Journal of Periodontal and Implant Science

  • 제53권6호
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  • Pages.453-466
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  • 2023
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  • 2093-2278(pISSN)
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  • 2093-2286(eISSN)
대한치주과학회 (Korean Academy of Periodontology)
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CBCT assessment of alveolar bone wall morphology and its correlation with tooth angulation in the anterior mandible: a new classification for immediate implant placement

  • Nur Hafizah Kamar Affendi (Unit of Prosthodontics, Centre of Restorative Dentistry Studies, Faculty of Dentistry, Universiti Teknologi MARA (UiTM), Kampus Sungai Buloh, Jalan Hospital) ;
  • Jumanah Babiker (Faculty of Dentistry, Universiti Teknologi MARA(UiTM), Kampus Sungai Buloh, Jalan Hospital) ;
  • Mohd Yusmiaidil Putera Mohd Yusof (Centre of Oral & Maxillofacial Diagnostics & Medicine Studies, Faculty of Dentistry, Universiti Teknologi MARA (UiTM), Kampus Sungai Buloh, Jalan Hospital)
  • 투고 : 2021.09.11
  • 심사 : 2023.02.02
  • 발행 : 2023.12.31
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초록

Purpose: This study aimed to quantify alveolar bone morphology, demonstrate the relationship between tooth angulation and alveolar bone thickness, and introduce a new classification for anterior mandibular teeth related to immediate implant placement (IIP). Methods: Cone-beam computed tomography (CBCT) images of 211 anterior mandibular teeth were analyzed in sagittal slices to measure the thickness of the facial alveolar bone crest (FAB1) and apex (FAB2), and the lingual alveolar bone crest (LAB1) and apex (LAB2). Tooth angulation was classified as 1°-10°, 11°-20°, and >20° according to the tooth's long axis and alveolar bone wall. Spearman correlation coefficients were used to evaluate correlations between the variables. Results: FAB1 and LAB1 were predominantly thin (<1 mm) (84.4% and 73.4%, respectively), with the lateral incisors being thinnest. At the apical level, FAB2 and LAB2 were thick in 99.5% and 99.1% of cases, respectively. Significant differences were documented in FAB2 (P=0.004), LAB1 (P=0.001), and LAB2 (P=0.001) of all mandibular teeth. At all apical levels of the inspected teeth, a significant negative correlation existed between TA and FAB2. Meanwhile, TA showed a significant positive correlation with LAB2 of the lateral incisors and canines. These patterns were then divided into class I (thick facial and lingual alveolar bone), class II (facially inclined teeth) with subtype A (1°-10°) and subtype B (11°-20°), and class III (lingually inclined teeth) with subtype A (1°-10°) and subtype B (11°-20°). Conclusions: Mandibular anterior teeth have predominantly thin facial and lingual crests, making the lingual bone apical thickness crucial for IIP. Although anchorage can be obtained from lingual bone, tooth angulation and tooth types had an impact on IIP planning. Hence, the new classification based on TA and alveolar bone wall may enable rational clinical planning for IIP treatment.

키워드

과제정보

The authors would like to thank Dr. Sam Ye Han for his contributions to testing the reliability of the measurement technique, and the radiology department staff for their guidance in using the CS 3D Imaging Software v3.5.7 (Carestream Dental, Atlanta, GA, USA). Finally, we would like to thank Dr. Mohamed Eldigire Hamid Ahmed for his help and guidance with the statistical analysis of the data.

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