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Register a new userThe Relationship between Oral Mucosal Tissue Thickness and Crestal Bone Resorption around Dental Implants
العلاقة بين ثخانة المخاطية الفموية والامتصاص العظمي حول عنق الغرسات السنية
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تهدف الدراسة إلى تقييم تأثير ثخانة النسيج المخاطي فوق قمة السنخ على الامتصاص العظمي حول عنق الغرسة السنية، وذلك خلال سنة من المتابعة . بلغ عدد الغرسات (24) غرسة، أنجزت على 9 مرضى من الجنسين ممن لديهم درد خلفي سفلي. تم تقسيم العينة إلى مجموعتين , المجموعة الأولى " المخاطية أكثر من 2مم " 12 غرسة، و المجموعة الثانية " المخاطية حتى2مم" 12 غرسة , و في كلتا المجموعتين تم وضع (6) غرسات (الشاهدة) عند مستوى قمة العظم السنخي، و ( 6)غرسات (الاختبار) فوق مستوى قمة العظم السنخي بـ 2 مم . أظهرت النتائج وجود زيادة في معدل الخسارة العظمية حول عنق الغرسة في المجموعة الثانية، وبفروق ذات دلالة إحصائية. نستنتج أن ثخانة المخاطية عند الغرس تؤثر على مقدار الخسارة العظمية حول عنق الغرسة حيث يحدث امتصاص زائد إذا كانت المخاطية رقيقة (حتى 2 مم) وقت الغرس.
The aim of the study was to evaluate the influence of the mucosal tissue thickness on the crestal bone resorption around dental implants during a year of follow-up. Nine patients of both sexes included in this study received 24 implants. Patients in the sample were divided into two groups: group I (mucosa above 2 mm, and 12 implants), and group II (mucosa up to 2 mm, and 12 implants). Implants in each group were divided into two groups: a control where 6 implants were placed at the crest level, and a test where (6) implants were placed 2mm supracrestally. The results revealed that there was an increase in crestal bone loss in group 2 with statistically significant differences. To conclude, the initial thickness of mucosa at the time of implant placement affects crestal bone loss; increased bon loss occurs when the tissue thickness is 2 mm or less at the time of implant placement.
References used
KIM, D.M; BADOVINAC RL, LORENZ RL, FIORELLINI JP, WEBER.H .P. A 10- year prospective clinical and radiographic study of one-stage dental implants. Clin Oral Implants Res,Vol. 19, 2008,P.254-258
LINKEVICIUS T, APSE P, GRYBAUSKAS S, PUISYS A. Reaction of crestal bone around implants to mucosal tissues of different thickness. A 1-year prospective clinical trial. Stomatologija, Baltic Dental and Maxillofacial Journal in press,2009
HERMANN, J.S; BUSER, D; SCHENK, R.K; COCHRAN, D.L . Crestal bone changes around titanium implants. A histometric evaluation of unloaded non-submerged and submerged implants in the canine mandible. J Periodontol ,Vol.71,2000,P.1412- 1424
WISKOTT, H.W; BELSER ,U.C. Lack of integration of smooth titanium surfaces: a working hypothesis based on strains generated in the surrounding bone. Clin Oral Implants Res,Vol. 10,1999,P.429-444
TOLJANIC, J.A; BANAKIS, M.L;WILLES, L.A; GRAHAM, L. Soft tissue exposure of endosseous implants between stage I and stage II surgery as a potential indicator of early crestal bone loss. Int J Oral Maxillofac Implants,Vol. 14,1999,P.436-441
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The purpose of this research is to study the effect of Subcrestal placement of dental
implants on marginal bone loss in immediate implantation. The research sample
comprised of 24 implants were immediately placed after extraction,12 implants have
placed at Equicrestal level (6 in the maxilla and 6 mandible) served as control group and
12 impalnts (6 in the maxilla and 6 mandible) have placed at Subcrestal level served as test
group. modified bleeding index MBI, probing pocket depth PPD and marginal bone loss
MBL Implant survival, evaluated for both groups. Mbl were 0.85 mm in control group and
1.30 mm in test group after one year of dental emplacement The results of the present
study showed that the success rate was 100% in both groups, there was no statistical
difference between the test and control regarding, MBI, while there was statistical
difference between the test and control regarding MBL, PPD. during periods of follow up .
Soft laser applications continue to improve local bone mineral density which is considered the most important factor in dental implant success.
This study aims to evaluate the Trabecular to Cortical bone ratio (TCr) index -as a simple easy measureme
nt index- that expresses the bone mineral density. This is to be able to predict the success of dental implants.
The study included 40 patients, who had a single implant in the lower molar region. The patients are divided into two groups: 20 patients had an implant with a soft laser application, i.e. GaAlAs laser (wavelength 830 nm), and 20 patients had an implant without a soft laser application.
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The study found a strong linear correlation between the TCr and (thickness ratio x density ratio) 0.001>P, R2= 0.842 36(r = 0.8. and equivalent Aluminium thickness(
0.001> P, R2 = 0.656735, (r = 0.8).
The study shows that TCr index expresses both radiographic indices which reflect the local bone density, which means that the TCr is associated with such density. Therefore, it can be used as an easy way to predict the quality of bone, and prognosticate the success of dental implants.
the density of bone having an obvious effect on the osseointegration and the
success of the dental implants. The aim of the present study is to evaluate the effect of different bone
qualities on the values and distribution of stresses at the bone – impla
Background& Objective: The reduction of alveolar crestal bone density is one of the earlier signs of periimplant
disease and precedes the loss of height of the alveolar crest, because of that early detection of the
small changes in density is impor
tant and lead to the early onset of treatment and increases its success's
percentage.
This study aimed to evaluate the ability of the direct conventional digital method in detection of density
changes around dental implants by the mean value of the gray level of the histogram of the selected area
comparing with radiographic subtraction method.
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