Influence of Implant Placement Depth and Soft Tissue Thickness on Crestal Bone Stability Around Implants With and Without Platform Switching: A Comparative Clinical Trial

Zukauskas, Saulius; Puišys, Algirdas; Andrijauskas, Paulius; Zaleckas, Linas; Vindašiūtė‐Narbutė, Eglė; Linkevičius, Tomas

doi:10.11607/prd.5256

Cited by 7 publications

(4 citation statements)

References 8 publications

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“…In contrast, the study of Spinato et al found that platform-switching implants placed at a crestal level with short healing abutments demonstrated twice bone level loss than with long healing abutments irrespectively of initial mucosal thickness [ 38 ]. Another confounding factor could be the depth of the implant shoulder in relation to the initial soft tissue thickness [ 39 , 40 ]. It should be noted that a 12-month period may not be enough to distinguish between physiological and pathological bone loss, and further studies with a long-term follow-up are needed to evaluate the impact of the implant neck configuration on bone resorption during the early and late stages of healing.…”

Section: Discussionmentioning

confidence: 99%

The effect of a convergent transmucosal neck on soft tissues and radiographic outcomes: a 1-year follow-up randomized controlled trial

et al. 2023

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Purpose The aim of this randomized controlled clinical trial was to evaluate peri-implant marginal bone levels (MBLs) and soft tissue dimension changes 1 year after loading. Patients in the control group received bone-level implants, whereas in the test group, tissue-level implants with a convergent transmucosal neck were used. Material and methods MBLs were calculated by measuring the distance from the implant shoulder to the first visible bone-to-implant contact using standardized periapical digital radiographs. Baseline (day of loading) and follow-up digital models obtained with an intraoral scanner were used to quantify the changes in the peri-implant soft tissue dimensions with a best-fit algorithm. Results The difference between final and baseline MBLs showed a mean bone loss of 0.16 ± 0.01 mm in the test group (n = 15) and 0.45 ± 0.09 mm in the control group (n = 14) (p > 0.05). Soft tissue contour at the level of the gingival margin (GM) increased by 1.96 ± 2.69 mm in the test group and 0.65 ± 0.42 mm in the control group (p = 0.167). Both groups showed a coronal displacement of the gingival margin with no significant differences among them. Conclusions The present study demonstrated peri-implant hard and soft tissues stability at both implant designs with no significant differences 12 months after loading. Clinical relevance There is still insufficient scientific evidence to demonstrate the role and advantages of the convergent transmucosal neck on the behavior of the peri-implant soft and hard tissues stability compared to a straight neck in bone-level implants 12 months after loading.

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Section: Discussionmentioning

confidence: 99%

The effect of a convergent transmucosal neck on soft tissues and radiographic outcomes: a 1-year follow-up randomized controlled trial

et al. 2023

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“…A lack of systematic methods for analyzing the submucosal soft tissue around subcrestally placed implants in a three-dimensional way likely contributes to unfounded pessimistic views. Three-dimensional soft tissue analysis (3DSTA) is particularly vital for subcrestal placements known to help reduce bone loss incidence^[1, [22][23][24][25]. This technique also supports the creation of more natural-looking prostheses by providing sufficient space to offset the diameter difference between crowns and abutment-fixture connections, ensuring an appropriate emergence profile.…”

Section: Three-dimensional Analysis and Subcrestal Implant Placementmentioning

confidence: 99%

3-Dimensional Soft Tissue Analysis (3DSTA) of Subcrestally Placed Implants: Relating Biologic Stability with Morphologic Achievements.

Chiyun

2024

Preprint

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Objectives (Purpose) This study aims to evaluate the outcomes of the Subcrestally Placed Implant (SPI) technique in single molar cases, focusing on biological stability and aesthetics. It proposes a schematic model to elucidate the interplay between the biological stability of soft tissues and bone around the SPI and the morphological requisites that Implant Abutment Prostheses (IAP) must fulfill to effectively replace natural teeth. Materials and methods I examined 20 cases using the SPI technique with Internal Platform Switching (IPS) design implants for single molar replacements to assess their stability. Routine check-ups utilized plain panoramic X-rays to measure changes in crestal bone on the mesial and distal sides. Additionally, 10 cases with CBCT X-rays taken more than one year after the initial surgery underwent a novel 3-dimensional soft tissue analysis (3DSTA). Measurements included placement depths (PD), soft tissue thickness (STT) at central (cPD, cSTT) and peripheral areas (pPD, pSTT), the length of the Transitional Zone (TZ) on mesial, distal, facial, and lingual aspects, and crestal bone thickness (CBT) at buccal and lingual sites. Results Panoramic analyses showed minimal changes in crestal bone (mean changes of pPD were less than 0.1 mm) over an average period of 3.3 years. Average measurements were as follows: cPD was 1.7 mm, pPD was 2.7 mm, cSTT was 0.2 mm, pSTT was 0.6 mm, TZ length was 3.8 mm, buccal CBT was 3.0 mm, and lingual CBT was 3.7 mm. Conclusions CBCT analyses of the topographical relationships between soft tissue and crestal bone with IAP for SPIs demonstrated stable results over an average 3-year period. The consistency in the relationship between crestal bone and surrounding soft tissue can be ascribed to biological structural integrity. The study classified peri-implant soft tissues into subcrestal and supracrestal (transitional zone – TZ) segments, exploring their characteristics through dimensional measurements and assessing mechanical resistance. Further histological study is needed to identify specific features of each segment.

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“…Over the years, different solutions have been developed, depending on the degree of atrophy and patients' needs [3][4][5]. The success of rehabilitations depends on various factors, such as appropriate presence of hard and soft tissues, healthy systematic conditions, macro-and microimplant morphologies, correct positioning, and maintenance over the years [6][7][8][9][10][11][12]. The use of computer-guided surgery has made it possible to simplify procedures and carry out guided prosthetic rehabilitation, also allowing immediate loading procedures [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Accuracy of DICOM–DICOM vs. DICOM–STL Protocols in Computer-Guided Surgery: A Human Clinical Study

D’Addazio

Xhajanka

Traini

et al. 2022

JCM

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Guided implant surgery can enhance implant placement positioning, increasing predictability and decreasing postoperative complications., To date, the best protocol to be used for template realization is still unknown. Thus, the aim herein was to clinically compare the accuracy of two different protocols. A total of 48 implants were divided into Group A (24 implants), in which a stereolithographic template was realized using the digital imaging and communications in medicine (DICOM) data arrived from cone beam computer tomographies (CBCTs) (patients and prothesis alone), and Group B (24 implant), in which a standard intraoral stent with a standardized extraoral support was used for patients’ intraoral impressions and CBCT. The preimplant virtual planning and postsurgery CBCT images of both groups were superimposed, and differences were registered in terms of average deviations at the platform (a) and implant apex (b), mean depth change (c), and angular deviation (d). The results demonstrated that there were no statistically significant differences between groups (p = 0.76) for the parameters measured. However, statistically significant differences (p < 0.05) were found between maxillary and mandible implant surgery, as the latter showed greater accuracy. Additional studies are necessary to further reduce discrepancies between planning and surgical procedures.

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Influence of Implant Placement Depth and Soft Tissue Thickness on Crestal Bone Stability Around Implants With and Without Platform Switching: A Comparative Clinical Trial

Cited by 7 publications

References 8 publications

The effect of a convergent transmucosal neck on soft tissues and radiographic outcomes: a 1-year follow-up randomized controlled trial

The effect of a convergent transmucosal neck on soft tissues and radiographic outcomes: a 1-year follow-up randomized controlled trial

3-Dimensional Soft Tissue Analysis (3DSTA) of Subcrestally Placed Implants: Relating Biologic Stability with Morphologic Achievements.

Accuracy of DICOM–DICOM vs. DICOM–STL Protocols in Computer-Guided Surgery: A Human Clinical Study

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