months after tooth extraction and immediate grafting with mineralized dentin particulate autograft and chopped platelet-rich fibrin. Fifty-eight extraction sockets with up to 2 mm of missing buccal bone in the coronal aspect compared to the lingual bone were included. Graft material was covered with either a platelet-rich fibrin membrane or collagen sponge with no effort to achieve primary closure. The dimensional changes of the ridge were assessed on cone-beam computed tomography (CBCT) images acquired prior to extraction and four months later. The reduction in the buccal bone plate thickness 1 mm, 3 mm, and 5 mm below the buccal crest was −0.87 ± 0.84 mm, −0.60 ± 0.70 mm, and −0.41 ± 0.55 mm, respectively. The mean ridge width changes 1 mm, 3 mm, and 5 mm below the crest were −1.38 ± 1.24 mm, −0.82 ± 1.13 mm, and −0.43 ± 0.89 mm, respectively. The average mid-buccal bone height gain was +1.1%, while the mid-lingual height gain was 5.6%. A mineralized dentin autograft with platelet-rich fibrin is effective in preserving post-extraction alveolar ridge dimensions.

scholarly journals Ridge Preservation using Dermis Allograft Tissue Matrix Membrane vs Connective Tissue Graft

2014 ◽  
Vol 4 (1) ◽  
pp. 10-16
Author(s):  
Celeste M Abraham ◽  
Jeffrey A Rossmann ◽  
Ibtisam Al-Hashimi ◽  
Eric S Solomon ◽  
David G Kerns ◽  
...  
Keyword(s):  
Connective Tissue ◽  
Autogenous Bone ◽  
Ridge Preservation ◽  
Alveolar Ridge ◽  
Connective Tissue Graft ◽  
Tissue Graft ◽  
Allograft Tissue ◽  
Ridge Width ◽  
The Mean ◽  
Tissue Matrix

ABSTRACT Purpose The purpose of this study was to compare extraction socket healing and alveolar ridge preservation using autogenous bone covered with connective tissue graft (CT) or acellular dermal matrix (ADM). Materials and Methods Sixteen nonsmoking, healthy patients with 18 nonmolar teeth requiring extraction participated in the study. Following extraction, the sockets were debrided, measured, and grafted with autogenous bone, then covered with either CT or ADM. Measurements of alveolar ridge width and height were made at baseline and after 16 to 20 weeks post extraction. Soft and hard tissue biopsies of the extraction sites were evaluated histomorphometrically. Results The mean buccolingual ridge width loss was 0.19 mm for both CT and ADM groups. The mean vertical bone gain was 1.08 mm bone for the CT group and 0.82 mm for the ADM group. Histologic evaluation revealed a mean bone fill of 40.67 and 50.76% for CT and ADM group respectively. Student t-tests did not reveal significant difference between the two groups. Conclusion The overall results of the study suggest that the use of bone graft covered with either CT or ADM is useful for ridge preservation. How to cite this article Tomlin EM, Kerns DG, Rossmann JA, Beach MM, Al-Hashimi I, Abraham CM, Solomon ES, Kessler HP. Ridge Preservation using Dermis Allograft Tissue Matrix Membrane vs Connective Tissue Graft. J Contemp Dent 2014;4(1):10-16.

scholarly journals Simulations of Ion-Guiding Through Insulating Nanocapillaries of Varying Diameter: Interpretation of Experimental Results

Atoms ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 48
Author(s):  
Nikolaus Stolterfoht
Keyword(s):  
Charge Transport ◽  
Emission Angle ◽  
Bulk Conductivity ◽  
Relaxation Rates ◽  
Non Linear ◽  
Bulk Relaxation ◽  
Linear Effects ◽  
The Mean ◽  
Different Diameters ◽  
Charged Ions

The guiding of highly charged ions through a single nanocapillary is simulated in comparison with previous experiments performed with highly insulating polyethylene terephthalate (PET). The simulations are carried out using 3-keV Ne7+ ions injected into capillaries with diameters ranging from 100 nm to 400 nm. In the calculations, non-linear effects are applied to model the charge transport along the capillary surface and into the bulk depleting the deposited charges from the capillary walls. In addition to the surface carrier mobility, the non-linear effects are also implemented into the bulk conductivity. A method is presented to determine the parameters of the surface charge transport and the bulk conductivity by reproducing the oscillatory structure of the mean emission angle. A common set of charge depletion rates are determined with relatively high accuracy providing confidence in the present theoretical analysis. Significant differences in the oscillatory structures, experimentally observed, are explained by the calculations. Experimental and theoretical results of the guiding power for capillaries of different diameters are compared. Finally, dynamic non-linear effects on the surface and bulk relaxation rates are determined from the simulations.

scholarly journals Alveolar ridge width and height changes after orthodontic space opening in patients congenitally missing maxillary lateral incisors

2011 ◽  
Vol 35 (1) ◽  
pp. 87-92 ◽  
Author(s):  
F. Uribe ◽  
V. Chau ◽  
S. Padala ◽  
W. P. Neace ◽  
A. Cutrera ◽  
...  
Keyword(s):  
Alveolar Ridge ◽  
Ridge Width ◽  
Congenitally Missing

Immediate Implantation With Ridge Augmentation Using Acellular Dermal Matrix and Deproteinized Bovine Bone: A Case Report

2011 ◽  
Vol 37 (6) ◽  
pp. 717-721 ◽  
Author(s):  
Jun-Beom Park
Keyword(s):  
Case Report ◽  
Treatment Time ◽  
Acellular Dermal Matrix ◽  
Bovine Bone ◽  
Dermal Matrix ◽  
Ridge Augmentation ◽  
Immediate Implant ◽  
Challenging Situation ◽  
Immediate Implantation ◽  
Acellular Dermal

Immediate implant placement combined with hard and soft tissue grafting has been suggested because it may preclude dramatic postextraction bone loss and may decrease overall discomfort with reduction in the number of surgeries and in treatment time. In this case report, the acellular dermal matrix was used as a membrane for immediate implantation via a bone augmentation procedure in an esthetically challenging situation. The author suggests that this surgical technique provides the clinician with an option for an immediate implant therapy when primary closure is not intended. Additional randomized controlled trials conducted over long periods are necessary to establish whether this procedure offers long-term benefit to patients.

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