Alveolar Bone Remodeling around Immediate Implants according toextraction socket classification

Objectives:

Previous studies assessed bone remodeling merely after a single tooth extraction;

however, the effect of multiple contiguous teeth extractions around immediate implant remains

unknown. The aim of this micro-computed tomographic investigation was to analyze the alveolar

bone remodeling around immediate implants placed in accordance with the extraction socket

classification (ESC)

Methods:

 Under general anesthesia, ten beagle dogs underwent atraumatic tooth

extractions according to the ESC. Animals were randomly divided into three groups (ESC-I:

single tooth extraction, b) ESC-II: two contiguous teeth extraction, and c) ESC-III: more than

two contiguous teeth extraction) with 16 sites per group. Immediate implants were inserted in

each class and postoperative plaque control measures were undertaken. After euthanasia, the jaw

segments were evaluated for bone thickness, marginal bone loss (MBL) and bone-to-implant

contact (BIC) using micro-computed tomography

Results:

The mean buccal bone thickness (P<0.05) and MBL (P<0.05) was compromised in

jaws in ESC-III as compared to those in ESC-I and -II. The BIC was significantly higher among

jaws in ESC-I as compared to those in ESC-II and –III (P<0.05). There was no significant

difference in the buccal bone thickness, MBL and BIC among the groups in the maxilla and

mandible. Lingual bone remodeling did not reveal any significant differences among the groups

in both jaws

Conclusions:

Buccal bone remodeling is significantly more extensive around immediate implants

placed in multiple contiguous tooth extraction sites as compared to immediate implants placed in

single tooth extraction sites.