Multistepped Drill Design for Single-Stage Implant Site Preparation: Experimental Study in Type 2 Bone

2014 ◽  
Vol 17 ◽  
pp. e472-e485 ◽  
Author(s):  
Marcus Abboud ◽  
Rafael Arcesio Delgado-Ruiz ◽  
Allan Kucine ◽  
Sihana Rugova ◽  
Julian Balanta ◽  
...  
Keyword(s):  
Experimental Study ◽  
Site Preparation ◽  
Single Stage ◽  
Implant Site Preparation ◽  
Drill Design

scholarly journals A Novel Osteotomy Preparation Technique to Preserve Implant Site Viability and Enhance Osteogenesis

2019 ◽  
Vol 8 (2) ◽  
pp. 170 ◽  
Author(s):  
Chih-Hao Chen ◽  
Benjamin R. Coyac ◽  
Masaki Arioka ◽  
Brian Leahy ◽  
U. Serdar Tulu ◽  
...  
Keyword(s):  
Alveolar Bone ◽  
Rotational Velocity ◽  
Site Preparation ◽  
Osteogenic Potential ◽  
Osteotomy Site ◽  
Preparation Technique ◽  
Implant Site Preparation ◽  
Conventional Drilling ◽  
Drill Design ◽  
Practical Implications

The preservation of bone viability at an osteotomy site is a critical variable for subsequent implant osseointegration. Recent biomechanical studies evaluating the consequences of site preparation led us to rethink the design of bone-cutting drills, especially those intended for implant site preparation. We present here a novel drill design that is designed to efficiently cut bone at a very low rotational velocity, obviating the need for irrigation as a coolant. The low-speed cutting produces little heat and, consequently, osteocyte viability is maintained. The lack of irrigation, coupled with the unique design of the cutting flutes, channels into the osteotomy autologous bone chips and osseous coagulum that have inherent osteogenic potential. Collectively, these features result in robust, new bone formation at rates significantly faster than those observed with conventional drilling protocols. These preclinical data have practical implications for the clinical preparation of osteotomies and alveolar bone reconstructive surgeries.

Facial Reanimation of Patients With Neurofibromatosis Type 2

2011 ◽  
Vol 70 (suppl_2) ◽  
pp. ons237-ons243 ◽  
Author(s):  
Kalpesh T. Vakharia ◽  
Doug Henstrom ◽  
Scott R. Plotkin ◽  
Mack Cheney ◽  
Tessa A. Hadlock
Keyword(s):  
Facial Paralysis ◽  
Neurofibromatosis Type ◽  
Neurofibromatosis Type 2 ◽  
Gracilis Muscle ◽  
Single Stage ◽  
Care Plan ◽  
Muscle Transfer ◽  
Facial Reanimation ◽  
Oral Commissure

ABSTRACT BACKGROUND: Neurofibromatosis type 2 (NF2) is a tumor suppressor syndrome defined by bilateral vestibular schwannomas. Facial paralysis, from either tumor growth or surgical intervention, is a devastating complication of this disorder and can contribute to disfigurement and corneal keratopathy. Historically, physicians have not attempted to treat facial paralysis in these patients. OBJECTIVE: To review our clinical experience with free gracilis muscle transfer for the purpose of facial reanimation in patients with NF2. METHODS: Five patients with NF2 and complete unilateral facial paralysis were referred to the facial nerve center at our institution. Charts and operative reports were reviewed; treatment details and functional outcomes are reported. RESULTS: Patients were treated between 2006 and 2009. Three patients were men and 2 were women. The age of presentation of debilitating facial paralysis ranged from 12 to 50 years. All patients were treated with a single-stage free gracilis muscle transfer for smile reanimation. Each obturator nerve of the gracilis was coapted to the masseteric branch of the trigeminal nerve. Measurement of oral commissure excursions at rest and with smile preoperatively and postoperatively revealed an improved and nearly symmetric smile in all cases. CONCLUSION: Management of facial paralysis is oftentimes overlooked when defining a care plan for NF2 patients who typically have multiple brain and spine tumors. The paralyzed smile may be treated successfully with single-stage free gracilis muscle transfer in the motivated patient.

scholarly journals The Effectiveness of Osseodensification Drilling Protocol for Implant Site Osteotomy: A Systematic Review of the Literature and Meta-Analysis

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1147
Author(s):  
Alessio Danilo Inchingolo ◽  
Angelo Michele Inchingolo ◽  
Ioana Roxana Bordea ◽  
Edit Xhajanka ◽  
Donato Mario Romeo ◽  
...  
Keyword(s):  
Clinical Studies ◽  
Meta Analysis ◽  
Site Preparation ◽  
Insertion Torque ◽  
Local Bone ◽  
Significant Difference ◽  
Drilling Technique ◽  
Bone To Implant Contact ◽  
Implant Site Preparation

Many different osteotomy procedures has been proposed in the literature for dental implant site preparation. The osseodensification is a drilling technique that has been proposed to improve the local bone quality and implant stability in poor density alveolar ridges. This technique determines an expansion of the implant site by increasing the density of the adjacent bone. The aim of the present investigation was to evaluate the effectiveness of the osseodensification technique for implant site preparation through a literature review and meta-analysis. The database electronic research was performed on PubMed (Medline) database for the screening of the scientific papers. A total of 16 articles have been identified suitable for the review and qualitative analysis—11 clinical studies (eight on animals, three on human subjects), four literature reviews, and one case report. The meta-analysis was performed to compare the bone-to-implant contact % (BIC), bone area fraction occupied % (BAFO), and insertion torque of clockwise and counter-clockwise osseodensification procedure in animal studies. The included articles reported a significant increase in the insertion torque of the implants positioned through the osseodensification protocol compared to the conventional drilling technique. Advantages of this new technique are important above all when the patient has a strong missing and/or low quantity of bone tissue. The data collected until the drafting of this paper detect an improvement when the osseodensification has been adopted if compared to the conventional technique. A significant difference in BIC and insertion torque between the clockwise and counter-clockwise osseodensification procedure was reported, with no difference in BAFO measurements between the two approaches. The effectiveness of the present study demonstrated that the osseodensification drilling protocol is a useful technique to obtain increased implant insertion torque and bone to implant contact (BIC) in vivo. Further randomized clinical studies are required to confirm these pieces of evidence in human studies.

Primary Stability of Short Implants Inserted Using Piezoelectric or Drilling Systems: An In Vitro Comparison

2019 ◽  
Vol 45 (4) ◽  
pp. 259-266
Author(s):  
Claudio Stacchi ◽  
Matteo De Biasi ◽  
Lucio Torelli ◽  
Massimo Robiony ◽  
Roberto Di Lenarda ◽  
...  
Keyword(s):  
Cancellous Bone ◽  
Operative Time ◽  
Primary Stability ◽  
Site Preparation ◽  
Preparation Technique ◽  
Implant Stability ◽  
Implant Stability Quotient ◽  
Custom Made ◽  
Implant Site Preparation

The primary objective of the present in vitro study was to evaluate the influence of implant site preparation technique (drills vs ultrasonic instrumentation) on the primary stability of short dental implants with two different designs inserted in simulated low-quality cancellous bone. Eighty implant sites were prepared in custom-made solid rigid polyurethane blocks with two different low cancellous bone densities (5 or 15 pounds per cubic foot [PCF]), equally distributed between piezoelectric (Surgysonic Moto, Esacrom, Italy) and conventional drilling techniques. Two short implant systems (Prama and Syra, Sweden & Martina) were tested by inserting 40 fixtures of each system (both 6.0 mm length and 5.0 mm diameter), divided in the four subgroups (drills/5 PCF density; drills/15 PCF density; piezo/5 PCF density; piezo/15 PCF density). Insertion torque (Ncm), implant stability quotient values, removal torque (Ncm), and surgical time were recorded. Data were analyzed by 3-way ANOVA and Scheffé's test (α = 0.05). With slight variations among the considered dependent variables, overall high primary implant stability was observed across all subgroups. Piezoelectric instrumentation allowed for comparable or slightly superior primary stability in comparison with the drilling procedures in both implant systems. The Prama implants group showed the highest mean reverse torque and Syra implants the highest implant stability quotient values. Piezoelectric implant site preparation took prolonged operative time compared to conventional preparation with drills; among the drilling procedures, Syra system required fewer surgical steps and shorter operative time.

scholarly journals Experimental Study for the Single-stage and Double-stage Two-bladed Savonius Micro-sized Turbine for Rain Water Harvesting (RWH) System

2015 ◽  
Vol 68 ◽  
pp. 274-281 ◽  
Author(s):  
Norzanah Rosmin ◽  
Ahmad Safwan Jauhari ◽  
Aede Hatib Mustaamal ◽  
Faridah Husin ◽  
Mohammad Yusri Hassan
Keyword(s):  
Experimental Study ◽  
Single Stage ◽  
Rain Water ◽  
Water Harvesting ◽  
Rain Water Harvesting

scholarly journals Evaluation of plasma H2S levels and H2S synthesis in streptozotocin induced Type-2 diabetes-an experimental study based on Swietenia macrophylla seeds

2014 ◽  
Vol 4 ◽  
pp. S483-S487 ◽  
Author(s):  
Moumita Dutta ◽  
Utpal Kumar Biswas ◽  
Runu Chakraborty ◽  
Piyasa Banerjee ◽  
Utpal Raychaudhuri ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Experimental Study ◽  
Swietenia Macrophylla

scholarly journals Regular swimming session improves metabolic syndrome risk factors in women and men from Palestine: Quasi-experimental study

2020 ◽  
Author(s):  
Jamal Omar ◽  
Nidal Jaradat ◽  
Mohammad Qadoumi ◽  
Abdel Naser Qadoumi
Keyword(s):  
Risk Factors ◽  
Metabolic Syndrome ◽  
Experimental Study ◽  
Reference Group ◽  
High Density Lipoproteins ◽  
Post Exercise ◽  
Quasi Experimental ◽  
Blood Pressures

Abstract Background: Swimming and other aquatic fitness are important aerobic exercises that have been proposed as an effective nonpharmacological approach in the management of type 2 diabetes (T2DM), hyperlipidemia, and hypertension (HTN). The current study aimed to assess the effect of long-term swimming sessions on glycemic and lipidemic parameters, body composition, and hemodynamic responses for patients with metabolic risk factors. Methods: Forty participants from both genders with T2DM and HTN (aged 52.4±5.5 yrs) agreed to take part in this quasi-experimental study and were divided into two groups. The first group included the participants who performed long-term swimming sessions and the second group served as the reference. The first group exercised for 2 h, 3 times/week in 29-33 ◦C swimming pool for 16 weeks. While the reference group did not participate in any kind of exercise and advised to keep on with their normal lifestyle. All the obtained metabolic syndrome risk factors data were analyzed using a paired t-test which was applied to separately determine the differences between pre- and post-tests for both genders and groups, and the percentage of change (Δ %) was computed. Independent t-test was applied to determine the differences in the post-tests (Exp. vs Ref) in men patients as well as for women separately. Results: The results showed that there were statistically significant differences at p ≤ 0.05 between pre- and post- exercise concerning Total Cholesterol (TC), High-Density Lipoproteins (HDL), Low-Density Lipoproteins (LDL), Triglycerides (TG), glycemic parameters, systolic and diastolic blood pressures, body mass index (BMI) and fat mass percent in favor of posttests in the experimental group for both genders. Whereas, no significant differences were found at p≤0.05 between pre- and post-tests for all studied variables in the reference group for both genders. Significant differences were found at p≤0.05 on the post-tests in favor of the experimental for both genders.Conclusion: Findings of the current study suggested that the regular 16 weeks of the conducted swimming sessions could be considered as nonpharmacological approaches in the management of T2DM and HTN.

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