| ObjectiveStudy the correlation between bone defect, bone perforation, and bone graft or barrier membranes technique homochronously on the buccal alveolar and ages and tooth positions of cases, which can provide some references in dental implantation clinical work for individualizedly making preoperative examination projects, operation scheme, and intraoperative considerations, etc.Methods69 implantation cases were selected from the department of stomatology of the First Hospital of Shanxi Medical University during January 2012 to January 2014 (All cases were carried out preoperative examination according to the dental implantation standards, excluded systemic diseases, and conformed to dental implantation indications. And all the implants were good stability and no loosening after 3-12 months of the crown restoration.). According to ages, the cases were divided into three groups, including 18-30 years old group,31-45 years old group, and 46-60 years old group. And according to tooth positions, the cases were divided into two groups, including anterior teeth group (incisor teeth and canine teeth) and posterior teeth group (premolar teeth and molar teeth). We retrospected bone defect, bone perforation, and bone graft or barrier membranes technique homochronously on the buccal alveolar basing on case records and image data. Then we analysised these information by the statistical soft.ResultsDate information:1.18-30 years old group: Bone defect:anterior teeth 3 cases; posterior teeth 1 case. Reasons of bone defect:trauma 8 cases; periapical diseases 14 cases; periodontal diseases 0 case. 31-45 years old group: Bone defect:anterior teeth 2 cases; posterior teeth 15 cases. Reasons of bone defect:trauma 2 cases; periapical diseases 16 cases; periodontal diseases 8 cases. 46-60 years old group: Bone defect:anterior teeth 6 cases; posterior teeth 11 cases. Reasons of bone defect:trauma 2 cases; periapical diseases 12 cases; periodontal diseases 7 cases.2. Bone perforation:anterior teeth 7 cases; posterior teeth 8 cases.3. Bone graft or barrier membranes technique:anterior teeth 10 cases; posterior teeth 20 cases.Statistics analysis:1. a.46-60 years old group has a higher ratio of buccal anterior alveolar defect (P<0.0125) than 18-30 years old group. b.31-45 years old group and 46-60 years old group respectively has a higher ratio of buccal posterior alveolar defect (P<0.0125) than 18-30 years old group.2. Anterior teeth group has a higher ratio of bone graft or barrier membranes technique than posterior teeth group (P<0.05).3. Anterior teeth group has could not be considered that there is a different ratio of bone perforation to posterior teeth group (P<0.05).4. There is a moderate correlation between ages and the reasons of buccal alveolar defect (0.005<P<0.01,C=0.41∈[0,1]).ConclusionsSome references in dental implantation clinical work:1. We should give more attentions to the impossibility of buccal alveolar defect in anterior implantation of 46-60 years old and posterior implantation of 31-60 years old, and make better preoperative examination and preparatory work. Then we should prudently choose the flapless pattern.2. To cases whose anterior teeth have not been extracted, we might have a consideration of the implantation pattern combining bone graft immediately in postextraction sockets with delayed implantation. While to cases whose anterior teeth have been lost for long time, we must make a full preparation for bone graft or barrier membranes technique before implantation, including graft materials and instruments. And we must design a reasonable flap pattern in the surgery beginning to provide convenience for bone graft and suture.3. To posterior implantation, we could not neglect whether there is a buccal alveolar wall perforation during the period of preoperative CT examination or gingival flap operation.4. To patients with bone defect showed by imaging data, we should make optimal implantation schemes according to comprehensive analysis by combining with ages and the reasons of bone defect. |
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