Effect of different implant placement depths on crestal bone levels and soft tissue behavior: a randomized clinical trial

Objectives This randomized clinical trial analyzed crestal bone changes and soft tissue dimensions surrounding implants with an internal tapered connection placed in the mandible anterior region at different depths (equicrestal and subcrestal). Materials and methods Eleven edentulous patients (five...

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Bibliographic Details
Published in:Clinical oral implants research 2017-10, Vol.28 (10), p.1227-1233
Main Authors: Siqueira, Rafael Amorim Cavalcanti, Fontão, Flávia Noemy Gasparini Kiatake, Sartori, Ivete Aparecida de Mattias, Santos, Paulo Gustavo Freitas, Bernardes, Sérgio Rocha, Tiossi, Rodrigo
Format: Article
Language:English
Subjects:
Aged
Alveolar Process - anatomy & histology
Bone implants
Bone loss
bone remodeling
Bone-Implant Interface - physiology
Clinical trials
cone‐beam computed tomography
Dental Implantation, Endosseous - methods
Dental implants
Dentistry
Gingiva - physiology
Humans
immediate dental implant loading
Mandible
Middle Aged
Mucosa
Patients
Radiographs
Radiography
Recession
Variance analysis
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Summary:Objectives This randomized clinical trial analyzed crestal bone changes and soft tissue dimensions surrounding implants with an internal tapered connection placed in the mandible anterior region at different depths (equicrestal and subcrestal). Materials and methods Eleven edentulous patients (five implants per patient) were randomly divided in a split‐mouth design: G1, 28 equicrestal implants; and G2, 27 subcrestal implants. All implants were immediately loaded. Correlation between keratinized tissue width (KTW) and vertical mucosa thickness (MT) with soft tissue recession was analyzed. Intraoral radiographs were used to evaluate crestal bone changes. Patients were assessed immediately, 4‐, and 8‐months after implant placement. Rank‐based ANOVA‐type statistical test was used for comparison between groups (α = 0.05). Results Fifty‐five implants (G1 = 28 and G2 = 27) were assessed in 11 patients. Implant survival rate was 100% for both groups. Both tested implant placement depths presented similar crestal bone loss (P > 0.05). Significant crestal bone loss for each group was found in the different measurement times (T4 and T8) (P  0.05). Conclusions Different implant placement depths do not influence crestal bone changes. Soft tissue behavior is not influenced by different implant placement depths or by the amount of keratinized tissue.
ISSN:0905-7161
1600-0501
DOI:10.1111/clr.12946