Occlusal status of implant superstructures at mandibular first molar immediately after setting

Okada, Yukihiko; Sato, Yuji; Kitagawa, Noboru; Uchida, Keiichiro; Osawa, Tsutomu; Imamura, Yoshiki; Terazawa, Mayumi

doi:10.1186/s40729-015-0016-0

Cited by 7 publications

(4 citation statements)

References 14 publications

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“…Static load of 400N was applied on the prosthesis using universal testing machine. [ 13 14 15 16 ] Load application was done ten times for each model and peri implant strain was measured. Hence the objective of this study was to find out compare the peri implant strain in four different types of prosthesis i.e., splinted cement retained, non splinted cement retained, splinted screw retained, non splinted screw retained.…”

Section: Discussionmentioning

confidence: 99%

“…A static load of 400 N was applied on each prosthesis for a period of 10 seconds using universal testing machine [Figures 7 and 8 ]. [ 4 ] The load of 400 N was selected because in healthy, dentulous subjects, the total occlusal force in the molar region at maximum clenching strength was reported to be 400 N.[ 13 14 15 16 ] Load application was done ten times for each model and peri implant strain was measured in each strain gauge.…”

Section: Methodsmentioning

confidence: 99%

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A comparison of peri-implant strain generated by different types of implant supported prostheses

Rani

Shetty

Reddy

2017

J Indian Prosthodont Soc

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Aims and Objective:To find out and compare peri implant strain developed in four different types of implant supported prostheses i.e., cement retained splinted, cement retained non splinted, screw retained splinted, screw retained non splinted.Methodology:Four implant analogues were placed in a polyurethane mandibular model at the position of left and right first and second molar. Abutments were fixed to the implant at a torque of 25Ncm. Two such models were made. Four different prostheses were placed on abutment of each model i.e screw retained splinted, screw retained nonsplinted, cement retained splinted, cement retained non splinted. Four strain gauges were attached on the model, two on the buccal and two on the lingual aspect of each implant. Static load of 400N was applied on the prosthesis using universal testing machine. Load application was done ten times for each model and peri implant strain was measured.Results:The mean peri implant strain (±SD) generated was found to be highest in non-splinted screw retained (1397.70 ± 44.47 microstrains and 1265.90 ± 42.76 microstrains) and least in splinted cement retained (630.70 ± 31.98 microstrains and 519.60 ± 32.48 microstrains) in both 1st and 2nd molars respectively.Conclusions:Splinted crowns produce less peri implant strain when compared to non splinted crowns. Cement retained prosthesis produce less peri implant strain when compared to screw retained prosthesis. Least strain was observed in cement retained splinted crowns.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

A comparison of peri-implant strain generated by different types of implant supported prostheses

Rani

Shetty

Reddy

2017

J Indian Prosthodont Soc

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“…However, immediately loaded implant was associated with a higher incidence of implant failure compared to conventional delay loaded implant [ 23 ]. Occlusal contact on the implant superstructures is a crucial factor for successful immediately loaded implant therapy [ 24 ]. Moreover, nature masticatory forces can load on implants in different directions [ 13 ].…”

Section: Discussionmentioning

confidence: 99%

Effects of immediate loading directionality on the mechanical sensing protein PIEZO1 expression and early-stage healing process of peri-implant bone

Mao,

Yu,

et al. 2024

BioMed Eng OnLine

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Background The reduced treatment time of dental implants with immediate loading protocol is an appealing solution for dentists and patients. However, there remains a significant risk of early peri-implant bone response following the placement of immediately loaded implants, and limited information is available regarding loading directions and the associated in vivo characteristics of peri-implant bone during the early stages. This study aimed to investigate the effects of immediate loading directionality on the expression of mechanical sensing protein PIEZO1 and the healing process of peri-implant bone in the early stage. Methods Thirty-two implants were inserted into the goat iliac crest models with 10 N static lateral immediate loading applied, followed by histological, histomorphological, immunohistochemical, X-ray microscopy and energy dispersive X-ray spectroscopy evaluations conducted after 10 days. Results From evaluations at the cellular, tissue, and organ levels, it was observed that the expression of mechanical sensing protein PIEZO1 in peri-implant bone was significantly higher in the compressive side compared to the tensile side. This finding coincided with trends observed in interfacial bone extracellular matrix (ECM) contact percentage, bone mass, and new bone formation. Conclusions This study provides a novel insight into the immediate loading directionality as a potential influence factor for dental implant treatments by demonstrating differential effects on the mechanical sensing protein PIEZO1 expression and related early-stage healing processes of peri-implant bone. Immediate loading directions serve as potential therapeutic influence factors for peri-implant bone during its early healing stage.

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“…Total chewing force and swallowing forces have been reported to be at 100 N, 39 and occlusal force reported to the first molar has been reported at 130 N. 40,41 The restorations received 200,000 cyclic load and then loaded until fracture, and the results displayed for surveyed crowns with no rest seat (4238 N), surveyed crowns with disto-occlusal rest seat (3257 N), surveyed crowns with disto-occlusal extended rest seat (3283 N), surveyed crowns with interproximal rest seat (2723 N), and surveyed crowns with continuous rest seat (3601 N.) all displayed significantly higher resistance that natural occlusal forces for natural dentition. Therefore, all types of chairside zirconia survey crown display clinically acceptable values.…”

Section: Discussionmentioning

confidence: 99%

Fracture resistance of zirconia surveyed crowns with four different occlusal rest seat designs

Jurado

Ahmed

Lawson

et al. 2023

Journal of Prosthodontics

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PurposeTo determine the fracture resistance of chairside computer‐aided design and computer‐aided manufacturing (CAD‐CAM) zirconia surveyed crowns for a mandibular first molar without occlusal rest and with four different rest seat designs.Materials and MethodsSeventy CAD‐CAM zirconia 4Y‐PSZ (IPS e.max ZirCAD MT for CEREC A1, C15, Ivoclar Vivadent) crowns (14 specimens/group) were designed and fabricated with a dental chairside CAD‐CAM system (CEREC PrimeScan, and CEREC MCXL Dentsply Sirona). The restorations were divided into groups according to the following rest seat designs: (1) Surveyed crown without rest seat, (2) surveyed crowns with disto‐occlusal rest seat, (3) surveyed crowns with disto‐occlusal extended rest seat, (4) surveyed crowns with interproximal rest seat, and (5) continuous rest seat. Crowns were treated with a primer system (Monobond Plus, Ivoclar Vivadent) and cemented using resin luting cement (Multilink Automix, Ivoclar Vivadent) to resin‐printed dies (Grey Resin V4, FormLabs). Subsequently, the crowns were subjected to 200,000 load cycles at 1 Hz with 20 N force and then loaded with a steel indenter until fracture. The test results were analyzed with one‐way Analysis of Variance (ANOVA) and HSD Tukey post‐Hoc test.ResultsThe mean fracture resistance of surveyed crowns without and with different rest seats was significantly different from each other. Surveyed crowns with no rest seat displayed the highest resistance (4238 N) followed by crowns with continuous rest seat (3601 N), crowns with disto‐occlusal extended rest seat (3283 N), and crowns with disto‐occlusal rest seat (3257 N). Crowns with interproximal rest seat displayed the lowest fracture resistance (2723 N).ConclusionsSurveyed crowns without rest seats had a higher fracture resistance than crowns with rest seats Surveyed crowns with interproximal rest seats presented the lowest fracture resistance among all rest seat designs. Crowns with disto‐occlusal rest seats, disto‐occlusal extended rest seats, and continuous rest seats displayed similar fracture resistance.

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Occlusal status of implant superstructures at mandibular first molar immediately after setting

Cited by 7 publications

References 14 publications

A comparison of peri-implant strain generated by different types of implant supported prostheses

A comparison of peri-implant strain generated by different types of implant supported prostheses

Effects of immediate loading directionality on the mechanical sensing protein PIEZO1 expression and early-stage healing process of peri-implant bone

Fracture resistance of zirconia surveyed crowns with four different occlusal rest seat designs

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