Mandibular bone characteristics, drilling protocols, and final insertion torque for titanium-zirconium mini-implants for overdentures : A cross-sectional analysis
© 2023 Wiley Periodicals LLC..
OBJECTIVE: The aim of this study was to assess the final insertion torque values achieved using site-specific drilling protocols for a novel mini implant system for removable complete overdentures. Anatomical and technical factors influencing final insertion torque were recorded and analyzed.
MATERIAL AND METHODS: Participants were randomized to two surgical protocol groups (flapped or flapless) and all received four mini implants (Straumann® mini implant system; Straumann AG) in the anterior mandible, using a 1.6 mm needle drill and a 2.2 mm pilot drill for the implant bed site preparation. The final insertion torque was recorded as the main outcome variable during surgery. Bone type, radiographical bone density, ridge form, implant length, and the drilling protocol were considered as independent variables. Descriptive statistics, generalized estimating equations (GEE) regression, and heatmap charts were used for data analyses.
RESULTS: A total of 296 mini implants were placed in 74 patients (mean age = 64.1 ± 8.0; 64.9% female) using flapless (n = 37) or flapped (n = 37) surgeries. Mean final insertion torque was 55.8 ± 18.4 Ncm (10.5% > 35 Ncm, 48.9% between 35 and 65 Ncm, and 40.6% > 65 Ncm). The needle drill was used in only 43.9% of the implant bed sites. Higher final torque values were observed for higher bone densities (bone type I > II > III, and D1-D2 > D3-D4), highly resorbed ridge forms (5-6 > 3-4), flapped surgeries, and male patients. However, regression models showed that the likelihood of achieving optimal insertion torque (≥35 and ≤65 Ncm) was higher for females (OR = 2.14; 95%CI = 1.14-4.01; p = 0.018), ridge forms 3-4 (OR = 2.87; 95%CI = 1.05-7.85; p = 0.040), and flapless surgeries (OR = 1.96; 95%CI = 1.09-3.51; p = 0.024).
CONCLUSIONS: Sufficient primary stability for immediate loading was achieved for the majority of the mini implants placed. Surgical implant bed preparation should be site-specific to achieve optimal primary stability for immediate loading while avoiding excessive insertion torque.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:25 |
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| Enthalten in: |
Clinical implant dentistry and related research - 25(2023), 2 vom: 01. Apr., Seite 426-434 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Leles, Cláudio Rodrigues [VerfasserIn] |
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| Links: |
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| Themen: |
C6V6S92N3C |
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| Anmerkungen: |
Date Completed 05.04.2023 Date Revised 05.04.2023 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1111/cid.13181 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM351345566 |
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| 100 | 1 | |a Leles, Cláudio Rodrigues |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Mandibular bone characteristics, drilling protocols, and final insertion torque for titanium-zirconium mini-implants for overdentures |b A cross-sectional analysis |
| 264 | 1 | |c 2023 | |
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| 500 | |a Date Completed 05.04.2023 | ||
| 500 | |a Date Revised 05.04.2023 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a © 2023 Wiley Periodicals LLC. | ||
| 520 | |a OBJECTIVE: The aim of this study was to assess the final insertion torque values achieved using site-specific drilling protocols for a novel mini implant system for removable complete overdentures. Anatomical and technical factors influencing final insertion torque were recorded and analyzed | ||
| 520 | |a MATERIAL AND METHODS: Participants were randomized to two surgical protocol groups (flapped or flapless) and all received four mini implants (Straumann® mini implant system; Straumann AG) in the anterior mandible, using a 1.6 mm needle drill and a 2.2 mm pilot drill for the implant bed site preparation. The final insertion torque was recorded as the main outcome variable during surgery. Bone type, radiographical bone density, ridge form, implant length, and the drilling protocol were considered as independent variables. Descriptive statistics, generalized estimating equations (GEE) regression, and heatmap charts were used for data analyses | ||
| 520 | |a RESULTS: A total of 296 mini implants were placed in 74 patients (mean age = 64.1 ± 8.0; 64.9% female) using flapless (n = 37) or flapped (n = 37) surgeries. Mean final insertion torque was 55.8 ± 18.4 Ncm (10.5% > 35 Ncm, 48.9% between 35 and 65 Ncm, and 40.6% > 65 Ncm). The needle drill was used in only 43.9% of the implant bed sites. Higher final torque values were observed for higher bone densities (bone type I > II > III, and D1-D2 > D3-D4), highly resorbed ridge forms (5-6 > 3-4), flapped surgeries, and male patients. However, regression models showed that the likelihood of achieving optimal insertion torque (≥35 and ≤65 Ncm) was higher for females (OR = 2.14; 95%CI = 1.14-4.01; p = 0.018), ridge forms 3-4 (OR = 2.87; 95%CI = 1.05-7.85; p = 0.040), and flapless surgeries (OR = 1.96; 95%CI = 1.09-3.51; p = 0.024) | ||
| 520 | |a CONCLUSIONS: Sufficient primary stability for immediate loading was achieved for the majority of the mini implants placed. Surgical implant bed preparation should be site-specific to achieve optimal primary stability for immediate loading while avoiding excessive insertion torque | ||
| 650 | 4 | |a Clinical Trial Protocol | |
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a clinical study | |
| 650 | 4 | |a dental implant | |
| 650 | 4 | |a edentulous mandible | |
| 650 | 4 | |a overdenture | |
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| 650 | 7 | |a Titanium |2 NLM | |
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| 700 | 1 | |a Leles, José Luiz Rodrigues |e verfasserin |4 aut | |
| 700 | 1 | |a Curado, Thalita Fernandes Fleury |e verfasserin |4 aut | |
| 700 | 1 | |a Silva, Jésio Rodrigues |e verfasserin |4 aut | |
| 700 | 1 | |a Nascimento, Lays Noleto |e verfasserin |4 aut | |
| 700 | 1 | |a de Paula, Marcella Silva |e verfasserin |4 aut | |
| 700 | 1 | |a Maniewicz, Sabrina |e verfasserin |4 aut | |
| 700 | 1 | |a Schimmel, Martin |e verfasserin |4 aut | |
| 700 | 1 | |a McKenna, Gerald |e verfasserin |4 aut | |
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