scholarly journals Post-insertion Posterior Single-implant Occlusion Changes at Different Intervals: A T-Scan Computerized Occlusal Analysis

2017 ◽  
Vol 18 (10) ◽  
pp. 927-932 ◽  
Author(s):  
Azam S Madani ◽  
Mohammadreza Nakhaei ◽  
Malihe Alami ◽  
Hamidreza Rajati Haghi ◽  
Saied Mostafa Moazzami
Keyword(s):  
Cohort Study ◽  
Friedman Test ◽  
Occlusal Force ◽  
Occlusal Adjustment ◽  
Metal Ceramic ◽  
Ceramic Crowns ◽  
Natural Dentition ◽  
Post Hoc ◽  
Single Implant

ABSTRACT Aim The aim of this prospective cohort study was to evaluate the postinsertion posterior single-implant occlusion changes at 3- and 6-month intervals using T-Scan computerized occlusal analysis. Materials and methods A total of 21 patients received single implant, opposed by natural dentition, in posterior regions of the maxilla or mandible (13 premolar, 8 molar) and were finally restored with cemented-retained metal–ceramic crowns. The occlusal contacts were equilibrated according to the implantprotective occlusion concept to develop light contact with heavy occlusion and no contact with light occlusion in maximum intercuspation. The percentage of force applied to the implant crowns (POFI) and contralateral teeth (POFT) was evaluated using T-Scan computerized occlusal analysis at prosthesis insertion, 3- and 6-month follow-up appointments. The data were statistically analyzed using Friedman test and Wilcoxon post hoc test (α = 0.05). Results The POFI values at the 6- and 3-month follow-up appointments were significantly higher than those at prostheses insertion (p = 0.001 and p = 0.005 respectively). In addition, there were significant differences between the POFI at 3- and 6-month follow-up (p = 0.020). However, the POFT values at 3- and 6-month follow-up appointments were significantly lower than those at baseline (p<0.001). Conclusion The intensity of occlusal contacts of implantsupported prostheses opposed by natural dentition increased after prosthesis insertion. Placement of single posterior implant-supported restoration decreased the percentage of occlusal force applied to contralateral arch. Clinical significance A periodic occlusal adjustment of implant-supported prostheses is necessary to prevent potential overloading from the movement of opposing natural dentition. How to cite this article Madani AS, Nakhaei M, Alami M, Haghi HR, Moazzami SM. Post-insertion Posterior Singleimplant Occlusion Changes at Different Intervals: A T-Scan Computerized Occlusal Analysis. J Contemp Dent Pract 2017;18(10):927-932.

Implant-Supported Prosthesis Misalignment Related to the Dental Arch: A 14-Year Clinical Follow-up

2012 ◽  
Vol 38 (4) ◽  
pp. 399-404
Author(s):  
Flávio Domingues das Neves ◽  
Vitor Coró ◽  
João Paulo da Silva Neto ◽  
Ivete Aparecida de Mattias Sartori ◽  
Ricardo Alves do Prado
Keyword(s):  
Genetic Factors ◽  
Clinical Analysis ◽  
Dental Arch ◽  
Occlusal Adjustment ◽  
Metal Ceramic ◽  
Natural Movement ◽  
Natural Teeth ◽  
Ceramic Crowns ◽  
Periodontal Ligaments

The purpose of this study was to warn the dental community about a possible problem in function with partial implant–supported prostheses used for long periods. The misalignment between natural teeth and the implant-supported prosthesis on teeth 11 and 12, observed in a 14-year clinical follow-up, illustrates the fact. The metal-ceramic crowns were placed in 1995 after a rigorous occlusal adjustment. Evaluations were made at 4, 6, 9, and 14 years, when it was noticed that the restorations were positioned palatally and extruded in comparison with the natural teeth. After 9 years, a greater discrepancy was noticed, with anterior occlusion and esthetic changes. The possible causes have been discussed: occlusal problems, parafunctional habits, and natural movement. The first 2 options were discarded after clinical analysis and diagnosis. Therefore, the natural movement probably deriving from an interaction of mechanical and genetic factors might have been the cause. The implants do not have periodontal ligaments but rather ankylosis, so they do not suffer those movements. This case emphasizes the need to inform patients that implants can last more than 10 years in function, but this is not the case with restorations, which lose function and esthetics and must be replaced.

scholarly journals Recurrent mechanical complications in an implant-supported fixed complete denture: a clinical report

2018 ◽  
Vol 33 (1) ◽  
pp. 98
Author(s):  
Maria Paula De Lima Coltro ◽  
Thaisa Barizan Bordin ◽  
Luciano Costa Petri ◽  
Ahmet Ozkomur ◽  
Rosemary Sadami Arai Shinkai
Keyword(s):  
Clinical Case ◽  
Clinical Report ◽  
Complete Dentures ◽  
Case Description ◽  
Causal Interaction ◽  
Occlusal Force ◽  
Occlusal Adjustment ◽  
Mechanical Complications ◽  
Framework Design

INTRODUCTION: Several factors can lead to mechanical complications in implant-supported fixed complete dentures (IFCD).CASE DESCRIPTION: This clinical report presents a clinical case of a maxillary IFCDP with recurrent mechanical complications and a possible causal interaction between patient’s intrinsic characteristics (bruxism and high occlusal force) and technical procedures (framework design, occlusal adjustment, interocclusal splint, and posterior occlusal support).CONCLUSION: The 3-year follow-up findings highlight the need for a comprehensive and systemic approach to manage a challenging case of an IFCD patient with moderate bruxism and high occlusal force.

scholarly journals Influence of Cusp Inclination and Type of Retention on Fracture Load of Implant-Supported Crowns

2017 ◽  
Vol 28 (1) ◽  
pp. 92-96
Author(s):  
Cibele Oliveira de Melo Rocha ◽  
Diogo Longhini ◽  
Rodrigo de Paula Pereira ◽  
João Neudenir Arioli Filho
Keyword(s):  
Testing Machine ◽  
Fracture Load ◽  
Second Molar ◽  
Significant Difference ◽  
Metal Ceramic ◽  
Mandibular Second Molar ◽  
Ceramic Crowns ◽  
Post Hoc ◽  
Single Crowns ◽  
Supported Metal

Abstract There are few informations about the influence of cusp inclination on the fracture strength of implant-supported crowns. The study aimed to evaluate the influence of cusp inclination and retention type on fracture load in implant-supported metal-ceramic single crowns. Sixty crowns were made, classified as cemented and screw-retained with screw access hole (SAH) sealed or not. Standard (33°) and reduced (20°) cusp inclinations were tested for each group (n=10). To support crowns of a mandibular second molar, analogs of external hexagon implants 5.0 were used. The fracture load was measured in a universal testing machine EMIC DL2000 (10 kN load cell; 0.5 mm/min). Two-way ANOVA (retention and cusp inclination) followed by post hoc Tukey’s honest significant difference test was used for the statistical analyses (a=0.05). Crowns with reduced cusp inclination exhibited significantly higher fracture load (p<0.01) than crowns with standard cusp inclination. Cemented crowns showed significantly higher fracture load (p<0.01) than screw-retained crowns. The interaction among these factors was not significant (p>0.05) for the fracture load. The sealing of SAH did not influence the fracture load of screw-retained crowns (p>0.05). In conclusion, fracture load of implant-supported metal-ceramic crowns was influenced by retention and cusp inclination, and there was no influence of the sealing of SAH.

Effect of Platelet-Rich Plasma on the Outcome of Early Loaded Dental Implants: A 3-Year Follow-up Study

2013 ◽  
Vol 39 (S1) ◽  
pp. 256-263 ◽  
Author(s):  
Gulfem Ergun ◽  
Ferhan Egilmez ◽  
Isil Cekic-Nagas ◽  
İnci Rana Karaca ◽  
Suleyman Bozkaya
Keyword(s):  
Clinical Effect ◽  
Platelet Rich Plasma ◽  
Resonance Frequency Analysis ◽  
Implant Stability ◽  
Median Line ◽  
Implant Stability Quotient ◽  
Metal Ceramic ◽  
Ceramic Crowns ◽  
Prosthetic Complications

This study evaluated the effect of local application of platelet-rich plasma (PRP) on the outcome of early loaded implants. Two implants were placed in the posterior region or bilaterally symmetric to the median line of the maxilla. Then, PRP was either applied or not applied to the implant sockets. Outcome measures were prosthesis and implant success as well as biological and prosthetic complications. Stability of individual implants was assessed manually and with a resonance frequency analysis device. The implant stability quotient (ISQ) was recorded on the operation day, on postoperative day 4, and at postoperative week 1. At the end of the first postoperative week, implants with ISQ values &gt;60 were early loaded on day 7 with metal-ceramic crowns. Measurements were repeated at postoperative weeks 2, 3, and 4 and at postoperative months 6, 12, 24, and 36. One of the 64 implants was dropped out after 3 months of loading. No prosthesis failed. There were no prosthetic complications. Statistical analysis revealed significant differences between ISQ values of PRP and non-PRP implants on the operation day. Moreover, no statistically significant differences were found between ISQ values of PRP and non-PRP implants in the follow-up periods (P &gt; .05). No appreciable clinical effect was observed when using PRP in the maxilla.

scholarly journals Changes in Corneal Topography and Clinical Refraction Following Horizontal Rectus Muscle Surgery

2020 ◽  
Vol 54 (5) ◽  
Author(s):  
Marie Jeazelle H. Redondo ◽  
Alvina Pauline D. Santiago ◽  
Ivo John S. Dualan
Keyword(s):  
Rectus Muscle ◽  
Study Groups ◽  
Corneal Topography ◽  
Spherical Equivalent ◽  
Friedman Test ◽  
Post Hoc Analysis ◽  
Significant Difference ◽  
Time Periods ◽  
Post Hoc

Objectives. Refractive changes have been studied after muscle surgery in literature but most results are inconsistent.It has been postulated that changes in corneal tension after muscle surgery may cause a change in corneal curvatureresulting in the change in refraction postoperatively. This study investigated changes in corneal topography andclinical refraction after horizontal rectus muscle surgery. Methods. Twenty-one eyes of 13 patients underwent horizontal rectus muscle surgery via limbal approach. Manifestrefraction, cycloplegic refraction, and corneal topography were measured preoperatively, and postoperatively at day 1and weeks 1, 2, 4 and 8. The proportion of subjects with at least 0.5 D change from preoperative measurements and the proportion of subjects that needed new prescription postoperative were also computed. Analysis of the results were done using the Friedman test to identify significant differences among measurements at different time periods with post-hoc analysis utilized to identify specific time periods with significant changes from preoperative measurements. Results. Mean corneal keratometry, horizontal, vertical, and oblique astigmatism, obtained topographically showed nosignificant difference from preoperative measurements. The statistically significant difference in corneal astigmatismin the recession group at day 1, week 4 and week 8 postoperatively was not confirmed when converted to powervectors in both vertical/horizontal (J0) and oblique (J45) astigmatism. Clinical refraction showed a transient myopicshift in spherical equivalent, statistically significant only on postoperative day 1 in the recession group. There was nostatistically significant difference in clinical astigmatism. There was ≥ 0.5 D change in spherical equivalent in 60% inboth study groups by the end of follow-up. The shift in J0 was more than 10% in the recession group. More than fiftypercent (52.4%) needed new prescription for glasses. Conclusion. No statistically significant change in corneal topography and clinical refraction following horizontal rectusmuscle surgery were found. Patients should still be refracted at least 2 weeks postoperatively to check if there is aneed for change in prescription glasses to improve alignment and/or improve vision.

Complications and survival rates of 55 metal-ceramic implant-supported fixed complete-arch prostheses: A cohort study with mean 5-year follow-up

2019 ◽  
Vol 122 (5) ◽  
pp. 441-449 ◽  
Author(s):  
Panos Papaspyridakos ◽  
Thaisa Barizan Bordin ◽  
Zuhair S. Natto ◽  
Khaled El-Rafie ◽  
Sarah E. Pagni ◽  
...  
Keyword(s):  
Cohort Study ◽  
Survival Rates ◽  
Metal Ceramic ◽  
Ceramic Implant
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