連結固定が歯周組織の粘弾性特性に及ぼす影響

Abstract

The purpose of the present study was to determine whether splinting of healthy teeth affected the mechanical mobility of each tooth. Upper first and second premolars, upper second premolar and first molar, or lower premolar and IMZ implants with titanium element were splinted with the device, without any changes of occlusal tooth contacts, which could be removed by the operator over about 2-month period. Horizontal mechanical mobility of individual teeth and implants were measured periodically.The results were as follows:1. The coefficient of variation in the mechanical mobility of splinted teeth for periods of experimental were significantly greater than those in non-splinted control teeth (p<0.01).2. For a few days after the start of splinting the effect of splinting on mechanical mobility of each tooth splinted was great significant.3. When a difference between the two initial mobility of teeth was large, the difference tended to become smaller after splinting. And furthermore, there was a greater percentage change in mobility of teeth that initially had smaller mobility than was the case for teeth that initially had greater mobility.4. The mobility of teeth did not decrease significantly after splinting with implants.