The Relationship Between the Location of Subgingival Crown Margins and Gingival Inflammation

Newcomb, G. M.

doi:10.1902/jop.1974.45.3.151

Cited by 169 publications

(92 citation statements)

References 7 publications

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“…Por lo anterior, se observa con gran frecuencia en los procedimientos rehabilitadores la necesidad de preparaciones subgingivales que dificultan las restauraciones dentro de los padrones ideales (Newcomb;Maynard & Wilson;Mair;Kina et al, 2011).…”

Section: Discussionunclassified

“…Cabe destacar, que la preservación de esta distancia es fundamental para la adherencia del epitelio (Newcomb, 1974;Allen;Bartlett & Shah). Para el éxito de un tratamiento restaurador y/o rehabilitador es necesario que la línea de termino de la preparación coronaria se localice 3 a 4 mm de la cresta ósea alveolar, y entre 0,5-0,7 mm de profundidad dentro del surco gingival, preservando el epitelio de unión y tejido conjuntivo gingival (Hildebrand, 2003;Jain et al, 2011).…”

Section: Introductionunclassified

“…Así, los procedimientos quirúrgicos para restablecer el espacio biológico están indicados en diversas situaciones, tales como en presencia de lesiones cariosas subgingivales, fracturas, desgates acentuados que imposibiliten la rehabilitación a través de pró-tesis fijas (Studer et al;Camargo et al, 2001), exposi-ción radicular para aislamiento absoluto y perforaciones coronarias o radiculares subgingivales (Mair). Se contraindica en casos donde la osteotomía puede generar compromiso de furca, defectos óseos en los dientes adyacentes o causar alteraciones estéticas negativas en los dientes anteriores, entre otros (Newcomb;Robbins, 1999).…”

Section: Introductionunclassified

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Tratamiento Periodontal Quirúrgico en Rehabilitación Oral Estética: Reporte de Caso Clínico

Calefi¹,

Sorgini

Borie

et al. 2012

Int. J. Odontostomat.

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RESUMEN: La rehabilitación de dientes que presentan grandes desgastes por atrición, erosión o abfracción tiene como objetivo devolver la función y la estética comprometida. En muchos casos es necesario realizar tratamientos periodontales quirúrgicos previos para respetar el espacio biológico y así rehabilitar, posteriormente, en perfecta armonía los dientes afectados. Este reporte muestra la técnica y recuperación de un caso con desgastes severos en los dientes anteroinferiores, el cual se tuvo que someter a un tratamiento periodontal quirúrgico mediante osteotomía para recuperar la dimensión vertical perdida a través de restauraciones provisorias.PALABRAS CLAVE: cirugía periodontal, rehabilitación oral, estética, osteotomía, espacio biológico. INTRODUCCIÓNLa rehabilitación de dientes que presentan grandes desgastes por atrición, erosión o abfracción tiene como objetivo devolver la función y estética a los pacientes que ansían de ésta, además de ser unos de los pilares fundamentales de la salud oral (Mair, 1992;Scheutzel, 1996;Bartlett & Shah, 2006;Van't Spijker et al., 2009). Las condiciones clínicas tales como desgastes dentales severos por atrición, caries radicular y fractura dentaria, en algunos casos, dificultan o imposibilitan la restauración del tejido dentario dentro de los patrones técnicos y biológicos, lo que hace necesario un tratamiento periodontal quirúrgico para abordaje exitoso de estos casos (Scheutzel;Studer et al., 1996;Levine & Makrauer, 2003).Por otro lado, un periodonto saludable posee el denominado espacio biológico, el cual comprende el espacio entre la base del surco gingival y la cresta ósea alveolar (Maynard & Wilson, 1979;Allen, 1993;Studer et al). Cabe destacar, que la preservación de esta distancia es fundamental para la adherencia del epitelio (Newcomb, 1974;Allen;Bartlett & Shah). Para el éxito de un tratamiento restaurador y/o rehabilitador es necesario que la línea de termino de la preparación coronaria se localice 3 a 4 mm de la cresta ósea alveolar, y entre 0,5-0,7 mm de profundidad dentro del surco gingival, preservando el epitelio de unión y tejido conjuntivo gingival (Hildebrand, 2003;Jain et al., 2011). Así, los procedimientos quirúrgicos para restablecer el espacio biológico están indicados en diversas situaciones, tales como en presencia de lesiones cariosas subgingivales, fracturas, desgates acentuados que imposibiliten la rehabilitación a través de pró-tesis fijas (Studer et al.;Camargo et al., 2001), exposi-* Alumno Magister en Rehabilitación Oral,

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Section: Discussionunclassified

Section: Introductionunclassified

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Tratamiento Periodontal Quirúrgico en Rehabilitación Oral Estética: Reporte de Caso Clínico

Calefi¹,

Sorgini

Borie

et al. 2012

Int. J. Odontostomat.

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“…Whenever possible, a supragingivally finish lines should be preferred (11)(12)(13)(14)(15)(16)(17)(18)(19); when subgingival finish lines are required, they should preserve the epithelial attachment (20-22).…”

Section: Finish Line Locationmentioning

confidence: 99%

A tooth preparation technique in fixed prosthodontics for students and neophyte dentists

Rosella

Rosella²,

Brauner

et al. 2015

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A tooth preparation technique in fixed prosthodontics for students and neophyte dentists sonal experience with the novel technique. It could helps dental students and neophyte dentists in their learning curve.Key words: tooth preparation, fixed prosthodontics, dental education, prosthodontics. IntroductionTooth preparation for fixed prosthesis is a common procedure in clinical practice, which all general dentists should perform correctly. However, it could be difficult to obtain always a predictable result, especially for dental students or young doctors: they could make mistakes in their learning curve leading to inadequate results. Unlike other human substance, dental tissues don't have regenerative capacity. Therefore, the removal of dental biological material should be planned and executed with maximum attention (1). The purpose of a fixed prosthodontic therapy may vary from the restoration of a single tooth to the rehabilitation of the complete occlusion. A single tooth can be fully restored both functionally and aesthetically. A missing tooth can be replaced by a fixed prosthesis, increasing patient masticatory competence and maintaining or improving dental arches function, often elevating patient's self-image (2). Tooth preparation should have specific geometrical characteristics to provide necessary retention and resistance to the vertical and lateral forces acting on the restoration. The most important element of retention is the presence of two opposing vertical surfaces. The axial walls of the preparation should taper slightly to allow the cementation of the artificial crown. The more parallel are the axial walls the greater is the retention. However, it is impossible to obtain parallel surfaces without producing undercuts. Goodacre et al. (3) suggest an angle of convergence between 10 and 20°. Moreover, the occlusocervical length is another fundamental factor for both retention and resistance. The longer is the preparation the greater is the retention. Teeth with larger diameter need a greater length to prevent dislodgement (4). Proper occlusal and axial reductions are essentials to provide enough space, allowing a good functional morphology and structural durability. Moreover, no more than necessary dental tissues should be removed in order not to jeopardize tooth structure and retention of the restoration (2). Preston (5) and Miller (6) suggest starting the tooth preparation producing depth-orientation groves on the vestibular and incisal surfaces, with a round-end tapered diamond as reference for removing tooth structure. The occlusal reduction is performed by removing the tooth por- SummaryPurpose. The aim of this study was to evaluate a novel technique of tooth preparation in fixed prosthodontics suitable for dental students and neophyte dentists. Materials and methods.Twenty-four dental students of the sixth-year class were recruited to verify the predicibility of this technique. Each student prepared two mandibular second premolars on a typodont for a dental crown with a 90° shoulder finishin...

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“…Evidence from several studies favours the placement of supragingival margins whenever possible (3,5,6) as inflammatory response is universally associated with subgingival margins (7)(8)(9)(10). However, the fit and quality of the margins of restorations, both provisional and final, are important determinants of periodontal health.…”

Section: Black In 1908 (1) Sixty Years Later Löementioning

confidence: 99%

Margin width, internal line angle and labial emergence profiles of maxillary metalloceramic

Yahya

Youngson

2007

ADUM

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The purpose of this study were to compare the emergence profiles of crowns with their contralateral tooth, in vitro, and to determine if there is any association between the design of tooth preparations and the resultant emergence profile. 50 working models used for single crown construction were examined. Measurements of the faciolingual width of the crowns and contralateral teeth were taken using digital calipers. Internal line angles and the margin width of dies and the emergence profile of the corresponding crowns were measured from longitudinally sectioned polyvinylsiloxane indices mounted on a flat-bed scanner using image analysis software. Using Students t tests, no statistically significant differences (p>0.05) were found for shoulder width (mean 0.94 ± 0.23mm), internal line angle (mean 105.83 ± 13.57°) or emergence profiles (28.56 ± 12.95°) in the different (anterior, premolar or molar) preparations or crowns. The mean emergence profiles for all crowns was statistically significantly greater (p<0.001) than the contralateral tooth (mean 15.33 ± 7.77°). Using linear regression, there was a weak statistical relationship between emergence profile and margin width (Emergence profile° = 31.352 -2.973 x margin width (mm)). There was no statistical association between the internal line angle and the resultant emergence profile. In conclusion, the emergence profiles of crowns were higher than the contralateral teeth. Maxillary metalloceramic crown preparations had shoulder widths that did not conform to recommendations in standard texts but line angles were within a satisfactory range. The margin width exerts a weak effect upon the emergence profile of the crown.

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The Relationship Between the Location of Subgingival Crown Margins and Gingival Inflammation

Cited by 169 publications

References 7 publications

Tratamiento Periodontal Quirúrgico en Rehabilitación Oral Estética: Reporte de Caso Clínico

Tratamiento Periodontal Quirúrgico en Rehabilitación Oral Estética: Reporte de Caso Clínico

A tooth preparation technique in fixed prosthodontics for students and neophyte dentists

Margin width, internal line angle and labial emergence profiles of maxillary metalloceramic

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