抄録
There has been less research work on the necessity of attached gingiva (keratinized immobile mucosa) in the practice of placing implants than that on natural teeth.
The following observation was made in this study to know what kind of influence the nonkeratinized mobile peri-implant mucosa has on the peri-implant tissue.
This is the chronological evaluation made by periodontal parameters in a case of mandibular free end concerning the nonkeratinized mobile mucosa on the buccal side and the keratinized immobile mucosa on the lingual side of the implant.
In addition to this treatment, the implant was placed after the gingival grafting on the opposite buccal side so that the keratinized mobile mucosa might be acquired on both sides to compare the right side with the left side.
The results obtained were as follows:
1. The nonkeratinized mobile mucosa contacting the implant easily induces inflammation, and the progress of inflammation is fast. At that moment,the periodontal parameters react remarkably. The keratinized immobile mucosa around the implant plays a definite role of defense against the outside stimulation and restrains the appearance of inflammation.
2. At the moment of the implant being placed, if it contacts the nonkeratinized mobile mucosa, it is necessary to acquire the keratinized immobile mucosa in order to stabilize the peri-implant tissue in good condition for a long time.
