scholarly journals The Difference of Marginal Bone Preservation between Dental Implants with Non-Threaded or Micro-Threaded Collar Designs

Coatings ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1232
Author(s):  
Mazen Almasri
Keyword(s):  
Bone Loss ◽  
Dental Implants ◽  
P Value ◽  
Marginal Bone Loss ◽  
Significant Difference ◽  
Bone Preservation ◽  
The Mean ◽  
The Difference ◽  
Implant System ◽  
Metal Show

This study analyzes the marginal bone loss (MBL) among dental implants characterized with non-threaded collar design (NT) when compared to the more classic micro-threaded collar design (MC) as such might reflect the future dentogengival esthetics, implant metal show, and mucositis. A total of 112 patients who received 311 implants have been included in the study and analyzed for their postoperative MBL using sequential periapical radiographs. The prevalence of postoperative peri-implant mucositis was recorded as well. The periapical radiographic comparison was performed between the immediate postoperative record and at the 24-month recall visit. Among the 311 implants, 124 (39.9%) had NT implants, and 187 (60.1%) had MC implants. Out of the 112 patients, 37 (44.6%) were females, and 10 (34.5%) were males included in the NT group. In contrast, 46 (55.4%) females and 19 (65.5%) males were in the MC group. The mean age among the two groups was 41.43 ± 15.900 and 46.68 ± 16.070, respectively. In contrast, the mean MBL among the groups were 0.544 ± 0.7129 and 0.061 ± 0.2648, respectively. The change in MBL was not positively correlated with gender (p-value = 0.154) or age (p-value = 0.115) in both groups. However, there was a significant difference (p-value = 0.001, X2 = 62.796, Df = 4) of MBL between the two implant systems themselves. The MBL was higher in people implanted with the NT system when compared to MC. Therefore, the MC implant system can be a better choice for marginal bone preservation, especially in restoring esthetically demanding areas in the mouth.

scholarly journals Trends of Implant Placement in Relation to Crestal Bone Level in a Private Dental Institute

2020 ◽  
Vol 11 (SPL3) ◽  
pp. 358-362
Author(s):  
Rinieshah Nair R Baskran ◽  
Rajendra Prabhu Abhinav ◽  
Murugaiyan Arun ◽  
Balaji Ganesh S
Keyword(s):  
Bone Loss ◽  
Dental Implants ◽  
P Value ◽  
Marginal Bone Loss ◽  
Oral Rehabilitation ◽  
Implant Placement ◽  
Significant Difference ◽  
Bone Level ◽  
Natural Dentition ◽  
Bone Height

Dental implants provide a strong foundation for fixed or removable prosthetic teeth that are made to match natural dentition. It has become an ideal method of oral rehabilitation after missing natural dentition has been recognised as a reliable tool for dental reconstruction and aesthetics. Marginal bone loss is characterized by a reduction in bone loss is characterized by a reduction in bone level both vertically and horizontally. The levels at which dental implants are placed include sub-crystal, equi-crestal, and supra-crestal. The crestal levels affect bone height significantly. Failure to do so will lead to peri-implant bone loss which will affect the implant function and ultimately implant failure. A retrospective study was conducted based on a university setting. 615 patients with 1141 implant sites were reviewed from June 2019 to March 2020. Excel tabulation and SPSS analysis were done for data analysis. There was a statistically significant difference between the variables that included tooth region, crestal relation and site (jaw)—[p-value<0.05] The most common crestal relation of implant placement is equi-crestal implant placement. The assessment of trends of implant placement in relation to crestal bone level shows that equi-crestal implant is the most preferred crestal relation of implant placement in Saveetha Dental College.

scholarly journals Clinical and Radiological Evaluation of Marginal Bone Loss around Dental Implants Restored with Zirconium vis-à-vis Porcelain Fused to Metal: An In Vivo Study

2020 ◽  
Vol 08 (01) ◽  
pp. 17-21
Author(s):  
Udey Singh Wirring ◽  
Tarun Kalra ◽  
Manjit Kumar ◽  
Ajay Bansal ◽  
Aquib Javaid
Keyword(s):  
Bone Loss ◽  
Dental Implants ◽  
Test Group ◽  
Radiographic Evaluation ◽  
Control Group ◽  
Marginal Bone Loss ◽  
Zirconia Crowns ◽  
Bone Level ◽  
The Difference

Abstract Introduction Marginal bone level is the criterion for implant success. Patient expectations for more natural looking implant restorations created the need to restore implants with more esthetically pleasing materials like Zirconia rather than conventional porcelain-fused to-metal (PFM) crowns. The aim of this study was to evaluate marginal bone loss around dental implants clinically and radiographically when restored with Zirconia and PFM prosthesis. Materials and Methods Two groups (control and test) were formed with 14 patients each. In the control group, the subjects were rehabilitated with PFM crowns and in the test group, the subjects were rehabilitated with Zirconia crowns. Rehabilitation was done after the healing period of 3 months. Radiographic evaluation was done at regular (baseline, 3rd, 6th, and 12th month) intervals. Results The results were statistically analyzed. Keeping in mind the limitations of the study, it was revealed that the difference in the crestal bone resorption in both the groups was not significant.

scholarly journals Peri-Implant Behavior of Sloped Shoulder Dental Implants Used for All-On-Four Protocols: An Histomorphometric Analysis in Dogs

Materials ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 119 ◽  
Author(s):  
Jose Calvo Guirado ◽  
Aldo Lucero-Sánchez ◽  
Ana Boquete Castro ◽  
Marcus Abboud ◽  
Sergio Gehrke ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Bone Loss ◽  
Dental Implants ◽  
Test Group ◽  
Control Group ◽  
Histomorphometric Analysis ◽  
Tissue Thickness ◽  
Marginal Bone Loss ◽  
Soft Tissue Thickness ◽  
The Mean

The aim of this study was to evaluate the soft tissue thickness and marginal bone loss around dental implants with sloped micro-threaded shoulder (30° angle) in comparing with conventional design, inserted 30° degrees angulated in post extraction sockets and immediate loaded with temporary prosthesis simulating the all-on-four protocol. Materials and Methods: Six fox hound dogs received forty-eight post extraction dental implants with the different diameter and length (Medentika, Germany), but with different neck configurations. Two group of implants were inserted 1mm subcrestal. Control group has a micro-threaded neck and the Test group has a sloped microthreaded neck. Immediate loading was applied using a constructed metallic structure. After three months, soft and hard tissue levels were assessed by histomorphometric analysis. Results: The mean soft tissue thickness (STT) was 2.5 ± 0.2 mm for the Control group and 3.3 ± 0.3 mm for Test group (p = 0.036), meanwhile the mean marginal bone loss (MBL) was 1.53 ± 0.34 mm for Control group and, 1.62 ± 0.22 mm for Test group (p > 0.05). Conclusions: Within the limitations of this experimental model in dogs, the findings showed that dental implants with microthreaded and microthreaded sloped necks installed in immediate post extraction sites with immediate load, presented a comparable perimplant tissue behavior.

Pseudonormokalemia in Patients with Thrombocytosis.

Blood ◽  
2006 ◽  
Vol 108 (11) ◽  
pp. 3964-3964
Author(s):  
Amir S. Steinberg ◽  
Raimonda Goldman ◽  
Randy L. Levine ◽  
Georgia Panagopoulos ◽  
Marvin C. Cooper
Keyword(s):  
Platelet Count ◽  
Serum Potassium ◽  
Interim Analysis ◽  
Plasma Potassium ◽  
Normal Serum ◽  
Control Group ◽  
P Value ◽  
Significant Difference ◽  
The Mean ◽  
The Difference

Abstract Introduction: Pseudohyperkalemia represents an artificial elevation in serum potassium concentration. It is well described that patients with thrombocytosis may have elevated serum but normal plasma potassium. The difference between serum and plasma potassium is felt to be due to potassium release from platelets during clotting. We propose to prove that a similar mechanism will lead to a "pseudonormokalemia," where serum potassium appears to be in the normal range (3.5–5.0 MEq/L) despite below-normal levels in the plasma(&lt;3.5 MEq/L). Method: This is an interim analysis of a prospective, IRB-approved planned comparison of 146 patients. We compared 36 thrombocytosis patients (platelets&gt;500,000/uL) to 36 control patients (platelets&lt;500,000/uL). Patients were identified from a list of lab results generated by a computer search and serum and plasma potassium and CBC were then drawn concomitantly. The two groups were compared using either the t-test or the Mann-Whitney U test depending on the distribution of the variables. A p &lt;.05 was considered a priori to indicate statistical significance. Results: There was no statistically significant difference in sex distribution or age between the two groups. The average platelet count was 643,190/uL in the thrombocytosis group (SD 134,426 uL) and 280,220/uL (SD 106,217 uL) in the control group with a p value &lt;0.001. While the serum potassium was noted to be significantly different between the two groups, the plasma potassium was not (see table). This was reflected in the difference between the serum and plasma potassium in the two groups. The thrombocytosis group was noted to have a difference between serum and plasma potassium of .52 MEq/L (SD .32 MEq/L) while the control group had a difference of .18 MEq/L (SD .23 MEq/L). The thrombocytosis group had 14 cases in which the difference between serum and plasma potassium was over 0.5 MEq/L whereas the control group had none. Conclusion: In this study, patients with thrombocytosis had higher mean serum potassium levels than the control group but similar mean plasma potassium levels. The mean difference between serum and plasma potassium (Delta) exceeded 0.5 MEq/L in the thrombocytosis arm and there was a statistically significant difference in the Delta values between the two groups. The mean platelet volume (MPV) of the thrombocytosis group was smaller than that of the control group. This indicates that the elevation in serum potassium in the thrombocytosis group cannot be attributed to the actual size of the platelets but rather to the number of platelets involved. Patients with thrombocytosis and normal serum potassium may actually be hypokalemic as this study demonstrates. As we continue to evaluate patients, we believe this difference will become more demonstratable. On interim analysis, our study suggests that in patients with thrombocytosis and normal serum potassium, plasma potassium should be considered along with routine labs. Group Comparison Values (N=36) Thrombocytosis Group-Platelets&gt;500,000/uL Control Group-Platelets&lt;500,000/uL p value Age 60.33 yrs 57.53 yrs p =.50 Serum K+ 4.43 MEq/L 4.15 MEq/L &lt;.001 Plasma K+ 3.91 MEq/L 3.97 MEq/L p =.54 Mean Delta between Serum and Plasma K+ .52 MEq/L (SD .32) .18 MEq/L (SD .23) &lt;0.001 Platelet Count 643.19 X103/uL 280.22X103/uL &lt;0.001 MPV 7.27 fl 8.24 fl &lt;0.001 WBC 12.05 mm3 9.98 mm3 p =.16

Evaluation of proximal bone loss around 2 commercial brands of SLA-surfaced implants and investigating possible effective factors

2020 ◽  
Author(s):  
Abbas Karimi ◽  
Nahid Azizimoghadam ◽  
Elahe Soltanmohamadi Borujeni
Keyword(s):  
Bone Resorption ◽  
Bone Loss ◽  
Dental Implants ◽  
Clinical Success ◽  
Pearson Correlation ◽  
Marginal Bone Loss ◽  
Effective Factors ◽  
Preprosthetic Surgery ◽  
Dental Implantation ◽  
Significant Difference

Introduction: The long term clinical success of dental implants depends on the stability of crestal bone level. Different dental implantation systems focus on micro-and macro-design to reduce late bone resorption. The purpose of this study was to evaluate bone loss at the proximal (mesial and distal) surfaces of SLA implants from 2 different companies. Materials and Methods: This retrospective cross-sectional study was done on 48 patients receiving 161 SLA-surfaced (Straumann and Dentium) dental implants. The marginal bone loss was measured at mesial & distal sides of the implants on peri-apical X-ray images. The effective factors considered in this study were patients age, implant brand, time passed from fixture placement, preprosthetic surgery and type of prosthetic treatment that were obtained from patient records & interviews. Results: Average mesial and distal bone loss was 1.50±1.359 and 1.517±1.3465 respectively. Pearson correlation coefficient indicates that 1) time passed from fixture placement, 2) commercial brand, 3) history of pre-prosthetic surgery and 4) age affected the amount of bone loss. Conclusion: SLA-surfaced dental implants showed an acceptable amount of bone resorption and no statistically significant difference was observed between commercial brands.

scholarly journals Treatment of Full and Partial Arches with Internal-Conical-Connection Dental Implants: Clinical Results after 5 Years of Follow-Up

2020 ◽  
Vol 10 (23) ◽  
pp. 8709
Author(s):  
Diego Lops ◽  
Riccardo Guazzo ◽  
Alessandro Rossi ◽  
Antonino Palazzolo ◽  
Vittorio Favero ◽  
...  
Keyword(s):  
Bone Loss ◽  
Dental Implants ◽  
Clinical Results ◽  
Marginal Bone Loss ◽  
Significant Difference ◽  
Distal Aspect ◽  
The Stability ◽  
Maxilla And Mandible ◽  
Implant Loading

The aim of the present investigation is to evaluate the implant therapy outcomes over a period of 5 years and to analyze several patient risk factors influencing the stability of the peri-implant tissues. Seventy-eight patients were consecutively treated between 2009 and 2017 and restored with implant-supported fixed prostheses. The following inclusion criteria were considered: partial or complete edentulism; residual bone volume of at least 3.3 mm in diameter and 8 mm in length; a favorable relationship between maxilla and mandible; at least a minimum 5 year follow-up for each implant included in the statistical analysis. Intraoral radiographs were taken at implant loading and every 12 months during the follow-up visits. They were subsequently stored on a personal computer and analyzed to determine the changes in bone level. Seventy-eight patients receiving 209 implants completed a minimum follow-up period of 5 years. One-hundred dental implants were inserted in the maxilla while 109 were placed in the mandible. Eleven (14.1%) out of 78 treated patients who received 29 (13.9%) dental implants were considered as drop-outs. On the whole, peri-implantitis was diagnosed in three implants. The average final pocket probing depth at implant level was 2.5 ± 1.2 mm. The average final bone loss after 5 years was 0.3 ± 0.4 mm, both at the mesial and distal aspect of the implant. The effects of the prosthesis type, sex and implant site did not statistically influence the marginal bone loss; on the contrary, a statistically significant difference regarding marginal bone loss was detected between smoker and non-smoker patients (p = 0.021). Implants with internal-conical abutment connection showed stable peri-implant bone levels at the medium-term follow-up. Nevertheless, further prospective long-term clinical studies are necessary to confirm these data.

The Influence of Prosthesis Design on the Outcomes of Tooth Implants Immediately Placed and Loaded by Means of One-Piece Titanium Machined Restoration

2018 ◽  
Vol 44 (2) ◽  
pp. 87-93 ◽  
Author(s):  
Paolo Toti ◽  
Simone Marconcini ◽  
Giammarinaro Enrica ◽  
Giorgio Pedretti ◽  
Antonio Barone ◽  
...  
Keyword(s):  
Bone Loss ◽  
Dental Implants ◽  
Survival Rates ◽  
Autogenous Bone ◽  
Marginal Bone Loss ◽  
Dental Prostheses ◽  
Posterior Maxilla ◽  
Significant Difference ◽  
Sinus Lifting ◽  
Fixed Dental Prostheses

Our purpose was to evaluate the occurrence of complications and the degree of bone loss in a cohort of patients treated with fixed prostheses supported by immediately loaded dental implants. The primary aim was to compare partial versus full-arch fixed dental prostheses. We then tested the effect of sinus lifting. In the present retrospective cohort study, the patients had their implants restored with fixed dental prostheses supported by dental implants positioned in the posterior maxilla and mandible. When necessary, the maxillary sinuses were grafted with particulate autogenous bone. Patients were then ranked according to the following predictors: length of prosthesis, crown-to-implant ratio, number of crowns to number of implants ratio, and presence of sinus lifting. Outcomes were evaluated for up to 2 years regarding the peri-implant marginal bone loss and implant/prosthesis survival rates. Fifty-eight subjects (209 implants) were rehabilitated with 25 fixed full-arch prostheses and 33 partial fixed dental implant bridges (16 supported by implants placed in grafted sinus). The mean marginal bone loss for implants supporting partial fixed dental prostheses amounted to 0.81 mm, whereas that for implants within the group of full-arch fixed dental prostheses was 1.21 mm; the comparison of the levels in the 2 groups showed a significant difference (P = .0055). A statistically significant difference (P = .0006) was found between the bone loss around maxillary implants (1.53 mm) and the bone loss around mandibular implants (1.10 mm). Two implants and 4 prostheses failed; 2-year survival rates of partial and of full-arch fixed dental prostheses, respectively, were 94.1% and 96%. Bone loss in full-arch prostheses appeared to be higher than in that of partial prosthesis. Implant-supported prostheses in the maxillae exhibited a bone loss higher than that registered in mandibles.

scholarly journals Clinical and radiological of the effects of two different implant surfaces on marginal tissues

2021 ◽  
Vol 11 (Suppl. 1) ◽  
pp. 152-159
Author(s):  
Muhammet Bahattin Bingül ◽  
Belgin Gülsün
Keyword(s):  
Bone Loss ◽  
Dental Implants ◽  
Dental Implant ◽  
Surface Group ◽  
Plaque Index ◽  
X Rays ◽  
Marginal Bone Loss ◽  
Pocket Depth ◽  
Significant Difference ◽  
Roughened Surface

Aim: In this study, our aim is to compare the effects of dental implants with nano laser excimer technology surface (NLE) and dental implant surfaces (MTX) with micro-roughened surface on marginal tissues with clinical and radiological data. Methodology: A total of 117 dental implants were followed clinically and radiologically. Clinically; Plaque index (silness-leöe), bleeding index in boring, pocket depth were evaluated and recorded 1 week after the insertion of the healing cap, 3 months, 6 months and 12 months after the end of the prosthesis. In the same periods, periapical x-rays were taken with the Rinn Holder method and the amount of marginal bone loss was measured. The data were analyzed with IBM SPSS Statistics Version 22 package program. Results: There was no loss in the implants included in the study. There was no statistically significant difference between the groups in terms of plaque index, bleeding index values (p>0,05). However, the pocket depth of the dental implant group with nano laser excimer technology surface is significantly lower than the micro-roughened surface group. There are statistically significant differences between the groups in terms of radiological marginal bone loss at 0, 3, 6, and 12 months (p<0,05). Radiological marginal bone loss values ​​of the micro-roughened surface group at 0, 3, 6, and 12 months were significantly lower compared to the same periods of the nano laser excimer technology group. Conclusion: It has been determined that the surface properties of dental implants can be effective on marginal tissues. In addition, we believe that routine checks by dentists who perform dental implant applications will increase the success of dental implants.   How to cite this article: Bingül MB, Gülsün B. Clinical and radiological of the effects of two different implant surfaces on marginal tissues. Int Dent Res 2021;11(Suppl.1):152-9. https://doi.org/10.5577/intdentres.2021.vol11.suppl1.23     Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

scholarly journals Comparative Study to Assess Paediatric Circumcision with the Plastibell Device Technique and Conventional Dissection Technique – A Prospective Randomised Trial

2020 ◽  
Vol 7 (45) ◽  
pp. 2645-2650
Author(s):  
Nilesh Parashuram Mangam ◽  
Lalit Vishvanath Tamgadge ◽  
Ashok Suryabhan Gajbhjye
Keyword(s):  
Average Rate ◽  
Randomised Trial ◽  
Late Complications ◽  
P Value ◽  
Age Group ◽  
Prospective Randomised Trial ◽  
Significant Difference ◽  
The Mean ◽  
The Difference ◽  
Dissection Technique

BACKGROUND Conventional Dissection Surgery (CDS) and Plastibell Device (PD) are the commonly used techniques for male circumcision. We wanted to evaluate and compare the postoperative problems and aesthetic results, and the patient’s / parent’s acceptance, of the two techniques of circumcision in boys. METHODS This was a prospective study in which children in the age group 0 - 12 years attending the surgery outpatient department for various indications of circumcision were enrolled on the basis of a predefined inclusion and exclusion criteria. The subjects were randomized and allocated into two groups, group PD and group CDS. Group PD was subjected to circumcision by Plastibell device technique. Group CDS was subjected to circumcision by conventional dissection technique. Duration of the circumcision and intra-operative complications if any were recorded, from starting the retraction of prepuce to completion of the procedure. Early and late complications were also compared during follow-up visits. Statistical analysis was performed using the Strata Software Version 10.0. P value less than 0.05 was taken as statistically significant. RESULTS The mean age of children in PD and CDS group was found to be 5.30 ± 3.29 years and 5.58 ± 3.66 years respectively. The mean age of patients in both the groups was found to be comparable with no statistically significant difference. According to Kayaba’s classification type 1 and type 2 (41.4 %) prepuce were most common in both the groups. Phimosis, ballooning of prepuce and recurrent urinary tract infection were common indications for circumcision in our study. Mean surgical time was 5.91 ± 1.74 in the P D group and 23.52 ± 5.94 in the CDS group which was statistically highly significant (P = 0.0000). Bleeding, cicatricial scar and adhesions were more common in CDS group, whereas dysuria and swelling were more common PD group and the difference was statistically significant. Children required less analgesia in CDS group. The average rate of late complications was significantly less in PD group as compared to CDS group (P = 0.006). CONCLUSIONS Circumcision by Plastibell device was comparable with conventional dissection technique in paediatrics age group. However, from aesthetic perspective, parents of Plastibell group appeared to be more satisfied than conventional dissection group. KEYWORDS Circumcision, Plastibell Device, Conventional Dissection Surgery, Complications

scholarly journals Survival and Marginal Bone Loss of Dental Implants Supporting Cad-Cam Angled Channel Restorations: A Split-Mouth Retrospective Study

2020 ◽  
Vol 14 (02) ◽  
pp. 194-199 ◽  
Author(s):  
Eduardo Anitua ◽  
Sofía Fernández-de-Retana ◽  
Mohammad Hamdan Alkhraisat
Keyword(s):  
Retrospective Study ◽  
Bone Loss ◽  
Dental Implants ◽  
Implant Survival ◽  
Marginal Bone Loss ◽  
Screw Channel ◽  
Computer Aided ◽  
Cad Cam ◽  
The Mean

Abstract Objective The aim of this study was to determine whether the screw emergence angulation correction by computer-aided design (CAD)-computer-aided manufacturing (CAM) can influence implant survival and marginal bone stability. Materials and Methods This was a controlled split-mouth retrospective study of angled channel restorations. The dental implants supporting the prosthesis were divided into the following two groups: the first group (Group 1) included the implants that required screw channel angulation, while the second group (Group 2) included the implants that did not require this correction to screw the prosthesis to the implant. The main outcome variables were implant survival and marginal bone loss (MBL). Results A total of 68 dental implants placed in 22 patients were included in the final cohort. The mean follow-up time was 39.65 ± 15.20 months. None of the studied implants failed during the follow-up period and the mean MBL was − 0.29 ± 0.51 mm at the end of the follow-up. No statistical differences in the MBL were observed between the two groups of the study (-0.18 ± 0.51 and − 0.23 ± 0.58 mm, respectively). Conclusion The angulation of the screw channel with CAD-CAM technology resulted in good clinical outcomes and did not affect MBL. Thus, the angulated screw channel might be considered an alternative to face undesired screw emergencies. Future prospective clinical studies should confirm these results.

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