An auxiliary factor for increasing the retention of short abutments
| Autor: | Anas Jaber, Issam Jamous, Rami M. Alaisami, Fendi AlShaarani, Kanaan Elias, Loai Aljerf |
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| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Molar Quality of life Chamfer Materials science Dental materials Base (geometry) Abutment Oral medicine Pull off test Article 03 medical and health sciences 0302 clinical medicine Groove lcsh:Social sciences (General) lcsh:Science (General) Groove (music) Orthodontics Cast crown Frustum Multidisciplinary Occupational health Tooth preparation Short crown 030104 developmental biology Prosthetic dentistry Metal protrusion Retention Dentistry lcsh:H1-99 Cement key Biomedical engineering 030217 neurology & neurosurgery Zinc Phosphate Cement lcsh:Q1-390 Biotechnology |
| Zdroj: | Heliyon Heliyon, Vol 5, Iss 10, Pp e02674-(2019) |
| ISSN: | 2405-8440 |
| Popis: | Background Retention is an essential factor in the sustainability of the prosthesis, especially for short abutment. Despite, the availability of several auxiliary applications, achieving a clinically good retention for cast crowns in prepared short teeth remains a major challenge for the practicing dentist. Objectives This study tests a new method for applying frustum-shaped grooves on short prepared abutments and compares them with traditional setting grooves. Methods Forty-eight copper machine-milled short dies with 3.5 mm length and 12o conversion with a chamfer finish line of 0.7 mm were prepared to mimic short prepared molars and distributed into 4 groups. A control group with two opposing setting grooves and two groups with dual opposing frustums, one of which was prepared to receive two integrated metal protrusions inside the casting that fit the frustums. Frustums were prepared with Komet bur No. 807 with dimensions 0.9 mm at the base and 0.7 mm at the occlusal surface. A direct wax-up was carried out on all dies and all castings were cemented with zinc phosphate cement. A pull-off test was applied until separation. Data were analysed to compare the correlation of the four groups using one-way ANOVA and Bonferroni test (p ≤ 0.05). Results The mean retentive values in Newton were as follows: the control group, 457.80; the setting grooves group, 461.07; the frustum group, 597.59; and the frustum group with the two metal protrusions, 919.80. The retention was increased by 65% in frustum group and doubled in frustum group with the metal protrusions. Conclusions The results showed a statistical significance in retention in the frustum groups with and without metal protrusion over the retention of the control and the setting grooves groups. Biomedical engineering; Biotechnology; Dentistry; Quality of life; Occupational health; Dental materials; Oral medicine; Prosthetic dentistry; Retention; Abutment; Cast crown; Frustum; Groove; Metal protrusion; Tooth preparation; Cement key; Short crown; Pull off test |
| Databáze: | OpenAIRE |
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