Tunnel Slot
To Zebra Canyon
Distance from Trailhead: 5.3 miles (round trip)
The “tunnel” is a long narrow slot over 200-ft. Long that is usually filled with water. Much of this route is exposed with little or no shade. Be sure to carry plenty of water. The route is best hiked in the spring and the fall. Videos Of Going Through Tunnel in Tunnel Slot Canyon and Crossing Ice. The reason this is called Tunnel Slot is because the canyon narrows to a narrow oval shape that you need to walk through. The problem is that this is usually filled up with water that can be at least up to the top of your legs. Tunneling provides a way to encapsulate arbitrary packets inside a transport protocol. Tunnels are implemented as a virtual interface to provide a simple interface for configuration.
Ending/Highest Elevation: 5,125-ft.
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Elevation Gain: -225-ft.
Note: This is an unmarked route. Make note of landmarks as you hike to facilitate finding your way back to the trailhead.
The route to Zebra Canyon starts 8.0 miles down the Hole in the Rock Road. (See driving directions below). From the parking area near the cattle guard, cross to the east side of the road and follow a boot beaten path east through scrub growth and junipers with distant views of Red Breaks. At 0.6 miles the route intersects the wash of Halfway Hollow. Initially the route does not travel in the sandy wash but instead periodically cuts across the wash and then traverses the adjacent benches to cut off meanders and walk along packed sand paths.
After walking a little over a mile Halfway Hollow starts looking less like a draw and more like a real canyon with sculpted sandstone walls. Watch for the boot beaten path that exits the wash at 1.5 miles. The trail now follows an ascending traverse along the north bench. The route reaches the high point on the bench at 1.9 miles. Here views extend east/northeast to the sandstone walls and formations along Harris Wash.
Descend the bench and reach Harris Wash at 2.0 miles. (Turn around and make note of the visible landmarks so you do not miss this turn on the return leg of the hike.) Turn left (northeast) and hike up the wide wash. The going is slow as you slog through the deep sandy wash.
Walk at tenth of a mile to a fork. Here Harris Wash curves left (northwest). We stay right and head into a side drainage. In a short distance a boot beaten path exists the wash and travels along the right (east) bench where the walking is considerably easier.
Travel along the side drainage for 0.4 miles. Soon you will see a narrow opening at the end of the drainage. This is Zebra Canyon. The canyon is short and quickly narrows. It is best to leave your backpack at the entrance to the slot. In places you will need to scramble over obstacles to work your way further up the canyon. The slot ends in about 0.25 miles at an impassable pour-off.
Nature’s artistry is finely displayed in this stunning slot. The further you go up the canyon the better it gets. The walls are decorated with intricate patterns of pink and white stripes. Wind and water have sculpted the walls into undulating surfaces. Cross cuts in the rock face twist and bend the patterns.
After exploring the slot retrace your steps to Harris Wash. If time and energy permits I suggest taking a side trip to Tunnel Slot.
1 New Methods of Detection of Caries 1
1.1 The Diagnosis of Caries 1
1.1.1 DIAGNOdent 5
1.1.2 Digital Imaging Fiber-Optic Transillumination 7
1.1.3 Fiber-Optic Transillumination 8
1.1.4 Quantitative Light-Induced Fluorescence 9
1.1.5 Radiology of Dental Caries 10
1.1.6 Electrical Conductance 12
1.1.7 Modern Caries Detection and Management 12
References 13
2 New Developments in Caries Removal and Restoration . . . 17
2.1 Caries Removal 17
2.1.1 Lasers 18
2.1.2 Polymer Bur 20
2.1.3 Micropreparation Burs 20
2.1.4 Air Abrasion (or Kinetic Cavity Preparation) 21
2.1.5 Photoactivated Disinfection 23
2.1.6 CarisolvGel 23
2.1.7 Atraumatic Restorative Treatment 24
2.1.8 Caries-Detector Dyes 25
2.2 Restoration Following Caries Detection 26
2.2.1 Why Are Teeth Restored? 26
2.2.2 Caries as a Disease 27
2.2.3 Preventing Dental Caries 28
2.2.4 When Should Caries Be Restored? 30
2.2.5 Fissure Sealants 32
2.2.6 Ozone Therapy for the Treatment of Caries 32
2.3 Restorative Procedures 34
2.3.1 The 'Tunnel' Restoration 34
2.3.2 The Proximal 'Slot' Preparation 34
2.3.3 Traditional Cavity Preparation 35
2.3.4 The Repaired Amalgam Restoration 37
2.3.5 Cavity Preparations Involving Three or More Surfaces 37
2.3.6 Treatment of the Large Carious Lesion 38
2.3.7 The Use of Calcium Hydroxide in Direct Pulp Capping 40
2.3.8 The Foundation Restoration 41
2.3.9 Practical Aspects of Amalgam Retention 42
2.3.10 Pins vs Bonded Restorations 43
2.3.11 Amalgam Bonding Procedure 44
2.3.12 The Use of Base Materials 45
References 45
3 Posterior Resin Composite Restorations 51
3.1 Ramped Curing Lights 52
3.2 Ceramic Inserts 52
3.3 Nanotechnology 54
3.4 'Total Etch' Technique 54
3.5 Fissure Sealants 55
3.6 Preventive Resin Restorations 56
3.7 Minimal Class II Restorations 57
3.8 Posterior Composite Resin Restoration 57
3.9 Direct Composite Resin Restorations 58
3.10 Studies of Direct Resin-Composite Restoration Survival 60
3.11 Reasons for Failure of Extensive Direct Composite
Resin Restorations 60
3.12 The 'Sandwich' Technique 62
3.13 Packable Composite Resin Materials 62
3.14 New Developments in Resin-Composite Technology 64
References 64
4 The Single Crown, Veneers, and Bleaching 67
4.1 The Single Crown 67
Tunnel Slot
4.1.1 Recurrent Caries and Periodontal Disease 67
4.1.2 The Tooth Becomes Nonvital 69
4.1.3 The Crown Restoration Becomes Loose 69
4.1.4 Perforation of the Crown During Occlusal Adjustment 73
4.1.5 The Appearance of the Crown is Unsatisfactory 74
4.1.5.1 Shade of the Crown 75
4.1.5.2 Shape of the Crown 76
4.1.5.3 Gingival Contour 76
4.1.5.4 Gingival Recession 76
4.2 New Developments in Crown Provision 78
4.3 Veneers 79
4.3.1 Tooth Preparation 79
4.3.2 Disadvantages of Veneers 81
4.3.3 Failure of Veneers 81
4.3.4 Cementation Procedures for a Veneer 83
4.3.5 Provisional Restorations for Veneers 83
4.4 Resin-Bonded All-Ceramic Crowns
(or 'Dentin-Bonded Crown') 84
4.4.1 Marginal Leakage 86
4.4.2 Cementation Procedures for the Resin-Bonded
All-Ceramic Crown 86
4.5 Bleaching of Teeth 87
4.5.1 Cervical Resorption 87
4.5.2 The 'Walking Bleach' Technique 88
4.5.3 Vital Tooth Bleaching 89
4.5.4 In-House Tooth Bleaching 90
4.6 Microabrasion 90
References 92
5 Noncarious Tooth Tissue Loss 95
5.1 Noncarious Tooth Wear 95
5.1.1 Clinical Appearance of Erosion 95
5.1.2 Clinical Appearance of Attrition 96
5.1.3 Clinical Appearance of Abrasion 97
5.2 Prevention of Toothwear 97
5.3 Recent Developments in the Treatment of Tooth Wear 100
5.3.1 Noncarious Cervical Restorations 100
5.3.2 Clinical Procedures for Restoration of Cervical Lesions 100
5.3.3 Why Do Cervical Restorations Fail? 101
5.3.4 New Developments in Direct Posterior Resin Composites . . . 103
5.3.5 Addition of Resin Composite to Anterior Teeth 104
5.3.6 Developments in Indirect Resin Composite Technology 105
5.3.6.1 Targis/Vectris Crowns 106
5.3.6.2 Sinfony 106
5.3.6.3 Belleglass HP 106
5.3.6.4 Other Fiber Systems 107
5.4 Ceramic Inlay and Onlay Restorations 107
5.5 Inlay Restorations 108
5.6 Onlay Restorations 109
Tunnel And Slot Preparation
5.6.1 Milled Ceramic Inlays or Onlays 111
5.6.1.2 IPS Empress System 112
5.6.1.3 Fortress 113
5.7 Full-Veneer Posterior Porcelain Crowns 115
5.7.1 In-Ceram 115
5.7.2 Procera AllCeram Crowns 116
5.8 Cementation of the Restoration 117
5.9 Choosing the Correct Restorative System 118
5.10 Conclusion 119
Treasure Tunnel Slot Machine
References 119
Subject Index 123
Tunnel Slot Canyon
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