Dataset Information

Virtual Implant Rehabilitation of the Severely Atrophic Maxilla: A Radiographic Study.

ABSTRACT: BACKGROUND:Advanced maxillary atrophy is one of the most common clinical scenarios where implant placement could become difficult. Nevertheless, a volumetric evaluation using a suitable diagnostic software could facilitate the implant planning. The purpose of the present study is to suggest the potential application of the maxillary retro-canine area as the designated location for virtual tilted implants. METHODS:A sample of Cone Beam Computed Tomography (CBCT) images from the Department of Dentistry (IRCSS San Raffaele, Milan, Italy) was evaluated. After a 3D anatomical evaluation, tilted implants were virtually positioned in the retro-canine regions. All the implants were inserted using the same procedure at 30° and 45° degrees of tilting. The length, palatal angulation and diameter of the placed implant were identified. RESULTS:A total of 220 tilted implants were placed. An average implant measurement of 13.51 mm in length and 3.42 mm in diameter were calculated. Additionally, an average buccal-palatal angulation of 6° was identified. Upon statistical analysis, the implant length was found to be significantly higher at 45° degrees of mesio-distal angulation than at 30° degrees (<0.0001). CONCLUSIONS:A considerable number of patients show a significant degree of bone atrophy. The implant-supported treatment plan can rely on three-dimensional imaging of the residual bone as a guiding tool to establish the most effective implant position for each specific case. In this study, it was found that an implant could have a greater length if its mesio-distal angulation was more accentuated. In addition, owing to the volumetric evaluation, it was possible to virtually insert tilted implants in almost all of the cases of atrophy. This could lead clinicians to consider the retro-canine area as a viable place to insert a longer tilted implant.

SUBMITTER: Manacorda M

PROVIDER: S-EPMC7148484 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature

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Virtual Implant Rehabilitation of the Severely Atrophic Maxilla: A Radiographic Study.

Manacorda Michele M Poletti de Chaurand Bianca B Merlone Alberto A Tetè Giulia G Mottola Francesca F Vinci Raffaele R

Dentistry journal 20200202 1

<h4>Background</h4>Advanced maxillary atrophy is one of the most common clinical scenarios where implant placement could become difficult. Nevertheless, a volumetric evaluation using a suitable diagnostic software could facilitate the implant planning. The purpose of the present study is to suggest the potential application of the maxillary retro-canine area as the designated location for virtual tilted implants.<h4>Methods</h4>A sample of Cone Beam Computed Tomography (CBCT) images from the Dep ...[more]

PMID: 32024286

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Project description:ObjectivesTo compare the use of short implants (?6?mm) in atrophic posterior maxilla versus longer implants (?10?mm) with sinus floor elevation.DesignA systematic review and meta-analysis based on randomised controlled trials (RCTs).Data sourcesElectronic searches were conducted in PubMed, Embase and the Cochrane CENTRAL. Retrospective and prospective hand searches were also performed.Eligibility criteriaRCTs comparing short implants (?6?mm) and longer implants (?10?mm) with sinus floor elevation were included. Outcome measures included implant survival (primary outcome), marginal bone loss (MBL), complications and patient satisfaction.Data extraction and synthesisRisks of bias in and across studies were evaluated. Meta-analysis, subgroup analysis and sensitivity analysis were undertaken. Quality of evidence was assessed according to Grading of Recommendations Assessment, Development and Evaluation.ResultsA total of seven RCTs involving 310 participants were included. No significant difference in survival rate was found for 1-3?years follow-up (RR 1.01, 95%?CI 0.97 to 1.04, p=0.74, I²=0%, moderate-quality evidence) or for 3?years or longer follow-up (RR 1.00, 95%?CI 0.97 to 1.04, p=0.79, I²=0%, moderate-quality evidence). However, short implants (?6?mm) showed significantly less MBL in 1-3?years follow-up (MD=-0.13?mm, 95%?CI -0.21 to 0.05; p=0.001, I²=87%, low-quality evidence) and in 3?years or longer follow-up (MD=-0.25?mm, 95%?CI -0.40 to 0.10; p=0.001, I²=0%, moderate-quality evidence). In addition, short implant (?6?mm) resulted in fewer postsurgery reaction (RR 0.11, 95%?CI 0.14 to 0.31, p<0.001, I²=40%, moderate-quality evidence) and sinus perforation or infection (RR 0.11, 95%?CI 0.02 to 0.63, p=0.01, I²=0%, moderate-quality evidence).ConclusionsFor atrophic posterior maxilla, short implants (?6?mm) are a promising alternative to sinus floor elevation, with comparable survival rate, less MBL and postsurgery reactions. Additional high-quality studies are needed to evaluate the long-term effectiveness of short implants (?6?mm).Trial registeration numberThe protocol has been registered at PROSPERO (CRD42018103531).

Dataset Information

Virtual Implant Rehabilitation of the Severely Atrophic Maxilla: A Radiographic Study.

Publications

Virtual Implant Rehabilitation of the Severely Atrophic Maxilla: A Radiographic Study.

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