In Vitro Simulation of Dental Implant Bridges Removal: Influence of Luting Agent and Abutments Geometry on Retrievability

Lugas, Andrea T.; Terzini, Mara; Zanetti, Elisabetta M.; Manzella, Carlo; Baldi, Domenico; Bignardi, Cristina; Audenino, Alberto

doi:10.3390/ma13122797

Cited by 10 publications

(10 citation statements)

References 33 publications

(45 reference statements)

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“…The best retrievability was obtained with long, slightly tapered abutments and when the prosthesis is cemented with temporary luting agent. 11 A choice of ceramic veneer or direct composite build-up was discussed with the patient for masking the root of 22 due to the gingival recession. The gingival recession could have been caused by a combination of factors which include labial bone dehiscence related to orthodontic movement of teeth with the fixed appliance and the surgical flap manipulation during the first stage implant surgery.…”

Section: Discussionmentioning

confidence: 99%

A Rehabilitation of Missing Maxillary Anterior Teeth in a Severe Skeletal Class III Malocclusion Patient Requiring Implants

Kassim

Hamid

Ghazali

et al. 2021

ADUM

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Management of traumatic dental injuries (TDI) in a young patient may range from simple to complex. In a situation where teeth are lost, a reliable and conservative treatment option is an implant-supported fixed dental prosthesis (i-FDP), as this treatment option negates the need to prepare sound abutment teeth as in the case of conventional fixed bridges. However, the placement of implants is usually prosthetically driven to allow for a 3D functional and aesthetic restoration. In the presence of severe skeletal Class III malocclusion, treatment may incorporate pre-surgical orthodontic treatment, followed by jaw surgery to correct the skeletal discrepancies and finally post-surgical orthodontic treatment before the rehabilitation with implants. A multidisciplinary treatment approach in a stepwise manner is required to address the patient’s overall treatment needs. This case report presents a joint prosthodontics, orthodontics and oral maxillofacial surgical management of a young adult male patient with a Skeletal Class III malocclusion who required rehabilitation of avulsed missing anterior teeth sustained from childhood TDI. The severity of the skeletal relationship required a Le Fort I maxillary advancement and a bilateral sagittal split osteotomy for the setback of the mandible in combination with orthodontics for correction of malocclusion and arch relationship prior to implant placement. Correction of the malocclusion and jaw deformity allowed the functional and aesthetic rehabilitation of the missing teeth using an i-FDP.

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Section: Discussionmentioning

confidence: 99%

A Rehabilitation of Missing Maxillary Anterior Teeth in a Severe Skeletal Class III Malocclusion Patient Requiring Implants

Kassim

Hamid

Ghazali

et al. 2021

ADUM

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“…Lugas et al 20 studied the in uence of abutment geometry on the force needed for crown retrieval which ranged from 220 to 350 N. Based on comparison of means, sample size was calculated to be 6 per group and increased to 7 to make up for laboratory processing errors. 21 To ensure adequate power, post-hoc power was computed based on the dislodgement force at different angulations and the reported power was 98.7% (G*Power Version 3.1.9.4).…”

Section: Methodsmentioning

confidence: 99%

Evaluation of the Dislodgement Force of Splinted Restorations with Engaging Conical Abutments over Multiple Nonparallel Implants (In-Vitro Study)

Khamis

Zakaria

Farrag

et al. 2023

Preprint

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Background The use of engaging abutments with splinted cement retained restorations with screw access channels is essential to maintain abutment orientation. The purpose of this in vitro study was to determine the maximum degree of divergence between 2 adjacent implants with conical connections that allows insertion and removal of a splinted screw-retained restoration with engaging preparable abutments or titanium base abutments. Methods Two implants were aligned in a stone base, one straight and the other at an angle ranging from 0–20 degrees. The implants represented an implant system that had an internal conical connection and a hexed abutment engaging the base of the connection. Two straight preparable engaging cement retained abutments were screwed onto the implants and splinted together using acrylic resin. A total of 11 angles were tested, with 7 specimens for every angle. Evaluation of dislodging force was performed by pulling out the splinted abutments after unscrewing them. This was performed subjectively by 3 blinded investigators who applied a tactile pulling force. A scale of 0–10 was used to estimate the pulling force. Objectively the dislodging force was measured in Newtons using a universal testing machine. A statistical correlation was made between the subjective and objective dislodging force values using Spearman’s rank correlation coefficient. Results The mean subjective values increased gradually from 0 to 16 degrees. A sudden rise was noticed at 18 degrees (9.71 ± 0.23) and, at 20 degrees, the investigators were not able to remove the splinted abutments from the implants. The mean objective dislodgement force values increased gradually from 0 to16 degrees and abruptly from 16 degrees (13.57 ± 0.45 N) to 18 degrees (25.40 ± 0.66 N) and 20 degrees (35.22 ± 0.64). The correlation between the subjective and the objective evaluations assessed using the Spearman’s rank correlation coefficient was 0.98 indicating a statistically significant correlation (P < .001). As the objective dislodging force increased, the subjective dislodgement difficulty increased. Conclusions Splinting cement retained restorations with screw access channels on engaging abutments is possible when multiple implants with conical connections having an internal flare angle of 8 degrees are used, with implant divergence of up to 16 degrees.

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“…Implant-retained dental prostheses are a widely used treatment for edentulous patients [1][2][3][4][5], and dental implants of different length and diameter are indicated for different defects or conditions. However, sometimes the edentulous crest does not have sufficient bone for a correct implant insertion [6].…”

Section: Introductionmentioning

confidence: 99%

Digital Image Correlation analysis on the bone displacement during split crest: an ex vivo study

Lugas

Terzini²,

Stacchi³

et al. 2022

J. Phys.: Conf. Ser.

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The split crest is an established surgical technique for horizontal bone augmentation. It allows to place implants of adequate diameter in sites where the bone would be too thin for the implantation. In this study, two split crest techniques (using threaded bone expanders or ultrasonic bone surgery) were performed ex vivo on bovine ribs, and dental implants were then inserted in the so prepared implantation sites. Digital image correlation was used to measure the bone external surface displacement throughout the surgical procedures. Both techniques provided an adequate bone volume for implant insertion, and no significant differences were highlighted regarding the displacement. However, bone accidental fracture only occurred during split crest with threaded bone expanders, suggesting differences in the internal strain distribution induced by the two techniques.

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In Vitro Simulation of Dental Implant Bridges Removal: Influence of Luting Agent and Abutments Geometry on Retrievability

Cited by 10 publications

References 33 publications

A Rehabilitation of Missing Maxillary Anterior Teeth in a Severe Skeletal Class III Malocclusion Patient Requiring Implants

A Rehabilitation of Missing Maxillary Anterior Teeth in a Severe Skeletal Class III Malocclusion Patient Requiring Implants

Evaluation of the Dislodgement Force of Splinted Restorations with Engaging Conical Abutments over Multiple Nonparallel Implants (In-Vitro Study)

Digital Image Correlation analysis on the bone displacement during split crest: an ex vivo study

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