Linear and Angular Deviations of Implants Placed in Experimental Casts with Stereolithographic Drill Guides Fixed by O'ring Ortho Implant Devices

The aim of this study was to evaluate whether the introduction of a device, resulting from the combination of an o'ring attachment with an orthodontic implant (o'ring ortho implant, O'ROI), to affix the surgical template of CAD/CAM-guided implant surgery contribute to minimizing the deviations in the position and inclination of implants at the time of their placement. Ten models simulating bone tissue were fabricated and randomly divided into 2 groups: 5 with the scanning and surgical template of the usual technique, representing the Control Group (C), and 5 with scanning and surgical templates fixed by o'ring ortho implants (O'ROI), representing the Test Group (T). Forty implants measuring 4×11 mm were placed in the groups, using the respective templates. The results were evaluated by the fusion of CT images of the planned and placed implants. The locations and axes were compared. There were no statistically significant differences for the angular (Tukey's test F = 1.06 and p = 0. 3124) and linear (ANOVA F = 2.54 and p = 0.11) deviations. However, the angular values of Group T showed a lower standard deviation in comparison with those of Group C. The use of o'ring ortho implants (O'ROI) is able to minimize the angular and linear deviation of implants at the time of their placement.

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Accuracy of Computer-Assisted Template-Based Implant Placement Using Two Different Surgical Templates Designed with or without Metallic Sleeves: A Randomized Controlled Trial

Dentistry Journal ◽

10.3390/dj7020041 ◽

2019 ◽

Vol 7 (2) ◽

pp. 41 ◽

Cited By ~ 9

Author(s):

Marco Tallarico ◽

Matteo Martinolli ◽

Yong-Jin Kim ◽

Fabio Cocchi ◽

Silvio Mario Meloni ◽

...

Keyword(s):

Controlled Trial ◽

Test Group ◽

Computer Assisted ◽

Virtual Planning ◽

Implant Placement ◽

Surgical Template ◽

Significant Difference ◽

Cad Cam ◽

Open Versus ◽

Surgical Templates

Purpose: To compare virtual planning accuracy of novel computer-assisted, template-based implant placement techniques, which make use of CAD/CAM stereolithographic surgical templates with or without metallic sleeves. Furthermore, to compare open versus closed sleeves for templates without metallic sleeves. Materials and methods: Any partially edentulous patients requiring at least one implant to be placed according to a computer-assisted template-based protocol were enrolled. Patients were randomized according to a parallel group design into two arms: Surgical template with or without metallic sleeves. Three deviation parameters (angular, horizontal, vertical) were defined to evaluate the discrepancy between the planned and placed implant positions. Results: No implants failed, and no complications were experienced. Forty-one implants were placed using surgical templates with metallic sleeves while 49 implants were placed with a surgical template without metallic sleeves. Of these, 16 implants were placed through open sleeves and 33 through closed sleeves. There was a statistically significant difference in angle (p = 0.0212) and in the vertical plan (p = 0.0073) with lower values for implants placed with a surgical template without metallic sleeves. In the test group, close sleeves were more accurate compared with open sleeves in angle (p = 0.0268) and in horizontal plan (p = 0.0477). Conclusion: With the limitations of the present study, surgical templates without metallic sleeves were more accurate in the vertical plan and angle compared to the conventional template with metallic sleeves. Open sleeves should be used with caution in the molar region only in case of reduced interarch space. Further research is needed to confirm these preliminary results.

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Piezocision-assisted orthodontic treatment using CAD/CAM customized orthodontic appliances: a randomized controlled trial in adults

European Journal of Orthodontics ◽

10.1093/ejo/cjy082 ◽

2019 ◽

Vol 41 (5) ◽

pp. 495-501 ◽

Cited By ~ 11

Author(s):

Carole Charavet ◽

Geoffrey Lecloux ◽

Nastasia Jackers ◽

Adelin Albert ◽

France Lambert

Keyword(s):

Orthodontic Treatment ◽

Treatment Time ◽

Controlled Trial ◽

Test Group ◽

University Hospital ◽

Control Group ◽

Orthodontic Appliances ◽

Overall Treatment Time ◽

Randomized Controlled ◽

Cad Cam

Summary Objective The aim of this study was to investigate the effects of piezocision (surgical protocol with sutures) in orthodontic treatment using CAD/CAM (computer-aided design and computer-aided manufacturing) customized orthodontic appliances. Design The study is designed as a parallel group, randomized controlled trial (RCT). Setting University Hospital. Ethical approval The study was approved by the ethic committee of the University Hospital Liege, Belgium. Subjects and methods This RCT was conducted on 24 adult patients requiring orthodontic treatment to release mild overcrowding. Patients were all treated with a customized appliance and randomly assigned by means of sealed envelopes containing group codes to either a test group treated with piezocision or a control group without any further treatment. A blinded orthodontist validated appliance removal or further adjustments based on the model study. Outcome measures The overall treatment time and the time between archwire changes were recorded. Moreover, clinical and radiological features such as tooth resorption, gingival recessions, and the presence of scars were evaluated. Results A total of 24 patients (12 control and 12 test) completed the study. The overall treatment time was significantly shorter in the test group than the control group. Likewise, the time difference between all arch changes was significantly lower when piezocision was performed, except for the first arch at the mandible and the last arches at both maxillae. During the fine-tuning phase, no significant difference was found between the two groups. All periodontal and radiographic parameters remained stable from the start to the end of treatment in both the groups. However, minor scars were found in 66 per cent cases. Limitations This trial was a single-centre trial. Conclusions Piezocision seems to be an effective method to accelerate orthodontic treatment in cases of mild overcrowding. However, the effect was only observed during the alignment phase and a greater efficiency was found in the maxilla. The technique may be contraindicated in patients with a high smile line since the risk of slight scarring exists. Registration ClinicalTrails.gov (Identifier: NCT03406130)

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Effects of the Preoperative Administration of Dexketoprofen Trometamol on Pain and Swelling After Implant Surgery: A Randomized, Double-Blind Controlled Trial

Journal of Oral Implantology ◽

10.1563/aaid-joi-d-17-00185 ◽

2018 ◽

Vol 44 (2) ◽

pp. 122-129

Author(s):

Arturo Sánchez-Pérez ◽

Jesús Muñoz-Peñalver ◽

María José Moya-Villaescusa ◽

Carmen Sánchez-Matás

Keyword(s):

Placebo Group ◽

Postoperative Pain ◽

Controlled Trial ◽

Test Group ◽

Control Group ◽

Double Blind ◽

Implant Surgery ◽

Lower Pain ◽

Dexketoprofen Trometamol ◽

Group A

The fear of postoperative pain is often mentioned by patients as one of the factors that is most frequently associated with dental implants. To reduce this factor, a single oral dose of 25 mg dexketoprofen trometamol (DKT) or placebo was administered 15 minutes before implant surgery. One hundred patients who required single-implant treatments were randomly assigned to 1 of 2 blinded groups. The patients in the test group were given 25 mg DKT (DKT group), and those in the control group were given 500 mg vitamin C as a placebo (PLACEBO group). A subjective visual analogue scale of 100 mm in length was used to evaluate pain. Inflammation and complications were assessed using a 5-point Likert scale. An analysis of variance, t-tests, and a Mann-Whitney U test were performed. Among the 100 patients, 83 completed the study (there were 8 dropouts in the PLACEBO group and 9 in the DKT group). The patients who received DKT reported a lower pain intensity during the immediate postoperative period. The inflammatory response was weaker in the DKT group than the control group at 48 hours, but bleeding was greater. There were no other complications in either of the groups. In conclusion, the preemptive use of 25 mg soluble DKT administered orally 15 minutes before implant surgery can reduce the severity of immediate postoperative pain.

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CAD-CAM cobalt-chromium surgical template for static computer-aided implant surgery: A dental technique

Journal of Prosthetic Dentistry ◽

10.1016/j.prosdent.2019.04.014 ◽

2020 ◽

Vol 123 (1) ◽

pp. 42-44 ◽

Cited By ~ 1

Author(s):

Wei-Shao Lin ◽

Chao-Chieh Yang ◽

Waldemar D. Polido ◽

Dean Morton

Keyword(s):

Cobalt Chromium ◽

Implant Surgery ◽

Surgical Template ◽

Computer Aided ◽

Cad Cam

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WORNOUT TIME (wt) at the End of One’s Lifetime: When the Lower Standard Deviation Curve (LSDC) of the Lognormal Process Finally Intercepts the Time Axis

Evo-SETI ◽

10.1007/978-3-030-51931-5_27 ◽

2020 ◽

pp. 833-837

Author(s):

Claudio Maccone

Keyword(s):

Standard Deviation ◽

Time Axis ◽

Lower Standard Deviation ◽

Lower Standard

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CAD/CAM fabrication and clinical application of surgical template and bone model in oral implant surgery

Clinical Oral Implants Research ◽

10.1111/j.1600-0501.2008.01588.x ◽

2009 ◽

Vol 20 (1) ◽

pp. 87-93 ◽

Cited By ~ 15

Author(s):

Taiji Sohmura ◽

Naoki Kusumoto ◽

Takafumi Otani ◽

Shinichi Yamada ◽

Kazumichi Wakabayashi ◽

...

Keyword(s):

Clinical Application ◽

Implant Surgery ◽

Bone Model ◽

Surgical Template ◽

Cad Cam ◽

Oral Implant

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Numerical hull resistance calculation of a catamarán using OpenFOAM

Ciencia y tecnología de buques ◽

10.25043/19098642.150 ◽

2017 ◽

Vol 11 (21) ◽

pp. 29

Author(s):

Diana S. Hurtado Bustos ◽

Rubén J. Paredes Alvarado

Keyword(s):

Experimental Data ◽

Standard Deviation ◽

Numerical Simulations ◽

Light Condition ◽

Lower Standard Deviation ◽

Lower Standard ◽

Convergence Study ◽

Travel Services ◽

Mesh Convergence ◽

Load Conditions

In the present study, numerical resistance predictions using OpenFOAM were performed considering the Cormorant Evolution Catamaran, which provides travel services in the Galapagos Islands. These predictions were compared with experimental data published by Chávez and Lucín [1] and with systematic series [2].Simulations were made at model scale of 2 [m] in two load conditions, considering demi and twin hull (s=0.56 [m]) configurations. A mesh convergence study was performed with 3 different meshes for V=1.05 [m/s] at Light Condition (T=0.086 [m]). The converged mesh, with 1 million of cells approximately, has the lower standard deviation and a 5% error when compared to its experimental value of 1.79 [N]. The errors between the experimental data and the numerical simulations for demi hull configuration were 43% and 36% for Light and Full conditions, respectively. Besides, for twin hull configuration the errors were around 14% and 32% for Light and Full conditions, respectively.

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Immediate oral rehabilitation with quad zygomatic implants: ultrasonic technique vs conventional drilling

Journal of Oral Implantology ◽

10.1563/aaid-joi-d-19-00195 ◽

2020 ◽

Cited By ~ 1

Author(s):

Marco Mozzati ◽

Giorgia Gallesio ◽

Funda Goker ◽

Margherita Tumedei ◽

Cesare Paoleschi ◽

...

Keyword(s):

Postoperative Complications ◽

Operative Time ◽

Test Group ◽

Control Group ◽

Ultrasonic Technique ◽

Implant Survival ◽

Implant Surgery ◽

Piezoelectric Surgery ◽

Zygomatic Implants ◽

Zygomatic Implant

The insertion of zygomatic implants is a challenging surgery and requires special care and great precision. Piezoelectric surgery offers several advantages, since it provides a more precise bone cutting with an improved intraoperative visibility and a low temperature increase.The aim of this case-control study was to evaluate if the use of ultrasonic instruments for zygomatic implant surgery can be as effective as standard drilling instruments in terms of clinical outcomes. Ninety-two patients with atrophic maxilla were included in the study. Implant sites were prepared either with ultrasonic technique (Test group- 47 patients) or with traditional drilling (Control group- 45 patients). In total, 368 zygomatic implants were inserted (202 with “extrasinus technique”, 77 with “sinus slot technique” and 89 with “Brånemark technique”). Complete arch provisional prostheses were delivered 3 to 5 hours after the surgical operations. The mean follow-up after surgery was 24 months (range 12-32 months). The primary outcome evaluations based on implant survival rates and postoperative complications. The operative time and surgeon’s stress were evaluated as secondary outcomes. According to the results, implant survival rate was 100% in Test, and 98.89% in Control group. The postoperative complications were seen in 9 patients (4 in Test, 5 in Control group), and the difference was not statistically significant. The operative time was longer in the Test group, however surgeons were more comfortable while using ultrasonic instruments. Within the limitations of this preliminary study, ultrasonic technique can be considered as a feasible alternative to traditional drilling for zygomatic implant surgery.

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Audit Fees and Client Industry Homogeneity

Auditing A Journal of Practice & Theory ◽

10.2308/ajpt-51040 ◽

2015 ◽

Vol 34 (4) ◽

pp. 33-57 ◽

Cited By ~ 13

Author(s):

Timothy D. Cairney ◽

Errol G. Stewart

Keyword(s):

Standard Deviation ◽

Audit Fees ◽

Data Availability ◽

Negatively Associated ◽

Lower Standard Deviation ◽

Lower Standard ◽

The Relationship ◽

Industry Homogeneity

SUMMARY This study examines the relationship between a client industry's homogeneity and audit fees. We assume that audit efficiencies occur in audits in industries whose members have similar operations and, therefore, are where auditors benefit from the use of similar audit procedures and experience lower average audit costs. To identify industries with similar operations, we use operational expense homogeneity, which is based on the correlations between the changes in operating expenses among industry members. Adapting a standard fee model (Hay, Knechel, and Wong 2006), we find that homogeneity is negatively associated with audit fees. Further, we find that specialist auditors charge lower fees in homogenous industries. Finally, we observe a lower standard deviation of fees in more homogenous industries. Together, these results suggest that auditors sustain lower costs in audits of homogenous clients and that the similarly lower costs incurred across auditors are passed on to clients in the form of lower fees. Data Availability: Data used in this paper are available from the sources listed in the paper.

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