Radiological Evaluation of the Dimensions of Lower Molar Alveoli

Agostinelli, Claudio; Agostinelli, Agnese; Berardini, Marco; Trisi, Paolo

doi:10.1097/id.0000000000000757

Cited by 9 publications

(11 citation statements)

References 14 publications

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“…In this study, the mean thickness of the BLW at the apex and at the crest was greater at 2 M than at 1 M, which is consistent with the results of previous CBCT studies ( Braut et al, 2012 , Agostinelli et al, 2018 ). The type of mandibular ridge appeared to be shared equally by Convergent type and Parallel type in both the 1 M and 2 M sites.…”

Section: Discussionsupporting

confidence: 93%

“…Mandibular 1 M had parallel or slightly convergent root morphology, and mandibular 2 M were more convergent, suggesting that the 2nd molars favored interdental bone support in addition to IRB for IMI. Similar results were reported by previous studies, where 1 M had a thick interdental septum and the roots were either parallel or divergent compared to 2 M ( Braut et al, 2012 , Agostinelli et al, 2018 ).…”

Section: Discussionsupporting

confidence: 91%

“…The present CBCT analysis was carried out to measure the bone support from the extraction socket and interradicular septa in providing primary stability of IMI. Reports of previous studies have shown that the interdental, buccal & lingual cortical bone and interradicular septal bone are primary factors for implant stability and success rate, provided that co-factors, such as tooth morphology, atraumatic extraction with IRB preservation techniques, length, diameter and angulation of implants and presurgical CBCT analysis are taken into consideration ( Braut et al, 2012 , Chrcanovic et al, 2015 , Agostinelli et al, 2018 , Lin et al, 2014 ).…”

Section: Discussionmentioning

confidence: 99%

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Inter radicular bone dimensions in primary stability of immediate molar implants – A cone beam computed tomography retrospective analysis

Sayed

Shaikh

et al. 2021

The Saudi Dental Journal

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Purpose The purpose of the study was to analyze the dimensions of socket morphology, interradicular bone dimensions, root length and morphology, buccal cortical bone thickness and gap defect between the implant bone in mandibular molars with cone beam computed tomography (CBCT) for immediate molar implant (IMI) placement. Materials and methods Sample sizes of 300 mandibular 1st and 2nd molars were each selected from the CBCT scans by inclusion and exclusion criteria. CBCT measurements were performed for socket size morphology, mesiodistal width, and buccolingual cancellous bone width at the crest at the apex. Width of the buccal cortical plate at the crest and interradicular bone (IRB) at the apex, 3 mm cervical to the apex and 6 mm cervical to the apex. Vertical parameters from the crest to furcation (L1), length from furcation to the apex (L2) and mesiodistal root morphology were measured to analyze the root configuration. Results All the parameters were analyzed for descriptive statistics for the mean and standard deviation. The majority were of Type B and C socket morphology with peri -implant bone defects of 2–2.5 mm, and the interradicular bone septum (IRB) was moderate for both first molar (1 M) and second molar (2 M) sites, but 2 M was shown to have less IRB than 1 M. Adequate buccal cortical bone thickness of 1.1 mm to 1.4 mm and buccolingual cancellous bone width were measured for both the 1 M and 2 M sites. Conclusion The morphology of the molar extraction socket determines the adequate stability for IMI. In mandibular molar teeth, where interradicular bone is incompetent in providing good primary stability, in addition to interradicular bone, clinicians should look for support from the apical bone and interdental septal bone for attaining primary stability of IMI.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

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Inter radicular bone dimensions in primary stability of immediate molar implants – A cone beam computed tomography retrospective analysis

Sayed

Shaikh

et al. 2021

The Saudi Dental Journal

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“…Some articles were excluded after full-text review for the following reasons: Lack of data referring to BBT [ 65 , 66 , 67 , 68 ], measurement not by (CB)CT scan [ 69 ] patients matching the exclusion criteria [ 19 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 ], patients with implants [ 85 ], patients without teeth [ 86 ], data not displayed as mean and SD [ 56 ], site or kind of measurement not adequate [ 19 , 62 , 64 , 77 , 87 , 88 , 89 , 90 , 91 , 92 , 93 , 94 , 95 , 96 , 97 , 98 , 99 , 100 , 101 , 102 , 103 , 104 , 105 , 106 , 107 ,…”

Section: Resultsmentioning

confidence: 99%

Buccal Bone Thickness in Anterior and Posterior Teeth—A Systematic Review

et al. 2021

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(1) Background: Immediate dental implant placement has been a subject of great interest over the last decade. Here, information regarding the anatomy and bone thickness of the jaw prior to dental implant placement is crucial to increase the surgery’s success and the patient’s safety. The clinical premises for this approach have been controversially discussed. One of those heavily discussed premises is a buccal bone thickness of at least 1 mm thickness. This meta-analysis aims to systematically review buccal bone thickness (BBT) in healthy patients. Thus, the feasibility of immediate dental implant placement in daily practice can be assessed. (2) Methods: A search in the electronic databases was performed to identify articles reporting on BBT that was measured by computed tomography in adults. (3) Results: We were able to find 45 studies, including 4324 patients with 25,452 analyzed teeth. The analysis showed a BBT at the alveolar crest of 0.76 ± 0.49 mm in the maxillary frontal and of 1.42 ± 0.74 mm in the maxillary posterior region. In the mandible, the average measured values were similar to those in the maxilla (front: 0.95 ± 0.58 mm; posterior: 1.20 ± 0.96 mm). In the maxillary frontal region 74.4% and in the mandibular frontal region 61.2% of the crestal buccal bones showed widths <1 mm. (4) Conclusions: In more than 60% of the cases, the BBT at the alveolar crest is <1 mm in maxillary and mandibular frontal regions. This anatomic data supports careful pre-surgical assessment, planning of a buccal graft, and critical selection of indication for immediate implant placement, especially in the maxillary and mandibular frontal and premolar region.

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“…In contrast, an inter-radicular septum (IRS) is present in 74% of maxillary first and 44% of maxillary second molars. 12 Smith & Tarnow classification can be roughly utilized as a useful clinical guide for placing appropriate sizes of dental implants into the IRS. However, there appears to be no published numerical data to help clinicians define IRS dimensions before extraction for the three socket types established by Smith and Tarnow and how these dimensions might vary between first molar (MFM) and second maxillary molar (MSM) sites.…”

Section: Introductionmentioning

confidence: 99%

CBCT data relevant in treatment planning for immediate maxillary molar implant placement

Deporter

Dastgurdi

Azadeh³

et al. 2021

J Adv Periodontol Implant Dent

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Background. This study used CBCT images to evaluate the suitability of maxillary first and second molar sites to receive immediate implants. Buccopalatal and mesiodistal widths of maxillary molar inter-radicular septum were evaluated at three different levels (crestal, middle, and apical), in addition to assessments of the root apex and furcation proximities to the sinus floor and comparisons of these measurements between the first and second upper molar sites before extraction.Methods. A total of 427 dental sites from 223 patients were used to measure the buccopalatal and mesiodistal widths of inter-septal/furcal (IRS) bone of maxillary first and second molars and vertical distances from the furcation and from all the root apices to the sinus floor (SF).Results. Mean coronal-most buccopalatal/mesiodistal IRS widths were 7.33/6.52 mm for the first and 6.86/5.85 mm for the second molars (P=0.008). Corresponding mean FSD (furcation-sinus floor) values were 9.69 mm (range: 2.02-24.68 mm) and 8.84 mm (range: 1.48-25.09 mm). Mean distances from all the root apices to SF were <3 mm. The palatal roots of the first molars had higher sinus intrusion rates (28.85%) than their buccal counterparts, while for the second molars, the mesiobuccal roots showed the highest sinus intrusion (37.65%).Conclusion. In the current patient sample, 61.7% of the first and 34% of the second molars had a sufficiently broad IRS to encase a 5-mm-diameter IMI (immediate molar implant) completely. The mean FSD of 9 mm for both molars indicated that some sinus floor elevation would likely be needed unless short implants were used.

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Radiological Evaluation of the Dimensions of Lower Molar Alveoli

Cited by 9 publications

References 14 publications

Inter radicular bone dimensions in primary stability of immediate molar implants – A cone beam computed tomography retrospective analysis

Inter radicular bone dimensions in primary stability of immediate molar implants – A cone beam computed tomography retrospective analysis

Buccal Bone Thickness in Anterior and Posterior Teeth—A Systematic Review

CBCT data relevant in treatment planning for immediate maxillary molar implant placement

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