The effect of magnification on the iatrogenic damage to adjacent tooth surfaces during class II preparation

Abstract Four cases of peri-implant bone loss associated with undiagnosed necrotic pulps of adjacent teeth are reported. In two cases, bone was obliterated along sinus tracts (fistulas) that coursed between the implant and adjacent tooth. Endodontic treatment was completed on the adjacent teeth concurrent with periapical surgery to seal the tooth apex. The sinus tract (fistula) was excised, and the implant plus tooth surfaces were treated with a combination of concentrated citric acid and 4.3% sodium fluoride solutions. The third case involved peri-implant surgery with endodontic treatment on the adjacent tooth. A fourth case represented an infected socket augmentation which was surgically treated, augmented with microcrystalline fluorapatite in the range of a 300 µm to 400 µm cluster, and allowed to heal for 4 months followed by a trephine bone biopsy and subsequent analysis for bone growth around the fluoridated nonceramic microcrystalline hydroxyapatite (HA). An augmentation procedure employing fluoridated of resorbable HA was then completed. Histologic analysis showed healthy bone regeneration suggesting that therapeutic fluoride treatment and resultant fluorapatite were helpful in inhibiting reinfection following surgical treatment. All 4 infected implant sites were successfully managed and retained using the aforementioned treatment schemes, and there was no evidence of posttreatment infection in any of the 4 cases. It is proposed that fluoride treatment, through the use of 4.3% sodium fluoride and/or fluoridated hydroxyapatite (fluorapatite), shows promise as an adjunctive treatment component in inhibiting peri-implant infection and reinfection when managing ailing or failing implants.

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Association of age and gender distribution in patients having class II caries resulting in root canal treatment in lower premolars and molars

International Journal of Research in Pharmaceutical Sciences ◽

10.26452/ijrps.v11ispl4.4020 ◽

2020 ◽

Vol 11 (SPL4) ◽

pp. 698-703

Author(s):

Lasya Genji ◽

Subash Sharma ◽

Raghu Sandhya

Keyword(s):

Root Canal ◽

Class Ii ◽

Root Canal Treatment ◽

Age Group ◽

Age And Gender ◽

Gender Distribution ◽

Posterior Teeth ◽

Tooth Surfaces ◽

Male Patients ◽

And Gender

Caries or cavities is a breakdown of teeth due to acids made by bacteria. Individual tooth surfaces have different susceptibilities to caries which vary over time. Progress of caries towards the pulp leads to damage to the pulp. Caries 2 caries involve proximal surfaces of posterior teeth. The aim of the present study was to identify the association of age and gender distribution in patients having class II caries resulting in root canal treatment in lower premolars and molars. The data was collected from the DIAS - dental information archiving software. All case sheets were reviewed and findings are recorded. The data were tabulated using excel and analysed with the help of SPSS software. In this study, class II caries were common in the age group 60 to 70 years (73.9%). Males (63.8%) were more affected than females (36%). Lower molars (51%) showed a slightly higher incidence of class II caries when compared to premolars (49.4%). Within the limitations of the study, male patients showed a higher incidence of class II caries resulting in root canal treatment compared with female patients. 60 to 70 years was the commonly affected age group.

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Effect of Fluoridated Sealants on Adjacent Tooth Surfaces

Journal of Dental Research ◽

10.1177/0022034514535808 ◽

2014 ◽

Vol 93 (7_suppl) ◽

pp. 59S-65S ◽

Cited By ~ 19

Author(s):

M.G. Cagetti ◽

G. Carta ◽

F. Cocco ◽

S. Sale ◽

G. Congiu ◽

...

Keyword(s):

Adjacent Tooth ◽

Tooth Surfaces

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Risk factors for caries development on tooth surfaces adjacent to newly placed class II composites – a pragmatic, practice based study

BDJ ◽

10.1038/sj.bdj.2015.886 ◽

2015 ◽

Vol 219 (10) ◽

pp. 489-489

Keyword(s):

Risk Factors ◽

Class Ii ◽

Tooth Surfaces

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COMPARATIVE EVALUATION OF IATROGENIC DAMAGE IN CLASS II CAVITIES USING MAGNIFICATION TOOLS DURING TOOTH PREPARATION: AN IN VITRO STUDY

International Journal of Advanced Research ◽

10.21474/ijar01/12043 ◽

2020 ◽

Vol 8 (11) ◽

pp. 569-575

Author(s):

Pooja Yadav ◽

◽

Ashish Jain ◽

Rahul Rao ◽

Harshil Patel ◽

...

Keyword(s):

In Vitro Study ◽

Class Ii ◽

Vitro Study ◽

Tooth Surface ◽

Naked Eye ◽

Significant Difference ◽

Iatrogenic Damage ◽

Tooth Preparation ◽

Post Hoc

Aims: This is an vitro study compares and evaluates the effect of magnification tools on frequency and extent of iatrogenic damage to approximal tooth surface during conservative Class II cavity preparations. Methods and Material: 30 Typodont teeth were divided into 3 groups 10 typodont teeth in each group and were mounted on Phantom head. Teeth were prepared for class II (MO) cavity on 36 with conservative design using airotor with naked eye, loupes and microscope and iatrogenic damage was assessed on tooth no 35. Assessment of iatrogenic damage of all the groups was done by profilometer test. Statistical analysis used:Statistical analysis was done using one-way analysis of variance (ANOVA). Post-hoc pair-wise comparisons were done using Dunnetts test. Results: Results revealed that tooth preparation was better under microscopes and loupes with statistical significant difference for samples with loupes and microscope on comparison with naked eye. Study also expressed the difficulty faced during tooth preparation with microscope and loupes for the first time. Conclusions: Magnifying tools helps in better vision and less iatrogenic damage while preparing the tooth for restoration.

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Establishment of an Animal Model Using Recombinant NOD.B10.D2 Mice To Study Initial Adhesion of Oral Streptococci

Clinical and Diagnostic Laboratory Immunology ◽

10.1128/cdli.11.2.379-386.2004 ◽

2004 ◽

Vol 11 (2) ◽

pp. 379-386 ◽

Cited By ~ 22

Author(s):

Mohammad Abdus Salam ◽

Naoko Matsumoto ◽

Khairul Matin ◽

Yuzo Tsuha ◽

Ryoma Nakao ◽

...

Keyword(s):

Animal Model ◽

Mhc Class Ii ◽

Biofilm Formation ◽

Class Ii ◽

Class I ◽

Dry Mouth ◽

Oral Streptococci ◽

Oral Biofilm ◽

Initial Adhesion ◽

Tooth Surfaces

ABSTRACT An oral biofilm is a community of surface-attached microorganisms that coats the oral cavity, including the teeth, and provides a protective reservoir for oral microbial pathogens, which are the primary cause of persistent and chronic infectious diseases in patients with dry mouth or Sjögren's syndrome (SS). The purpose of this study was to establish an animal model for studying the initial adhesion of oral streptococci that cause biofilm formation in patients with dry mouth and SS in an attempt to decrease the influence of cariogenic organisms and their substrates. In nonobese diabetogenic (NOD) mice that spontaneously develop insulin-dependent diabetes mellitus (IDDM) and SS, we replaced major histocompatibility complex (MHC) class II (Ag7 Eg7 ) and class I Db with MHC class II (Ad Ed ) and class I Dd from nondiabetic B10.D2 mice to produce an animal model that inhibited IDDM without affecting SS. The adhesion of oral streptococci, including Streptococcus mutans, onto tooth surfaces was then investigated and quantified in homologous recombinant N5 (NOD.B10.D2) and N9 (NOD.B10.D2) mice. We found that a higher number of oral streptococci adhered to the tooth surfaces of N5 (NOD.B10.D2) and N9 (NOD.B10.D2) mice than to those of the control C57BL/6 and B10.D2 mice. On the basis of our observation, we concluded that these mouse models might be useful as animal models of dry mouth and SS for in vivo biological studies of oral biofilm formation on the tooth surfaces.

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Electron microscopy analysis of degenerating pancreatic ß cells in transgenic mice expressing the MHC Class I antigen Dd

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100160297 ◽

1990 ◽

Vol 48 (3) ◽

pp. 548-549

Author(s):

T. A. Stewart ◽

D. Liggitt ◽

S. Pitts ◽

L. Martin ◽

M. Siegel ◽

...

Keyword(s):

Type I Diabetes ◽

Disease Process ◽

Class Ii ◽

Class I ◽

Type I ◽

Aberrant Expression ◽

Mhc Molecules ◽

Endogenous Insulin ◽

Class Ii Mhc ◽

Ifn Γ

Insulin-dependant (Type I) diabetes mellitus (IDDM) is a metabolic disorder resulting from the lack of endogenous insulin secretion. The disease is thought to result from the autoimmune mediated destruction of the insulin producing ß cells within the islets of Langerhans. The disease process is probably triggered by environmental agents, e.g. virus or chemical toxins on a background of genetic susceptibility associated with particular alleles within the major histocompatiblity complex (MHC). The relation between IDDM and the MHC locus has been reinforced by the demonstration of both class I and class II MHC proteins on the surface of ß cells from newly diagnosed patients as well as mounting evidence that IDDM has an autoimmune pathogenesis. In 1984, a series of observations were used to advance a hypothesis, in which it was suggested that aberrant expression of class II MHC molecules, perhaps induced by gamma-interferon (IFN γ) could present self antigens and initiate an autoimmune disease. We have tested some aspects of this model and demonstrated that expression of IFN γ by pancreatic ß cells can initiate an inflammatory destruction of both the islets and pancreas and does lead to IDDM.

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