Evidence map›Paper›PMID 40751787›Full record

ReviewInternational journal of implant dentistry2025

The 3D theory of osseointegration: material, topography, and time as interdependent determinants of bone-implant integration.

Takahiro Ogawa, Makoto Hirota, Rune Shibata, Takanori Matsuura, Keiji Komatsu, Juri Saruta, Wael Att

Abstract readReview
In one paragraph

Review in International journal of implant dentistry, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

8 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
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  6. Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Takahiro OgawaWeintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA, USA. togawa@dentistry.ucla.edu.
Makoto HirotaDivision of Oral and Maxillofacial Surgery, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Rune ShibataWeintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA, USA.
Takanori MatsuuraWeintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA, USA.
Keiji KomatsuWeintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA, USA.
Juri SarutaWeintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA, USA.
Wael AttMedical Center - University of Freiburg, Center for Dental Medicine, Department of Prosthetic Dentistry, Faculty of Medicine, University of Freiburg, Freiburg, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Despite widespread clinical success of dental implants, several fundamental questions remain unresolved: How does osseointegration-a biological phenomenon distinct from conventional bone healing-actually occur? Why does bone-implant contact never reach 100%? Why has there been minimal innovation in commercial implant surfaces over the past three decades? And why has the failure rate plateaued at around 8%? This review introduces the 3D Theory of Osseointegration, which conceptualizes implant integration as governed by three interdependent and dynamic determinants: material composition (Dimension 1), surface topography/roughness (Dimension 2), and time, which critically influences the physicochemical properties of implant surfaces (Dimension 3). For Dimension 1, the biocompatibility of various metals has been extensively studied, with commercially pure titanium and titanium alloys firmly established as the gold standard for dental implants. Dimension 3 underscores the long-overlooked impact of time-specifically, the biological aging of titanium surfaces caused by hydrocarbon accumulation and the loss of hydrophilicity-which significantly diminishes osteoconductivity. Importantly, recent studies have uncovered that this time-dependent degradation, once seen as an inevitable limitation, is in fact fully reversible. UV photofunctionalization restores surface hydrophilicity and removes hydrocarbon contaminants, revitalizing the bioactivity of titanium. This breakthrough not only resolves a long-standing barrier to optimal osseointegration but also establishes quantitative thresholds for key physicochemical parameters-such as carbon content and surface wettability. As a result, Dimensions 1 and 3-material and physicochemical properties-are approaching maturity in terms of optimization. In contrast, Dimension 2, surface topography, remains relatively underdeveloped despite decades of research and the clinical success of microrough surfaces. Now that UV photofunctionalization effectively mitigates biological aging and unlocks the full physicochemical potential of implant surfaces, the advancement of surface topography becomes the next critical frontier. This review critically examines each dimension, their interactions, and the limitations of current topographical design. It advocates for a shift from empirical to mechanism-driven engineering of implant surfaces and underscores the need for intentional synergy across all three dimensions. The 3D Theory of Osseointegration offers a structured framework to inform future implant design and research, aiming to better control and optimize the biological process of integration while acknowledging the complexities that still remain to be fully addressed.

Indexed as

Bone-Implant InterfaceDental ImplantsOsseointegrationHumansSurface PropertiesTime FactorsTitaniumDental ImplantsTitanium

Identifiers

PMID40751787
PMCPMC12317956

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.