scholarly journals Five Degree Internal Conical Connection and Marginal Bone Stability around Subcrestal Implants: A Retrospective Analysis

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3123
Author(s):  
Diego Lops ◽  
Michele Stocchero ◽  
Jason Motta Jones ◽  
Alessandro Freni ◽  
Antonino Palazzolo ◽  
...  
Keyword(s):  
Clinical Evidence ◽  
Multiple Regression Model ◽  
Vertical Position ◽  
Limited Information ◽  
Conical Connection ◽  
Bone Level ◽  
Platform Switching ◽  
Marginal Bone Level

Background: There is limited information on the effect of the connection between subcrestally placed implants and abutments on marginal bone levels. The aim of the present retrospective study was to evaluate marginal bone levels after definitive prosthesis delivery around implants with an internal 5° conical connection placed in a subcrestal position. Materials and methods: Patients treated with fixed prostheses supported by implants placed at a subcrestal level between 2012 and 2018 were recalled for a follow-up examination. All implants had 5° internal conical connection with platform switching. Radiographic marginal bone level (MBL) was measured. MBL change between prosthetic delivery (t0) and follow-up examination (t1) was calculated. A multiple regression model was performed to identify the most significant predictors on MBL change. Results: Ninety-three patients and 410 implants, with a mean follow-up of 2.72 ± 1.31 years, were examined. Mean MBL was −1.09 ± 0.65 mm and −1.00 ± 0.37 mm at t0 and t1, respectively, with a mean bone remodeling of 0.09 ± 0.68 mm. An implant’s vertical position in relation to the bone crest, the year of follow up and the presence of type-2 controlled diabetes were demonstrated to be influencing factors for MBL modifications. Conclusions: Subcrestally placed implants with platform switching and internal conical connection maintained stable bone levels over a mean follow-up of more than 2 years. How a tight internal conical connection between abutment and implant may contribute to this clinical evidence should be more deeply investigated. MBL variations seem to be mostly influenced by an implant’s vertical position and presence of type-2 controlled diabetes.

scholarly journals Radiographic evaluation of a cross-shaped incision technique for thick-gingiva and thin-gingiva patients treated with implant-supported fixed prosthesis

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Wen Luo ◽  
Xinyu Wang ◽  
Yaqian Chen ◽  
Yuping Hong ◽  
Yili Qu ◽  
...  
Keyword(s):  
Gingival Recession ◽  
Trial Registration ◽  
Radiographic Evaluation ◽  
Significant Difference ◽  
Registration Number ◽  
Bone Level ◽  
Fixed Prosthesis ◽  
Marginal Bone Level ◽  
Incision Technique

Abstract Background To evaluate a cross-shaped incision technique for thick-gingiva and thin-gingiva patients treated with implant-supported fixed prosthesis. Methods Total 55 patients receiving cross-shaped incision were assigned into thick-gingiva group (29 cases) and thin-gingiva group (26 cases). Follow-up was performed at 3 and 12-month after final restoration. Results Mesial and distal papilla height was significantly greater in thick-gingiva group than thin-gingiva group at 3 and 12 months, while periodontal depth and crestal marginal bone level around implant had no significant difference between the two groups during follow-up. No case of recession of buccal marginal gingiva was observed in thick-gingiva group. However, the recession of marginal gingiva of buccal aspect of the crown was found in 5 patients (19.2%) with thin-gingiva. Conclusions The cross-shaped incision may be applied to reconstruct gingival papillae and avoid the gingival recession in patients with thick-gingiva phenotype. Trial registration This study was registered at ClinicalTrials.gov (registration number NCT04706078, date 12 January 2021, Retrospectively registered).

Marginal bone level changes and implant stability after loading are not influenced by baseline microstructural bone characteristics: 1-year follow-up

2015 ◽  
Vol 27 (10) ◽  
pp. 1212-1220 ◽  
Author(s):  
Danilo Rocha Dias ◽  
Cláudio Rodrigues Leles ◽  
Christina Lindh ◽  
Rejane Faria Ribeiro-Rotta
Keyword(s):  
Implant Stability ◽  
Bone Level ◽  
Marginal Bone Level

Comparative Soft and Hard Tissue Responses to Titanium and Polymer Healing Abutments

2011 ◽  
Vol 37 (sp1) ◽  
pp. 174-182 ◽  
Author(s):  
Theofilos Koutouzis ◽  
Joseph Richardson ◽  
Tord Lundgren
Keyword(s):  
Soft Tissue ◽  
Prospective Trial ◽  
Material Composition ◽  
Limited Information ◽  
Hard Tissue ◽  
Tissue Responses ◽  
Bone Level ◽  
Marginal Bone Level

Limited information exists regarding soft tissue and hard tissue responses to abutments with different material composition. The aim of this study is to evaluate soft and hard tissue responses to titanium and polymer healing abutments over a 3-month period. Sixteen patients were included in this prospective trial. Implants were provisionalized with either titanium or polymer healing abutments. Changes of marginal bone level and soft tissue dimensions were recorded at implant installation and at 3 months.

scholarly journals Clinical Significance of Internal Friction Connection and Micro-Threads in Implant-Supported Prostheses: A Literature Review

2020 ◽  
Vol 2 (4) ◽  
Author(s):  
Ki-Won Jeong ◽  
Jeong Chan Kim ◽  
In-Sung Luke Yeo ◽  
Keyword(s):  
Load Transfer ◽  
Structural Features ◽  
Tissue Response ◽  
Marginal Bone Loss ◽  
Load Transfer Mechanism ◽  
Implant Abutment ◽  
Conical Connection ◽  
Bone Level ◽  
Marginal Bone Level

A connection structure using both a screw and friction is advantageous to secure an abutment to an implant. Understanding the biomechanics of the implant-abutment connection is necessary for the long-term clinical survival of a dental implant with decreased complications. The internal conical friction connection structure and micro-threads have shown favorable biological hard tissue response with exceptional structural features. The internal conical connection structure maintains the soft tissue seal and the marginal bone level around the implant. The durability of the implant wall thickness at the top is balanced via micro-threads with the load-transfer mechanism, resulting in proper peri-implant bone strain. These two structural devices are designed to achieve implant-abutment connection stability by redistributing an external load and by minimizing screw loosening events that cause implant component fractures and marginal bone loss.

scholarly journals Effect of Opposite Tooth Condition on Marginal Bone Loss around Submerged Dental Implants: A Retrospective Study with a 3-Year Follow-Up

2021 ◽  
Vol 18 (20) ◽  
pp. 10715
Author(s):  
Odontuya Dorj ◽  
Hsi-Kuei Lin ◽  
Eisner Salamanca ◽  
Yu-Hwa Pan ◽  
Yi-Fan Wu ◽  
...  
Keyword(s):  
Retrospective Study ◽  
Bone Loss ◽  
Dental Implants ◽  
Marginal Bone Loss ◽  
Bone Level ◽  
Natural Teeth ◽  
Marginal Bone Level

Background: The objective of this study was to evaluate the effects of opposite tooth conditions on change in marginal bone level (MBL) around submerged dental implants. Materials and methods: The study included healthy patients with one or two implants. Structures opposite implants were either natural teeth (NT) or fixed restorations (FRs). MBLs were measured on digital periapical radiographs at the mesial and distal aspects of each implant. Results: Sixty implants were inserted by the 3-year follow-up. Mean MBLs for NT were 0.21 ± 0.33 mm before prosthetic loading and 0.30 ± 0.41 mm 3 years later (p = 0.001). Mean MBLs with FRs were 0.36 ± 0.45 mm before loading and 0.53 ± 0.50 mm 3 years later (p < 0.001). Changes in mean MBL from the 6-month follow-up to the 1- and 3-year follow-ups were statistically significant (p < 0.01) for implants opposite NT. However, changes in mean MBL from the 6-month follow-up to the 1-year (p = 0.161) and 3-year follow-ups (p = 1.000) were not significant for implants opposite FRs. Between baseline and the 3-year follow-up, MBL change was relatively small and did not differ regarding NT and FRs. Conclusion: Bone loss was greater if submerged dental implants were opposed by FRs. MBLs around submerged implants continued to change after 3 years if NT opposed implants.

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