Study About the Precision of Surgical Guides Used in Implantology

2018 ◽  
Vol 69 (3) ◽  
pp. 660-664
Author(s):  
Ionut Daniel Mihai ◽  
Roxana Mihai ◽  
Claudiu Vartolomei ◽  
Raluca Monica Comaneanu ◽  
Stefania Coman ◽  
...  
Keyword(s):  
Dental Implants ◽  
Future Studies ◽  
Surgical Guide ◽  
Surgical Guides ◽  
Number Of Patients ◽  
Group A ◽  
Dental Offices ◽  
Group B ◽  
Made In

The purpose of this study was to detect the precision of inserting dental implants using 3 types of surgical guides on 3 groups of patients according to the degree of implantologist experience. In this study, 27 patients were taken, in 3 groups of 9 patients, who addressed to dental offices in which were implantologists with 1 year (group A), 6 years (group B) and 11 years (group C) of experience in surgery. Lot A, operated by a 1-year physician with experience in implantology, had the smallest deviation, demonstrating the increased attention that he had to the interventions. Comparing B and C lots, the smallest deviations were recorded for group C, operated by implantologist with greater experience in implantology. By comparing the deviations according to the type of surgical guide used, the smallest deviations at the apex and prosthetic platform were made in patients where the implants were inserted with a bone supported guide, followed by dental-gingival and mucosal guide. In terms of axis of implantation, the lowest values were recorded for the dental-gingival guide, followed by the bone and mucosal guide. The study has a number of limitations (low number of patients undergoing study, low dispensation period), which requires more extensive future studies to validate the results.

scholarly journals The Bone Buttress Theory: The Effect of the Mechanical Loading of Bone on the Osseointegration of Dental Implants

Biology ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 12
Author(s):  
David Chavarri-Prado ◽  
Aritza Brizuela-Velasco ◽  
Ángel Álvarez-Arenal ◽  
Markel Dieguez-Pereira ◽  
Esteban Pérez-Pevida ◽  
...  
Keyword(s):  
Dental Implants ◽  
Mechanical Loading ◽  
Bone Growth ◽  
Bone Matrix ◽  
Test Group ◽  
Control Group ◽  
Group A ◽  
Bone To Implant Contact ◽  
The Stability ◽  
Group B

Objectives: To determine the effect of mechanical loading of bone on the stability and histomorphometric variables of the osseointegration of dental implants using an experimental test in an animal model. Materials and Methods: A total of 4 human implants were placed in both tibiae of 10 New Zealand rabbits (n = 40). A 6-week osseointegration was considered, and the rabbits were randomly assigned to two groups: Group A (Test group) included 5 rabbits that ran on a treadmill for 20 min daily during the osseointegration period; Group B (Controls) included the other 5 that were housed conventionally. The monitored variables were related to the primary and secondary stability of the dental implants (implant stability quotient—ISQ), vertical bone growth, bone to implant contact (BIC), area of regenerated bone and the percentage of immature matrix. Results: The results of the study show a greater vertical bone growth (Group A 1.26 ± 0.48 mm, Group B 0.32 ± 0.47 mm, p < 0.001), higher ISQ values (Group A 11.25 ± 6.10 ISQ, 15.73%; Group B 5.80 ± 5.97 ISQ, 7.99%, p = 0.006) and a higher BIC (Group A 19.37%, Group B 23.60%, p = 0.0058) for implants in the test group, with statistically significant differences. A higher percentage of immature bone matrix was observed for implants in the control group (20.68 ± 9.53) than those in the test group (15.38 ± 8.84) (p = 0.108). A larger area of regenerated bone was also observed for the test implants (Group A 280.50 ± 125.40 mm2, Group B 228.00 ± 141.40 mm2), but it was not statistically significant (p = 0.121). Conclusions: The mechanical loading of bone improves the stability and the histomorphometric variables of the osseointegration of dental implants.

Accuracy Computer-Guided Implant Placement using 3D Planning Software

2020 ◽  
Author(s):  
Gagik Hakobyan
Keyword(s):  
Survival Rate ◽  
3D Modeling ◽  
Treatment Time ◽  
Intraoperative Complications ◽  
Marginal Bone Loss ◽  
Surgical Time ◽  
Surgical Guide ◽  
Minimal Trauma ◽  
Group A ◽  
Group B

Purpose: To evaluate the effectiveness of implant treatment using computer 3D modeling and surgical guided. Materials and Methods: The study included 148 patients who underwent prosthodontics rehabilitation using dental implants in 2015-2020. 3D computer-aided modeling and surgical guide were used to plan the operation. To conduct a comparative analysis of the treatment results, two groups were formed: In group A (included 75 patients, fully guided surgery), in group B (included 73 patients). Results: In patients Group A intraoperative or immediate postoperative complications were noted (errors in the position, inclination), anatomical risk structures were invaded, after 3 years producing a survival rate of 96.2% In patients Group B, intraoperative complications were recorded; membrane perforation 4, errors in the position of the implants 16, the inclination of the implants 18, fenestration 12, after 3 years producing a survival rate of 97.6%. Mean marginal bone loss (MBL) patients in Group A were significantly higher than patients in group B (p < 0.05). In patients Group A the average surgical time from time of anesthesia to the placement of the healing abutment was 10.6 ± 2.9 min per implant, in patients Group B, the average surgical time was 16.4 ± 1.5 min per implant. Conclusion: The 3D modeling method and the controlled positioning of the implant allows surgical access with minimal trauma, reducing treatment time and complications.

Evaluation of the accuracy of a novel surgical guide for flapless dental implant placement for immediate loading in edentulous jaws

2021 ◽  
Author(s):  
Giovanni de Almeida Prado Di Giacomo ◽  
Patrícia Cury ◽  
Airton Moreira da Silva ◽  
Jorge Vicente Lopes da Silva ◽  
Carlos Eduardo Pompeo Souto ◽  
...  
Keyword(s):  
Dental Implants ◽  
Dental Implant ◽  
Selective Laser Sintering ◽  
Apical Region ◽  
Virtual Planning ◽  
Surgical Guide ◽  
Implant Placement ◽  
Surgical Guides ◽  
Edentulous Jaws ◽  
Edentulous Jaw

This study was designed to evaluate the accuracy of a novel computer-designed and selectively laser sintered surgical guide for flapless dental implant placement in the edentulous jaw. Fifty dental implants were placed in 11 patients with at least one totally edentulous jaw. Initially, cone-beam computed tomography (CBCT) was performed in each patient to define the virtual position of the dental implants based on the assessment of bone availability and the proposed dental prosthesis. After virtual planning, 3D surgical guides were printed using selective laser sintering. CBCT was repeated after the surgery, and the pre-and postoperative images were overlapped in the CAD software to compare the planned and actual positions of the dental implants using a one-sample t-test. The mean ± angular standard deviation between the long axes of the planned and final dental implant positions was 4.58 ±2.85 degrees; The linear deviation in the coronal position was  0.87 ± 0.49 mm and  in the apical region of the dental implants was 1.37 ± 0.69 mm. These differences were statistically significant (p &lt;0.001). The proposed modifications reduced the deviations, resulting in an improvement in the technique. We were able to place implants and temporary prostheses using the present protocol, taking into account the differences between the planned and final positions of the dental implants.

scholarly journals INTRAVENOUS REGIONAL ANESTHESIA (BIERS BLOCK);

2012 ◽  
Vol 19 (05) ◽  
pp. 710-714
Author(s):  
Muhammad ASGHER ◽  
ASIM GHAURI ◽  
MUHAMMAD ABDULLAH ◽  
Tariq Abassi
Keyword(s):  
Regional Anaesthesia ◽  
Military Hospital ◽  
P Value ◽  
Complete Evaluation ◽  
Intravenous Regional Anesthesia ◽  
Number Of Patients ◽  
Group A ◽  
The Mean ◽  
Group B ◽  
Intravenous Regional Anaesthesia

Objective: To compare the analgesic effects of combination of 0.5% Lidocaine plus Ketorolac in intravenous regionalanaesthesia technique with those of Lidocaine (0.5%) alone to prevent post operative pain after intravenous regional anaesthesia (Biersblock). Study design: Randomized Control Trial. Place and duration of study: The study was carried out at Department of Anaesthesiology,Intensive Care and pain management, Combined Military hospital, Rawalpindi from July 2008 to February 2009. Patients and Methods: Thestudy was conducted after complete evaluation of risk / benefit ratio to the patients. On the basis of random number method the patients weredivided into two equal groups (group A and group B). The number of patients in each group was 75. Group A was assigned Lidocaine in a dose of200mg 40ml of 0.5% solution and group B was assigned injection Ketorolac 30mg added to Lidocaine in a dose of 200mg 40ml of 0.5% solution.The patients were kept in post anaesthesia care unit for two hours and pain intensity was measured by visual analogue scale(VAS) on 15,30minutes,1hour, 1.5 and at 2 hours after the cuff deflation. The analgesic efficacy recorded on the basis of visual analog scale of two groups, wascompared using student’s t - test. p value of less than 0.05 was considered statistically significant. Results: In group A 33 males and 42 femaleswere enrolled for the study while in group B there were 38 males and 37 females. The mean age of the patients in group A was 34.31 ± 6.03years while in group B was 32.99 ± 6.08 years. Patients were also classified according to ASA classification in which 87 patients were classifiedas ASA – I and 63 patients as ASA – II. Group B which received Ketorolac in addition to Lidocaine for Bier’s block had low visual analogue scoresas compared to group A which received only Lidocaine for Bier’s block. P values obtained after the comparison of the mean VAS of two groupsat 15 minutes, 30 minutes, 1 hour, 1.5 hours and 2 hours were all less than 0.05 (0.002 for 15 minutes, 0.004 for 30 minutes, 0.001 for 1 hour,0.004 for 1.5 hours and 0.001 for 2 hours). Conclusions: Ketorolac improves the postoperative analgesia markedly when used with Lidocainein intravenous regional anaesthesia.

Energy-Based Devices Affect the Aesthetic Outcome of Cervical Thyroidectomy and Parathyroidectomy. A Retrospective Study

2021 ◽  
Vol 39 ◽  
Author(s):  
Antonella Pino ◽  
◽  
Lorenzo Gasco ◽  
Daqi Zhang ◽  
Paolo Carcoforo ◽  
...  
Keyword(s):  
Body Dysmorphic Disorder ◽  
The Body ◽  
University Hospital ◽  
Aesthetic Outcome ◽  
Aesthetic Result ◽  
Scar Assessment ◽  
Number Of Patients ◽  
Group A ◽  
Group B ◽  
The Impact

Introduction: Thyroid and parathyroid diseases are very common. Most of these cases are in women and may be amenable to surgery. The patient’s perception that these are not life-threatening diseases leads them to expect an excellent aesthetic result, since the surgical incision area is clearly visible. Objective: To evaluate different scarring outcomes using three different energy-based devices (Harmonic Focus®, Johnson & Johnson, New Brunswick, NJ; Thunderbeat Open Fine Jaw®, Olympus Medical, Tokyo, Japan; LigaSure Small Jaw®, Medtronic, Dublin, Ireland) and to determine the impact of post-thyroidectomy/parathyroidectomy scars on the patient’s quality of life. Methods: One hundred female patients who underwent thyroidectomy or parathyroidectomy between September 2017 and September 2019 at the Endocrine and Minimally Invasive Surgery Department of Messina University Hospital were recruited. A retrospective analysis assessed the thickness of the cervical scar via ultrasound imaging, and the patient’s degree of satisfaction through the Patient and Observer Scar Assessment Scale (POSAS) and the Body Dysmorphic Disorder Questionnaire (BDDQ). Results: The patients were divided into three groups according to the energy-device used: group A (LigaSure SJ (n=38), group B (Harmonic F, n=32) and group C (Thunderbeat OFJ, n=30). The three groups were homogeneous with respect to number of patients, age and surgical procedures. The best aesthetic result, which correlated with the lowest scar thickness, was observed in group A; these patients were more satisfied than those in the other two groups. Moreover, correlations between scar thickness and quantitative variables (such as age or BMI) were not found in any of the groups. Conclusions: Based on the data collected and our experience, the LigaSure Small Jaw® (Medtronic) seems to offer the best aesthetic outcome in patients who undergo transverse cervicotomy for thyroid and parathyroid diseases. However, further prospective studies involving a greater number of cases are needed.

scholarly journals A comparative study between dexmedetomidine and dexamethasone as an intrathecal adjuvant for prevention of perioperative shivering in cesarean section

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Mohamed Abdul Mohsen Abdul Naiem Ismaiel ◽  
Omar Mohamed Taha El Safty ◽  
Ashraf El Sayed El-Agamy ◽  
Omar Mohamed Zafer Mohamed ◽  
Mohamed Mourad Mohsen Mohamed Ali
Keyword(s):  
Cesarean Section ◽  
Statistical Difference ◽  
Sensory Block ◽  
List Type ◽  
Hyperbaric Bupivacaine ◽  
Analgesic Requirement ◽  
Number Of Patients ◽  
Duration Of Surgery ◽  
Group A ◽  
Group B

Abstract Background One of the most common problems in parturients receiving regional anesthesia during cesarean section is shivering. It usually interferes with the readings of the oxygen plethysmography (SpO2) and electrocardiogram (ECG). It expands the needs for oxygen and increases creation of carbon dioxide about four folds. The aim of this work is to compare the efficacy of dexamethasone and dexmedetomidine in prevention of perioperative shivering when added to hyperbaric bupivacaine intrathecally in cesarean sections (CS) and their effect on the intraoperative hemodynamics, intensity of the block, sedation, and postoperative analgesic requirement. Results Study included 60 obstetric patients who fulfilled all the inclusion criteria and were randomized into 2 equal groups, each consisting of 30 patients, namely group A (dexmedetomidine group) and B (dexamethasone group). Group A patients received 5 μg dexmedetomidine with 12.5 mg hyperbaric bupivacaine 0.5% intrathecally. Group B patients received 8 mg dexamethasone then 12.5 mg hyperbaric bupivacaine 0.5% intrathecally. The comparison included assessment of intra- and postoperative hemodynamics, duration of surgery, assessment of sensory and motor block, assessment for shivering and sedation, and assessment of adverse events. This study showed that there were a small number of patients complaining of shivering (five patients in group A and seven patients in group B) with no statistical difference between both groups in the incidence and intensity of shivering. Time to two segment regression (minutes) was longer in group B compared to group A, and also, time to first analgesic rescue was longer in group B compared to group A. For sedation intensity, there was statistical difference between both groups as all patients in group A were sedated compared to six patients only in group B. There was no statistical difference between both groups as regards incidence of adverse effects. Conclusion We concluded that both drugs can be added safely to bupivacaine, and both dexmedetomidine and dexamethasone decreased the incidence and the intensity of shivering. Dexamethasone was found to prolong the duration of sensory block and delay opioid requirements post-operatively, while dexmedetomidine is more effective in sedating the patients intra- and postoperatively.

Sentinel Lymph Node Identification in Breast Cancer: Feasibility Study

2000 ◽  
Vol 86 (4) ◽  
pp. 304-306 ◽  
Author(s):  
Cinzia Motta ◽  
Gianluca Cartia ◽  
Alfredo Muni ◽  
Mauro Giudici ◽  
Giorgio Falcetto ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Interdisciplinary Collaboration ◽  
Gamma Probe ◽  
Conservative Surgery ◽  
Care Workers ◽  
Group A ◽  
Group B ◽  
Age Range ◽  
Delayed Scan ◽  
Made In

The aim of the study was to evaluate in our institute the technique of sentinel node (SN) identification and biopsy in the surgical treatment of early breast cancer. Between June 1998 and November 1999 54 patients (age range, 31–75 years) where studied. Inclusion criteria were age less than 75 years, indication for conservative surgery, absence of palpable axillary nodes, Karnofksy index >70. Lymphoscintigraphy was performed 16–18 hours prior to surgery, following injection of 0.1–0.2 mL of 99mTc-Nanocoll: the administered activity was 3–4 MBq in group A (44 pts) and 7–8 MBq in group B (10 pts). The colloids were administered by transdermal supralesional injection in 49 patients with palpable nodules and by intraparenchymal ultrasound-guided injection in five patients with non-palpable nodules. Planar projections were performed starting from the 5th until the 80th min (or 180th in the event of late migration). In 10 patients further projections were acquired 14–18 h following tracer administration. All nodes identified by gamma probe (MR 100 Pol. Hi. Tech) were histologically evaluated by immunohistochemistry and standard histology. Scintigraphic visualization of the SN was obtained in 49 patients: in 38 of these patients there was only one SN while in 11 patients there were two or three SNs. The delayed scan made in 10 patients did not show any further nodes. In all patients given US-guided perilesional injections migration was late (after at least 60 min). Our study confirms the validity of the scintigraphic procedure, its safety for patients and health care workers, and the feasibility of interdisciplinary collaboration.

Effect of selective beta-blockade with bisoprolol in the treatment of recent-onset atrial fibrillation

Folia Medica ◽  
2012 ◽  
Vol 54 (2) ◽  
pp. 27-31 ◽  
Author(s):  
Maria N. Negreva ◽  
Atanas P. Penev
Keyword(s):  
Atrial Fibrillation ◽  
Sinus Rhythm ◽  
Combined Therapy ◽  
Beta Blockade ◽  
Recent Onset ◽  
Number Of Patients ◽  
Group A ◽  
Clinically Significant ◽  
Group B ◽  
Onset Atrial Fibrillation

ABSTRACT The incidence of atrial fibrillation has been rapidly increasing in recent years. The increased tonus of the sympathetic nervous system is related to the development of atrial fibrillation. OBJECTIVE: To study the effect of bisoprolol, a highly selective beta-blocker, on patients with recent-onset atrial fibrillation (< 48 hours) for regularization of the rhythm using propafenone. PATIENTS AND METHODS: The study includes 164 patients (81 women, 83 men, age 59.09 ± 10.81) with successfully restored sinus rhythm in recent-onset atrial fibrillation. The patients received either propafenone (group A, n = 82) or a combination of propafenone and bisoprolol (group B, n = 82). The studied patients were randomly allocated to the groups. Propafenone was administered intravenously as a 2 mg/kg bolus followed by infusion of 0.0078 mg/kg/min for 120 min and orally in dosage of 300 mg three times every 8 hours if arrhythmia persisted. Bisoprolol was administered in a single dose at the very beginning of propafenone treatment and only in patients from group B at a dose of 5 or 10 mg. Regularization of the rhythm was assessed at the 3rd, 6th, 12th and 24th hour. RESULTS: In the initial stages of regularization the combined therapy restored the sinus rhythm in a greater number of patients in comparison with the monotherapy (at the 6th hour 67.07% in group B versus 48.78% in group A, P < 0.05; at the 12th hour it was 87.80% versus 75.60%, respectively, P < 0.05). CONCLUSION: Early regularization of rhythm in patients with recent-onset atrial fibrillation reduces the likelihood of recurrent episodes of arrhythmia. This makes the application of selective beta-blockade clinically significant.

Assessment of the Correlation Between Insertion Torque and Resonance Frequency Analysis of Implants Placed in Bone Tissue of Different Densities

2014 ◽  
Vol 40 (3) ◽  
pp. 259-262 ◽  
Author(s):  
Luiz Carlos Magno Filho ◽  
Fabiano Ribeiro Cirano ◽  
Fernando Hayashi ◽  
Hsu Shao Feng ◽  
Alexandre Conte ◽  
...  
Keyword(s):  
Resonance Frequency ◽  
Dental Implants ◽  
Frequency Analysis ◽  
Pearson Correlation ◽  
T Test ◽  
Insertion Torque ◽  
Type I ◽  
Resonance Frequency Analysis ◽  
Group A ◽  
Group B

The primary stability of dental implants is fundamental for osseointegration. Therefore, this study aimed to assess the correlation between insertion torque (IT) and resonance frequency analysis (RFA) of implants placed in mandibles and maxillas of different bone densities. Eighty dental implants were placed in maxillas and mandibles, and IT and the implant stability quotient (ISQ) were measured at the time of implant insertion. Bone density was assessed subjectively by the Lekholm and Zarb index. The type I and II densities were grouped together (group A)as were the type III and IV densities (group B). The IT in group A was higher (Student t test, P = .0013) than in group B (46.27 ± 18.51 Ncm, 33.62 ± 14.74 Ncm, respectively). The implants placed in group A showed higher ISQ (Student t test, P = .0004) than those placed in group B (70.09 ± 7.50, 63.66 ± 8.00, respectively). A significant correlation between IT and the ISQ value was observed for group A (Pearson correlation test; r = 0.35; P = .0213) and for group B (r = 0.37; P = .0224). Within the limitations of this study, it was possible to conclude that there is a correlation between IT and RFA of implants placed in mandibles and maxillas of different bone densities.

scholarly journals Is Local Anesthetic Infiltration Prior to Intravenous Cannulation Beneficial to Patients?

2013 ◽  
Vol 8 (1) ◽  
pp. 10-13
Author(s):  
Babu Raja Shrestha ◽  
U Shrestha ◽  
A Shrestha ◽  
A Rana
Keyword(s):  
Heart Rate ◽  
Local Anesthetic ◽  
Randomized Study ◽  
Cardiovascular Responses ◽  
Control Group ◽  
Venous Cannulation ◽  
Number Of Patients ◽  
Group A ◽  
Group B ◽  
Local Anesthetic Infiltration

Aims: Intravenous cannulation causes pain, anxiety and frustration in patients along with changes in hemodynamic parameters. Infiltration of local anesthetic lessens the pain of intravenous cannulation. This study was performed to compare cardiovascular responses and verbal rating pain scores in two groups with and without local anesthetic infiltration prior to venous cannulation. Methods: This was a randomized study conducted in 100 elective surgical patients, divided into two study groups with 50 patients in each: group A (Control) and group B (local anesthetic infiltration). Prior to venous cannulation in group B, 0.5 ml of 1% lidocaine was infiltrated at the procedure site at dorsum of the wrist. Patients in group A were cannulated directly without local anesthetic infiltration. The hemodynamic changes pre and post cannulation and verbal pain rating scores were recorded by blind observers in all patients. Results: Demographic values in two groups were similar. Increase in heart rate from baseline value was significant in control group (p < 0.05). Post cannulation heart rate, systolic and diastolic blood pressure were significantly higher in group A compared to group B for the first three minutes (p < 0.05). Amongst higher number of patients in group A, verbal rating pain score was significantly higher. Ninety-four percent of the patients in group B were pain free, comfortable and satisfied with the procedure. Conclusions: Intravenous cannulation can be made pain free with patient satisfaction and hemodynamic stability if carried out with prior local anesthetic infiltration. Nepal Journal of Obstetrics and Gynaecology / Vol 8 / No. 1 / Issue 15 / Jan- June, 2013 / 10-13 DOI: http://dx.doi.org/10.3126/njog.v8i1.8853

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