Maxillofacial Plastic and Reconstructive Surgery

Korean Association of Maxillofacial Plastic and Reconstructive Surgeons (대한악안면성형재건외과학회)
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THE EFFECTS OF RESORBABLE PLATE IN THE HEALING PROCESS OF MANDIBULAR FRACTURE OF THE RABBITS

흡수성 고정판이 가토의 악골골절 치유에 미치는 영향

  • Park, Hyun-Wook (Dept. of Oral and Maxillofacial Surgery, College of Dentistry, Kyung-Hee University) ;
  • Ryu, Dong-Mok (Dept. of Oral and Maxillofacial Surgery, College of Dentistry, Kyung-Hee University) ;
  • Lee, Han-Joo (Dept. of Oral and Maxillofacial Surgery, National Medical Center) ;
  • Huh, Won-Shil (Dept. of Oral and Maxillofacial Surgery, National Medical Center)
  • 박현욱 (경희대학교 치과대학 구강악안면외과학교실) ;
  • 류동목 (경희대학교 치과대학 구강악안면외과학교실) ;
  • 이한주 (국립의료원 구강악안면외과) ;
  • 허원실 (국립의료원 구강악안면외과)
  • Received : 1999.04.06
  • Accepted : 1999.05.06
  • Published : 1999.06.30
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Abstract

The purpose of this study is to evaluate the effects of resorbable plate in the healing process of mandibular fracture. Reduction and rigid fixation was carried out on the artificial mandibular fracture site of the rabbits, using a resorbable screw, 1.5mm in diameter and 4.0mm in length, and an absorbable plate 1.5mm in thickness(Lactosorb$^{(R)}$). En block tissue specimens with plate were taken from the rabbits at 4, 6, 8, and 10 weeks intervals and specimen were observed with light microscope under the hematoxylin-eosin staining, to observe the inflammatory reaction and tissue healing process. The following conclusions were drawn: 1. The subject displayed good healing with no signs of detachment of the fixation plate. 2. At 4 weeks, the plate was covered by the connective tissue. Then at 6 weeks, bone regeneration was discovered around the plate. 3. During the period of healing, no inflammatory reaction or foreign body reaction, as a result of using resorbable plate, were observed. 4. At 8 weeks, the initial phase of the absorption of the plate was observed. Then at 10 weeks, macrophage were observed around the plate, indicating the absorption phase was in process. From the above results, it can be determined that when the resorbable plate is applied to rabbit, full recuperation occurs naturally in the absence of inflammatory reaction and foreign body reaction. The selected study is clinically valuable in proving this procedure.

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