Robust guidance
Similar groove effect
A comparable effect in both ECM states suggests ECM-robust guidance, even when the interaction is near zero.
Does the surrounding gingival ECM state change how microgrooves organize fibroblast alignment, inward migration, and matrix deposition after premature GBR membrane exposure? This model screens that interaction and helps prioritize groove depths for a first wet-lab comparison; it does not predict a final membrane.
Every condition change restarts the same seed at day 0.
An axis-only cue: it can align cells without directing them inward. Depth ranks starting conditions for later testing; width and pitch are not represented.
A fixed state of the surrounding gingival matrix—not the membrane's bulk stiffness and not a timed intervention.
Compare groove with its matched flat reference—not with zero. ECM infill counts persistent deposited marks, not cells passing through the defect.
Three short views keep the decision logic, translation path, and evidence boundary separate.
At each depth, compare groove with its matched flat condition in both ECM states. The key result is whether the groove effect changes with ECM state—not which single animation scores highest.
Interaction(d) = [Groove(d) − Flat]higher ECM − [Groove(d) − Flat]lower ECMA comparable effect in both ECM states suggests ECM-robust guidance, even when the interaction is near zero.
A repeatable difference between ECM states supports the interaction hypothesis.
Prioritize depths that improve organization without sacrificing inward migration or matrix infill across matched seeds.
Depth is a screening input, not an optimum. Its strength mapping is phenomenological and rises monotonically by construction. A deep groove may therefore increase modeled alignment while still being a poor experimental candidate.
Run flat and 0.3/0.8/2/5 µm groove conditions under both ECM states across repeated matched seeds.
Compare flat with the shortlisted groove conditions in lower- and higher-stiffness ECM while holding one exposure-mimetic condition constant. Width and pitch enter here.
Move only a reproducible topographic effect onto a candidate groove-bearing membrane platform; material and fabrication route remain open.
Collaboration fit: published gingival ECM mechanobiology supplies the state axis; this project contributes the early-exposure question, the microgroove screen, and later membrane translation. This remains one fibroblast module—barrier integrity, epithelial sealing, and the bone-facing regenerative layer are outside the simulation.
The ECM-state axis is anchored in gingival-fibroblast-specific evidence from Makkar et al. (2026) and informed by earlier work on mechanical regulation of inflammatory cell state and mechanically tunable cell-instructive matrices.
Whether ECM state modifies microgroove-driven alignment, inward migration, or matrix deposition in gingival fibroblasts remains to be tested.
The animation ranks comparisons generated by encoded rules. It is not biological evidence or a prediction of healing.
Model boundary. This is a qualitative, uncalibrated prioritization tool. Groove depth is encoded as increasing guidance, while ECM state is operationalized through orientational noise, persistence, and matrix-deposition probability; neither the groove-depth nor the ECM-state mapping is fitted to gingival-fibroblast data. Width, pitch, viscoelasticity, inflammatory signalling, bone-side biology, complete mucosal closure, and post-arrival integration are not modelled. Premature exposure is represented by a fixed linear band—not a finite, remodelling wound—and ECM state refers to the surrounding matrix, not membrane bulk stiffness.
Decision boundary. The ECM-dependence hypothesis would not be supported under the tested conditions if repeated matched-seed runs produced similar groove–flat contrasts in lower- and higher-stiffness ECM. A reproducible, non-zero groove effect of similar magnitude in both states would instead indicate ECM-robust guidance; no reproducible groove effect would leave that depth unsupported for that specific metric.