Answer: (c)
No Sharpey’s fibers attachment to implant abutment.
How do fibers form at implant interface?
Architecture:
- Peri-implant free gingiva corresponds to teeth.
- Sulcular epithelium forms peri-implant gingival crevice.
- Implant junctional epithelium.
- Basal cell layer with hemidesmosomal attachment to the abutment.
- Hemidesmosomes have lamina densa (at abutment surface) and lamina lucida.
- Surface oxide layer and hemidesmosomal glycoprotein may form a chemical bond attachment.
- Not chemically strong, separated with 20-25 grams of pulling force.
- Deep within the sulcus, collagen fibers form a tight cuff around the abutment. Some of these fibers run perpendicular to the abutment, others circumferentially. Thus mature collagen “seal” at the bone level may provide contact inhibition to prevent epithelial down growth.
Ref: Bauman G, Rapley J, Hallmon W, Mills M. The Peri-Implant Sulcus. Int J Oral Maxillofacial Implants 1993;8:273-280.
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