Alveolar bone resorption following coronal versus apical approach in a mucoperiosteal flap surgery procedure in the rat mandible.
BACKGROUND
In several publications, we have reported that a distinct resorptive phase of alveolar bone developed during 3 weeks following elevation of a mucoperiosteal flap in rats by a coronal surgical approach. In the present study, we compared the alveolar bone loss after mucoperiosteal flap surgery by a coronal approach (COR) to a surgical approach incising the mucosa close to the tooth apices and separating the mucoperiosteum toward the tooth crown (apical approach, AP).


METHODS
Eighteen Wistar rats were divided into 2 experimental groups; each group consisted of 9 rats. In the first group, COR was performed on both buccal and lingual aspects on the right side of the rat mandible, while the left side served as a sham-operated control. In the second experimental group, AP was performed.


RESULTS
In the AP group, the outer aspect (buccal or lingual) of the alveolar bone was slightly resorbed usually at the level where the mucosa was incised. In many sections, extensive modeling of new trabecular bone was seen, coronal to the surgical incision. On the contrary, the coronal surgical approach revealed an extensive resorptive phase, mainly of the periodontal aspect of the alveolar bone.


CONCLUSIONS
The results of this study show that periodontal surgery by a coronal surgical approach stimulates a burst of remodeling of the alveolar bone in a very specific pattern.
Binderman
I
I
Department of Oral Biology, Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel. binderma@post.tau.ac.il
Adut
M
M
Zohar
R
R
Bahar
H
H
Faibish
D
D
Yaffe
A
A
D016301:Alveolar Bone Loss / Q000209:etiology* / Q000473:pathology; D000539:Alveolar Process / Q000473:pathology; D000818:Animals; D016723:Bone Remodeling / Q000502:physiology; D016009:Chi-Square Distribution; D003094:Collagen; D004396:Coloring Agents; D005456:Fluorescent Dyes; D005890:Gingivectomy; D008334:Mandible / Q000473:pathology / Q000601:surgery*; D008852:Microradiography; D009061:Mouth Mucosa / Q000637:transplantation*; D010010:Osteoclasts / Q000473:pathology; D010011:Osteocytes / Q000473:pathology; D010513:Periodontal Ligament / Q000473:pathology; D010521:Periosteum / Q000637:transplantation*; D051381:Rats; D017208:Rats, Wistar; D013223:Statistics as Topic; D013524:Surgical Flaps / Q000009:adverse effects* / Q000145:classification; D014945:Wound Healing
D004396:Coloring Agents; D005456:Fluorescent Dyes; D003094:Collagen