A Six-Year Prospective Comparative Study of Wide and Standard Diameter Implants in the Maxillary and Mandibular Posterior Area

Background and Objectives: The aim of our study was to test whether wide diameter (6 mm) implants perform differently from standard diameter (4 mm) implants in terms of marginal bone level and survival rate. Materials and Methods: Our sample comprised 72 patients who underwent surgery; a total of 80 implants were placed in the maxillary or mandibular molar region. Patients were divided into two groups according to the diameter of the implant, and were followed up for six years after the final setting of the prosthetics. In the test group, 40 implants with 6-mm diameter were inserted; in the control group, 40 standard diameter implants were inserted. Using panoramic radiographs, we investigated mesial and distal marginal bone levels around the implant fixtures. Results: After the first implant surgery, three implants, including one wide diameter and two standard diameter implants, failed due to lack of osseointegration. We did not note any fixture fracture during the six-year follow-up. After loading, we observed a six-year survival rate of 97.29% with no statistically significant difference from standard diameter implants, with a survival rate of 94.87%. Conclusions: This study shows that 6-mm diameter implants may be considered in the presence of adequate alveolar ridge width in the posterior maxillary and mandibular regions.

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The Association of the One-Abutment at One-Time Concept with Marginal Bone Loss around the SLA and Platform Switch and Conical Abutment Implants

Journal of Clinical Medicine ◽

10.3390/jcm11010074 ◽

2021 ◽

Vol 11 (1) ◽

pp. 74

Author(s):

Nasreen Hamudi ◽

Eitan Barnea ◽

Evgeny Weinberg ◽

Amir Laviv ◽

Eitan Mijiritsky ◽

...

Keyword(s):

Bone Loss ◽

Test Group ◽

Mucosal Barrier ◽

Control Group ◽

X Rays ◽

Marginal Bone Loss ◽

Bone Level ◽

The Difference ◽

The One

Objectives: Repeated abutment disconnection/reconnection may compromise the mucosal barrier and result in crestal bone level changes. The clinical significance of this phenomenon is not yet clear, as most studies on this topic are short-term. Therefore, the aim of the present study was to evaluate the influence of abutment disconnections and reconnections on peri-implant marginal bone loss over a medium-term follow-up period. Material and methods: Twenty-one patients (6 men and 15 women) with a mean age 66.23 ± 9.35 year at the time of implant placement were included. All patients who received two adjacent nonsubmerged implants were randomly assigned into one of the two groups: definitive multiunit abutments (DEFs) connected to the implant that were not removed (test group) or healing abutments (HEAs) placed at surgery, which were disconnected and reconnected 3–5 times during the prosthetic phase (control group). Peri-implant marginal bone levels (MBL) were measured through periapical X-rays images acquired immediately after the surgery (baseline), at 4–7 months immediately after prosthetic delivery, and at 1-year and 3-year follow-up visits. Results: No implant was lost or presented bone loss of more than 1.9 mm during the 3-year follow-up; thus, the survival and success rate was 100%. Peri-implant mucositis was noticed in 38.1% DEFs and 41.9% of HEAs at the 3-year follow-up assessment. At the end of 3 years, the MBL was −0.35 ± 0.69 mm for participants in the DEFs group and −0.57 ± 0.80 mm for the HEAs group, with significant statistical difference between groups. Conclusions: Immediate connection of the multiunit abutments reduced bone loss in comparison with 3–5 disconnections noted in the healing abutments 3 years after prosthetic delivery. However, the difference between the groups was minimal; thus, the clinical relevance of those results is doubtful.

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Peri-implant evaluation of osseointegrated implants subjected to orthodontic forces: results after three years of functional loading

Dental Press Journal of Orthodontics ◽

10.1590/2177-6709.21.2.073-080.oar ◽

2016 ◽

Vol 21 (2) ◽

pp. 73-80 ◽

Cited By ~ 2

Author(s):

Bruna de Rezende Marins ◽

Suy Ellen Pramiu ◽

Mauro Carlos Agner Busato ◽

Luiz Carlos Marchi ◽

Adriane Yaeko Togashi

Keyword(s):

Test Group ◽

Control Group ◽

Orthodontic Anchorage ◽

Clinical Evaluations ◽

Implant Placement ◽

Osseointegrated Implants ◽

Probing Depth ◽

Significant Difference ◽

Orthodontic Forces

ABSTRACT Objective: The objective of this study was to clinically and radiographically assess the peri-implant conditions of implants used as orthodontic anchorage. Methods: Two groups were studied: 1) a test group in which osseointegrated implants were used as orthodontic anchorage, with the application of 200-cN force; and 2) a control group in which implants were not subjected to orthodontic force, but supported a screw-retained prosthesis. Clinical evaluations were performed three, six and nine months after prosthesis installation and 1- and 3-year follow-up examinations. Intraoral periapical radiographs were obtained 30 days after surgical implant placement, at the time of prosthesis installation, and one, two and three years thereafter. The results were compared by Kruskal-Wallis test. Results: There was no statistically significant difference in clinical probing depth (p = 0.1078) or mesial and distal crestal bone resorption (p = 0.1832) during the study period. After three years of follow-up, the mean probing depth was 2.21 mm for the control group and 2.39 mm for the test group. The implants of the control group showed a mean distance between the bone crest and implant shoulder of 2.39 mm, whereas the implants used as orthodontic anchorage showed a mean distance of 2.58 mm at the distal site. Conclusion: Results suggest that the use of stable intraoral orthodontic anchorage did not compromise the health of peri-implant tissues or the longevity of the implant.

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Outcome of periodontal–orthodontic treatment in subjects with periodontal disease. Part II: a CBCT study of alveolar bone level changes

European Journal of Orthodontics ◽

10.1093/ejo/cjz039 ◽

2019 ◽

Vol 41 (6) ◽

pp. 565-574 ◽

Cited By ~ 3

Author(s):

Eglė Zasčiurinskienė ◽

Henrik Lund ◽

Rune Lindsten ◽

Henrik Jansson ◽

Krister Bjerklin

Keyword(s):

Periodontal Disease ◽

Orthodontic Treatment ◽

Alveolar Bone ◽

Test Group ◽

Periodontal Treatment ◽

Control Group ◽

Computed Tomography Images ◽

Significant Difference ◽

Bone Level ◽

Maxillary Incisors

Abstract Aim To examine alveolar bone level (ABL) changes before (T1) and after (T2) orthodontic treatment (OT) in subjects with periodontal disease. Methods The study included 50 subjects with periodontal disease. All patients received subgingival debridement following baseline examination. Control group patients received final periodontal treatment before the start of OT. For the test group patients final periodontal treatment was performed simultaneous to OT. OT was performed with a straight-wire appliance. Micro-implants or temporary crowns on implants were used for posterior anchorage when needed. ABL measurements of 3821 tooth surfaces were performed on cone beam computed tomography images. Results No difference was observed between mean ABL at T1 and T2. ABL remained unchanged on 69 per cent of surfaces. A mean of 15.6 (SD 7.4) per cent of surfaces experienced ABL gain, and a mean of 15.1 (SD 7.5) per cent was found with ABL loss. Small significant median ABL difference was observed on mesial and distal surfaces (P < 0.001). A significant difference was found between median ABL changes on mesial/distal in comparison to buccal/lingual surfaces (P < 0.01). Significantly more buccal (17.9 %) and lingual (18.5 %) surfaces experienced ABL loss when compared with mesial (11.3 %) and distal (12.0 %) surfaces (P < 0.001). Significant difference was found in the median ABL change of intruded (0.5 (IQR 0.94) mm) and non-intruded (−0.4 (IQR 1.07) mm) maxillary incisors (P = 0.04). Significant median ABL gain was found on the lingual surface of maxillary incisors, which were retroclined more than 8.6 degree and intruded more than 1.6 mm. Conclusions ABL changes after periodontal–orthodontic treatment in patients with periodontal disease were small. ABL gain was more observed on mesial and distal surfaces and ABL loss on buccal and lingual surfaces. Larger orthodontic movements of maxillary incisors influenced ABL gain.

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Early Loading of Mandibular Molar Single Implants: 1 Year Results of a Randomized Controlled Clinical Trial

Materials ◽

10.3390/ma13183912 ◽

2020 ◽

Vol 13 (18) ◽

pp. 3912 ◽

Cited By ~ 1

Author(s):

Jungwon Lee ◽

Young-Jun Lim ◽

Bongju Kim ◽

Ki-Tae Koo

Keyword(s):

Soft Tissue ◽

Computer Aided Design ◽

Control Group ◽

Controlled Clinical Trial ◽

Insertion Torque ◽

Early Loading ◽

Mandibular Molar ◽

Computer Aided ◽

Bone Level

The purpose of this study was to compare the implant survival, peri-implant marginal bone level, and peri-implant soft tissue of three different types of implants. This was performed with an early loading protocol, using a complete digital workflow, for one year of follow-up. Twenty-four patients with a single missing tooth in the mandibular posterior region were randomly assigned to the control group (SLActive Bone level implant; Institut Straumann AG, Basel, Switzerland), experiment group 1 (CMI IS-III Active implant; Neobiotech Co., Seoul, Korea), and experiment group 2 (CMI IS-III HActive implant; Neobiotech Co., Seoul, Korea). For each patient, a single implant was installed using the surgical template, and all prostheses were fabricated using a computer-aided design/computer-aided manufacturing system on a 3-dimensional model. A provisional prosthesis was implanted at 4 weeks, and a definitive monolithic zirconia prosthesis was substituted 12 weeks following the implant placement. The implant stability quotient (ISQ) and peri-implant soft tissue parameters were measured, and periapical radiographs were taken at 1, 3, 4, 8, 12, 24, 36, and 48 weeks after implant placements. Seven implants in the control group, nine implants in the experiment 1 group, and eight implants in the experiment 2 group were analyzed. There were no significant differences among the three groups in terms of insertion torque, ISQ values between surgery and 8 weeks of follow-up, marginal bone loss at 48 weeks of follow-up, and peri-implant soft tissue parameters (P > 0.05). Statistically significant differences in ISQ values were observed between the control and experiment 1 groups, and the control and experiment 2 groups at the 12 to 48 weeks’ follow-ups. Within the limits of this prospective study, an early loading protocol can be applied as a predictable treatment modality in posterior mandibular single missing restorations, achieving proper primary stability.

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Tapered, Double-Lead Threads Single Implants Placed in Fresh Extraction Sockets and Healed Sites of the Posterior Jaws: A Multicenter Randomized Controlled Trial with 1 to 3 Years of Follow-Up

BioMed Research International ◽

10.1155/2017/8017175 ◽

2017 ◽

Vol 2017 ◽

pp. 1-16 ◽

Cited By ~ 3

Author(s):

Alessandro Cucchi ◽

Elisabetta Vignudelli ◽

Simonetta Franco ◽

Luca Levrini ◽

Dario Castellani ◽

...

Keyword(s):

Controlled Trial ◽

Survival Rates ◽

Test Group ◽

Primary Stability ◽

Control Group ◽

Complication Rates ◽

Significant Difference ◽

Multicenter Randomized Controlled Trial ◽

Implant Crown

Purpose. To evaluate the survival, success, and complication rates of tapered double-lead threads single implants, placed in fresh extraction sockets and healed sites of the posterior jaws. Methods. The enrolled patients were randomly divided into 2 groups: in the test group (TG), all implants were inserted at the time of tooth extraction; in the control group (CG), all implants were placed 3 months after extraction. The implants were followed for a period of 1 to 3 years after loading. The main outcomes were implant survival, complications, and implant-crown success. Results. Ninety-two patients had 97 installed implants (49 in the TG, 48 in the CG). Only two implants failed, in the TG; the survival rates were therefore 95.9% (47/49) and 100% (48/48) for TG and CG, respectively. In the surviving implants, no complications were reported, for an implant-crown success of 100%. Conclusions. Although a significant difference was found in the levels of primary stability between TG and CG, single implants placed in fresh extraction sockets and healed sites of the posterior jaws had similar survival and complication rates. Crestal bone levels and peri-implant bone resorption showed similar values. A longer follow-up period is however required, to confirm these positive outcomes.

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Non routine use of alveolar incision in Von Langenbeck technique palatoplasty in children; a safe and viable technique in our centre

International Surgery Journal ◽

10.18203/2349-2902.isj20192941 ◽

2019 ◽

Vol 6 (7) ◽

pp. 2239

Author(s):

Philemon E. Okoro ◽

Benjamin M. Kejeh

Keyword(s):

Blood Loss ◽

Cleft Palate ◽

Statistical Significance ◽

Test Group ◽

Control Group ◽

Significant Difference ◽

Duration Of Surgery ◽

Prospective Comparative Study ◽

And Gender ◽

Isolated Cleft Palate

Background: Repair of the palate is among the challenging reconstructive surgeries in children. No single technique has achieved completely satisfactory results. The von Langenbeck technique (VLT) is one of the techniques in common use. We have sort to find out if the lateral alveolar incision in VLT can be safely avoided in selected cases.Methods: This is a prospective comparative study of cases of isolated unilateral cleft palate in children 18 years and below which were repaired using the VLT with and without lateral alveolar incision in our centre between January 2013 and December 2018. Outcome parameters obtained included duration of surgery, blood loss, complication and fistula rates. Data was analyzed using SPSS 21. Statistical significance was set at p<0.05.Results: Eighty four patients were included in the study; 36 were in the test group and 48 were in the control group. There was no significant difference in the age, weight and gender of the two groups. The duration of surgery was significantly shorter in the test group and fistula and complication rate was less.Conclusions:This study has demonstrated that comparable, if not better results can be achieved in well selected patients with unilateral isolated cleft palate using only dissection along the margin of the cleft. This new technique reduces the duration of surgery and anaesthesia and may reduce blood loss and complications.

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Long term (five-year) survival following radical surgical treatment plus adjuvant chemotherapy (FAM) in advanced gastric cancer: a controlled study

Revista do Hospital das Clínicas ◽

10.1590/s0041-87812000000400004 ◽

2000 ◽

Vol 55 (4) ◽

pp. 129-136 ◽

Cited By ~ 5

Author(s):

Cláudio Bresciani ◽

Joaquim Gama-Rodrigues ◽

Victor Strassmann ◽

Dan L. Waitzberg ◽

Mitsunori Matsuda ◽

...

Keyword(s):

Gastric Cancer ◽

Surgical Treatment ◽

Survival Rate ◽

Tnm Classification ◽

Controlled Study ◽

Hematological Toxicity ◽

Control Group ◽

Significant Difference ◽

The Impact

Several drugs and their associations are being used for adjuvant or complementary chemotherapy with the aim of improving results of gastric cancer treatment. The objective of this study was to verify the impact of these drugs on nutrition and on survival rate after radical treatment of 53 patients with gastric cancer in stage III of the TNM classification. A control group including 28 patients who had only undergone radical resection was compared to a group of 25 patients who underwent the same operative technique followed by adjuvant polychemotherapy with FAM (5-fluorouracil, Adriamycin, and mitomycin C). In this latter group, chemotherapy toxicity in relation to hepatic, renal, cardiologic, neurological, hematologic, gastrointestinal, and dermatological functions was also studied. There was no significant difference on admission between both groups in relation to gender, race, macroscopic tumoral type of tumor according to the Borrmann classification, location of the tumor in the stomach, length of the gastric resection, or response to cutaneous tests on delayed sensitivity. Chemotherapy was started on average, 2.3 months following surgical treatment. Clinical and laboratory follow-up of all patients continued for 5 years. The following conclusions were reached: 1) The nutritional status and incidence of gastrointestinal manifestation were similar in both groups; 2) There was no occurrence of cardiac, renal, neurological, or hepatic toxicity or death due to the chemotherapeutic method per se; 3) Dermatological alterations and hematological toxicity occurred exclusively in patients who underwent polychemotherapy; 4) There was no significant difference between the rate and site of tumoral recurrence, the disease-free interval, or the survival rate of both study groups; 5) Therefore, we concluded, after a 5-year follow-up, chemotherapy with the FAM regimen did not increase the survival rate.

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One-year clinical evaluation of IPS Empress CAD versus polished Celtra Duo ceramic Laminate veneers (randomized controlled clinical trial)

Brazilian Dental Science ◽

10.14295/bds.2021.v24i3.2595 ◽

2021 ◽

Vol 24 (3) ◽

pp. 13p

Author(s):

Hayat Elbanna ◽

Mohammed Labib Zamzam ◽

Jylan Fouad El-Guindy ◽

Ahmed Soliman Idris

Keyword(s):

Survival Rate ◽

Fracture Resistance ◽

Clinical Performance ◽

Control Group ◽

Marginal Adaptation ◽

Anterior Teeth ◽

Significant Difference ◽

One Year ◽

Laminate Veneers

Objective: To evaluate fracture resistance and survival rate of IPS Empress CAD versus Polished Celtra Duo ceramic laminate veneers. Material and Methods: Thirty-six ceramic laminate veneers were fabricated for maxillary anterior teeth. The patients were divided into two groups according to the material Group 1(control group) fabricated from IPS Empress CAD laminate veneers and group 2(intervention group) fabricated from Polished Celtra Duo laminate veneers. Standardized the same preparation with butt joint design and chamfer finish line located supra gingival were performed for all the teeth. The fabrication of the veneers was performed using Cad\Cam (Ceramill motion) machine, with software (Exocad). The veneers surfaces were treated and silanated according to the manufacture instruction of each ceramic and enamel surfaces were etched where total etch adhesive protocol was obeyed using BISCO. Follow up sessions were done every two months up to one year for each patient using dental probe and operator vision to evaluate the fracture, survival rate, marginal adaptation, sensitivity and caries. according to USPHS criteria (United States Public Health Service). This was performed by an experienced, blinded investigator. Results: Fracture resistance, marginal adaptation, retention, caries and sensitivity were evaluated according to the criteria of USPHS and we found there is no significant difference as both groups scaled zero score. Conclusion: Both IPS Empress Cad and Polished Celtra Duo laminate veneers revealed successful clinical performance in terms of fracture resistance, marginal adaptation, retention, and sensitivity after one year follow up period. Keywords Ceramic laminate veneers; IPS Empress CAD; Celtra DUO; Clinical performance.

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Digital versus Traditional Workflow for Posterior Maxillary Rehabilitations Supported by One Straight and One Tilted Implant: A 3-Year Prospective Comparative Study

BioMed Research International ◽

10.1155/2018/4149107 ◽

2018 ◽

Vol 2018 ◽

pp. 1-7 ◽

Cited By ~ 4

Author(s):

Francesco Ferrini ◽

Paolo Capparé ◽

Raffaele Vinci ◽

Enrico F. Gherlone ◽

Gianpaolo Sannino

Keyword(s):

Survival Rate ◽

Test Group ◽

Digital Impression ◽

Control Group ◽

Success Rates ◽

Marginal Bone Loss ◽

Digital Radiographs ◽

Posterior Maxilla ◽

Tilted Implant

Objectives. The aim of the study was to evaluate and compare digital and traditional prosthetic workflow for posterior maxillary restorations supported by an upright and a distally tilted implant at 3-year follow-up. Materials and Methods. Twenty-four patients were treated in the posterior maxilla with 24 immediately loaded axial and 24 distally tilted implants supporting 3-unit or 4-unit screw-retained prostheses. Three months after initial loading patients were randomly stratified into two groups: definitive traditional impressions were carried out in the control group, while digital impressions were performed in the test group. The framework-implant connection accuracy was evaluated by means intraoral digital radiographs at 3, 6, 12, and 36 months of follow-up examinations. Outcome considerations comprised implant and prosthetic survival and success rates, marginal bone level changes, and required clinical time to take impressions. Results. A total of 24 patients received immediately loaded screw-retained prostheses supported by an upright and a distally tilted implant (total 48 implants). No implant dropouts occurred, showing an overall survival rate of 100% for both groups. None of the 24 fixed prostheses were lost during the observation period (prosthetic survival rate of 100%). No statistically significant differences in marginal bone loss were found between control and test groups. The digital impression procedure required on average less clinical time than the conventional procedure. Conclusions. Clinical and radiologic results suggest that digital impression is a predictable procedure for posterior maxillary restorations supported by an upright and a distally tilted implant.

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The Short-term Clinical Performance of a Silorane-based Resin Composite in the Proximal Contacts of Class II Restorations

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-1132 ◽

2012 ◽

Vol 13 (3) ◽

pp. 251-256 ◽

Cited By ~ 4

Author(s):

Fabiana Santos Gonçalves ◽

Carolina Dolabela Leal Castro ◽

Audrey Cristina Bueno ◽

Amanda Beatriz Dadah Aniceto de Freitas ◽

Alysson Nogueira Moreira ◽

...

Keyword(s):

Clinical Performance ◽

Resin Composite ◽

Test Group ◽

Class Ii ◽

Control Group ◽

Rank Tests ◽

Short Term ◽

Signed Rank ◽

Significant Difference

ABSTRACT Aim The aim of this randomized clinical trial was to compare the proximal contact of a silorane-based resin composite with a conventional methacrylate-based resin composite in class II restorations after a 6 months follow-up period. Materials and methods After obtaining informed consent, 33 patients were randomly allocated into a test group (Filtek P90/Adhesive System-3M ESPE) or control group (Filtek P60/ Adper SE Plus-3M ESPE), and 100 direct resin composite restorations (n = 50) were placed. A single operator performed the cavities and restorations. After rubber dam placement, a metal matrix and wooden wedge were placed. The restorative systems were applied according to the manufacturer's instructions. After 1 week, the restorations were finished and polished. The proximal contacts were assessed blindly and independently by two calibrated examiners (kW = 0.8) at the baseline and after 6 months according to a three-step grading criteria. Data were analyzed with the Mann-Whitney U-test and Wilcoxon signed Rank tests (α = 0.05). Results: After 6 months, 96% of the restoration contacts were present for evaluation. The frequencies of restorations classified as Bravo in control and test groups were 6 and 8% at the baseline, and 6.25 and 12.75% after 6 months. No significant difference was found between the restorative materials (p > 0.05; Mann-Whitney U-test) neither between baseline and 6 months period (p > 0.05; Wilcoxon signed Rank tests). Conclusion Both materials performed satisfactorily over 6 months follow-up period. Clinical significance The short-term clinical performance of a silorane-based resin composite in the proximal contacts of class II restorations was similar to the well-known methacrylate-based resin composite. How to cite this article Gonçalves FS, Castro CDL, Bueno AC, de Freitas ABDA, Moreira AN, Magalhães CS. The Shortterm Clinical Performance of a Silorane-based Resin Composite in the Proximal Contacts of Class II Restorations. J Contemp Dent Pract 2012;13(3):251-256.

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